Repository: vega/vl-convert (language: python)

Issue:
Allow A Configuration file in `~/.config/vl-convert/config.json`
I could imagine some fun tools making use of `vl-convert` in a terminal context where having a general config file would be nice (with semantics like `{ config: { ...userConfig, ...specConfig } }`). I would imagine that the config would just be a regular [`config`](https://vega.github.io/vega-lite/docs/config.html).


Discussion / hints:
That's a cool idea! We should also add support for providing an explicit config file to the various conversion functions.
Do you think it should support everything in the `options` parameter of [`vegaLite.compile`](https://vega.github.io/vega-lite/usage/compile.html)? Basically, what I'm trying to figure out is if a data structure like the following would be useful to add the following data structure as a parameter in `InnerVlConverter::init_vl_version()`:

```rust
struct VLCompileOptions<'c, 'l, 'f> {
  config: Option<&'c str>,
  logger: Option<&'l str>,
  field_title: Option<&'f str>
}
```

(_using `&'a str` because I'm assuming zero-copy-deserialization_)

I only really feel strongly about the `config` portion, but the above might be better forwards compatibility if we decide to support the latter two.
I think the `config` values make sense, but not the others at this point (as they are pretty JavaScript specific).

I think I would picture making `config` an argument to the `vegalite_to_*` functions. It would be fine to pull default values from a config file, but I think it would be nice to be able to set it for individual conversions.
For what it's worth, the reason I'm suggesting config in the `vegaLite.compile` is specifically because it has the semantics:

> Note that configuration properties provided via the `config` property in the Vega-Lite specification, will override the configurations passed in through the `compile function`.
Should [named themes](https://github.com/vega/vega-themes) be handled through the same config object? Or to you think we'll need a separate theme configuration setting? 

Fix patch:
diff --git a/Cargo.lock b/Cargo.lock
index 5dc2c6ac..e6163d5f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1039,6 +1039,26 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "dirs"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3aa72a6f96ea37bbc5aa912f6788242832f75369bdfdadcb0e38423f100059"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b1d1d91c932ef41c0f2663aa8b0ca0342d444d842c06914aa0a7e352d0bada6"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "dlopen"
 version = "0.1.8"
@@ -1173,6 +1193,15 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
 
+[[package]]
+name = "fastrand"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+dependencies = [
+ "instant",
+]
+
 [[package]]
 name = "ff"
 version = "0.12.0"
@@ -1799,6 +1828,15 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e567468c50f3d4bc7397702e09b380139f9b9288b4e909b070571007f8b5bf78"
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "ipconfig"
 version = "0.3.0"
@@ -2744,6 +2782,17 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
+dependencies = [
+ "getrandom 0.2.7",
+ "redox_syscall",
+ "thiserror",
+]
+
 [[package]]
 name = "regex"
 version = "1.6.0"
@@ -2767,6 +2816,15 @@ version = "0.6.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
+[[package]]
+name = "remove_dir_all"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "renderdoc-sys"
 version = "0.7.1"
@@ -3252,6 +3310,15 @@ dependencies = [
  "digest 0.10.5",
 ]
 
+[[package]]
+name = "shellexpand"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd1c7ddea665294d484c39fd0c0d2b7e35bbfe10035c5fe1854741a57f6880e1"
+dependencies = [
+ "dirs",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.0"
@@ -3451,6 +3518,20 @@ version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c02424087780c9b71cc96799eaeddff35af2bc513278cda5c99fc1f5d026d3c1"
 
+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"
@@ -3991,9 +4072,12 @@ version = "0.6.0"
 dependencies = [
  "assert_cmd",
  "clap",
+ "itertools",
  "predicates",
  "rstest",
  "serde_json",
+ "shellexpand",
+ "tempfile",
  "tokio",
  "vl-convert-rs",
 ]
diff --git a/README.md b/README.md
index 5414faff..1a649c39 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,14 @@ vl-convert: A utility for converting Vega-Lite specifications
 Usage: vl-convert <COMMAND>
 
 Commands:
-  vl2vg   Convert a Vega-Lite specification to a Vega specification
-  vl2svg  Convert a Vega-Lite specification to an SVG image
-  vl2png  Convert a Vega-Lite specification to an PNG image
-  vg2svg  Convert a Vega specification to an SVG image
-  vg2png  Convert a Vega specification to an PNG image
-  help    Print this message or the help of the given subcommand(s)
+  vl2vg      Convert a Vega-Lite specification to a Vega specification
+  vl2svg     Convert a Vega-Lite specification to an SVG image
+  vl2png     Convert a Vega-Lite specification to an PNG image
+  vg2svg     Convert a Vega specification to an SVG image
+  vg2png     Convert a Vega specification to an PNG image
+  ls-themes  List available themes
+  cat-theme  Print the config JSON for a theme
+  help       Print this message or the help of the given subcommand(s)
 
 Options:
   -h, --help     Print help information
diff --git a/thirdparty_rust.yaml b/thirdparty_rust.yaml
index 68dcb37f..36feb09e 100644
--- a/thirdparty_rust.yaml
+++ b/thirdparty_rust.yaml
@@ -649,6 +649,22 @@ third_party_libraries:
         text: "Copyright (c) 2017 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. 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+  - package_name: dirs
+    package_version: 4.0.0
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. 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Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
+  - package_name: dirs-sys
+    package_version: 0.3.7
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
   - package_name: dlopen
     package_version: 0.1.8
     license: MIT
@@ -1907,6 +1923,12 @@ third_party_libraries:
     licenses:
       - license: MIT
         text: "Copyright (c) 2017 Redox OS Developers\n\nMIT License\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n\"Software\"), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\nNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\nLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\nWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
+  - package_name: redox_users
+    package_version: 0.4.3
+    license: MIT
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2017 Jose Narvaez\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n\n"
   - package_name: regex
     package_version: 1.6.0
     license: MIT OR Apache-2.0
@@ -2197,6 +2219,14 @@ third_party_libraries:
         text: "Copyright (c) 2006-2009 Graydon Hoare\nCopyright (c) 2009-2013 Mozilla Foundation\nCopyright (c) 2016 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
+  - package_name: shellexpand
+    package_version: 3.0.0
+    license: MIT/Apache-2.0
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2016 Vladimir Matveev\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n\thttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
   - package_name: signal-hook-registry
     package_version: 1.4.0
     license: Apache-2.0/MIT
diff --git a/vl-convert-python/src/lib.rs b/vl-convert-python/src/lib.rs
index 91c439a5..75bf6f43 100644
--- a/vl-convert-python/src/lib.rs
+++ b/vl-convert-python/src/lib.rs
@@ -4,7 +4,7 @@ use pyo3::types::{PyBytes, PyDict};
 use pythonize::{depythonize, pythonize};
 use std::str::FromStr;
 use std::sync::Mutex;
-use vl_convert_rs::converter::TOKIO_RUNTIME;
+use vl_convert_rs::converter::{VlOpts, TOKIO_RUNTIME};
 use vl_convert_rs::module_loader::import_map::VlVersion;
 use vl_convert_rs::serde_json;
 use vl_convert_rs::text::register_font_directory as register_font_directory_rs;
@@ -22,17 +22,22 @@ lazy_static! {
 ///
 /// Args:
 ///     vl_spec (str | dict): Vega-Lite JSON specification string or dict
-///     vl_version (str): Vega-Lite library version string (e.g. 'v5.5')
+///     vl_version (str | None): Vega-Lite library version string (e.g. 'v5.5')
 ///         (default to latest)
-///     pretty (bool): If True, pretty-print resulting Vega JSON
-///         specification (default False)
-///
+///     config (dict | None): Chart configuration object to apply during conversion
+///     theme (str | None): Named theme (e.g. "dark") to apply during conversion
 /// Returns:
 ///     dict: Vega JSON specification dict
 #[pyfunction]
-#[pyo3(text_signature = "(vl_spec, vl_version, pretty)")]
-fn vegalite_to_vega(vl_spec: PyObject, vl_version: Option<&str>) -> PyResult<PyObject> {
+#[pyo3(text_signature = "(vl_spec, vl_version, config, theme)")]
+fn vegalite_to_vega(
+    vl_spec: PyObject,
+    vl_version: Option<&str>,
+    config: Option<PyObject>,
+    theme: Option<String>,
+) -> PyResult<PyObject> {
     let vl_spec = parse_json_spec(vl_spec)?;
+    let config = config.and_then(|c| parse_json_spec(c).ok());
 
     let vl_version = if let Some(vl_version) = vl_version {
         VlVersion::from_str(vl_version)?
@@ -43,7 +48,14 @@ fn vegalite_to_vega(vl_spec: PyObject, vl_version: Option<&str>) -> PyResult<PyO
     let mut converter = VL_CONVERTER
         .lock()
         .expect("Failed to acquire lock on Vega-Lite converter");
-    let vega_spec = match TOKIO_RUNTIME.block_on(converter.vegalite_to_vega(vl_spec, vl_version)) {
+    let vega_spec = match TOKIO_RUNTIME.block_on(converter.vegalite_to_vega(
+        vl_spec,
+        VlOpts {
+            vl_version,
+            config,
+            theme,
+        },
+    )) {
         Ok(vega_spec) => vega_spec,
         Err(err) => {
             return Err(PyValueError::new_err(format!(
@@ -90,15 +102,22 @@ fn vega_to_svg(vg_spec: PyObject) -> PyResult<String> {
 ///
 /// Args:
 ///     vl_spec (str | dict): Vega-Lite JSON specification string or dict
-///     vl_version (str): Vega-Lite library version string (e.g. 'v5.5')
+///     vl_version (str | None): Vega-Lite library version string (e.g. 'v5.5')
 ///         (default to latest)
-///
+///     config (dict | None): Chart configuration object to apply during conversion
+///     theme (str | None): Named theme (e.g. "dark") to apply during conversion
 /// Returns:
 ///     str: SVG image string
 #[pyfunction]
-#[pyo3(text_signature = "(vl_spec, vl_version)")]
-fn vegalite_to_svg(vl_spec: PyObject, vl_version: Option<&str>) -> PyResult<String> {
+#[pyo3(text_signature = "(vl_spec, vl_version, config, theme)")]
+fn vegalite_to_svg(
+    vl_spec: PyObject,
+    vl_version: Option<&str>,
+    config: Option<PyObject>,
+    theme: Option<String>,
+) -> PyResult<String> {
     let vl_spec = parse_json_spec(vl_spec)?;
+    let config = config.and_then(|c| parse_json_spec(c).ok());
 
     let vl_version = if let Some(vl_version) = vl_version {
         VlVersion::from_str(vl_version)?
@@ -110,7 +129,14 @@ fn vegalite_to_svg(vl_spec: PyObject, vl_version: Option<&str>) -> PyResult<Stri
         .lock()
         .expect("Failed to acquire lock on Vega-Lite converter");
 
-    let svg = match TOKIO_RUNTIME.block_on(converter.vegalite_to_svg(vl_spec, vl_version)) {
+    let svg = match TOKIO_RUNTIME.block_on(converter.vegalite_to_svg(
+        vl_spec,
+        VlOpts {
+            vl_version,
+            config,
+            theme,
+        },
+    )) {
         Ok(vega_spec) => vega_spec,
         Err(err) => {
             return Err(PyValueError::new_err(format!(
@@ -162,15 +188,19 @@ fn vega_to_png(vg_spec: PyObject, scale: Option<f32>) -> PyResult<PyObject> {
 ///     vl_version (str): Vega-Lite library version string (e.g. 'v5.5')
 ///         (default to latest)
 ///     scale (float): Image scale factor (default 1.0)
+///     config (dict | None): Chart configuration object to apply during conversion
+///     theme (str | None): Named theme (e.g. "dark") to apply during conversion
 ///
 /// Returns:
 ///     bytes: PNG image data
 #[pyfunction]
-#[pyo3(text_signature = "(vl_spec, vl_version, scale)")]
+#[pyo3(text_signature = "(vl_spec, vl_version, scale, config, theme)")]
 fn vegalite_to_png(
     vl_spec: PyObject,
     vl_version: Option<&str>,
     scale: Option<f32>,
+    config: Option<PyObject>,
+    theme: Option<String>,
 ) -> PyResult<PyObject> {
     let vl_version = if let Some(vl_version) = vl_version {
         VlVersion::from_str(vl_version)?
@@ -178,21 +208,29 @@ fn vegalite_to_png(
         Default::default()
     };
     let vl_spec = parse_json_spec(vl_spec)?;
+    let config = config.and_then(|c| parse_json_spec(c).ok());
 
     let mut converter = VL_CONVERTER
         .lock()
         .expect("Failed to acquire lock on Vega-Lite converter");
 
-    let png_data =
-        match TOKIO_RUNTIME.block_on(converter.vegalite_to_png(vl_spec, vl_version, scale)) {
-            Ok(vega_spec) => vega_spec,
-            Err(err) => {
-                return Err(PyValueError::new_err(format!(
-                    "Vega to SVG conversion failed:\n{}",
-                    err
-                )))
-            }
-        };
+    let png_data = match TOKIO_RUNTIME.block_on(converter.vegalite_to_png(
+        vl_spec,
+        VlOpts {
+            vl_version,
+            config,
+            theme,
+        },
+        scale,
+    )) {
+        Ok(vega_spec) => vega_spec,
+        Err(err) => {
+            return Err(PyValueError::new_err(format!(
+                "Vega to SVG conversion failed:\n{}",
+                err
+            )))
+        }
+    };
 
     Ok(Python::with_gil(|py| -> PyObject {
         PyObject::from(PyBytes::new(py, png_data.as_slice()))
@@ -263,6 +301,30 @@ fn get_local_tz() -> PyResult<Option<String>> {
     Ok(local_tz)
 }
 
+/// Get the config dict for each built-in theme
+///
+/// Returns:
+///     dict: dict from theme name to config object
+#[pyfunction]
+#[pyo3(text_signature = "()")]
+fn get_themes() -> PyResult<PyObject> {
+    let mut converter = VL_CONVERTER
+        .lock()
+        .expect("Failed to acquire lock on Vega-Lite converter");
+    let themes = match TOKIO_RUNTIME.block_on(converter.get_themes()) {
+        Ok(themes) => themes,
+        Err(err) => {
+            return Err(PyValueError::new_err(format!(
+                "get_themes request failed:\n{}",
+                err
+            )))
+        }
+    };
+    Python::with_gil(|py| -> PyResult<PyObject> {
+        pythonize(py, &themes).map_err(|err| PyValueError::new_err(err.to_string()))
+    })
+}
+
 /// Convert Vega-Lite specifications to other formats
 #[pymodule]
 fn vl_convert(_py: Python, m: &PyModule) -> PyResult<()> {
@@ -273,6 +335,7 @@ fn vl_convert(_py: Python, m: &PyModule) -> PyResult<()> {
     m.add_function(wrap_pyfunction!(vega_to_png, m)?)?;
     m.add_function(wrap_pyfunction!(register_font_directory, m)?)?;
     m.add_function(wrap_pyfunction!(get_local_tz, m)?)?;
+    m.add_function(wrap_pyfunction!(get_themes, m)?)?;
     m.add("__version__", env!("CARGO_PKG_VERSION"))?;
     Ok(())
 }
diff --git a/vl-convert-python/thirdparty_rust.yaml b/vl-convert-python/thirdparty_rust.yaml
index 68dcb37f..36feb09e 100644
--- a/vl-convert-python/thirdparty_rust.yaml
+++ b/vl-convert-python/thirdparty_rust.yaml
@@ -649,6 +649,22 @@ third_party_libraries:
         text: "Copyright (c) 2017 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. 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Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
+  - package_name: dirs
+    package_version: 4.0.0
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
+  - package_name: dirs-sys
+    package_version: 0.3.7
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
   - package_name: dlopen
     package_version: 0.1.8
     license: MIT
@@ -1907,6 +1923,12 @@ third_party_libraries:
     licenses:
       - license: MIT
         text: "Copyright (c) 2017 Redox OS Developers\n\nMIT License\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n\"Software\"), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\nNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\nLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\nWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
+  - package_name: redox_users
+    package_version: 0.4.3
+    license: MIT
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2017 Jose Narvaez\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n\n"
   - package_name: regex
     package_version: 1.6.0
     license: MIT OR Apache-2.0
@@ -2197,6 +2219,14 @@ third_party_libraries:
         text: "Copyright (c) 2006-2009 Graydon Hoare\nCopyright (c) 2009-2013 Mozilla Foundation\nCopyright (c) 2016 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. 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+  - package_name: shellexpand
+    package_version: 3.0.0
+    license: MIT/Apache-2.0
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2016 Vladimir Matveev\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. 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Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n\thttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
   - package_name: signal-hook-registry
     package_version: 1.4.0
     license: Apache-2.0/MIT
diff --git a/vl-convert-rs/examples/conversion1.rs b/vl-convert-rs/examples/conversion1.rs
index 50b56c0d..04c10422 100644
--- a/vl-convert-rs/examples/conversion1.rs
+++ b/vl-convert-rs/examples/conversion1.rs
@@ -1,3 +1,4 @@
+use vl_convert_rs::converter::VlOpts;
 use vl_convert_rs::{VlConverter, VlVersion};
 
 #[tokio::main]
@@ -26,7 +27,13 @@ async fn main() {
     .unwrap();
 
     let vega_spec = converter
-        .vegalite_to_vega(vl_spec, VlVersion::v5_5)
+        .vegalite_to_vega(
+            vl_spec,
+            VlOpts {
+                vl_version: VlVersion::v5_5,
+                ..Default::default()
+            },
+        )
         .await
         .expect("Failed to perform Vega-Lite to Vega conversion");
 
diff --git a/vl-convert-rs/src/converter.rs b/vl-convert-rs/src/converter.rs
index cabf9af6..e232e61e 100644
--- a/vl-convert-rs/src/converter.rs
+++ b/vl-convert-rs/src/converter.rs
@@ -1,4 +1,4 @@
-use crate::module_loader::import_map::{url_for_path, vega_url, VlVersion};
+use crate::module_loader::import_map::{url_for_path, vega_themes_url, vega_url, VlVersion};
 use crate::module_loader::VlConvertModuleLoader;
 use std::collections::{HashMap, HashSet};
 use std::path::Path;
@@ -36,6 +36,13 @@ lazy_static! {
     static ref NEXT_ARG_ID: Arc<Mutex<i32>> = Arc::new(Mutex::new(0));
 }
 
+#[derive(Debug, Clone, Default)]
+pub struct VlOpts {
+    pub config: Option<serde_json::Value>,
+    pub theme: Option<String>,
+    pub vl_version: VlVersion,
+}
+
 fn set_json_arg(arg: serde_json::Value) -> Result<i32, AnyError> {
     // Increment arg id
     let id = match NEXT_ARG_ID.lock() {
@@ -98,8 +105,15 @@ impl InnerVlConverter {
 var vega;
 import('{vega_url}').then((imported) => {{
     vega = imported;
-}})"#,
-                vega_url = vega_url()
+}})
+
+var vegaThemes;
+import('{vega_themes_url}').then((imported) => {{
+    vegaThemes = imported;
+}})
+"#,
+                vega_url = vega_url(),
+                vega_themes_url = vega_themes_url(),
             );
 
             self.worker.execute_script("<anon>", &import_str)?;
@@ -173,13 +187,29 @@ import('{vl_url}').then((imported) => {{
             // Create and initialize function string
             let function_str = format!(
                 r#"
-function compileVegaLite_{ver_name}(vlSpec) {{
+function compileVegaLite_{ver_name}(vlSpec, config, theme) {{
     let options = {{}};
+
+    // Handle config and theme
+    if (theme != null) {{
+        options["config"] = vega.mergeConfig(vegaThemes[theme], config ?? {{}});
+    }} else if (config != null) {{
+        options["config"] = config;
+    }}
+
     return {ver_name}.compile(vlSpec, options).spec
 }}
 
-function vegaLiteToSvg_{ver_name}(vlSpec) {{
+function vegaLiteToSvg_{ver_name}(vlSpec, config, theme) {{
     let options = {{}};
+
+    // Handle config and theme
+    if (theme != null) {{
+        options["config"] = vega.mergeConfig(vegaThemes[theme], config ?? {{}});
+    }} else if (config != null) {{
+        options["config"] = config;
+    }}
+
     let vgSpec = {ver_name}.compile(vlSpec, options).spec;
     return vegaToSvg(vgSpec)
 }}
@@ -309,19 +339,32 @@ function vegaLiteToSvg_{ver_name}(vlSpec) {{
     pub async fn vegalite_to_vega(
         &mut self,
         vl_spec: &serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
     ) -> Result<serde_json::Value, AnyError> {
-        self.init_vl_version(&vl_version).await?;
+        self.init_vega().await?;
+        self.init_vl_version(&vl_opts.vl_version).await?;
+        let config = vl_opts.config.clone().unwrap_or(serde_json::Value::Null);
+
+        let spec_arg_id = set_json_arg(vl_spec.clone())?;
+        let config_arg_id = set_json_arg(config)?;
+
+        let theme_arg = match &vl_opts.theme {
+            None => "null".to_string(),
+            Some(s) => format!("'{}'", s),
+        };
 
-        let arg_id = set_json_arg(vl_spec.clone())?;
         let code = format!(
             r#"
 compileVegaLite_{ver_name:?}(
-    JSON.parse(Deno.core.ops.op_get_json_arg({arg_id}))
+    JSON.parse(Deno.core.ops.op_get_json_arg({spec_arg_id})),
+    JSON.parse(Deno.core.ops.op_get_json_arg({config_arg_id})),
+    {theme_arg}
 )
 "#,
-            ver_name = vl_version,
-            arg_id = arg_id
+            ver_name = vl_opts.vl_version,
+            spec_arg_id = spec_arg_id,
+            config_arg_id = config_arg_id,
+            theme_arg = theme_arg,
         );
 
         let value = self.execute_script_to_json(&code).await?;
@@ -331,23 +374,34 @@ compileVegaLite_{ver_name:?}(
     pub async fn vegalite_to_svg(
         &mut self,
         vl_spec: &serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
     ) -> Result<String, AnyError> {
         self.init_vega().await?;
-        self.init_vl_version(&vl_version).await?;
+        self.init_vl_version(&vl_opts.vl_version).await?;
+
+        let config = vl_opts.config.clone().unwrap_or(serde_json::Value::Null);
+        let spec_arg_id = set_json_arg(vl_spec.clone())?;
+        let config_arg_id = set_json_arg(config)?;
+        let theme_arg = match &vl_opts.theme {
+            None => "null".to_string(),
+            Some(s) => format!("'{}'", s),
+        };
 
-        let arg_id = set_json_arg(vl_spec.clone())?;
         let code = format!(
             r#"
 var svg;
 vegaLiteToSvg_{ver_name:?}(
-    JSON.parse(Deno.core.ops.op_get_json_arg({arg_id}))
+    JSON.parse(Deno.core.ops.op_get_json_arg({spec_arg_id})),
+    JSON.parse(Deno.core.ops.op_get_json_arg({config_arg_id})),
+    {theme_arg}
 ).then((result) => {{
     svg = result;
 }});
 "#,
-            ver_name = vl_version,
-            arg_id = arg_id,
+            ver_name = vl_opts.vl_version,
+            spec_arg_id = spec_arg_id,
+            config_arg_id = config_arg_id,
+            theme_arg = theme_arg,
         );
         self.worker.execute_script("<anon>", &code)?;
         self.worker.run_event_loop(false).await?;
@@ -390,12 +444,27 @@ vegaToSvg(
             Ok(Some(value))
         }
     }
+
+    pub async fn get_themes(&mut self) -> Result<serde_json::Value, AnyError> {
+        self.init_vega().await?;
+
+        let code = r#"
+var themes = Object.assign({}, vegaThemes);
+delete themes.version
+delete themes.default
+"#;
+        self.worker.execute_script("<anon>", code)?;
+        self.worker.run_event_loop(false).await?;
+
+        let value = self.execute_script_to_json("themes").await?;
+        Ok(value)
+    }
 }
 
 pub enum VlConvertCommand {
     VlToVg {
         vl_spec: serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
         responder: oneshot::Sender<Result<serde_json::Value, AnyError>>,
     },
     VgToSvg {
@@ -404,12 +473,15 @@ pub enum VlConvertCommand {
     },
     VlToSvg {
         vl_spec: serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
         responder: oneshot::Sender<Result<String, AnyError>>,
     },
     GetLocalTz {
         responder: oneshot::Sender<Result<Option<String>, AnyError>>,
     },
+    GetThemes {
+        responder: oneshot::Sender<Result<serde_json::Value, AnyError>>,
+    },
 }
 
 /// Struct for performing Vega-Lite to Vega conversions using the Deno v8 Runtime
@@ -439,7 +511,7 @@ pub enum VlConvertCommand {
 /// }   "#).unwrap();
 ///
 ///     let vega_spec = futures::executor::block_on(
-///         converter.vegalite_to_vega(vl_spec, VlVersion::v5_5)
+///         converter.vegalite_to_vega(vl_spec, Default::default())
 ///     ).expect(
 ///         "Failed to perform Vega-Lite to Vega conversion"
 ///     );
@@ -463,11 +535,11 @@ impl VlConverter {
                 match cmd {
                     VlConvertCommand::VlToVg {
                         vl_spec,
-                        vl_version,
+                        vl_opts,
                         responder,
                     } => {
                         let vega_spec =
-                            TOKIO_RUNTIME.block_on(inner.vegalite_to_vega(&vl_spec, vl_version));
+                            TOKIO_RUNTIME.block_on(inner.vegalite_to_vega(&vl_spec, vl_opts));
                         responder.send(vega_spec).ok();
                     }
                     VlConvertCommand::VgToSvg { vg_spec, responder } => {
@@ -476,17 +548,21 @@ impl VlConverter {
                     }
                     VlConvertCommand::VlToSvg {
                         vl_spec,
-                        vl_version,
+                        vl_opts,
                         responder,
                     } => {
                         let svg_result =
-                            TOKIO_RUNTIME.block_on(inner.vegalite_to_svg(&vl_spec, vl_version));
+                            TOKIO_RUNTIME.block_on(inner.vegalite_to_svg(&vl_spec, vl_opts));
                         responder.send(svg_result).ok();
                     }
                     VlConvertCommand::GetLocalTz { responder } => {
                         let local_tz = TOKIO_RUNTIME.block_on(inner.get_local_tz());
                         responder.send(local_tz).ok();
                     }
+                    VlConvertCommand::GetThemes { responder } => {
+                        let themes = TOKIO_RUNTIME.block_on(inner.get_themes());
+                        responder.send(themes).ok();
+                    }
                 }
             }
             Ok(())
@@ -501,12 +577,12 @@ impl VlConverter {
     pub async fn vegalite_to_vega(
         &mut self,
         vl_spec: serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
     ) -> Result<serde_json::Value, AnyError> {
         let (resp_tx, resp_rx) = oneshot::channel::<Result<serde_json::Value, AnyError>>();
         let cmd = VlConvertCommand::VlToVg {
             vl_spec,
-            vl_version,
+            vl_opts,
             responder: resp_tx,
         };
 
@@ -554,12 +630,12 @@ impl VlConverter {
     pub async fn vegalite_to_svg(
         &mut self,
         vl_spec: serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
     ) -> Result<String, AnyError> {
         let (resp_tx, resp_rx) = oneshot::channel::<Result<String, AnyError>>();
         let cmd = VlConvertCommand::VlToSvg {
             vl_spec,
-            vl_version,
+            vl_opts,
             responder: resp_tx,
         };
 
@@ -593,11 +669,11 @@ impl VlConverter {
     pub async fn vegalite_to_png(
         &mut self,
         vl_spec: serde_json::Value,
-        vl_version: VlVersion,
+        vl_opts: VlOpts,
         scale: Option<f32>,
     ) -> Result<Vec<u8>, AnyError> {
         let scale = scale.unwrap_or(1.0);
-        let svg = self.vegalite_to_svg(vl_spec, vl_version).await?;
+        let svg = self.vegalite_to_svg(vl_spec, vl_opts).await?;
         Self::svg_to_png(&svg, scale)
     }
 
@@ -657,6 +733,27 @@ impl VlConverter {
             ),
         }
     }
+
+    pub async fn get_themes(&mut self) -> Result<serde_json::Value, AnyError> {
+        let (resp_tx, resp_rx) = oneshot::channel::<Result<serde_json::Value, AnyError>>();
+        let cmd = VlConvertCommand::GetThemes { responder: resp_tx };
+
+        // Send request
+        match self.sender.send(cmd).await {
+            Ok(_) => {
+                // All good
+            }
+            Err(err) => {
+                bail!("Failed to send get_themes request: {}", err.to_string())
+            }
+        }
+
+        // Wait for result
+        match resp_rx.await {
+            Ok(themes_result) => themes_result,
+            Err(err) => bail!("Failed to retrieve get_themes result: {}", err.to_string()),
+        }
+    }
 }
 
 impl Default for VlConverter {
@@ -684,7 +781,13 @@ mod tests {
         "##).unwrap();
 
         let vg_spec = ctx
-            .vegalite_to_vega(vl_spec, VlVersion::v4_17)
+            .vegalite_to_vega(
+                vl_spec,
+                VlOpts {
+                    vl_version: VlVersion::v4_17,
+                    ..Default::default()
+                },
+            )
             .await
             .unwrap();
         println!("vg_spec: {}", vg_spec)
@@ -705,14 +808,26 @@ mod tests {
 
         let mut ctx1 = VlConverter::new();
         let vg_spec1 = ctx1
-            .vegalite_to_vega(vl_spec.clone(), VlVersion::v4_17)
+            .vegalite_to_vega(
+                vl_spec.clone(),
+                VlOpts {
+                    vl_version: VlVersion::v4_17,
+                    ..Default::default()
+                },
+            )
             .await
             .unwrap();
         println!("vg_spec1: {}", vg_spec1);
 
         let mut ctx1 = VlConverter::new();
         let vg_spec2 = ctx1
-            .vegalite_to_vega(vl_spec, VlVersion::v5_5)
+            .vegalite_to_vega(
+                vl_spec,
+                VlOpts {
+                    vl_version: VlVersion::v5_5,
+                    ..Default::default()
+                },
+            )
             .await
             .unwrap();
         println!("vg_spec2: {}", vg_spec2);
diff --git a/vl-convert-rs/src/module_loader/import_map.rs b/vl-convert-rs/src/module_loader/import_map.rs
index b7d3e12a..3583729c 100644
--- a/vl-convert-rs/src/module_loader/import_map.rs
+++ b/vl-convert-rs/src/module_loader/import_map.rs
@@ -8,6 +8,8 @@ use std::str::FromStr;
 
 const SKYPACK_URL: &str = "https://cdn.skypack.dev";
 const VEGA_PATH: &str = "/pin/vega@v5.22.1-1GozmoxV3boOt3w4YuEn/mode=imports,min/optimized/vega.js";
+const VEGA_THEMES_PATH: &str =
+    "/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js";
 
 pub fn url_for_path(path: &str) -> String {
     format!("{}{}", SKYPACK_URL, path)
@@ -17,6 +19,10 @@ pub fn vega_url() -> String {
     url_for_path(VEGA_PATH)
 }
 
+pub fn vega_themes_url() -> String {
+    url_for_path(VEGA_THEMES_PATH)
+}
+
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 #[allow(non_camel_case_types)]
 pub enum VlVersion {
@@ -188,6 +194,7 @@ pub fn build_import_map() -> HashMap<String, String> {
     m.insert("/-/vega-selections@v5.4.0-zzF465zXstRQFfOBiACh/dist=es2020,mode=imports,min/optimized/vega-selections.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-selections@v5.4.0-zzF465zXstRQFfOBiACh/dist=es2020,mode=imports,min/optimized/vega-selections.js").to_string());
     m.insert("/-/vega-statistics@v1.7.10-LV9NsWqBJNud79RMDFen/dist=es2020,mode=imports,min/optimized/vega-statistics.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-statistics@v1.7.10-LV9NsWqBJNud79RMDFen/dist=es2020,mode=imports,min/optimized/vega-statistics.js").to_string());
     m.insert("/-/vega-statistics@v1.8.0-ffGE4n8RjawoHviWdqFQ/dist=es2020,mode=imports,min/optimized/vega-statistics.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-statistics@v1.8.0-ffGE4n8RjawoHviWdqFQ/dist=es2020,mode=imports,min/optimized/vega-statistics.js").to_string());
+    m.insert("/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js").to_string());
     m.insert("/-/vega-time@v2.0.4-Ylq8WGKplJoZYQPOPvwD/dist=es2020,mode=imports,min/optimized/vega-time.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-time@v2.0.4-Ylq8WGKplJoZYQPOPvwD/dist=es2020,mode=imports,min/optimized/vega-time.js").to_string());
     m.insert("/-/vega-time@v2.1.0-LVGYZzfDGZrYRhsP6b35/dist=es2020,mode=imports,min/optimized/vega-time.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-time@v2.1.0-LVGYZzfDGZrYRhsP6b35/dist=es2020,mode=imports,min/optimized/vega-time.js").to_string());
     m.insert("/-/vega-transforms@v4.10.0-6o4uSGsRGTT77VpisBF3/dist=es2020,mode=imports,min/optimized/vega-transforms.js".to_string(), include_str!("../../vendor/./cdn.skypack.dev/-/vega-transforms@v4.10.0-6o4uSGsRGTT77VpisBF3/dist=es2020,mode=imports,min/optimized/vega-transforms.js").to_string());
@@ -211,5 +218,6 @@ pub fn build_import_map() -> HashMap<String, String> {
     m.insert("/pin/vega-lite@v5.5.0-x3x9oTW9wvfyOekd4a63/mode=imports,min/optimized/vega-lite.js".to_string(), include_str!("../../vendor/cdn.skypack.dev/pin/vega-lite@v5.5.0-x3x9oTW9wvfyOekd4a63/mode=imports,min/optimized/vega-lite.js").to_string());
     m.insert("/pin/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/mode=imports,min/optimized/vega-lite.js".to_string(), include_str!("../../vendor/cdn.skypack.dev/pin/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/mode=imports,min/optimized/vega-lite.js").to_string());
     m.insert("/pin/vega@v5.22.1-1GozmoxV3boOt3w4YuEn/mode=imports,min/optimized/vega.js".to_string(), include_str!("../../vendor/cdn.skypack.dev/pin/vega@v5.22.1-1GozmoxV3boOt3w4YuEn/mode=imports,min/optimized/vega.js").to_string());
+    m.insert("/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js".to_string(), include_str!("../../vendor/cdn.skypack.dev/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js").to_string());
     m
 }
diff --git a/vl-convert-rs/thirdparty_rust.yaml b/vl-convert-rs/thirdparty_rust.yaml
index 68dcb37f..36feb09e 100644
--- a/vl-convert-rs/thirdparty_rust.yaml
+++ b/vl-convert-rs/thirdparty_rust.yaml
@@ -649,6 +649,22 @@ third_party_libraries:
         text: "Copyright (c) 2017 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. 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If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. 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+  - package_name: dirs
+    package_version: 4.0.0
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
+  - package_name: dirs-sys
+    package_version: 0.3.7
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
   - package_name: dlopen
     package_version: 0.1.8
     license: MIT
@@ -1907,6 +1923,12 @@ third_party_libraries:
     licenses:
       - license: MIT
         text: "Copyright (c) 2017 Redox OS Developers\n\nMIT License\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n\"Software\"), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\nNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\nLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\nWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
+  - package_name: redox_users
+    package_version: 0.4.3
+    license: MIT
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2017 Jose Narvaez\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n\n"
   - package_name: regex
     package_version: 1.6.0
     license: MIT OR Apache-2.0
@@ -2197,6 +2219,14 @@ third_party_libraries:
         text: "Copyright (c) 2006-2009 Graydon Hoare\nCopyright (c) 2009-2013 Mozilla Foundation\nCopyright (c) 2016 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
+  - package_name: shellexpand
+    package_version: 3.0.0
+    license: MIT/Apache-2.0
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2016 Vladimir Matveev\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. 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Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n\thttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
   - package_name: signal-hook-registry
     package_version: 1.4.0
     license: Apache-2.0/MIT
diff --git a/vl-convert-rs/vendor/cdn.skypack.dev/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js b/vl-convert-rs/vendor/cdn.skypack.dev/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js
new file mode 100644
index 00000000..78794ba7
--- /dev/null
+++ b/vl-convert-rs/vendor/cdn.skypack.dev/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js
@@ -0,0 +1,1 @@
+var Y="vega-themes",G="2.10.0",I="Themes for stylized Vega and Vega-Lite visualizations.",M=["vega","vega-lite","themes","style"],J="BSD-3-Clause",O={name:"UW Interactive Data Lab",url:"https://idl.cs.washington.edu"},U=[{name:"Emily Gu",url:"https://github.com/emilygu"},{name:"Arvind Satyanarayan",url:"http://arvindsatya.com"},{name:"Jeffrey Heer",url:"https://idl.cs.washington.edu"},{name:"Dominik Moritz",url:"https://www.domoritz.de"}],V="build/vega-themes.js",_="build/vega-themes.module.js",H="build/vega-themes.min.js",Q="build/vega-themes.min.js",R="build/vega-themes.module.d.ts",K={type:"git",url:"https://github.com/vega/vega-themes.git"},N=["src","build"],Z={prebuild:"yarn clean",build:"rollup -c",clean:"rimraf build && rimraf examples/build","copy:data":"rsync -r node_modules/vega-datasets/data/* examples/data","copy:build":"rsync -r build/* examples/build","deploy:gh":"yarn build && mkdir -p examples/build && rsync -r build/* examples/build && gh-pages -d examples",preversion:"yarn lint",serve:"browser-sync start -s -f build examples --serveStatic examples",start:"yarn build && concurrently --kill-others -n Server,Rollup 'yarn serve' 'rollup -c -w'",prepare:"beemo create-config",eslintbase:"beemo eslint .",format:"yarn eslintbase --fix",lint:"yarn eslintbase",release:"auto shipit"},ee={"@auto-it/conventional-commits":"^10.32.2","@auto-it/first-time-contributor":"^10.32.2","@rollup/plugin-json":"^4.1.0","@rollup/plugin-node-resolve":"^13.0.6","rollup-plugin-ts":"^1.4.7",auto:"^10.32.2","browser-sync":"^2.27.7",concurrently:"^6.4.0","gh-pages":"^3.2.3",rollup:"^2.60.0","rollup-plugin-bundle-size":"^1.0.3","rollup-plugin-terser":"^7.0.2",typescript:"^4.4.4",vega:"^5.19.1","vega-lite":"^5.0.0","vega-lite-dev-config":"^0.20.0"},te={vega:"*","vega-lite":"*"},oe={name:Y,version:G,description:I,keywords:M,license:J,author:O,contributors:U,main:V,module:_,unpkg:H,jsdelivr:Q,types:R,repository:K,files:N,scripts:Z,devDependencies:ee,peerDependencies:te};const d="#fff",le="#888",ie={background:"#333",title:{color:d,subtitleColor:d},style:{"guide-label":{fill:d},"guide-title":{fill:d}},axis:{domainColor:d,gridColor:le,tickColor:d}},o="#4572a7",ae={background:"#fff",arc:{fill:o},area:{fill:o},line:{stroke:o,strokeWidth:2},path:{stroke:o},rect:{fill:o},shape:{stroke:o},symbol:{fill:o,strokeWidth:1.5,size:50},axis:{bandPosition:.5,grid:!0,gridColor:"#000000",gridOpacity:1,gridWidth:.5,labelPadding:10,tickSize:5,tickWidth:.5},axisBand:{grid:!1,tickExtra:!0},legend:{labelBaseline:"middle",labelFontSize:11,symbolSize:50,symbolType:"square"},range:{category:["#4572a7","#aa4643","#8aa453","#71598e","#4598ae","#d98445","#94aace","#d09393","#b9cc98","#a99cbc"]}},l="#30a2da",h="#cbcbcb",re="#999",se="#333",y="#f0f0f0",v="#333",ne={arc:{fill:l},area:{fill:l},axis:{domainColor:h,grid:!0,gridColor:h,gridWidth:1,labelColor:re,labelFontSize:10,titleColor:se,tickColor:h,tickSize:10,titleFontSize:14,titlePadding:10,labelPadding:4},axisBand:{grid:!1},background:y,group:{fill:y},legend:{labelColor:v,labelFontSize:11,padding:1,symbolSize:30,symbolType:"square",titleColor:v,titleFontSize:14,titlePadding:10},line:{stroke:l,strokeWidth:2},path:{stroke:l,strokeWidth:.5},rect:{fill:l},range:{category:["#30a2da","#fc4f30","#e5ae38","#6d904f","#8b8b8b","#b96db8","#ff9e27","#56cc60","#52d2ca","#52689e","#545454","#9fe4f8"],diverging:["#cc0020","#e77866","#f6e7e1","#d6e8ed","#91bfd9","#1d78b5"],heatmap:["#d6e8ed","#cee0e5","#91bfd9","#549cc6","#1d78b5"]},point:{filled:!0,shape:"circle"},shape:{stroke:l},bar:{binSpacing:2,fill:l,stroke:null},title:{anchor:"start",fontSize:24,fontWeight:600,offset:20}},i="#000",de={group:{fill:"#e5e5e5"},arc:{fill:i},area:{fill:i},line:{stroke:i},path:{stroke:i},rect:{fill:i},shape:{stroke:i},symbol:{fill:i,size:40},axis:{domain:!1,grid:!0,gridColor:"#FFFFFF",gridOpacity:1,labelColor:"#7F7F7F",labelPadding:4,tickColor:"#7F7F7F",tickSize:5.67,titleFontSize:16,titleFontWeight:"normal"},legend:{labelBaseline:"middle",labelFontSize:11,symbolSize:40},range:{category:["#000000","#7F7F7F","#1A1A1A","#999999","#333333","#B0B0B0","#4D4D4D","#C9C9C9","#666666","#DCDCDC"]}},ce=22,fe="normal",z="Benton Gothic, sans-serif",D=11.5,ge="normal",a="#82c6df",C="Benton Gothic Bold, sans-serif",S="normal",x=13,c={"category-6":["#ec8431","#829eb1","#c89d29","#3580b1","#adc839","#ab7fb4"],"fire-7":["#fbf2c7","#f9e39c","#f8d36e","#f4bb6a","#e68a4f","#d15a40","#ab4232"],"fireandice-6":["#e68a4f","#f4bb6a","#f9e39c","#dadfe2","#a6b7c6","#849eae"],"ice-7":["#edefee","#dadfe2","#c4ccd2","#a6b7c6","#849eae","#607785","#47525d"]},be={background:"#ffffff",title:{anchor:"start",color:"#000000",font:C,fontSize:ce,fontWeight:fe},arc:{fill:a},area:{fill:a},line:{stroke:a,strokeWidth:2},path:{stroke:a},rect:{fill:a},shape:{stroke:a},symbol:{fill:a,size:30},axis:{labelFont:z,labelFontSize:D,labelFontWeight:ge,titleFont:C,titleFontSize:x,titleFontWeight:S},axisX:{labelAngle:0,labelPadding:4,tickSize:3},axisY:{labelBaseline:"middle",maxExtent:45,minExtent:45,tickSize:2,titleAlign:"left",titleAngle:0,titleX:-45,titleY:-11},legend:{labelFont:z,labelFontSize:D,symbolType:"square",titleFont:C,titleFontSize:x,titleFontWeight:S},range:{category:c["category-6"],diverging:c["fireandice-6"],heatmap:c["fire-7"],ordinal:c["fire-7"],ramp:c["fire-7"]}},r="#ab5787",u="#979797",ue={background:"#f9f9f9",arc:{fill:r},area:{fill:r},line:{stroke:r},path:{stroke:r},rect:{fill:r},shape:{stroke:r},symbol:{fill:r,size:30},axis:{domainColor:u,domainWidth:.5,gridWidth:.2,labelColor:u,tickColor:u,tickWidth:.2,titleColor:u},axisBand:{grid:!1},axisX:{grid:!0,tickSize:10},axisY:{domain:!1,grid:!0,tickSize:0},legend:{labelFontSize:11,padding:1,symbolSize:30,symbolType:"square"},range:{category:["#ab5787","#51b2e5","#703c5c","#168dd9","#d190b6","#00609f","#d365ba","#154866","#666666","#c4c4c4"]}},s="#3e5c69",pe={background:"#fff",arc:{fill:s},area:{fill:s},line:{stroke:s},path:{stroke:s},rect:{fill:s},shape:{stroke:s},symbol:{fill:s},axis:{domainWidth:.5,grid:!0,labelPadding:2,tickSize:5,tickWidth:.5,titleFontWeight:"normal"},axisBand:{grid:!1},axisX:{gridWidth:.2},axisY:{gridDash:[3],gridWidth:.4},legend:{labelFontSize:11,padding:1,symbolType:"square"},range:{category:["#3e5c69","#6793a6","#182429","#0570b0","#3690c0","#74a9cf","#a6bddb","#e2ddf2"]}},e="#1696d2",B="#000000",me="#FFFFFF",p="Lato",F="Lato",he="Lato",Ce="#DEDDDD",Fe=18,f={"main-colors":["#1696d2","#d2d2d2","#000000","#fdbf11","#ec008b","#55b748","#5c5859","#db2b27"],"shades-blue":["#CFE8F3","#A2D4EC","#73BFE2","#46ABDB","#1696D2","#12719E","#0A4C6A","#062635"],"shades-gray":["#F5F5F5","#ECECEC","#E3E3E3","#DCDBDB","#D2D2D2","#9D9D9D","#696969","#353535"],"shades-yellow":["#FFF2CF","#FCE39E","#FDD870","#FCCB41","#FDBF11","#E88E2D","#CA5800","#843215"],"shades-magenta":["#F5CBDF","#EB99C2","#E46AA7","#E54096","#EC008B","#AF1F6B","#761548","#351123"],"shades-green":["#DCEDD9","#BCDEB4","#98CF90","#78C26D","#55B748","#408941","#2C5C2D","#1A2E19"],"shades-black":["#D5D5D4","#ADABAC","#848081","#5C5859","#332D2F","#262223","#1A1717","#0E0C0D"],"shades-red":["#F8D5D4","#F1AAA9","#E9807D","#E25552","#DB2B27","#A4201D","#6E1614","#370B0A"],"one-group":["#1696d2","#000000"],"two-groups-cat-1":["#1696d2","#000000"],"two-groups-cat-2":["#1696d2","#fdbf11"],"two-groups-cat-3":["#1696d2","#db2b27"],"two-groups-seq":["#a2d4ec","#1696d2"],"three-groups-cat":["#1696d2","#fdbf11","#000000"],"three-groups-seq":["#a2d4ec","#1696d2","#0a4c6a"],"four-groups-cat-1":["#000000","#d2d2d2","#fdbf11","#1696d2"],"four-groups-cat-2":["#1696d2","#ec0008b","#fdbf11","#5c5859"],"four-groups-seq":["#cfe8f3","#73bf42","#1696d2","#0a4c6a"],"five-groups-cat-1":["#1696d2","#fdbf11","#d2d2d2","#ec008b","#000000"],"five-groups-cat-2":["#1696d2","#0a4c6a","#d2d2d2","#fdbf11","#332d2f"],"five-groups-seq":["#cfe8f3","#73bf42","#1696d2","#0a4c6a","#000000"],"six-groups-cat-1":["#1696d2","#ec008b","#fdbf11","#000000","#d2d2d2","#55b748"],"six-groups-cat-2":["#1696d2","#d2d2d2","#ec008b","#fdbf11","#332d2f","#0a4c6a"],"six-groups-seq":["#cfe8f3","#a2d4ec","#73bfe2","#46abdb","#1696d2","#12719e"],"diverging-colors":["#ca5800","#fdbf11","#fdd870","#fff2cf","#cfe8f3","#73bfe2","#1696d2","#0a4c6a"]},ke={background:me,title:{anchor:"start",fontSize:Fe,font:p},axisX:{domain:!0,domainColor:B,domainWidth:1,grid:!1,labelFontSize:12,labelFont:F,labelAngle:0,tickColor:B,tickSize:5,titleFontSize:12,titlePadding:10,titleFont:p},axisY:{domain:!1,domainWidth:1,grid:!0,gridColor:Ce,gridWidth:1,labelFontSize:12,labelFont:F,labelPadding:8,ticks:!1,titleFontSize:12,titlePadding:10,titleFont:p,titleAngle:0,titleY:-10,titleX:18},legend:{labelFontSize:12,labelFont:F,symbolSize:100,titleFontSize:12,titlePadding:10,titleFont:p,orient:"right",offset:10},view:{stroke:"transparent"},range:{category:f["six-groups-cat-1"],diverging:f["diverging-colors"],heatmap:f["diverging-colors"],ordinal:f["six-groups-seq"],ramp:f["shades-blue"]},area:{fill:e},rect:{fill:e},line:{color:e,stroke:e,strokeWidth:5},trail:{color:e,stroke:e,strokeWidth:0,size:1},path:{stroke:e,strokeWidth:.5},point:{filled:!0},text:{font:he,color:e,fontSize:11,align:"center",fontWeight:400,size:11},style:{bar:{fill:e,stroke:null}},arc:{fill:e},shape:{stroke:e},symbol:{fill:e,size:30}},n="#3366CC",E="#ccc",m="Arial, sans-serif",ye={arc:{fill:n},area:{fill:n},path:{stroke:n},rect:{fill:n},shape:{stroke:n},symbol:{stroke:n},circle:{fill:n},background:"#fff",padding:{top:10,right:10,bottom:10,left:10},style:{"guide-label":{font:m,fontSize:12},"guide-title":{font:m,fontSize:12},"group-title":{font:m,fontSize:12}},title:{font:m,fontSize:14,fontWeight:"bold",dy:-3,anchor:"start"},axis:{gridColor:E,tickColor:E,domain:!1,grid:!0},range:{category:["#4285F4","#DB4437","#F4B400","#0F9D58","#AB47BC","#00ACC1","#FF7043","#9E9D24","#5C6BC0","#F06292","#00796B","#C2185B"],heatmap:["#c6dafc","#5e97f6","#2a56c6"]}},k=X=>X*(1/3+1),W=k(9),A=k(10),T=k(12),g="Segoe UI",w="wf_standard-font, helvetica, arial, sans-serif",P="#252423",b="#605E5C",$="transparent",ve="#C8C6C4",t="#118DFF",ze="#12239E",De="#E66C37",Se="#6B007B",xe="#E044A7",Be="#744EC2",Ee="#D9B300",We="#D64550",q=t,L="#DEEFFF",j=[L,q],Ae=[L,"#c7e4ff","#b0d9ff","#9aceff","#83c3ff","#6cb9ff","#55aeff","#3fa3ff","#2898ff",q],Te={view:{stroke:$},background:$,font:g,header:{titleFont:w,titleFontSize:T,titleColor:P,labelFont:g,labelFontSize:A,labelColor:b},axis:{ticks:!1,grid:!1,domain:!1,labelColor:b,labelFontSize:W,titleFont:w,titleColor:P,titleFontSize:T,titleFontWeight:"normal"},axisQuantitative:{tickCount:3,grid:!0,gridColor:ve,gridDash:[1,5],labelFlush:!1},axisBand:{tickExtra:!0},axisX:{labelPadding:5},axisY:{labelPadding:10},bar:{fill:t},line:{stroke:t,strokeWidth:3,strokeCap:"round",strokeJoin:"round"},text:{font:g,fontSize:W,fill:b},arc:{fill:t},area:{fill:t,line:!0,opacity:.6},path:{stroke:t},rect:{fill:t},point:{fill:t,filled:!0,size:75},shape:{stroke:t},symbol:{fill:t,strokeWidth:1.5,size:50},legend:{titleFont:g,titleFontWeight:"bold",titleColor:b,labelFont:g,labelFontSize:A,labelColor:b,symbolType:"circle",symbolSize:75},range:{category:[t,ze,De,Se,xe,Be,Ee,We],diverging:j,heatmap:j,ordinal:Ae}},we=oe.version;export{ie as dark,ae as excel,ne as fivethirtyeight,de as ggplot2,ye as googlecharts,be as latimes,Te as powerbi,ue as quartz,ke as urbaninstitute,we as version,pe as vox};export default null;
diff --git a/vl-convert-rs/vendor/cdn.skypack.dev/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js b/vl-convert-rs/vendor/cdn.skypack.dev/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js
new file mode 100644
index 00000000..ac8f2837
--- /dev/null
+++ b/vl-convert-rs/vendor/cdn.skypack.dev/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js
@@ -0,0 +1,7 @@
+/*
+ * Skypack CDN - vega-themes@2.12.0
+ * Remove "min" from url for additional help & instructions.
+ */
+
+export * from '/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js';
+export {default} from '/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js';
diff --git a/vl-convert-rs/vendor/import_map.json b/vl-convert-rs/vendor/import_map.json
index 58ca0ee3..341a8a6c 100644
--- a/vl-convert-rs/vendor/import_map.json
+++ b/vl-convert-rs/vendor/import_map.json
@@ -117,7 +117,8 @@
       "/-/vega-lite@v5.3.0-dnS8FsGfJPn0FoksPhAq/dist=es2020,mode=imports,min/optimized/vega-lite.js": "./cdn.skypack.dev/-/vega-lite@v5.3.0-dnS8FsGfJPn0FoksPhAq/dist=es2020,mode=imports,min/optimized/vega-lite.js",
       "/-/vega-lite@v5.4.0-9xYSqs414yDb6NHwONaK/dist=es2020,mode=imports,min/optimized/vega-lite.js": "./cdn.skypack.dev/-/vega-lite@v5.4.0-9xYSqs414yDb6NHwONaK/dist=es2020,mode=imports,min/optimized/vega-lite.js",
       "/-/vega-lite@v5.5.0-x3x9oTW9wvfyOekd4a63/dist=es2020,mode=imports,min/optimized/vega-lite.js": "./cdn.skypack.dev/-/vega-lite@v5.5.0-x3x9oTW9wvfyOekd4a63/dist=es2020,mode=imports,min/optimized/vega-lite.js",
-      "/-/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/dist=es2020,mode=imports,min/optimized/vega-lite.js": "./cdn.skypack.dev/-/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/dist=es2020,mode=imports,min/optimized/vega-lite.js"
+      "/-/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/dist=es2020,mode=imports,min/optimized/vega-lite.js": "./cdn.skypack.dev/-/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/dist=es2020,mode=imports,min/optimized/vega-lite.js",
+      "/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js": "./cdn.skypack.dev/-/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/dist=es2020,mode=imports,min/optimized/vega-themes.js"
     }
   }
 }
diff --git a/vl-convert-rs/vendor_imports.js b/vl-convert-rs/vendor_imports.js
index 47a4c8aa..0b8928a3 100644
--- a/vl-convert-rs/vendor_imports.js
+++ b/vl-convert-rs/vendor_imports.js
@@ -7,3 +7,4 @@ import * as v_5_4 from "https://cdn.skypack.dev/pin/vega-lite@v5.4.0-9xYSqs414yD
 import * as v_5_5 from "https://cdn.skypack.dev/pin/vega-lite@v5.5.0-x3x9oTW9wvfyOekd4a63/mode=imports,min/optimized/vega-lite.js";
 import * as v_5_6 from "https://cdn.skypack.dev/pin/vega-lite@v5.6.0-jKfgpjSz6Y52Dxyq2kpj/mode=imports,min/optimized/vega-lite.js";
 import * as vega from "https://cdn.skypack.dev/pin/vega@v5.22.1-1GozmoxV3boOt3w4YuEn/mode=imports,min/optimized/vega.js";
+import * as vegaThemes from "https://cdn.skypack.dev/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js";
diff --git a/vl-convert-vendor/src/main.rs b/vl-convert-vendor/src/main.rs
index 3051ee97..3a6d1b8f 100644
--- a/vl-convert-vendor/src/main.rs
+++ b/vl-convert-vendor/src/main.rs
@@ -39,6 +39,8 @@ const VL_PATHS: &[(&str, &str)] = &[
 ];
 const SKYPACK_URL: &str = "https://cdn.skypack.dev";
 const VEGA_PATH: &str = "/pin/vega@v5.22.1-1GozmoxV3boOt3w4YuEn/mode=imports,min/optimized/vega.js";
+const VEGA_THEMES_PATH: &str =
+    "/pin/vega-themes@v2.12.0-jAdjfWJImDLk7A9LyR4u/mode=imports,min/optimized/vega-themes.js";
 
 // Example custom build script.
 fn main() {
@@ -54,6 +56,8 @@ fn main() {
     let importsjs_path = vl_convert_rs_path.join("vendor_imports.js");
 
     let mut imports = String::new();
+
+    // Write Vega-Lite
     for (ver, path) in VL_PATHS {
         let ver_under = ver.replace('.', "_");
         writeln!(
@@ -65,6 +69,8 @@ fn main() {
         )
         .unwrap();
     }
+
+    // Write Vega
     writeln!(
         imports,
         "import * as vega from \"{SKYPACK_URL}{VEGA_PATH}\";",
@@ -72,6 +78,16 @@ fn main() {
         VEGA_PATH = VEGA_PATH
     )
     .unwrap();
+
+    // Write VegaThemes
+    writeln!(
+        imports,
+        "import * as vegaThemes from \"{SKYPACK_URL}{VEGA_THEMES_PATH}\";",
+        SKYPACK_URL = SKYPACK_URL,
+        VEGA_THEMES_PATH = VEGA_THEMES_PATH
+    )
+    .unwrap();
+
     fs::write(importsjs_path, imports).expect("Failed to write vendor_imports.js");
 
     // Use deno vendor to download vega-lite and dependencies to the vendor directory
@@ -149,6 +165,7 @@ use deno_runtime::deno_core::error::AnyError;
 
 const SKYPACK_URL: &str = "{SKYPACK_URL}";
 const VEGA_PATH: &str = "{VEGA_PATH}";
+const VEGA_THEMES_PATH: &str = "{VEGA_THEMES_PATH}";
 
 pub fn url_for_path(path: &str) -> String {{
     format!("{{}}{{}}", SKYPACK_URL, path)
@@ -158,6 +175,10 @@ pub fn vega_url() -> String {{
     url_for_path(VEGA_PATH)
 }}
 
+pub fn vega_themes_url() -> String {{
+    url_for_path(VEGA_THEMES_PATH)
+}}
+
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 #[allow(non_camel_case_types)]
 pub enum VlVersion {{
@@ -208,6 +229,7 @@ pub fn build_import_map() -> HashMap<String, String> {{
         version_instances_csv = version_instances_csv,
         SKYPACK_URL = SKYPACK_URL,
         VEGA_PATH = VEGA_PATH,
+        VEGA_THEMES_PATH = VEGA_THEMES_PATH,
         LATEST_VEGALITE = VL_PATHS[VL_PATHS.len() - 1].0
     );
     // Add packages
@@ -230,12 +252,21 @@ pub fn build_import_map() -> HashMap<String, String> {{
             vl_path=vl_path,
         ).unwrap();
     }
+
+    // Vega
     writeln!(
         content,
         "    m.insert(\"{VEGA_PATH}\".to_string(), include_str!(\"../../vendor/cdn.skypack.dev{VEGA_PATH}\").to_string());",
         VEGA_PATH=VEGA_PATH,
     ).unwrap();
 
+    // Vega Themes
+    writeln!(
+        content,
+        "    m.insert(\"{VEGA_THEMES_PATH}\".to_string(), include_str!(\"../../vendor/cdn.skypack.dev{VEGA_THEMES_PATH}\").to_string());",
+        VEGA_THEMES_PATH=VEGA_THEMES_PATH,
+    ).unwrap();
+
     content.push_str("    m\n}\n");
 
     // Write to import_map.rs in vl-convert-rs crate
diff --git a/vl-convert/Cargo.toml b/vl-convert/Cargo.toml
index a7ed90ba..fa5980aa 100644
--- a/vl-convert/Cargo.toml
+++ b/vl-convert/Cargo.toml
@@ -16,8 +16,11 @@ vl-convert-rs = {path= "../vl-convert-rs", version= "0.6.0" }
 tokio = {version="1.21", features=["macros", "rt-multi-thread"]}
 serde_json = "1.0.85"
 clap = {version="4.0.6", features=["derive"]}
+shellexpand = "3.0.0"
+itertools = "0.10.5"
 
 [dev-dependencies]
 assert_cmd = "2.0"
 predicates = "2.1"
 rstest = "0.16.0"
+tempfile = "3.3.0"
diff --git a/vl-convert/README.md b/vl-convert/README.md
index cf99afdc..cded5abe 100644
--- a/vl-convert/README.md
+++ b/vl-convert/README.md
@@ -17,12 +17,14 @@ vl-convert: A utility for converting Vega-Lite specifications
 Usage: vl-convert <COMMAND>
 
 Commands:
-  vl2vg   Convert a Vega-Lite specification to a Vega specification
-  vl2svg  Convert a Vega-Lite specification to an SVG image
-  vl2png  Convert a Vega-Lite specification to an PNG image
-  vg2svg  Convert a Vega specification to an SVG image
-  vg2png  Convert a Vega specification to an PNG image
-  help    Print this message or the help of the given subcommand(s)
+  vl2vg      Convert a Vega-Lite specification to a Vega specification
+  vl2svg     Convert a Vega-Lite specification to an SVG image
+  vl2png     Convert a Vega-Lite specification to an PNG image
+  vg2svg     Convert a Vega specification to an SVG image
+  vg2png     Convert a Vega specification to an PNG image
+  ls-themes  List available themes
+  cat-theme  Print the config JSON for a theme
+  help       Print this message or the help of the given subcommand(s)
 
 Options:
   -h, --help     Print help information
@@ -43,7 +45,9 @@ Usage: vl-convert vl2vg [OPTIONS] --input <INPUT> --output <OUTPUT>
 Options:
   -i, --input <INPUT>            Path to input Vega-Lite file
   -o, --output <OUTPUT>          Path to output Vega file to be created
-  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5 [default: 5.5]
+  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6 [default: 5.6]
+  -t, --theme <THEME>            Named theme provided by the vegaThemes package (e.g. "dark")
+  -c, --config <CONFIG>          Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
   -p, --pretty                   Pretty-print JSON in output file
   -h, --help                     Print help information
 ```
@@ -67,14 +71,17 @@ Usage: vl-convert vl2svg [OPTIONS] --input <INPUT> --output <OUTPUT>
 Options:
   -i, --input <INPUT>            Path to input Vega-Lite file
   -o, --output <OUTPUT>          Path to output SVG file to be created
-  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5 [default: 5.5]
+  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6 [default: 5.6]
+  -t, --theme <THEME>            Named theme provided by the vegaThemes package (e.g. "dark")
+  -c, --config <CONFIG>          Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
+      --font-dir <FONT_DIR>      Additional directory to search for fonts
   -h, --help                     Print help information
 ```
 
-For example, convert a Vega-Lite specification file named `in.vl.json` into an SVG file named `out.svg`. Perform the conversion using version 5.5 of the Vega-Lite JavaScript library.
+For example, convert a Vega-Lite specification file named `in.vl.json` into an SVG file named `out.svg`. Perform the conversion using version 5.5 of the Vega-Lite JavaScript library, and apply the `dark` theme (available themes available with the `ls-themes` subcommand below).
 
 ```plain
-$ vl-convert vl2svg -i ./in.vl.json -o ./out.svg --vl-version 5.5
+$ vl-convert vl2svg -i ./in.vl.json -o ./out.svg --vl-version 5.5 --theme dark
 ```
 
 ### vl2png
@@ -90,15 +97,18 @@ Usage: vl-convert vl2png [OPTIONS] --input <INPUT> --output <OUTPUT>
 Options:
   -i, --input <INPUT>            Path to input Vega-Lite file
   -o, --output <OUTPUT>          Path to output PNG file to be created
-  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5 [default: 5.5]
+  -v, --vl-version <VL_VERSION>  Vega-Lite Version. One of 4.17, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6 [default: 5.6]
+  -t, --theme <THEME>            Named theme provided by the vegaThemes package (e.g. "dark")
+  -c, --config <CONFIG>          Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
   -s, --scale <SCALE>            Image scale factor [default: 1.0]
+      --font-dir <FONT_DIR>      Additional directory to search for fonts
   -h, --help                     Print help information
 ```
 
-For example, convert a Vega-Lite specification file named `in.vl.json` into a PNG file named `out.png` with a scale factor of 2. Perform the conversion using version 5.5 of the Vega-Lite JavaScript library.
+For example, convert a Vega-Lite specification file named `in.vl.json` into a PNG file named `out.png` with a scale factor of 2. Perform the conversion using version 5.5 of the Vega-Lite JavaScript library, and apply the [config](https://vega.github.io/vega/docs/config/) file located at `~/my-config.json`.
 
 ```plain
-$ vl-convert vl2png -i ./in.vl.json -o ./out.png --vl-version 5.5 --scale 2
+$ vl-convert vl2png -i ./in.vl.json -o ./out.png --vl-version 5.5 --scale 2 --config ~/my-config.json
 ```
 
 ### vg2svg
@@ -143,3 +153,76 @@ For example, convert a Vega specification file named `in.vg.json` into a PNG fil
 ```plain
 $ vl-convert vg2png -i ./in.vg.json -o ./out.png --scale 2
 ```
+
+### ls-themes
+```
+$ vl-convert ls-themes --help
+
+List available themes
+
+Usage: vl-convert ls-themes
+
+Options:
+  -h, --help  Print help information
+```
+
+Here is an example of listing the names of all available built-in themes.
+```
+$ vl-convert ls-themes
+
+dark
+excel
+fivethirtyeight
+ggplot2
+googlecharts
+latimes
+powerbi
+quartz
+urbaninstitute
+vox
+```
+
+### cat-theme
+```
+$ vl-convert cat-theme --help
+
+Print the config JSON for a theme
+
+Usage: vl-convert cat-theme <THEME>
+
+Arguments:
+  <THEME>  Name of a theme
+
+Options:
+  -h, --help  Print help information
+```
+
+For example, print the config JSON associated with the built-in `dark` theme
+
+```
+$ vl-convert cat-theme dark
+
+{
+  "background": "#333",
+  "title": {
+    "color": "#fff",
+    "subtitleColor": "#fff"
+  },
+  "style": {
+    "guide-label": {
+      "fill": "#fff"
+    },
+    "guide-title": {
+      "fill": "#fff"
+    }
+  },
+  "axis": {
+    "domainColor": "#fff",
+    "gridColor": "#888",
+    "tickColor": "#fff"
+  }
+}
+```
+
+## User-level config file
+If a file exists at `~/.config/vl-convert/config.json`, `vl-convert` will use this path as the default value of the `--config` flag across all subcommands.
diff --git a/vl-convert/src/main.rs b/vl-convert/src/main.rs
index 39497ffb..b6f9c531 100644
--- a/vl-convert/src/main.rs
+++ b/vl-convert/src/main.rs
@@ -1,13 +1,16 @@
 #![doc = include_str!("../README.md")]
 
 use clap::{arg, Parser, Subcommand};
+use itertools::Itertools;
+use std::path::Path;
 use std::str::FromStr;
-use vl_convert_rs::converter::VlConverter;
+use vl_convert_rs::converter::{VlConverter, VlOpts};
 use vl_convert_rs::module_loader::import_map::VlVersion;
 use vl_convert_rs::text::register_font_directory;
 use vl_convert_rs::{anyhow, anyhow::bail};
 
 const DEFAULT_VL_VERSION: &str = "5.6";
+const DEFAULT_CONFIG_PATH: &str = "~/.config/vl-convert/config.json";
 
 #[derive(Debug, Parser)] // requires `derive` feature
 #[command(version, name = "vl-convert")]
@@ -34,6 +37,14 @@ enum Commands {
         #[arg(short, long, default_value = DEFAULT_VL_VERSION)]
         vl_version: String,
 
+        /// Named theme provided by the vegaThemes package (e.g. "dark")
+        #[arg(short, long)]
+        theme: Option<String>,
+
+        /// Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
+        #[arg(short, long)]
+        config: Option<String>,
+
         /// Pretty-print JSON in output file
         #[arg(short, long)]
         pretty: bool,
@@ -54,6 +65,14 @@ enum Commands {
         #[arg(short, long, default_value = DEFAULT_VL_VERSION)]
         vl_version: String,
 
+        /// Named theme provided by the vegaThemes package (e.g. "dark")
+        #[arg(short, long)]
+        theme: Option<String>,
+
+        /// Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
+        #[arg(short, long)]
+        config: Option<String>,
+
         /// Additional directory to search for fonts
         #[arg(long)]
         font_dir: Option<String>,
@@ -74,6 +93,14 @@ enum Commands {
         #[arg(short, long, default_value = DEFAULT_VL_VERSION)]
         vl_version: String,
 
+        /// Named theme provided by the vegaThemes package (e.g. "dark")
+        #[arg(short, long)]
+        theme: Option<String>,
+
+        /// Path to Vega-Lite config file. Defaults to ~/.config/vl-convert/config.json
+        #[arg(short, long)]
+        config: Option<String>,
+
         /// Image scale factor
         #[arg(short, long, default_value = "1.0")]
         scale: f32,
@@ -118,6 +145,16 @@ enum Commands {
         #[arg(long)]
         font_dir: Option<String>,
     },
+
+    /// List available themes
+    LsThemes,
+
+    /// Print the config JSON for a theme
+    #[command(arg_required_else_help = true)]
+    CatTheme {
+        /// Name of a theme
+        theme: String,
+    },
 }
 
 #[tokio::main]
@@ -129,26 +166,42 @@ async fn main() -> Result<(), anyhow::Error> {
             input: input_vegalite_file,
             output: output_vega_file,
             vl_version,
+            theme,
+            config,
             pretty,
-        } => vl_2_vg(&input_vegalite_file, &output_vega_file, &vl_version, pretty).await?,
+        } => {
+            vl_2_vg(
+                &input_vegalite_file,
+                &output_vega_file,
+                &vl_version,
+                theme,
+                config,
+                pretty,
+            )
+            .await?
+        }
         Vl2svg {
             input,
             output,
             vl_version,
+            theme,
+            config,
             font_dir,
         } => {
             register_font_dir(font_dir)?;
-            vl_2_svg(&input, &output, &vl_version).await?
+            vl_2_svg(&input, &output, &vl_version, theme, config).await?
         }
         Vl2png {
             input,
             output,
             vl_version,
+            theme,
+            config,
             scale,
             font_dir,
         } => {
             register_font_dir(font_dir)?;
-            vl_2_png(&input, &output, &vl_version, scale).await?
+            vl_2_png(&input, &output, &vl_version, theme, config, scale).await?
         }
         Vg2svg {
             input,
@@ -167,6 +220,8 @@ async fn main() -> Result<(), anyhow::Error> {
             register_font_dir(font_dir)?;
             vg_2_png(&input, &output, scale).await?
         }
+        LsThemes => list_themes().await?,
+        CatTheme { theme } => cat_theme(&theme).await?,
     }
 
     Ok(())
@@ -223,10 +278,43 @@ fn write_output_binary(output: &str, output_data: &[u8]) -> Result<(), anyhow::E
     }
 }
 
+fn normalize_config_path(config: Option<String>) -> Option<String> {
+    match config {
+        Some(config) => Some(shellexpand::tilde(config.trim()).to_string()),
+        None => {
+            let default_path = shellexpand::tilde(DEFAULT_CONFIG_PATH).to_string();
+            if Path::new(&default_path).exists() {
+                Some(default_path)
+            } else {
+                None
+            }
+        }
+    }
+}
+
+fn read_config_json(config: Option<String>) -> Result<Option<serde_json::Value>, anyhow::Error> {
+    let config = normalize_config_path(config);
+    match config {
+        None => Ok(None),
+        Some(config) => {
+            let config_str = match std::fs::read_to_string(&config) {
+                Ok(config_str) => config_str,
+                Err(err) => {
+                    bail!("Failed to read config file: {}\n{}", config, err);
+                }
+            };
+            let config_json: serde_json::Value = serde_json::from_str(&config_str)?;
+            Ok(Some(config_json))
+        }
+    }
+}
+
 async fn vl_2_vg(
     input: &str,
     output: &str,
     vl_version: &str,
+    theme: Option<String>,
+    config: Option<String>,
     pretty: bool,
 ) -> Result<(), anyhow::Error> {
     // Parse version
@@ -238,11 +326,24 @@ async fn vl_2_vg(
     // Parse input as json
     let vegalite_json = parse_as_json(&vegalite_str)?;
 
+    // Load config from file
+    let config = read_config_json(config)?;
+
     // Initialize converter
     let mut converter = VlConverter::new();
 
     // Perform conversion
-    let vega_json = match converter.vegalite_to_vega(vegalite_json, vl_version).await {
+    let vega_json = match converter
+        .vegalite_to_vega(
+            vegalite_json,
+            VlOpts {
+                vl_version,
+                theme,
+                config,
+            },
+        )
+        .await
+    {
         Ok(vega_str) => vega_str,
         Err(err) => {
             bail!("Vega-Lite to Vega conversion failed: {}", err);
@@ -317,7 +418,13 @@ async fn vg_2_png(input: &str, output: &str, scale: f32) -> Result<(), anyhow::E
     Ok(())
 }
 
-async fn vl_2_svg(input: &str, output: &str, vl_version: &str) -> Result<(), anyhow::Error> {
+async fn vl_2_svg(
+    input: &str,
+    output: &str,
+    vl_version: &str,
+    theme: Option<String>,
+    config: Option<String>,
+) -> Result<(), anyhow::Error> {
     // Parse version
     let vl_version = parse_vl_version(vl_version)?;
 
@@ -327,11 +434,24 @@ async fn vl_2_svg(input: &str, output: &str, vl_version: &str) -> Result<(), any
     // Parse input as json
     let vl_spec = parse_as_json(&vegalite_str)?;
 
+    // Load config from file
+    let config = read_config_json(config)?;
+
     // Initialize converter
     let mut converter = VlConverter::new();
 
     // Perform conversion
-    let svg = match converter.vegalite_to_svg(vl_spec, vl_version).await {
+    let svg = match converter
+        .vegalite_to_svg(
+            vl_spec,
+            VlOpts {
+                vl_version,
+                config,
+                theme,
+            },
+        )
+        .await
+    {
         Ok(svg) => svg,
         Err(err) => {
             bail!("Vega-Lite to Vega conversion failed: {}", err);
@@ -348,6 +468,8 @@ async fn vl_2_png(
     input: &str,
     output: &str,
     vl_version: &str,
+    theme: Option<String>,
+    config: Option<String>,
     scale: f32,
 ) -> Result<(), anyhow::Error> {
     // Parse version
@@ -359,12 +481,23 @@ async fn vl_2_png(
     // Parse input as json
     let vl_spec = parse_as_json(&vegalite_str)?;
 
+    // Load config from file
+    let config = read_config_json(config)?;
+
     // Initialize converter
     let mut converter = VlConverter::new();
 
     // Perform conversion
     let png_data = match converter
-        .vegalite_to_png(vl_spec, vl_version, Some(scale))
+        .vegalite_to_png(
+            vl_spec,
+            VlOpts {
+                vl_version,
+                config,
+                theme,
+            },
+            Some(scale),
+        )
         .await
     {
         Ok(png_data) => png_data,
@@ -378,3 +511,35 @@ async fn vl_2_png(
 
     Ok(())
 }
+
+async fn list_themes() -> Result<(), anyhow::Error> {
+    // Initialize converter
+    let mut converter = VlConverter::new();
+
+    if let serde_json::Value::Object(themes) = converter.get_themes().await? {
+        for theme in themes.keys().sorted() {
+            println!("{}", theme)
+        }
+    } else {
+        bail!("Failed to load themes")
+    }
+
+    Ok(())
+}
+
+async fn cat_theme(theme: &str) -> Result<(), anyhow::Error> {
+    // Initialize converter
+    let mut converter = VlConverter::new();
+
+    if let serde_json::Value::Object(themes) = converter.get_themes().await? {
+        if let Some(theme_config) = themes.get(theme) {
+            let theme_config_str = serde_json::to_string_pretty(theme_config).unwrap();
+            println!("{}", theme_config_str);
+        } else {
+            bail!("No theme named '{}'", theme)
+        }
+    } else {
+        bail!("Failed to load themes")
+    }
+    Ok(())
+}
diff --git a/vl-convert/thirdparty_rust.yaml b/vl-convert/thirdparty_rust.yaml
index 68dcb37f..36feb09e 100644
--- a/vl-convert/thirdparty_rust.yaml
+++ b/vl-convert/thirdparty_rust.yaml
@@ -649,6 +649,22 @@ third_party_libraries:
         text: "Copyright (c) 2017 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
+  - package_name: dirs
+    package_version: 4.0.0
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
+  - package_name: dirs-sys
+    package_version: 0.3.7
+    license: MIT OR Apache-2.0
+    licenses:
+      - license: MIT
+        text: "Copyright (c) 2018-2019 dirs-rs contributors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n"
   - package_name: dlopen
     package_version: 0.1.8
     license: MIT
@@ -1907,6 +1923,12 @@ third_party_libraries:
     licenses:
       - license: MIT
         text: "Copyright (c) 2017 Redox OS Developers\n\nMIT License\n\nPermission is hereby granted, free of charge, to any person obtaining\na copy of this software and associated documentation files (the\n\"Software\"), to deal in the Software without restriction, including\nwithout limitation the rights to use, copy, modify, merge, publish,\ndistribute, sublicense, and/or sell copies of the Software, and to\npermit persons to whom the Software is furnished to do so, subject to\nthe following conditions:\n\nThe above copyright notice and this permission notice shall be\nincluded in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\nNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\nLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\nWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
+  - package_name: redox_users
+    package_version: 0.4.3
+    license: MIT
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2017 Jose Narvaez\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n\n"
   - package_name: regex
     package_version: 1.6.0
     license: MIT OR Apache-2.0
@@ -2197,6 +2219,14 @@ third_party_libraries:
         text: "Copyright (c) 2006-2009 Graydon Hoare\nCopyright (c) 2009-2013 Mozilla Foundation\nCopyright (c) 2016 Artyom Pavlov\n\nPermission is hereby granted, free of charge, to any\nperson obtaining a copy of this software and associated\ndocumentation files (the \"Software\"), to deal in the\nSoftware without restriction, including without\nlimitation the rights to use, copy, modify, merge,\npublish, distribute, sublicense, and/or sell copies of\nthe Software, and to permit persons to whom the Software\nis furnished to do so, subject to the following\nconditions:\n\nThe above copyright notice and this permission notice\nshall be included in all copies or substantial portions\nof the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF\nANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED\nTO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A\nPARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT\nSHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\nCLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\nOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR\nIN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\nDEALINGS IN THE SOFTWARE.\n"
       - license: Apache-2.0
         text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
+  - package_name: shellexpand
+    package_version: 3.0.0
+    license: MIT/Apache-2.0
+    licenses:
+      - license: MIT
+        text: "The MIT License (MIT)\n\nCopyright (c) 2016 Vladimir Matveev\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n"
+      - license: Apache-2.0
+        text: "                              Apache License\n                        Version 2.0, January 2004\n                     http://www.apache.org/licenses/\n\nTERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n1. Definitions.\n\n   \"License\" shall mean the terms and conditions for use, reproduction,\n   and distribution as defined by Sections 1 through 9 of this document.\n\n   \"Licensor\" shall mean the copyright owner or entity authorized by\n   the copyright owner that is granting the License.\n\n   \"Legal Entity\" shall mean the union of the acting entity and all\n   other entities that control, are controlled by, or are under common\n   control with that entity. For the purposes of this definition,\n   \"control\" means (i) the power, direct or indirect, to cause the\n   direction or management of such entity, whether by contract or\n   otherwise, or (ii) ownership of fifty percent (50%) or more of the\n   outstanding shares, or (iii) beneficial ownership of such entity.\n\n   \"You\" (or \"Your\") shall mean an individual or Legal Entity\n   exercising permissions granted by this License.\n\n   \"Source\" form shall mean the preferred form for making modifications,\n   including but not limited to software source code, documentation\n   source, and configuration files.\n\n   \"Object\" form shall mean any form resulting from mechanical\n   transformation or translation of a Source form, including but\n   not limited to compiled object code, generated documentation,\n   and conversions to other media types.\n\n   \"Work\" shall mean the work of authorship, whether in Source or\n   Object form, made available under the License, as indicated by a\n   copyright notice that is included in or attached to the work\n   (an example is provided in the Appendix below).\n\n   \"Derivative Works\" shall mean any work, whether in Source or Object\n   form, that is based on (or derived from) the Work and for which the\n   editorial revisions, annotations, elaborations, or other modifications\n   represent, as a whole, an original work of authorship. For the purposes\n   of this License, Derivative Works shall not include works that remain\n   separable from, or merely link (or bind by name) to the interfaces of,\n   the Work and Derivative Works thereof.\n\n   \"Contribution\" shall mean any work of authorship, including\n   the original version of the Work and any modifications or additions\n   to that Work or Derivative Works thereof, that is intentionally\n   submitted to Licensor for inclusion in the Work by the copyright owner\n   or by an individual or Legal Entity authorized to submit on behalf of\n   the copyright owner. For the purposes of this definition, \"submitted\"\n   means any form of electronic, verbal, or written communication sent\n   to the Licensor or its representatives, including but not limited to\n   communication on electronic mailing lists, source code control systems,\n   and issue tracking systems that are managed by, or on behalf of, the\n   Licensor for the purpose of discussing and improving the Work, but\n   excluding communication that is conspicuously marked or otherwise\n   designated in writing by the copyright owner as \"Not a Contribution.\"\n\n   \"Contributor\" shall mean Licensor and any individual or Legal Entity\n   on behalf of whom a Contribution has been received by Licensor and\n   subsequently incorporated within the Work.\n\n2. Grant of Copyright License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   copyright license to reproduce, prepare Derivative Works of,\n   publicly display, publicly perform, sublicense, and distribute the\n   Work and such Derivative Works in Source or Object form.\n\n3. Grant of Patent License. Subject to the terms and conditions of\n   this License, each Contributor hereby grants to You a perpetual,\n   worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n   (except as stated in this section) patent license to make, have made,\n   use, offer to sell, sell, import, and otherwise transfer the Work,\n   where such license applies only to those patent claims licensable\n   by such Contributor that are necessarily infringed by their\n   Contribution(s) alone or by combination of their Contribution(s)\n   with the Work to which such Contribution(s) was submitted. If You\n   institute patent litigation against any entity (including a\n   cross-claim or counterclaim in a lawsuit) alleging that the Work\n   or a Contribution incorporated within the Work constitutes direct\n   or contributory patent infringement, then any patent licenses\n   granted to You under this License for that Work shall terminate\n   as of the date such litigation is filed.\n\n4. Redistribution. You may reproduce and distribute copies of the\n   Work or Derivative Works thereof in any medium, with or without\n   modifications, and in Source or Object form, provided that You\n   meet the following conditions:\n\n   (a) You must give any other recipients of the Work or\n       Derivative Works a copy of this License; and\n\n   (b) You must cause any modified files to carry prominent notices\n       stating that You changed the files; and\n\n   (c) You must retain, in the Source form of any Derivative Works\n       that You distribute, all copyright, patent, trademark, and\n       attribution notices from the Source form of the Work,\n       excluding those notices that do not pertain to any part of\n       the Derivative Works; and\n\n   (d) If the Work includes a \"NOTICE\" text file as part of its\n       distribution, then any Derivative Works that You distribute must\n       include a readable copy of the attribution notices contained\n       within such NOTICE file, excluding those notices that do not\n       pertain to any part of the Derivative Works, in at least one\n       of the following places: within a NOTICE text file distributed\n       as part of the Derivative Works; within the Source form or\n       documentation, if provided along with the Derivative Works; or,\n       within a display generated by the Derivative Works, if and\n       wherever such third-party notices normally appear. The contents\n       of the NOTICE file are for informational purposes only and\n       do not modify the License. You may add Your own attribution\n       notices within Derivative Works that You distribute, alongside\n       or as an addendum to the NOTICE text from the Work, provided\n       that such additional attribution notices cannot be construed\n       as modifying the License.\n\n   You may add Your own copyright statement to Your modifications and\n   may provide additional or different license terms and conditions\n   for use, reproduction, or distribution of Your modifications, or\n   for any such Derivative Works as a whole, provided Your use,\n   reproduction, and distribution of the Work otherwise complies with\n   the conditions stated in this License.\n\n5. Submission of Contributions. Unless You explicitly state otherwise,\n   any Contribution intentionally submitted for inclusion in the Work\n   by You to the Licensor shall be under the terms and conditions of\n   this License, without any additional terms or conditions.\n   Notwithstanding the above, nothing herein shall supersede or modify\n   the terms of any separate license agreement you may have executed\n   with Licensor regarding such Contributions.\n\n6. Trademarks. This License does not grant permission to use the trade\n   names, trademarks, service marks, or product names of the Licensor,\n   except as required for reasonable and customary use in describing the\n   origin of the Work and reproducing the content of the NOTICE file.\n\n7. Disclaimer of Warranty. Unless required by applicable law or\n   agreed to in writing, Licensor provides the Work (and each\n   Contributor provides its Contributions) on an \"AS IS\" BASIS,\n   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or\n   implied, including, without limitation, any warranties or conditions\n   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A\n   PARTICULAR PURPOSE. You are solely responsible for determining the\n   appropriateness of using or redistributing the Work and assume any\n   risks associated with Your exercise of permissions under this License.\n\n8. Limitation of Liability. In no event and under no legal theory,\n   whether in tort (including negligence), contract, or otherwise,\n   unless required by applicable law (such as deliberate and grossly\n   negligent acts) or agreed to in writing, shall any Contributor be\n   liable to You for damages, including any direct, indirect, special,\n   incidental, or consequential damages of any character arising as a\n   result of this License or out of the use or inability to use the\n   Work (including but not limited to damages for loss of goodwill,\n   work stoppage, computer failure or malfunction, or any and all\n   other commercial damages or losses), even if such Contributor\n   has been advised of the possibility of such damages.\n\n9. Accepting Warranty or Additional Liability. While redistributing\n   the Work or Derivative Works thereof, You may choose to offer,\n   and charge a fee for, acceptance of support, warranty, indemnity,\n   or other liability obligations and/or rights consistent with this\n   License. However, in accepting such obligations, You may act only\n   on Your own behalf and on Your sole responsibility, not on behalf\n   of any other Contributor, and only if You agree to indemnify,\n   defend, and hold each Contributor harmless for any liability\n   incurred by, or claims asserted against, such Contributor by reason\n   of your accepting any such warranty or additional liability.\n\nEND OF TERMS AND CONDITIONS\n\nAPPENDIX: How to apply the Apache License to your work.\n\n   To apply the Apache License to your work, attach the following\n   boilerplate notice, with the fields enclosed by brackets \"[]\"\n   replaced with your own identifying information. (Don't include\n   the brackets!)  The text should be enclosed in the appropriate\n   comment syntax for the file format. We also recommend that a\n   file or class name and description of purpose be included on the\n   same \"printed page\" as the copyright notice for easier\n   identification within third-party archives.\n\nCopyright [yyyy] [name of copyright owner]\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n\thttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n"
   - package_name: signal-hook-registry
     package_version: 1.4.0
     license: Apache-2.0/MIT


Test patch:
diff --git a/vl-convert-python/tests/test_specs.py b/vl-convert-python/tests/test_specs.py
index c945099d..f2e1d1e5 100644
--- a/vl-convert-python/tests/test_specs.py
+++ b/vl-convert-python/tests/test_specs.py
@@ -8,6 +8,8 @@
 specs_dir = root_dir / "vl-convert-rs" / "tests" / "vl-specs"
 fonts_dir = root_dir / "vl-convert-rs" / "tests" / "fonts"
 
+BACKGROUND_COLOR = "#abc"
+
 
 def setup_module(module):
     vlc.register_font_directory(str(fonts_dir))
@@ -37,8 +39,8 @@ def load_expected_svg(name, vl_version):
         return f.read()
 
 
-def load_expected_png(name, vl_version):
-    filename = f"{name}.png"
+def load_expected_png(name, vl_version, theme=None):
+    filename = f"{name}-{theme}.png" if theme else f"{name}.png"
     spec_path = specs_dir / "expected" / vl_version / filename
     with spec_path.open("rb") as f:
         return f.read()
@@ -105,3 +107,24 @@ def test_png(name, scale, as_dict):
     # Convert directly to image
     png = vlc.vegalite_to_png(vl_spec, vl_version=vl_version, scale=scale)
     assert png == expected_png
+
+
+@pytest.mark.parametrize(
+    "name,scale,theme", [("circle_binned", 1.0, "dark"), ("stacked_bar_h", 2.0, "vox")]
+)
+def test_png_theme_config(name, scale, theme):
+    vl_version = "v5_5"
+    vl_spec = json.loads(load_vl_spec(name))
+
+    expected_png = load_expected_png(name, vl_version, theme)
+
+    # Convert directly to image
+    config = dict(background=BACKGROUND_COLOR)
+    png = vlc.vegalite_to_png(
+        vl_spec,
+        vl_version=vl_version,
+        scale=scale,
+        theme=theme,
+        config=config,
+    )
+    assert png == expected_png
diff --git a/vl-convert-python/tests/test_themes.py b/vl-convert-python/tests/test_themes.py
new file mode 100644
index 00000000..97d383d8
--- /dev/null
+++ b/vl-convert-python/tests/test_themes.py
@@ -0,0 +1,10 @@
+import vl_convert as vlc
+
+
+def test_get_themes_dark_theme_background():
+    themes = vlc.get_themes()
+    assert isinstance(themes, dict)
+    dark = themes["dark"]
+    assert isinstance(dark, dict)
+    background = dark["background"]
+    assert background == "#333"
diff --git a/vl-convert-rs/tests/test_specs.rs b/vl-convert-rs/tests/test_specs.rs
index 0026c9be..88dc982d 100644
--- a/vl-convert-rs/tests/test_specs.rs
+++ b/vl-convert-rs/tests/test_specs.rs
@@ -1,12 +1,13 @@
 use rstest::rstest;
 use std::fs;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use vl_convert_rs::text::register_font_directory;
 use vl_convert_rs::VlVersion;
 
 use std::sync::Once;
 
 static INIT: Once = Once::new();
+const BACKGROUND_COLOR: &str = "#abc";
 
 pub fn initialize() {
     INIT.call_once(|| {
@@ -35,7 +36,7 @@ fn load_expected_vg_spec(name: &str, vl_version: VlVersion) -> Option<serde_json
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
+        .join(format!("{:?}", vl_version))
         .join(format!("{}.vg.json", name));
     if spec_path.exists() {
         let spec_str = fs::read_to_string(&spec_path)
@@ -46,36 +47,49 @@ fn load_expected_vg_spec(name: &str, vl_version: VlVersion) -> Option<serde_json
     }
 }
 
-fn load_expected_svg(name: &str, vl_version: VlVersion) -> String {
+fn make_expected_svg_path(name: &str, vl_version: VlVersion, theme: Option<&str>) -> PathBuf {
     let root_path = Path::new(env!("CARGO_MANIFEST_DIR"));
-    let spec_path = root_path
+    root_path
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
-        .join(format!("{}.svg", name));
-    let svg_str =
-        fs::read_to_string(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path));
-    svg_str
+        .join(format!("{:?}", vl_version))
+        .join(if let Some(theme) = theme {
+            format!("{}-{}.svg", name, theme)
+        } else {
+            format!("{}.svg", name)
+        })
 }
 
-fn load_expected_png(name: &str, vl_version: VlVersion) -> Vec<u8> {
+fn load_expected_svg(name: &str, vl_version: VlVersion, theme: Option<&str>) -> String {
+    let spec_path = make_expected_svg_path(name, vl_version, theme);
+    fs::read_to_string(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path))
+}
+
+fn make_expected_png_path(name: &str, vl_version: VlVersion, theme: Option<&str>) -> PathBuf {
     let root_path = Path::new(env!("CARGO_MANIFEST_DIR"));
-    let spec_path = root_path
+    root_path
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
-        .join(format!("{}.png", name));
-    let png_data =
-        fs::read(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path));
-    png_data
+        .join(format!("{:?}", vl_version))
+        .join(if let Some(theme) = theme {
+            format!("{}-{}.png", name, theme)
+        } else {
+            format!("{}.png", name)
+        })
+}
+
+fn load_expected_png(name: &str, vl_version: VlVersion, theme: Option<&str>) -> Vec<u8> {
+    let spec_path = make_expected_png_path(name, vl_version, theme);
+    fs::read(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path))
 }
 
 #[rustfmt::skip]
 mod test_vegalite_to_vega {
     use crate::*;
     use futures::executor::block_on;
+    use vl_convert_rs::converter::VlOpts;
     use vl_convert_rs::VlConverter;
 
     #[rstest]
@@ -102,7 +116,10 @@ mod test_vegalite_to_vega {
         // Create Vega-Lite Converter and perform conversion
         let mut converter = VlConverter::new();
 
-        let vg_result = block_on(converter.vegalite_to_vega(vl_spec, vl_version));
+        let vg_result = block_on(
+            converter.vegalite_to_vega(vl_spec, VlOpts{vl_version, ..Default::default()}
+            )
+        );
 
         match load_expected_vg_spec(name, vl_version) {
             Some(expected_vg_spec) => {
@@ -126,6 +143,7 @@ mod test_vegalite_to_vega {
 mod test_svg {
     use crate::*;
     use futures::executor::block_on;
+    use vl_convert_rs::converter::VlOpts;
     use vl_convert_rs::VlConverter;
 
     #[rstest]
@@ -146,30 +164,24 @@ mod test_svg {
         let vl_spec = load_vl_spec(name);
 
         // Load expected SVG image
-        let expected_svg = load_expected_svg(name, vl_version);
+        let expected_svg = load_expected_svg(name, vl_version, None);
 
         // Create Vega-Lite Converter and perform conversion
         let mut converter = VlConverter::new();
 
         // Convert to vega first
         let vg_spec =
-            block_on(converter.vegalite_to_vega(vl_spec.clone(), vl_version)).unwrap();
+            block_on(converter.vegalite_to_vega(vl_spec.clone(), VlOpts{vl_version, ..Default::default()})).unwrap();
 
         let svg = block_on(converter.vega_to_svg(vg_spec)).unwrap();
         assert_eq!(svg, expected_svg);
 
         // Convert directly to svg
-        let svg = block_on(converter.vegalite_to_svg(vl_spec, vl_version)).unwrap();
-        assert_eq!(svg, svg);
+        let svg = block_on(converter.vegalite_to_svg(vl_spec, VlOpts{vl_version, ..Default::default()})).unwrap();
+        assert_eq!(svg, expected_svg);
 
         // // Write out reference image
-        // let root_path = Path::new(env!("CARGO_MANIFEST_DIR"));
-        // let svg_path = root_path
-        //     .join("tests")
-        //     .join("vl-specs")
-        //     .join("expected")
-        //     .join(format!("{:?}", vl_version))
-        //     .join(format!("{}.svg", name));
+        // let svg_path = make_expected_svg_path(name, vl_version, None);
         // std::fs::write(svg_path, svg).unwrap();
     }
 
@@ -181,6 +193,7 @@ mod test_svg {
 mod test_png {
     use crate::*;
     use futures::executor::block_on;
+    use vl_convert_rs::converter::VlOpts;
     use vl_convert_rs::VlConverter;
 
     #[rstest(name, scale,
@@ -200,33 +213,84 @@ mod test_png {
         // Load example Vega-Lite spec
         let vl_spec = load_vl_spec(name);
 
-        // Load expected SVG image
-        let expected_png_data = load_expected_png(name, vl_version);
+        // Load expected PNG image
+        let expected_png_data = load_expected_png(name, vl_version, None);
 
         // Create Vega-Lite Converter and perform conversion
         let mut converter = VlConverter::new();
 
         // Convert to vega first
-        let vg_spec = block_on(converter.vegalite_to_vega(vl_spec.clone(), vl_version)).unwrap();
+        let vg_spec = block_on(
+            converter.vegalite_to_vega(vl_spec.clone(), VlOpts{vl_version, ..Default::default()})
+        ).unwrap();
 
         let png_data = block_on(converter.vega_to_png(vg_spec, Some(scale))).unwrap();
         assert_eq!(png_data, expected_png_data);
 
-        // Convert directly to svg
-        let png_data = block_on(converter.vegalite_to_png(vl_spec, vl_version, Some(scale))).unwrap();
-        assert_eq!(png_data, png_data);
+        // Convert directly to png
+        let png_data = block_on(
+            converter.vegalite_to_png(vl_spec, VlOpts{vl_version, ..Default::default()}, Some(scale))
+        ).unwrap();
+        assert_eq!(png_data, expected_png_data);
 
         // // Write out reference image
-        // let root_path = Path::new(env!("CARGO_MANIFEST_DIR"));
-        // let png_path = root_path
-        //     .join("tests")
-        //     .join("vl-specs")
-        //     .join("expected")
-        //     .join(format!("{:?}", vl_version))
-        //     .join(format!("{}.png", name));
+        // let png_path = make_expected_png_path(name, vl_version, None);
         // std::fs::write(png_path, png_data).unwrap();
     }
 
     #[test]
     fn test_marker() {} // Help IDE detect test module
 }
+
+#[rustfmt::skip]
+mod test_png_theme_config {
+    use crate::*;
+    use futures::executor::block_on;
+    use vl_convert_rs::converter::VlOpts;
+    use vl_convert_rs::VlConverter;
+
+    #[rstest(name, scale, theme,
+    case("circle_binned", 1.0, "dark"),
+    case("stacked_bar_h", 2.0, "vox"),
+    case("bar_chart_trellis_compact", 2.0, "excel"),
+    case("line_with_log_scale", 2.0, "fivethirtyeight")
+    )]
+    fn test(
+        name: &str,
+        scale: f32,
+        theme: &str,
+    ) {
+        initialize();
+
+        let vl_version = VlVersion::v5_5;
+
+        // Load example Vega-Lite spec
+        let vl_spec = load_vl_spec(name);
+
+        // Load expected PNG image
+        let expected_png_data = load_expected_png(name, vl_version, Some(theme));
+
+        // Create Vega-Lite Converter and perform conversion
+        let mut converter = VlConverter::new();
+
+        // Convert directly to png with theme and config that overrides background color
+        let png_data = block_on(
+            converter.vegalite_to_png(
+                vl_spec,
+                VlOpts {
+                    vl_version,
+                    theme: Some(theme.to_string()),
+                    config: Some(serde_json::json!({"background": BACKGROUND_COLOR})),
+                }, Some(scale)
+            )
+        ).unwrap();
+        assert_eq!(png_data, expected_png_data);
+
+        // Write out reference image
+        let png_path = make_expected_png_path(name, vl_version, Some(theme));
+        std::fs::write(png_path, png_data).unwrap();
+    }
+
+    #[test]
+    fn test_marker() {} // Help IDE detect test module
+}
diff --git a/vl-convert-rs/tests/test_themes.rs b/vl-convert-rs/tests/test_themes.rs
new file mode 100644
index 00000000..326f47e1
--- /dev/null
+++ b/vl-convert-rs/tests/test_themes.rs
@@ -0,0 +1,17 @@
+use vl_convert_rs::VlConverter;
+
+#[tokio::test]
+async fn test_get_themes_dark_background() {
+    // Create Vega-Lite Converter and perform conversion
+    let mut converter = VlConverter::new();
+    if let serde_json::Value::Object(all_themes) = converter.get_themes().await.unwrap() {
+        if let serde_json::Value::Object(dark) = all_themes.get("dark").unwrap() {
+            let background = dark.get("background").unwrap().as_str().unwrap();
+            assert_eq!(background, "#333");
+        } else {
+            panic!("Expected dark theme to be an object")
+        }
+    } else {
+        panic!("Expected themes to be an object")
+    }
+}
diff --git a/vl-convert-rs/tests/vl-specs/expected/v5_5/bar_chart_trellis_compact-excel.png b/vl-convert-rs/tests/vl-specs/expected/v5_5/bar_chart_trellis_compact-excel.png
new file mode 100644
index 00000000..a7b9f965
Binary files /dev/null and b/vl-convert-rs/tests/vl-specs/expected/v5_5/bar_chart_trellis_compact-excel.png differ
diff --git a/vl-convert-rs/tests/vl-specs/expected/v5_5/circle_binned-dark.png b/vl-convert-rs/tests/vl-specs/expected/v5_5/circle_binned-dark.png
new file mode 100644
index 00000000..91fa526f
Binary files /dev/null and b/vl-convert-rs/tests/vl-specs/expected/v5_5/circle_binned-dark.png differ
diff --git a/vl-convert-rs/tests/vl-specs/expected/v5_5/line_with_log_scale-fivethirtyeight.png b/vl-convert-rs/tests/vl-specs/expected/v5_5/line_with_log_scale-fivethirtyeight.png
new file mode 100644
index 00000000..062bc41a
Binary files /dev/null and b/vl-convert-rs/tests/vl-specs/expected/v5_5/line_with_log_scale-fivethirtyeight.png differ
diff --git a/vl-convert-rs/tests/vl-specs/expected/v5_5/stacked_bar_h-vox.png b/vl-convert-rs/tests/vl-specs/expected/v5_5/stacked_bar_h-vox.png
new file mode 100644
index 00000000..a10c3d36
Binary files /dev/null and b/vl-convert-rs/tests/vl-specs/expected/v5_5/stacked_bar_h-vox.png differ
diff --git a/vl-convert/tests/test_cli.rs b/vl-convert/tests/test_cli.rs
index fb3083ea..fcb32b79 100644
--- a/vl-convert/tests/test_cli.rs
+++ b/vl-convert/tests/test_cli.rs
@@ -2,12 +2,15 @@ use assert_cmd::prelude::*; // Add methods on commands
 use predicates::prelude::*; // Used for writing assertions
 use rstest::rstest;
 use std::fs;
+use std::io::Write;
 use std::path::Path;
 use std::process::Command;
 use std::str::FromStr; // Run programs
 use std::sync::Once;
+use tempfile::NamedTempFile;
 use vl_convert_rs::VlVersion;
 
+const BACKGROUND_COLOR: &str = "#abc";
 static INIT: Once = Once::new();
 
 pub fn initialize() {
@@ -39,7 +42,7 @@ fn load_expected_vg_spec(name: &str, vl_version: &str, pretty: bool) -> Option<S
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
+        .join(format!("{:?}", vl_version))
         .join(if pretty {
             format!("{}.vg.pretty.json", name)
         } else {
@@ -64,13 +67,13 @@ fn load_expected_svg(name: &str, vl_version: &str) -> String {
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
+        .join(format!("{:?}", vl_version))
         .join(format!("{}.svg", name));
 
-    fs::read_to_string(&spec_path).unwrap()
+    fs::read_to_string(spec_path).unwrap()
 }
 
-fn load_expected_png(name: &str, vl_version: &str) -> Vec<u8> {
+fn load_expected_png(name: &str, vl_version: &str, theme: Option<&str>) -> Vec<u8> {
     let vl_version = VlVersion::from_str(vl_version).unwrap();
     let root_path = Path::new(env!("CARGO_MANIFEST_DIR"));
     let spec_path = root_path
@@ -79,11 +82,13 @@ fn load_expected_png(name: &str, vl_version: &str) -> Vec<u8> {
         .join("tests")
         .join("vl-specs")
         .join("expected")
-        .join(&format!("{:?}", vl_version))
-        .join(format!("{}.png", name));
-    let png_data =
-        fs::read(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path));
-    png_data
+        .join(format!("{:?}", vl_version))
+        .join(if let Some(theme) = theme {
+            format!("{}-{}.png", name, theme)
+        } else {
+            format!("{}.png", name)
+        });
+    fs::read(&spec_path).unwrap_or_else(|_| panic!("Failed to read {:?}", spec_path))
 }
 
 fn output_path(filename: &str) -> String {
@@ -257,13 +262,91 @@ mod test_vl2png {
             .arg("--scale").arg(scale.to_string());
 
         // Load expected
-        let expected_str = load_expected_png(name, vl_version);
+        let expected_png = load_expected_png(name, vl_version, None);
         cmd.assert().success();
 
         // Load written spec
-        let output_str = fs::read(&output).unwrap();
-        assert_eq!(expected_str, output_str);
+        let output_png = fs::read(&output).unwrap();
+        assert_eq!(expected_png, output_png);
+
+        Ok(())
+    }
+}
+
+#[rustfmt::skip]
+mod test_vl2png_theme_config {
+    use std::fs;
+    use std::process::Command;
+    use crate::*;
+
+    #[rstest(name, scale, theme,
+    case("circle_binned", 1.0, "dark"),
+    case("stacked_bar_h", 2.0, "vox")
+    )]
+    fn test(
+        name: &str,
+        scale: f32,
+        theme: &str,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        initialize();
+
+        let vl_version = "5_5";
+        let output_filename = format!("{}_{}.png", vl_version, name);
+
+        let vl_path = vl_spec_path(name);
+        let output = output_path(&output_filename);
+
+        // Write config with background color to temporary file
+        let mut config_file = NamedTempFile::new().unwrap();
+        writeln!(config_file, r#"{{"background": "{}"}}"#, BACKGROUND_COLOR).unwrap();
+        let config_path = config_file.path().to_str().unwrap();
+
+        let mut cmd = Command::cargo_bin("vl-convert")?;
+        let cmd = cmd.arg("vl2png")
+            .arg("-i").arg(vl_path)
+            .arg("-o").arg(&output)
+            .arg("--vl-version").arg(vl_version)
+            .arg("--font-dir").arg(test_font_dir())
+            .arg("--theme").arg(theme)
+            .arg("--config").arg(config_path)
+            .arg("--scale").arg(scale.to_string());
+
+        // Load expected
+        let expected_png = load_expected_png(name, vl_version, Some(theme));
+        cmd.assert().success();
+
+        // Load written spec
+        let output_png = fs::read(&output).unwrap();
+        assert_eq!(expected_png, output_png);
 
         Ok(())
     }
 }
+
+#[test]
+fn test_ls_themes() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = Command::cargo_bin("vl-convert")?;
+    let cmd = cmd.arg("ls-themes");
+    cmd.assert().success();
+
+    let output = cmd.output().unwrap();
+    let output_str = String::from_utf8(output.stdout).unwrap();
+    assert!(output_str.contains("dark"));
+
+    Ok(())
+}
+
+#[test]
+fn test_cat_theme() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = Command::cargo_bin("vl-convert")?;
+    let cmd = cmd.arg("cat-theme").arg("dark");
+    cmd.assert().success();
+
+    let output = cmd.output().unwrap();
+    let output_str = String::from_utf8(output.stdout).unwrap();
+
+    // Check for known background color entry
+    assert!(output_str.contains(r##""background": "#333"##));
+
+    Ok(())
+}