Repository: datalad/datalad-neuroimaging (language: python)

Issue:
Bring up to speed with `datalad-extension-template`
See: https://github.com/datalad/datalad-extension-template

Since this extension was created before more recent updates to the extension template, some aspects of the repo could be outdated.


bids2scidata test when new metadata becomes available
As soon as we have new-style metadata exposed somewhere, this command can easily be tested via installing from the `///` dataset.


Discussion / hints:
I started looking into it and trying to assess the required / desired scope of changes. Please correct me if I'm wrong.

Following the dev call discussion, I tried merging the template into this one to see what would change (`git merge --allow-unrelated-histories --squash template/master`).
<details>
<summary>Here's the raw status output showing what's new and what conflicts</summary>

```
Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
	new file:   .codeclimate.yml
	new file:   .gitattributes
	new file:   .github/workflows/docbuild.yml
	new file:   .github/workflows/test_crippledfs.yml
	new file:   .noannex
	new file:   .zenodo.json
	renamed:    COPYING -> LICENSE
	new file:   MANIFEST.in
	new file:   _datalad_buildsupport/__init__.py
	new file:   _datalad_buildsupport/formatters.py
	new file:   _datalad_buildsupport/setup.py
	new file:   datalad_helloworld/_version.py
	new file:   datalad_helloworld/hello_cmd.py
	new file:   datalad_helloworld/tests/__init__.py
	new file:   pyproject.toml
	new file:   setup.cfg
	new file:   tools/ci/appveyor_env_setup.bat
	new file:   versioneer.py

Unmerged paths:
  (use "git restore --staged <file>..." to unstage)
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both added:      .appveyor.yml
	both added:      .gitignore
	both added:      Makefile
	both modified:   README.md
	deleted by us:   datalad_helloworld/__init__.py
	deleted by us:   datalad_helloworld/tests/test_register.py
	both added:      docs/Makefile
	both added:      docs/source/conf.py
	both added:      docs/source/index.rst
	both added:      requirements-devel.txt
	deleted by them: requirements.txt
	both modified:   setup.py
```
</details>

I see the following groups:
- Additions / overhauls:
  - python packaging related: addition of `setup.cfg`, `pyproject.toml`, `MANIFEST.in`, addition of versioneer, `setup.py` overhaul
  - addition of two github workflows (does the docs workflow mean that the docs build process changes completely?)
  - addition of codeclimate (is external setup needed? is it wanted here?)
- Tweaks:
  - metadata: `zenodo.json`, `COPYING` -> `LICENSE`...
  - minor changes to appveyor config
  - minor changes to docs configuration (but mainly removing the commented-out blocks)

So in the end there doesn't seem to be too much of a change, other than the python packaging things, unless I am missing something. 
- I'd happily do the tweaks, maybe them alone (note to self: either through merge or half-manually like `M-x ediff files`)
- I'm missing packaging-related knowledge, may try but feels risky to touch
- I feel that codeclimate and github actions need a decision

So, what scope of changes would be best?
Unless I'm missing some context from on the history of this extension, I'd say we should keep it as close to the extension template as possible.


> addition of two github workflows (does the docs workflow mean that the docs build process changes completely?)

I would add both, since they are part of the standard template. Let's see what the response is to the docs build process #98.   If it requires a different setup to what is currently implemented here, that change would be easy.

> addition of codeclimate (is external setup needed? is it wanted here?)

I don't think it would hurt to have the codeclimate config here. I'm guessing it needs some external setup/linking for it to start working, so that step can always be done at a later stage if it's not needed now.

> I'm missing packaging-related knowledge, may try but feels risky to touch

Yeah I'm also hesitant here. I'd try and duplicate the extension-template, but I don't know what (required) functionality I'd be dropping unintentionally by removing existing parts. I'd get extra input here. @datalad/developers can anyone help clarify which current code/files in `datalad-neuroimaging` are necessary to keep in addition to updating content to mirror the extension setup?

I am fully in line for @jsheunis. Few additional pointers:

Code climate report: https://codeclimate.com/github/datalad/datalad-neuroimaging (no additional setup required, but could be tuned)

Re unintentional removing: I wouldn't worry about it much. First, it is useful to question everything that the old setup installed -- who knows if it is still relevant. Once the update PR is done. It is easy to compare the outcomes of `python setup.py (s|b)dist` pre and post update to discover and discuss and potential issues.
# [Codecov](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=h1) Report
> Merging [#5](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=desc) into [master](https://codecov.io/gh/datalad/datalad-neuroimaging/commit/0af72599bff58f687f7110f4c10db4ed6d273aa6?src=pr&el=desc) will **increase** coverage by `3.53%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5/graphs/tree.svg?token=jhDpBMJ0PY&src=pr&height=150&width=650)](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master       #5      +/-   ##
==========================================
+ Coverage      86%   89.53%   +3.53%     
==========================================
  Files          19       19              
  Lines         879      889      +10     
==========================================
+ Hits          756      796      +40     
+ Misses        123       93      -30
```


| [Impacted Files](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [datalad\_neuroimaging/tests/test\_bids2scidata.py](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5/diff?src=pr&el=tree#diff-ZGF0YWxhZF9uZXVyb2ltYWdpbmcvdGVzdHMvdGVzdF9iaWRzMnNjaWRhdGEucHk=) | `100% <100%> (ø)` | :arrow_up: |
| [datalad\_neuroimaging/tests/utils.py](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5/diff?src=pr&el=tree#diff-ZGF0YWxhZF9uZXVyb2ltYWdpbmcvdGVzdHMvdXRpbHMucHk=) | `88.09% <0%> (+2.38%)` | :arrow_up: |
| [datalad\_neuroimaging/bids2scidata.py](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5/diff?src=pr&el=tree#diff-ZGF0YWxhZF9uZXVyb2ltYWdpbmcvYmlkczJzY2lkYXRhLnB5) | `82.27% <0%> (+9.17%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=footer). Last update [0af7259...154fefe](https://codecov.io/gh/datalad/datalad-neuroimaging/pull/5?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).


Fix patch:
diff --git a/.appveyor.yml b/.appveyor.yml
index 9ced396..5cfb436 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -39,10 +39,14 @@
 #   - to prevent the CI run from exiting, create a textfile named `BLOCK` on the
 #     Desktop (a required .txt extension will be added automatically). The session
 #     will run until the file is removed (or 60 min have passed)
+#
+#   - in a terminal execute, for example, `C:\datalad_debug.bat 39` to set up the
+#     environment to debug in a Python 3.8 session (should generally match the
+#     respective CI run configuration).
 
 
-# make repository clone cheap
-shallow_clone: true
+# do not make repository clone cheap: interferes with versioneer
+shallow_clone: false
 
 
 environment:
@@ -53,9 +57,6 @@ environment:
   # The ID variable had no impact, but sorts first in the CI run overview
   # an intelligible name can help to locate a specific test run
   matrix:
-    ## going for ~30min CI job duration to leave ample time for debugging and
-    ## get fast turn around via multi-job parallelization
-
     # List a CI run for each platform first, to have immediate access when there
     # is a need for debugging
 
@@ -68,13 +69,14 @@ environment:
       INSTALL_GITANNEX: git-annex -m deb-url --url http://snapshot.debian.org/archive/debian/20210906T204127Z/pool/main/g/git-annex/git-annex_8.20210903-1_amd64.deb
       CODECOV_BINARY: https://uploader.codecov.io/latest/linux/codecov
     # Windows core tests
-    - ID: WinP38
+    - ID: WinP39core
       DTS: datalad_neuroimaging
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
       # Python version specification is non-standard on windows
-      PY: 38-x64
+      PY: 39-x64
+      INSTALL_GITANNEX: git-annex -m datalad/packages
     # MacOS core tests
-    - ID: MacP38
+    - ID: MacP38core
       DTS: datalad_neuroimaging
       APPVEYOR_BUILD_WORKER_IMAGE: macOS
       PY: 3.8
@@ -82,6 +84,10 @@ environment:
       DATALAD_LOCATIONS_SOCKETS: /Users/appveyor/DLTMP/sockets
       CODECOV_BINARY: https://uploader.codecov.io/latest/macos/codecov
 
+matrix:
+  allow_failures:
+    - KNOWN2FAIL: 1
+
 
 # it is OK to specify paths that may not exist for a particular test run
 cache:
@@ -121,11 +127,11 @@ init:
   - cmd: "set TMP=C:\\DLTMP"
   - cmd: "set TEMP=C:\\DLTMP"
   - sh: export TMPDIR=~/DLTMP
-  # deploy the datalad installer
-  - appveyor DownloadFile https://raw.githubusercontent.com/datalad/datalad-installer/master/src/datalad_installer.py -FileName datalad_installer.py
 
 
 install:
+  # place a debug setup helper at a convenient location
+  - cmd: copy tools\ci\appveyor_env_setup.bat C:\\datalad_debug.bat
   # If a particular Python version is requested, use env setup (using the
   # appveyor provided environments/installation). Note, these are broken
   # on the ubuntu images
@@ -134,13 +140,25 @@ install:
   # use of python/pip executables below
   - sh: "[ \"x$PY\" != x ] && . ${HOME}/venv${PY}/bin/activate || virtualenv -p 3 ${HOME}/dlvenv && . ${HOME}/dlvenv/bin/activate; ln -s \"$VIRTUAL_ENV\" \"${HOME}/VENV\""
   - cmd: "set PATH=C:\\Python%PY%;C:\\Python%PY%\\Scripts;%PATH%"
-  - sh: "[ -n \"$INSTALL_SYSPKGS\" ] && ( [ \"x${APPVEYOR_BUILD_WORKER_IMAGE}\" = \"xmacOS\" ] && brew install -q ${INSTALL_SYSPKGS} || sudo apt-get install --no-install-recommends -y ${INSTALL_SYSPKGS} ) || true"
+  # deploy the datalad installer, override version via DATALAD_INSTALLER_VERSION
+  - cmd:
+      IF DEFINED DATALAD_INSTALLER_VERSION (
+      python -m pip install "datalad-installer%DATALAD_INSTALLER_VERSION%"
+      ) ELSE (
+      python -m pip install datalad-installer
+      )
+  - sh: python -m pip install datalad-installer${DATALAD_INSTALLER_VERSION:-}
+  # Missing system software
+  - sh: "[ -n \"$INSTALL_SYSPKGS\" ] && ( [ \"x${APPVEYOR_BUILD_WORKER_IMAGE}\" = \"xmacOS\" ] && brew install -q ${INSTALL_SYSPKGS} || { sudo apt-get update -y && sudo apt-get install --no-install-recommends -y ${INSTALL_SYSPKGS}; } ) || true"
   # Install git-annex on windows, otherwise INSTALL_SYSPKGS can be used
   # deploy git-annex, if desired
-  - cmd: IF DEFINED INSTALL_GITANNEX python datalad_installer.py --sudo ok %INSTALL_GITANNEX%
-  - sh: "[ -n \"${INSTALL_GITANNEX}\" ] && python datalad_installer.py --sudo ok ${INSTALL_GITANNEX}"
-  # TODO remove when datalad-installer can handle this
-  - cmd: tools\ci\appveyor_install_git-annex.bat
+  - cmd: IF DEFINED INSTALL_GITANNEX datalad-installer --sudo ok %INSTALL_GITANNEX%
+  - sh: "[ -n \"${INSTALL_GITANNEX}\" ] && datalad-installer --sudo ok ${INSTALL_GITANNEX}"
+  # in case of a snapshot installation, use the following approach to adjust
+  # the PATH as necessary
+  #- sh: "[ -n \"${INSTALL_GITANNEX}\" ] && datalad-installer -E ${HOME}/dlinstaller_env.sh --sudo ok ${INSTALL_GITANNEX}"
+  # add location of datalad installer results to PATH
+  #- sh: "[ -f ${HOME}/dlinstaller_env.sh ] && . ${HOME}/dlinstaller_env.sh || true"
 
 
 #before_build:
@@ -148,8 +166,8 @@ install:
 
 
 build_script:
-  - pip install -r requirements-devel.txt
-  - pip install .[devel]
+  - python -m pip install -r requirements-devel.txt
+  - python -m pip install .
 
 
 #after_build:
@@ -157,6 +175,7 @@ build_script:
 
 
 before_test:
+  # simple call to see if datalad and git-annex are installed properly
   - datalad wtf
 
 
@@ -171,12 +190,10 @@ test_script:
 
 
 after_test:
-  # prepare coverage.xml in a separate invocation.
-  # if invoked directly with nose - do not include test_ files themselves
   - python -m coverage xml
   - cmd: curl -fsSL -o codecov.exe "https://uploader.codecov.io/latest/windows/codecov.exe"
   - cmd: .\codecov.exe -f "coverage.xml"
-  - sh: curl -Os $CODECOV_BINARY
+  - sh: "curl -Os $CODECOV_BINARY"
   - sh: chmod +x codecov
   - sh: ./codecov
 
diff --git a/.codeclimate.yml b/.codeclimate.yml
new file mode 100644
index 0000000..9ac1b30
--- /dev/null
+++ b/.codeclimate.yml
@@ -0,0 +1,17 @@
+version: "2"
+checks:
+  file-lines:
+    config:
+      threshold: 500
+plugins:
+  bandit:
+    enabled: true
+    checks:
+      assert_used:
+        enabled: false
+exclude_patterns:
+- "_datalad_buildsupport/"
+- "versioneer.py"
+- "*/_version.py"
+- "tools/"
+- "**/tests/"
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..7b23e5c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,1 @@
+datalad_neuroimaging/_version.py export-subst
diff --git a/.github/workflows/docbuild.yml b/.github/workflows/docbuild.yml
new file mode 100644
index 0000000..127c330
--- /dev/null
+++ b/.github/workflows/docbuild.yml
@@ -0,0 +1,27 @@
+name: docs
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Set up environment
+      run: |
+        git config --global user.email "test@github.land"
+        git config --global user.name "GitHub Almighty"
+    - uses: actions/checkout@v1
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.8
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements-devel.txt
+        pip install .
+    - name: Build docs
+      run: |
+        make -C docs html
diff --git a/.gitignore b/.gitignore
index a1991ee..9858fe7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,11 @@
 *.py[coe]
 .#*
 .*.swp
+datalad_neuroimaging/tests/data/bids/
+*~
+\#*\#
+pip-wheel-metadata
 docs/build
 docs/source/generated
-datalad_neuroimaging/tests/data/bids/
+build/
+dist/
diff --git a/.noannex b/.noannex
new file mode 100644
index 0000000..e69de29
diff --git a/.zenodo.json b/.zenodo.json
new file mode 100644
index 0000000..27d3d29
--- /dev/null
+++ b/.zenodo.json
@@ -0,0 +1,47 @@
+{
+    "creators": [
+	{
+            "affiliation": "Dartmouth College, Hanover, NH, United States",
+            "name": "Halchenko, Yaroslav O.",
+            "orcid": "0000-0003-3456-2493"
+        },
+	{
+            "affiliation": "Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany and Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany",
+            "name": "Hanke, Michael",
+            "orcid": "0000-0001-6398-6370"
+	},
+	{
+	    "affiliation": "Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany",
+	    "name": "Heunis, Stephan",
+	    "orcid": "0000-0003-3503-9872"
+	},
+	{
+            "affiliation": "Dartmouth College, Hanover, NH, United States",
+            "name": "Meyer, Kyle"
+        },
+	{
+            "affiliation": "Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany",
+            "name": "Poldrack, Benjamin",
+            "orcid": "0000-0001-7628-0801"
+        },
+	{
+            "affiliation": "Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany",
+            "name": "Szczepanik, Michał",
+            "orcid": "0000-0002-4028-2087"
+        },
+	{
+	    "affiliation": "Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany",
+	    "name": "Waite, Laura K.",
+	    "orcid": "0000-0003-2213-7465"
+	}
+    ],
+    "keywords": [
+	"data management",
+	"data distribution",
+	"execution provenance tracking",
+	"version control"
+    ],
+    "access_right": "open",
+    "license": "MIT",
+    "upload_type": "software"
+}
diff --git a/COPYING b/LICENSE
similarity index 100%
rename from COPYING
rename to LICENSE
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..b9f76aa
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,6 @@
+include CONTRIBUTORS LICENSE versioneer.py
+include datalad_neuroimaging/_version.py
+graft _datalad_buildsupport
+graft docs
+prune docs/build
+global-exclude *.py[cod]
diff --git a/Makefile b/Makefile
index 82a427e..f575d2b 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ all: clean test
 
 clean:
 	$(PYTHON) setup.py clean
-	rm -rf dist build bin docs/build docs/source/generated
+	rm -rf dist build bin docs/build docs/source/generated *.egg-info
 	-find . -name '*.pyc' -delete
 	-find . -name '__pycache__' -type d -delete
 
@@ -40,13 +40,20 @@ update-changelog:
 	pandoc -t rst CHANGELOG.md >> docs/source/changelog.rst
 
 release-pypi: update-changelog
-	# better safe than sorry
+# better safe than sorry / avoid upload of stale builds
 	test ! -e dist
-	python setup.py sdist
-	python setup.py bdist_wheel --universal
+	python setup.py sdist bdist_wheel
 	twine upload dist/*
 
 render-casts: docs/source/usecases/simple_provenance_tracking.rst.in
 
 docs/source/usecases/reproducible_analysis.rst.in: build/casts/reproducible_analysis.json
 	tools/cast2rst $^ > $@
+
+update-buildsupport:
+	git subtree pull \
+		-m "Update DataLad build helper" \
+		--squash \
+		--prefix _datalad_buildsupport \
+		https://github.com/datalad/datalad-buildsupport.git \
+		master
diff --git a/_datalad_buildsupport/__init__.py b/_datalad_buildsupport/__init__.py
new file mode 100644
index 0000000..c91633a
--- /dev/null
+++ b/_datalad_buildsupport/__init__.py
@@ -0,0 +1,13 @@
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+#
+#   See COPYING file distributed along with the DataLad package for the
+#   copyright and license terms.
+#
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+"""Python package for functionality needed at package 'build' time by DataLad and its extensions
+
+__init__ here should be really minimalistic, not import submodules by default
+and submodules should also not require heavy dependencies.
+"""
+
+__version__ = '0.1'
diff --git a/_datalad_buildsupport/formatters.py b/_datalad_buildsupport/formatters.py
new file mode 100644
index 0000000..5ac01de
--- /dev/null
+++ b/_datalad_buildsupport/formatters.py
@@ -0,0 +1,314 @@
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+#
+#   See COPYING file distributed along with the DataLad package for the
+#   copyright and license terms.
+#
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+
+import argparse
+import datetime
+import re
+
+
+class ManPageFormatter(argparse.HelpFormatter):
+    # This code was originally distributed
+    # under the same License of Python
+    # Copyright (c) 2014 Oz Nahum Tiram  <nahumoz@gmail.com>
+    def __init__(self,
+                 prog,
+                 indent_increment=2,
+                 max_help_position=4,
+                 width=1000000,
+                 section=1,
+                 ext_sections=None,
+                 authors=None,
+                 version=None
+                 ):
+
+        super(ManPageFormatter, self).__init__(
+            prog,
+            indent_increment=indent_increment,
+            max_help_position=max_help_position,
+            width=width)
+
+        self._prog = prog
+        self._section = 1
+        self._today = datetime.date.today().strftime('%Y\\-%m\\-%d')
+        self._ext_sections = ext_sections
+        self._version = version
+
+    def _get_formatter(self, **kwargs):
+        return self.formatter_class(prog=self.prog, **kwargs)
+
+    def _markup(self, txt):
+        return txt.replace('-', '\\-')
+
+    def _underline(self, string):
+        return "\\fI\\s-1" + string + "\\s0\\fR"
+
+    def _bold(self, string):
+        if not string.strip().startswith('\\fB'):
+            string = '\\fB' + string
+        if not string.strip().endswith('\\fR'):
+            string = string + '\\fR'
+        return string
+
+    def _mk_synopsis(self, parser):
+        self.add_usage(parser.usage, parser._actions,
+                       parser._mutually_exclusive_groups, prefix='')
+        usage = self._format_usage(None, parser._actions,
+                                   parser._mutually_exclusive_groups, '')
+        # replace too long list of commands with a single placeholder
+        usage = re.sub(r'{[^]]*?create,.*?}', ' COMMAND ', usage, flags=re.MULTILINE)
+        # take care of proper wrapping
+        usage = re.sub(r'\[([-a-zA-Z0-9]*)\s([a-zA-Z0-9{}|_]*)\]', r'[\1\~\2]', usage)
+
+        usage = usage.replace('%s ' % self._prog, '')
+        usage = '.SH SYNOPSIS\n.nh\n.HP\n\\fB%s\\fR %s\n.hy\n' % (self._markup(self._prog),
+                                                    usage)
+        return usage
+
+    def _mk_title(self, prog):
+        name_version = "{0} {1}".format(prog, self._version)
+        return '.TH "{0}" "{1}" "{2}" "{3}"\n'.format(
+            prog, self._section, self._today, name_version)
+
+    def _mk_name(self, prog, desc):
+        """
+        this method is in consitent with others ... it relies on
+        distribution
+        """
+        desc = desc.splitlines()[0] if desc else 'it is in the name'
+        # ensure starting lower case
+        desc = desc[0].lower() + desc[1:]
+        return '.SH NAME\n%s \\- %s\n' % (self._bold(prog), desc)
+
+    def _mk_description(self, parser):
+        desc = parser.description
+        desc = '\n'.join(desc.splitlines()[1:])
+        if not desc:
+            return ''
+        desc = desc.replace('\n\n', '\n.PP\n')
+        # sub-section headings
+        desc = re.sub(r'^\*(.*)\*$', r'.SS \1', desc, flags=re.MULTILINE)
+        # italic commands
+        desc = re.sub(r'^  ([-a-z]*)$', r'.TP\n\\fI\1\\fR', desc, flags=re.MULTILINE)
+        # deindent body text, leave to troff viewer
+        desc = re.sub(r'^      (\S.*)\n', '\\1\n', desc, flags=re.MULTILINE)
+        # format NOTEs as indented paragraphs
+        desc = re.sub(r'^NOTE\n', '.TP\nNOTE\n', desc, flags=re.MULTILINE)
+        # deindent indented paragraphs after heading setup
+        desc = re.sub(r'^  (.*)$', '\\1', desc, flags=re.MULTILINE)
+
+        return '.SH DESCRIPTION\n%s\n' % self._markup(desc)
+
+    def _mk_footer(self, sections):
+        if not hasattr(sections, '__iter__'):
+            return ''
+
+        footer = []
+        for section, value in sections.items():
+            part = ".SH {}\n {}".format(section.upper(), value)
+            footer.append(part)
+
+        return '\n'.join(footer)
+
+    def format_man_page(self, parser):
+        page = []
+        page.append(self._mk_title(self._prog))
+        page.append(self._mk_name(self._prog, parser.description))
+        page.append(self._mk_synopsis(parser))
+        page.append(self._mk_description(parser))
+        page.append(self._mk_options(parser))
+        page.append(self._mk_footer(self._ext_sections))
+
+        return ''.join(page)
+
+    def _mk_options(self, parser):
+
+        formatter = parser._get_formatter()
+
+        # positionals, optionals and user-defined groups
+        for action_group in parser._action_groups:
+            formatter.start_section(None)
+            formatter.add_text(None)
+            formatter.add_arguments(action_group._group_actions)
+            formatter.end_section()
+
+        # epilog
+        formatter.add_text(parser.epilog)
+
+        # determine help from format above
+        help = formatter.format_help()
+        # add spaces after comma delimiters for easier reformatting
+        help = re.sub(r'([a-z]),([a-z])', '\\1, \\2', help)
+        # get proper indentation for argument items
+        help = re.sub(r'^  (\S.*)\n', '.TP\n\\1\n', help, flags=re.MULTILINE)
+        # deindent body text, leave to troff viewer
+        help = re.sub(r'^    (\S.*)\n', '\\1\n', help, flags=re.MULTILINE)
+        return '.SH OPTIONS\n' + help
+
+    def _format_action_invocation(self, action, doubledash='--'):
+        if not action.option_strings:
+            metavar, = self._metavar_formatter(action, action.dest)(1)
+            return metavar
+
+        else:
+            parts = []
+
+            # if the Optional doesn't take a value, format is:
+            #    -s, --long
+            if action.nargs == 0:
+                parts.extend([self._bold(action_str) for action_str in
+                              action.option_strings])
+
+            # if the Optional takes a value, format is:
+            #    -s ARGS, --long ARGS
+            else:
+                default = self._underline(action.dest.upper())
+                args_string = self._format_args(action, default)
+                for option_string in action.option_strings:
+                    parts.append('%s %s' % (self._bold(option_string),
+                                            args_string))
+
+            return ', '.join(p.replace('--', doubledash) for p in parts)
+
+
+class RSTManPageFormatter(ManPageFormatter):
+    def _get_formatter(self, **kwargs):
+        return self.formatter_class(prog=self.prog, **kwargs)
+
+    def _markup(self, txt):
+        # put general tune-ups here
+        return txt
+
+    def _underline(self, string):
+        return "*{0}*".format(string)
+
+    def _bold(self, string):
+        return "**{0}**".format(string)
+
+    def _mk_synopsis(self, parser):
+        self.add_usage(parser.usage, parser._actions,
+                       parser._mutually_exclusive_groups, prefix='')
+        usage = self._format_usage(None, parser._actions,
+                                   parser._mutually_exclusive_groups, '')
+
+        usage = usage.replace('%s ' % self._prog, '')
+        usage = 'Synopsis\n--------\n::\n\n  %s %s\n' \
+                % (self._markup(self._prog), usage)
+        return usage
+
+    def _mk_title(self, prog):
+        # and an easy to use reference point
+        title = ".. _man_%s:\n\n" % prog.replace(' ', '-')
+        title += "{0}".format(prog)
+        title += '\n{0}\n\n'.format('=' * len(prog))
+        return title
+
+    def _mk_name(self, prog, desc):
+        return ''
+
+    def _mk_description(self, parser):
+        desc = parser.description
+        if not desc:
+            return ''
+        return 'Description\n-----------\n%s\n' % self._markup(desc)
+
+    def _mk_footer(self, sections):
+        if not hasattr(sections, '__iter__'):
+            return ''
+
+        footer = []
+        for section, value in sections.items():
+            part = "\n{0}\n{1}\n{2}\n".format(
+                section,
+                '-' * len(section),
+                value)
+            footer.append(part)
+
+        return '\n'.join(footer)
+
+    def _mk_options(self, parser):
+
+        # this non-obvious maneuver is really necessary!
+        formatter = self.__class__(self._prog)
+
+        # positionals, optionals and user-defined groups
+        for action_group in parser._action_groups:
+            formatter.start_section(None)
+            formatter.add_text(None)
+            formatter.add_arguments(action_group._group_actions)
+            formatter.end_section()
+
+        # epilog
+        formatter.add_text(parser.epilog)
+
+        # determine help from format above
+        option_sec = formatter.format_help()
+
+        return '\n\nOptions\n-------\n{0}'.format(option_sec)
+
+    def _format_action(self, action):
+        # determine the required width and the entry label
+        action_header = self._format_action_invocation(action)
+
+        if action.help:
+            help_text = self._expand_help(action)
+            help_lines = self._split_lines(help_text, 80)
+            help = ' '.join(help_lines)
+        else:
+            help = ''
+
+        # return a single string
+        return '{0}\n{1}\n{2}\n\n'.format(
+            action_header,
+
+            '~' * len(action_header),
+            help)
+
+
+def cmdline_example_to_rst(src, out=None, ref=None):
+    if out is None:
+        from io import StringIO
+        out = StringIO()
+
+    # place header
+    out.write('.. AUTO-GENERATED FILE -- DO NOT EDIT!\n\n')
+    if ref:
+        # place cross-ref target
+        out.write('.. {0}:\n\n'.format(ref))
+
+    # parser status vars
+    inexample = False
+    incodeblock = False
+
+    for line in src:
+        if line.startswith('#% EXAMPLE START'):
+            inexample = True
+            incodeblock = False
+            continue
+        if not inexample:
+            continue
+        if line.startswith('#% EXAMPLE END'):
+            break
+        if not inexample:
+            continue
+        if line.startswith('#%'):
+            incodeblock = not incodeblock
+            if incodeblock:
+                out.write('\n.. code-block:: sh\n\n')
+            continue
+        if not incodeblock and line.startswith('#'):
+            out.write(line[(min(2, len(line) - 1)):])
+            continue
+        if incodeblock:
+            if not line.rstrip().endswith('#% SKIP'):
+                out.write('  %s' % line)
+            continue
+        if not len(line.strip()):
+            continue
+        else:
+            raise RuntimeError("this should not happen")
+
+    return out
diff --git a/_datalad_buildsupport/setup.py b/_datalad_buildsupport/setup.py
new file mode 100644
index 0000000..a4b92ed
--- /dev/null
+++ b/_datalad_buildsupport/setup.py
@@ -0,0 +1,254 @@
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+#
+#   See COPYING file distributed along with the DataLad package for the
+#   copyright and license terms.
+#
+# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
+
+
+import datetime
+import os
+
+from os.path import (
+    dirname,
+    join as opj,
+)
+from setuptools import Command, DistutilsOptionError
+from setuptools.config import read_configuration
+
+import versioneer
+
+from . import formatters as fmt
+
+
+class BuildManPage(Command):
+    # The BuildManPage code was originally distributed
+    # under the same License of Python
+    # Copyright (c) 2014 Oz Nahum Tiram  <nahumoz@gmail.com>
+
+    description = 'Generate man page from an ArgumentParser instance.'
+
+    user_options = [
+        ('manpath=', None,
+         'output path for manpages (relative paths are relative to the '
+         'datalad package)'),
+        ('rstpath=', None,
+         'output path for RST files (relative paths are relative to the '
+         'datalad package)'),
+        ('parser=', None, 'module path to an ArgumentParser instance'
+         '(e.g. mymod:func, where func is a method or function which return'
+         'a dict with one or more arparse.ArgumentParser instances.'),
+        ('cmdsuite=', None, 'module path to an extension command suite '
+         '(e.g. mymod:command_suite) to limit the build to the contained '
+         'commands.'),
+    ]
+
+    def initialize_options(self):
+        self.manpath = opj('build', 'man')
+        self.rstpath = opj('docs', 'source', 'generated', 'man')
+        self.parser = 'datalad.cmdline.main:setup_parser'
+        self.cmdsuite = None
+
+    def finalize_options(self):
+        if self.manpath is None:
+            raise DistutilsOptionError('\'manpath\' option is required')
+        if self.rstpath is None:
+            raise DistutilsOptionError('\'rstpath\' option is required')
+        if self.parser is None:
+            raise DistutilsOptionError('\'parser\' option is required')
+        mod_name, func_name = self.parser.split(':')
+        fromlist = mod_name.split('.')
+        try:
+            mod = __import__(mod_name, fromlist=fromlist)
+            self._parser = getattr(mod, func_name)(
+                ['datalad'],
+                formatter_class=fmt.ManPageFormatter,
+                return_subparsers=True,
+                # ignore extensions only for the main package to avoid pollution
+                # with all extension commands that happen to be installed
+                help_ignore_extensions=self.distribution.get_name() == 'datalad')
+
+        except ImportError as err:
+            raise err
+        if self.cmdsuite:
+            mod_name, suite_name = self.cmdsuite.split(':')
+            mod = __import__(mod_name, fromlist=mod_name.split('.'))
+            suite = getattr(mod, suite_name)
+            self.cmdlist = [c[2] if len(c) > 2 else c[1].replace('_', '-').lower()
+                            for c in suite[1]]
+
+        self.announce('Writing man page(s) to %s' % self.manpath)
+        self._today = datetime.date.today()
+
+    @classmethod
+    def handle_module(cls, mod_name, **kwargs):
+        """Module specific handling.
+
+        This particular one does
+        1. Memorize (at class level) the module name of interest here
+        2. Check if 'datalad.extensions' are specified for the module,
+           and then analyzes them to obtain command names it provides
+
+        If cmdline commands are found, its entries are to be used instead of
+        the ones in datalad's _parser.
+
+        Parameters
+        ----------
+        **kwargs:
+            all the kwargs which might be provided to setuptools.setup
+        """
+        cls.mod_name = mod_name
+
+        exts = kwargs.get('entry_points', {}).get('datalad.extensions', [])
+        for ext in exts:
+            assert '=' in ext      # should be label=module:obj
+            ext_label, mod_obj = ext.split('=', 1)
+            assert ':' in mod_obj  # should be module:obj
+            mod, obj = mod_obj.split(':', 1)
+            assert mod_name == mod  # AFAIK should be identical
+
+            mod = __import__(mod_name)
+            if hasattr(mod, obj):
+                command_suite = getattr(mod, obj)
+                assert len(command_suite) == 2  # as far as I see it
+                if not hasattr(cls, 'cmdline_names'):
+                    cls.cmdline_names = []
+                cls.cmdline_names += [
+                    cmd
+                    for _, _, cmd, _ in command_suite[1]
+                ]
+
+    def run(self):
+
+        dist = self.distribution
+        #homepage = dist.get_url()
+        #appname = self._parser.prog
+        appname = 'datalad'
+
+        cfg = read_configuration(
+            opj(dirname(dirname(__file__)), 'setup.cfg'))['metadata']
+
+        sections = {
+            'Authors': """{0} is developed by {1} <{2}>.""".format(
+                appname, cfg['author'], cfg['author_email']),
+        }
+
+        for cls, opath, ext in ((fmt.ManPageFormatter, self.manpath, '1'),
+                                (fmt.RSTManPageFormatter, self.rstpath, 'rst')):
+            if not os.path.exists(opath):
+                os.makedirs(opath)
+            for cmdname in getattr(self, 'cmdline_names', list(self._parser)):
+                if hasattr(self, 'cmdlist') and cmdname not in self.cmdlist:
+                    continue
+                p = self._parser[cmdname]
+                cmdname = "{0}{1}".format(
+                    'datalad ' if cmdname != 'datalad' else '',
+                    cmdname)
+                format = cls(
+                    cmdname,
+                    ext_sections=sections,
+                    version=versioneer.get_version())
+                formatted = format.format_man_page(p)
+                with open(opj(opath, '{0}.{1}'.format(
+                        cmdname.replace(' ', '-'),
+                        ext)),
+                        'w') as f:
+                    f.write(formatted)
+
+
+class BuildRSTExamplesFromScripts(Command):
+    description = 'Generate RST variants of example shell scripts.'
+
+    user_options = [
+        ('expath=', None, 'path to look for example scripts'),
+        ('rstpath=', None, 'output path for RST files'),
+    ]
+
+    def initialize_options(self):
+        self.expath = opj('docs', 'examples')
+        self.rstpath = opj('docs', 'source', 'generated', 'examples')
+
+    def finalize_options(self):
+        if self.expath is None:
+            raise DistutilsOptionError('\'expath\' option is required')
+        if self.rstpath is None:
+            raise DistutilsOptionError('\'rstpath\' option is required')
+        self.announce('Converting example scripts')
+
+    def run(self):
+        opath = self.rstpath
+        if not os.path.exists(opath):
+            os.makedirs(opath)
+
+        from glob import glob
+        for example in glob(opj(self.expath, '*.sh')):
+            exname = os.path.basename(example)[:-3]
+            with open(opj(opath, '{0}.rst'.format(exname)), 'w') as out:
+                fmt.cmdline_example_to_rst(
+                    open(example),
+                    out=out,
+                    ref='_example_{0}'.format(exname))
+
+
+class BuildConfigInfo(Command):
+    description = 'Generate RST documentation for all config items.'
+
+    user_options = [
+        ('rstpath=', None, 'output path for RST file'),
+    ]
+
+    def initialize_options(self):
+        self.rstpath = opj('docs', 'source', 'generated', 'cfginfo')
+
+    def finalize_options(self):
+        if self.rstpath is None:
+            raise DistutilsOptionError('\'rstpath\' option is required')
+        self.announce('Generating configuration documentation')
+
+    def run(self):
+        opath = self.rstpath
+        if not os.path.exists(opath):
+            os.makedirs(opath)
+
+        from datalad.interface.common_cfg import definitions as cfgdefs
+        from datalad.dochelpers import _indent
+
+        categories = {
+            'global': {},
+            'local': {},
+            'dataset': {},
+            'misc': {}
+        }
+        for term, v in cfgdefs.items():
+            categories[v.get('destination', 'misc')][term] = v
+
+        for cat in categories:
+            with open(opj(opath, '{}.rst.in'.format(cat)), 'w') as rst:
+                rst.write('.. glossary::\n')
+                for term, v in sorted(categories[cat].items(), key=lambda x: x[0]):
+                    rst.write(_indent(term, '\n  '))
+                    qtype, docs = v.get('ui', (None, {}))
+                    desc_tmpl = '\n'
+                    if 'title' in docs:
+                        desc_tmpl += '{title}:\n'
+                    if 'text' in docs:
+                        desc_tmpl += '{text}\n'
+                    if 'default' in v:
+                        default = v['default']
+                        if hasattr(default, 'replace'):
+                            # protect against leaking specific home dirs
+                            v['default'] = default.replace(os.path.expanduser('~'), '~')
+                        desc_tmpl += 'Default: {default}\n'
+                    if 'type' in v:
+                        type_ = v['type']
+                        if hasattr(type_, 'long_description'):
+                            type_ = type_.long_description()
+                        else:
+                            type_ = type_.__name__
+                        desc_tmpl += '\n[{type}]\n'
+                        v['type'] = type_
+                    if desc_tmpl == '\n':
+                        # we need something to avoid joining terms
+                        desc_tmpl += 'undocumented\n'
+                    v.update(docs)
+                    rst.write(_indent(desc_tmpl.format(**v), '    '))
diff --git a/datalad_neuroimaging/__init__.py b/datalad_neuroimaging/__init__.py
index 6d11094..52f0cf0 100644
--- a/datalad_neuroimaging/__init__.py
+++ b/datalad_neuroimaging/__init__.py
@@ -24,3 +24,6 @@
 
 from datalad import setup_package
 from datalad import teardown_package
+
+from . import _version
+__version__ = _version.get_versions()['version']
diff --git a/datalad_neuroimaging/_version.py b/datalad_neuroimaging/_version.py
new file mode 100644
index 0000000..78df7da
--- /dev/null
+++ b/datalad_neuroimaging/_version.py
@@ -0,0 +1,644 @@
+
+# This file helps to compute a version number in source trees obtained from
+# git-archive tarball (such as those provided by githubs download-from-tag
+# feature). Distribution tarballs (built by setup.py sdist) and build
+# directories (produced by setup.py build) will contain a much shorter file
+# that just contains the computed version number.
+
+# This file is released into the public domain. Generated by
+# versioneer-0.21 (https://github.com/python-versioneer/python-versioneer)
+
+"""Git implementation of _version.py."""
+
+import errno
+import os
+import re
+import subprocess
+import sys
+from typing import Callable, Dict
+
+
+def get_keywords():
+    """Get the keywords needed to look up the version information."""
+    # these strings will be replaced by git during git-archive.
+    # setup.py/versioneer.py will grep for the variable names, so they must
+    # each be defined on a line of their own. _version.py will just call
+    # get_keywords().
+    git_refnames = "$Format:%d$"
+    git_full = "$Format:%H$"
+    git_date = "$Format:%ci$"
+    keywords = {"refnames": git_refnames, "full": git_full, "date": git_date}
+    return keywords
+
+
+class VersioneerConfig:
+    """Container for Versioneer configuration parameters."""
+
+
+def get_config():
+    """Create, populate and return the VersioneerConfig() object."""
+    # these strings are filled in when 'setup.py versioneer' creates
+    # _version.py
+    cfg = VersioneerConfig()
+    cfg.VCS = "git"
+    cfg.style = "pep440"
+    cfg.tag_prefix = ""
+    cfg.parentdir_prefix = "None"
+    cfg.versionfile_source = "datalad_neuroimaging/_version.py"
+    cfg.verbose = False
+    return cfg
+
+
+class NotThisMethod(Exception):
+    """Exception raised if a method is not valid for the current scenario."""
+
+
+LONG_VERSION_PY: Dict[str, str] = {}
+HANDLERS: Dict[str, Dict[str, Callable]] = {}
+
+
+def register_vcs_handler(vcs, method):  # decorator
+    """Create decorator to mark a method as the handler of a VCS."""
+    def decorate(f):
+        """Store f in HANDLERS[vcs][method]."""
+        if vcs not in HANDLERS:
+            HANDLERS[vcs] = {}
+        HANDLERS[vcs][method] = f
+        return f
+    return decorate
+
+
+def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
+                env=None):
+    """Call the given command(s)."""
+    assert isinstance(commands, list)
+    process = None
+    for command in commands:
+        try:
+            dispcmd = str([command] + args)
+            # remember shell=False, so use git.cmd on windows, not just git
+            process = subprocess.Popen([command] + args, cwd=cwd, env=env,
+                                       stdout=subprocess.PIPE,
+                                       stderr=(subprocess.PIPE if hide_stderr
+                                               else None))
+            break
+        except OSError:
+            e = sys.exc_info()[1]
+            if e.errno == errno.ENOENT:
+                continue
+            if verbose:
+                print("unable to run %s" % dispcmd)
+                print(e)
+            return None, None
+    else:
+        if verbose:
+            print("unable to find command, tried %s" % (commands,))
+        return None, None
+    stdout = process.communicate()[0].strip().decode()
+    if process.returncode != 0:
+        if verbose:
+            print("unable to run %s (error)" % dispcmd)
+            print("stdout was %s" % stdout)
+        return None, process.returncode
+    return stdout, process.returncode
+
+
+def versions_from_parentdir(parentdir_prefix, root, verbose):
+    """Try to determine the version from the parent directory name.
+
+    Source tarballs conventionally unpack into a directory that includes both
+    the project name and a version string. We will also support searching up
+    two directory levels for an appropriately named parent directory
+    """
+    rootdirs = []
+
+    for _ in range(3):
+        dirname = os.path.basename(root)
+        if dirname.startswith(parentdir_prefix):
+            return {"version": dirname[len(parentdir_prefix):],
+                    "full-revisionid": None,
+                    "dirty": False, "error": None, "date": None}
+        rootdirs.append(root)
+        root = os.path.dirname(root)  # up a level
+
+    if verbose:
+        print("Tried directories %s but none started with prefix %s" %
+              (str(rootdirs), parentdir_prefix))
+    raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
+
+
+@register_vcs_handler("git", "get_keywords")
+def git_get_keywords(versionfile_abs):
+    """Extract version information from the given file."""
+    # the code embedded in _version.py can just fetch the value of these
+    # keywords. When used from setup.py, we don't want to import _version.py,
+    # so we do it with a regexp instead. This function is not used from
+    # _version.py.
+    keywords = {}
+    try:
+        with open(versionfile_abs, "r") as fobj:
+            for line in fobj:
+                if line.strip().startswith("git_refnames ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["refnames"] = mo.group(1)
+                if line.strip().startswith("git_full ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["full"] = mo.group(1)
+                if line.strip().startswith("git_date ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["date"] = mo.group(1)
+    except OSError:
+        pass
+    return keywords
+
+
+@register_vcs_handler("git", "keywords")
+def git_versions_from_keywords(keywords, tag_prefix, verbose):
+    """Get version information from git keywords."""
+    if "refnames" not in keywords:
+        raise NotThisMethod("Short version file found")
+    date = keywords.get("date")
+    if date is not None:
+        # Use only the last line.  Previous lines may contain GPG signature
+        # information.
+        date = date.splitlines()[-1]
+
+        # git-2.2.0 added "%cI", which expands to an ISO-8601 -compliant
+        # datestamp. However we prefer "%ci" (which expands to an "ISO-8601
+        # -like" string, which we must then edit to make compliant), because
+        # it's been around since git-1.5.3, and it's too difficult to
+        # discover which version we're using, or to work around using an
+        # older one.
+        date = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+    refnames = keywords["refnames"].strip()
+    if refnames.startswith("$Format"):
+        if verbose:
+            print("keywords are unexpanded, not using")
+        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
+    refs = {r.strip() for r in refnames.strip("()").split(",")}
+    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
+    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
+    TAG = "tag: "
+    tags = {r[len(TAG):] for r in refs if r.startswith(TAG)}
+    if not tags:
+        # Either we're using git < 1.8.3, or there really are no tags. We use
+        # a heuristic: assume all version tags have a digit. The old git %d
+        # expansion behaves like git log --decorate=short and strips out the
+        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
+        # between branches and tags. By ignoring refnames without digits, we
+        # filter out many common branch names like "release" and
+        # "stabilization", as well as "HEAD" and "master".
+        tags = {r for r in refs if re.search(r'\d', r)}
+        if verbose:
+            print("discarding '%s', no digits" % ",".join(refs - tags))
+    if verbose:
+        print("likely tags: %s" % ",".join(sorted(tags)))
+    for ref in sorted(tags):
+        # sorting will prefer e.g. "2.0" over "2.0rc1"
+        if ref.startswith(tag_prefix):
+            r = ref[len(tag_prefix):]
+            # Filter out refs that exactly match prefix or that don't start
+            # with a number once the prefix is stripped (mostly a concern
+            # when prefix is '')
+            if not re.match(r'\d', r):
+                continue
+            if verbose:
+                print("picking %s" % r)
+            return {"version": r,
+                    "full-revisionid": keywords["full"].strip(),
+                    "dirty": False, "error": None,
+                    "date": date}
+    # no suitable tags, so version is "0+unknown", but full hex is still there
+    if verbose:
+        print("no suitable tags, using unknown + full revision id")
+    return {"version": "0+unknown",
+            "full-revisionid": keywords["full"].strip(),
+            "dirty": False, "error": "no suitable tags", "date": None}
+
+
+@register_vcs_handler("git", "pieces_from_vcs")
+def git_pieces_from_vcs(tag_prefix, root, verbose, runner=run_command):
+    """Get version from 'git describe' in the root of the source tree.
+
+    This only gets called if the git-archive 'subst' keywords were *not*
+    expanded, and _version.py hasn't already been rewritten with a short
+    version string, meaning we're inside a checked out source tree.
+    """
+    GITS = ["git"]
+    TAG_PREFIX_REGEX = "*"
+    if sys.platform == "win32":
+        GITS = ["git.cmd", "git.exe"]
+        TAG_PREFIX_REGEX = r"\*"
+
+    _, rc = runner(GITS, ["rev-parse", "--git-dir"], cwd=root,
+                   hide_stderr=True)
+    if rc != 0:
+        if verbose:
+            print("Directory %s not under git control" % root)
+        raise NotThisMethod("'git rev-parse --git-dir' returned error")
+
+    # if there is a tag matching tag_prefix, this yields TAG-NUM-gHEX[-dirty]
+    # if there isn't one, this yields HEX[-dirty] (no NUM)
+    describe_out, rc = runner(GITS, ["describe", "--tags", "--dirty",
+                                     "--always", "--long",
+                                     "--match",
+                                     "%s%s" % (tag_prefix, TAG_PREFIX_REGEX)],
+                              cwd=root)
+    # --long was added in git-1.5.5
+    if describe_out is None:
+        raise NotThisMethod("'git describe' failed")
+    describe_out = describe_out.strip()
+    full_out, rc = runner(GITS, ["rev-parse", "HEAD"], cwd=root)
+    if full_out is None:
+        raise NotThisMethod("'git rev-parse' failed")
+    full_out = full_out.strip()
+
+    pieces = {}
+    pieces["long"] = full_out
+    pieces["short"] = full_out[:7]  # maybe improved later
+    pieces["error"] = None
+
+    branch_name, rc = runner(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
+                             cwd=root)
+    # --abbrev-ref was added in git-1.6.3
+    if rc != 0 or branch_name is None:
+        raise NotThisMethod("'git rev-parse --abbrev-ref' returned error")
+    branch_name = branch_name.strip()
+
+    if branch_name == "HEAD":
+        # If we aren't exactly on a branch, pick a branch which represents
+        # the current commit. If all else fails, we are on a branchless
+        # commit.
+        branches, rc = runner(GITS, ["branch", "--contains"], cwd=root)
+        # --contains was added in git-1.5.4
+        if rc != 0 or branches is None:
+            raise NotThisMethod("'git branch --contains' returned error")
+        branches = branches.split("\n")
+
+        # Remove the first line if we're running detached
+        if "(" in branches[0]:
+            branches.pop(0)
+
+        # Strip off the leading "* " from the list of branches.
+        branches = [branch[2:] for branch in branches]
+        if "master" in branches:
+            branch_name = "master"
+        elif not branches:
+            branch_name = None
+        else:
+            # Pick the first branch that is returned. Good or bad.
+            branch_name = branches[0]
+
+    pieces["branch"] = branch_name
+
+    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
+    # TAG might have hyphens.
+    git_describe = describe_out
+
+    # look for -dirty suffix
+    dirty = git_describe.endswith("-dirty")
+    pieces["dirty"] = dirty
+    if dirty:
+        git_describe = git_describe[:git_describe.rindex("-dirty")]
+
+    # now we have TAG-NUM-gHEX or HEX
+
+    if "-" in git_describe:
+        # TAG-NUM-gHEX
+        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
+        if not mo:
+            # unparsable. Maybe git-describe is misbehaving?
+            pieces["error"] = ("unable to parse git-describe output: '%s'"
+                               % describe_out)
+            return pieces
+
+        # tag
+        full_tag = mo.group(1)
+        if not full_tag.startswith(tag_prefix):
+            if verbose:
+                fmt = "tag '%s' doesn't start with prefix '%s'"
+                print(fmt % (full_tag, tag_prefix))
+            pieces["error"] = ("tag '%s' doesn't start with prefix '%s'"
+                               % (full_tag, tag_prefix))
+            return pieces
+        pieces["closest-tag"] = full_tag[len(tag_prefix):]
+
+        # distance: number of commits since tag
+        pieces["distance"] = int(mo.group(2))
+
+        # commit: short hex revision ID
+        pieces["short"] = mo.group(3)
+
+    else:
+        # HEX: no tags
+        pieces["closest-tag"] = None
+        count_out, rc = runner(GITS, ["rev-list", "HEAD", "--count"], cwd=root)
+        pieces["distance"] = int(count_out)  # total number of commits
+
+    # commit date: see ISO-8601 comment in git_versions_from_keywords()
+    date = runner(GITS, ["show", "-s", "--format=%ci", "HEAD"], cwd=root)[0].strip()
+    # Use only the last line.  Previous lines may contain GPG signature
+    # information.
+    date = date.splitlines()[-1]
+    pieces["date"] = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+
+    return pieces
+
+
+def plus_or_dot(pieces):
+    """Return a + if we don't already have one, else return a ."""
+    if "+" in pieces.get("closest-tag", ""):
+        return "."
+    return "+"
+
+
+def render_pep440(pieces):
+    """Build up version string, with post-release "local version identifier".
+
+    Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
+    get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
+
+    Exceptions:
+    1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += plus_or_dot(pieces)
+            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0+untagged.%d.g%s" % (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_branch(pieces):
+    """TAG[[.dev0]+DISTANCE.gHEX[.dirty]] .
+
+    The ".dev0" means not master branch. Note that .dev0 sorts backwards
+    (a feature branch will appear "older" than the master branch).
+
+    Exceptions:
+    1: no tags. 0[.dev0]+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0"
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+untagged.%d.g%s" % (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def pep440_split_post(ver):
+    """Split pep440 version string at the post-release segment.
+
+    Returns the release segments before the post-release and the
+    post-release version number (or -1 if no post-release segment is present).
+    """
+    vc = str.split(ver, ".post")
+    return vc[0], int(vc[1] or 0) if len(vc) == 2 else None
+
+
+def render_pep440_pre(pieces):
+    """TAG[.postN.devDISTANCE] -- No -dirty.
+
+    Exceptions:
+    1: no tags. 0.post0.devDISTANCE
+    """
+    if pieces["closest-tag"]:
+        if pieces["distance"]:
+            # update the post release segment
+            tag_version, post_version = pep440_split_post(pieces["closest-tag"])
+            rendered = tag_version
+            if post_version is not None:
+                rendered += ".post%d.dev%d" % (post_version+1, pieces["distance"])
+            else:
+                rendered += ".post0.dev%d" % (pieces["distance"])
+        else:
+            # no commits, use the tag as the version
+            rendered = pieces["closest-tag"]
+    else:
+        # exception #1
+        rendered = "0.post0.dev%d" % pieces["distance"]
+    return rendered
+
+
+def render_pep440_post(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX] .
+
+    The ".dev0" means dirty. Note that .dev0 sorts backwards
+    (a dirty tree will appear "older" than the corresponding clean one),
+    but you shouldn't be releasing software with -dirty anyways.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%s" % pieces["short"]
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+        rendered += "+g%s" % pieces["short"]
+    return rendered
+
+
+def render_pep440_post_branch(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX[.dirty]] .
+
+    The ".dev0" means not master branch.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]+gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%s" % pieces["short"]
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+g%s" % pieces["short"]
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_old(pieces):
+    """TAG[.postDISTANCE[.dev0]] .
+
+    The ".dev0" means dirty.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+    return rendered
+
+
+def render_git_describe(pieces):
+    """TAG[-DISTANCE-gHEX][-dirty].
+
+    Like 'git describe --tags --dirty --always'.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"]:
+            rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render_git_describe_long(pieces):
+    """TAG-DISTANCE-gHEX[-dirty].
+
+    Like 'git describe --tags --dirty --always -long'.
+    The distance/hash is unconditional.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render(pieces, style):
+    """Render the given version pieces into the requested style."""
+    if pieces["error"]:
+        return {"version": "unknown",
+                "full-revisionid": pieces.get("long"),
+                "dirty": None,
+                "error": pieces["error"],
+                "date": None}
+
+    if not style or style == "default":
+        style = "pep440"  # the default
+
+    if style == "pep440":
+        rendered = render_pep440(pieces)
+    elif style == "pep440-branch":
+        rendered = render_pep440_branch(pieces)
+    elif style == "pep440-pre":
+        rendered = render_pep440_pre(pieces)
+    elif style == "pep440-post":
+        rendered = render_pep440_post(pieces)
+    elif style == "pep440-post-branch":
+        rendered = render_pep440_post_branch(pieces)
+    elif style == "pep440-old":
+        rendered = render_pep440_old(pieces)
+    elif style == "git-describe":
+        rendered = render_git_describe(pieces)
+    elif style == "git-describe-long":
+        rendered = render_git_describe_long(pieces)
+    else:
+        raise ValueError("unknown style '%s'" % style)
+
+    return {"version": rendered, "full-revisionid": pieces["long"],
+            "dirty": pieces["dirty"], "error": None,
+            "date": pieces.get("date")}
+
+
+def get_versions():
+    """Get version information or return default if unable to do so."""
+    # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
+    # __file__, we can work backwards from there to the root. Some
+    # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
+    # case we can only use expanded keywords.
+
+    cfg = get_config()
+    verbose = cfg.verbose
+
+    try:
+        return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
+                                          verbose)
+    except NotThisMethod:
+        pass
+
+    try:
+        root = os.path.realpath(__file__)
+        # versionfile_source is the relative path from the top of the source
+        # tree (where the .git directory might live) to this file. Invert
+        # this to find the root from __file__.
+        for _ in cfg.versionfile_source.split('/'):
+            root = os.path.dirname(root)
+    except NameError:
+        return {"version": "0+unknown", "full-revisionid": None,
+                "dirty": None,
+                "error": "unable to find root of source tree",
+                "date": None}
+
+    try:
+        pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
+        return render(pieces, cfg.style)
+    except NotThisMethod:
+        pass
+
+    try:
+        if cfg.parentdir_prefix:
+            return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
+    except NotThisMethod:
+        pass
+
+    return {"version": "0+unknown", "full-revisionid": None,
+            "dirty": None,
+            "error": "unable to compute version", "date": None}
diff --git a/docs/Makefile b/docs/Makefile
index 92e10b7..ae10503 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,14 +3,14 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    = -W
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = python -m sphinx
 PAPER         =
 BUILDDIR      = build
 
 # User-friendly check for sphinx-build
-ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
-$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
-endif
+#ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
+#$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
+#endif
 
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
diff --git a/docs/README.md b/docs/README.md
new file mode 100644
index 0000000..d9d5ac4
--- /dev/null
+++ b/docs/README.md
@@ -0,0 +1,35 @@
+## Editing, building, and publishing extension documentation
+
+
+The `datalad-extension-template` uses [Sphinx](https://www.sphinx-doc.org/en/master/index.html#) for document generation
+and suggests using [Read the Docs](https://docs.readthedocs.io/en/stable/) for automatic documentation building, versioning, and hosting.
+
+Once you are ready to document your extension software, take note of the following:
+
+### Document editing
+
+Edit your `docs/source/index.rst` file using [reStructuredText](https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html),
+which is the default plaintext markup language used by Sphinx. Add further documentation as needed.
+
+### Local testing
+
+For testing locally whether your documentation builds and renders correctly, first install the developer requirements from the repository's root directory:
+```
+pip install -r requirements-devel.txt
+```
+
+Then build the documentation locally:
+```
+make -C docs html
+```
+
+Navigate to `docs/build/` and open `index.html` in your browser to view your documentation.
+
+### Remote building and testing
+
+The GitHub Action workflow located at `.github/workflows/docbuild.yml` will run on a push or pull request to your GitHub repository's master/main branch. This builds the documentation remotely and serves as an automated documentation test.
+
+### Publishing your documentation
+
+- If you maintain your extension yourself *outside of the scope of the DataLad GitHub organization*, you can follow [these instructions](https://docs.readthedocs.io/en/stable/integrations.html) for integrating your version control system (such as GitHub) with Read the Docs.
+- If your extension is *maintained by the DataLad developer team*, please create an issue asking for help with the setup.
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 049d8ef..d6fdb23 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -14,16 +14,24 @@
 
 import sys
 import os
-from os.path import join as opj, exists
-from os.path import dirname
+
+import datetime
+from os.path import (
+    abspath,
+    dirname,
+    exists,
+    join as opj,
+)
 from os import pardir
 
+import datalad_neuroimaging
+
 
 def setup(sphinx):
     sys.path.insert(0, os.path.abspath('utils'))  # travis
     sys.path.insert(0, os.path.abspath(opj(pardir, 'utils')))  # RTD
     from pygments_ansi_color import AnsiColorLexer
-    sphinx.add_lexer("ansi-color", AnsiColorLexer())
+    sphinx.add_lexer("ansi-color", AnsiColorLexer)
 
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -36,13 +44,30 @@ def setup(sphinx):
                       opj(pardir, pardir, 'setup.py')):  # RTD
     if exists(setup_py_path):
         sys.path.insert(0, os.path.abspath(dirname(setup_py_path)))
+
+        # Build manpage
         try:
-            for cmd in 'manpage', 'examples':
-                os.system('{} build_{}'.format(setup_py_path, cmd))
+            os.system(
+                '{} build_manpage --cmdsuite {} --manpath {} --rstpath {}'.format(
+                    setup_py_path,
+                    'datalad_neuroimaging:command_suite',
+                    abspath(opj(dirname(setup_py_path), 'build', 'man')),
+                    opj(dirname(__file__), 'generated', 'man')))
         except:
             # shut up and do your best
             pass
 
+        # Build examples - different set of arguments
+        try:
+            os.system(
+                '{} build_examples --expath {} --rstpath {}'.format(
+                    setup_py_path,
+                    abspath(opj(dirname(__file__), pardir, 'examples')),
+                    opj(dirname(__file__), 'generated', 'examples')))
+        except:
+            # like above
+            pass
+
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
@@ -76,25 +101,19 @@ def setup(sphinx):
 # source_suffix = ['.rst', '.md']
 source_suffix = '.rst'
 
-# The encoding of source files.
-#source_encoding = 'utf-8-sig'
-
 # The master toctree document.
 master_doc = 'index'
 
 # General information about the project.
 project = u'Datalad for neuroimaging'
-copyright = u'2016-2018, DataLad team'
+copyright = u'2018-{}, DataLad team'.format(datetime.datetime.now().year)
 author = u'DataLad team'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
-#
-# The short X.Y version.
-version = '0.1'
-# The full version, including alpha/beta/rc tags.
-release = '0.1.0'
+version = datalad_neuroimaging.__version__
+release = version
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -103,159 +122,50 @@ def setup(sphinx):
 # Usually you set "language" from the command line for these cases.
 language = None
 
-# There are two options for replacing |today|: either, you set today to some
-# non-false value, then it is used:
-#today = ''
-# Else, today_fmt is used as the format for a strftime call.
-#today_fmt = '%B %d, %Y'
-
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 exclude_patterns = []
 
-# The reST default role (used for this markup: `text`) to use for all
-# documents.
-#default_role = None
-
-# If true, '()' will be appended to :func: etc. cross-reference text.
-#add_function_parentheses = True
-
-# If true, the current module name will be prepended to all description
-# unit titles (such as .. function::).
-#add_module_names = True
-
-# If true, sectionauthor and moduleauthor directives will be shown in the
-# output. They are ignored by default.
-#show_authors = False
-
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
-# A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
-
-# If true, keep warnings as "system message" paragraphs in the built documents.
-#keep_warnings = False
-
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = True
 
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {'https://docs.python.org/': None}
+
+# smart quotes are incompatible with the RST flavor of the generated manpages
+# but see `smartquotes_action` for more fine-grained control, in case
+# some of this functionality is needed
+smartquotes = False
 
 # -- Options for HTML output ----------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-#html_theme = 'alabaster'
 html_theme = 'sphinx_rtd_theme'
 
-# Theme options are theme-specific and customize the look and feel of a theme
-# further.  For a list of options available for each theme, see the
-# documentation.
-#html_theme_options = {}
-
-# Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = []
-
-# The name for this set of Sphinx documents.  If None, it defaults to
-# "<project> v<release> documentation".
-#html_title = None
-
-# A shorter title for the navigation bar.  Default is the same as html_title.
-#html_short_title = None
-
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
 html_logo = '_static/datalad_logo.png'
 
-# The name of an image file (within the static path) to use as favicon of the
-# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
-# pixels large.
-#html_favicon = None
-
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
-# Add any extra paths that contain custom files (such as robots.txt or
-# .htaccess) here, relative to this directory. These files are copied
-# directly to the root of the documentation.
-#html_extra_path = ['_extras']
-
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-
-# If true, SmartyPants will be used to convert quotes and dashes to
-# typographically correct entities.
-#html_use_smartypants = True
-
-# Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
-
-# Additional templates that should be rendered to pages, maps page names to
-# template names.
-#html_additional_pages = {}
-
-# If false, no module index is generated.
-#html_domain_indices = True
-
-# If false, no index is generated.
-#html_use_index = True
-
 # If true, the index is split into individual pages for each letter.
 html_split_index = True
 
 # If true, links to the reST sources are added to the pages.
 html_show_sourcelink = False
 
-# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
-#html_show_sphinx = True
-
-# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
-#html_show_copyright = True
-
-# If true, an OpenSearch description file will be output, and all pages will
-# contain a <link> tag referring to it.  The value of this option must be the
-# base URL from which the finished HTML is served.
-#html_use_opensearch = ''
-
-# This is the file name suffix for HTML files (e.g. ".xhtml").
-#html_file_suffix = None
-
-# Language to be used for generating the HTML full-text search index.
-# Sphinx supports the following languages:
-#   'da', 'de', 'en', 'es', 'fi', 'fr', 'hu', 'it', 'ja'
-#   'nl', 'no', 'pt', 'ro', 'ru', 'sv', 'tr'
-#html_search_language = 'en'
-
-# A dictionary with options for the search language support, empty by default.
-# Now only 'ja' uses this config value
-#html_search_options = {'type': 'default'}
-
-# The name of a javascript file (relative to the configuration directory) that
-# implements a search results scorer. If empty, the default will be used.
-#html_search_scorer = 'scorer.js'
-
 # Output file base name for HTML help builder.
 htmlhelp_basename = 'datalad_neuroimagingdoc'
 
 # -- Options for LaTeX output ---------------------------------------------
 
-latex_elements = {
-# The paper size ('letterpaper' or 'a4paper').
-#'papersize': 'letterpaper',
-
-# The font size ('10pt', '11pt' or '12pt').
-#'pointsize': '10pt',
-
-# Additional stuff for the LaTeX preamble.
-#'preamble': '',
-
-# Latex figure (float) alignment
-#'figure_align': 'htbp',
-}
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
@@ -264,27 +174,6 @@ def setup(sphinx):
    u'DataLad team', 'manual'),
 ]
 
-# The name of an image file (relative to this directory) to place at the top of
-# the title page.
-#latex_logo = None
-
-# For "manual" documents, if this is true, then toplevel headings are parts,
-# not chapters.
-#latex_use_parts = False
-
-# If true, show page references after internal links.
-#latex_show_pagerefs = False
-
-# If true, show URL addresses after external links.
-#latex_show_urls = False
-
-# Documents to append as an appendix to all manuals.
-#latex_appendices = []
-
-# If false, no module index is generated.
-#latex_domain_indices = True
-
-
 # -- Options for manual page output ---------------------------------------
 
 # One entry per manual page. List of tuples
@@ -294,10 +183,6 @@ def setup(sphinx):
      [author], 1)
 ]
 
-# If true, show URL addresses after external links.
-#man_show_urls = False
-
-
 # -- Options for Texinfo output -------------------------------------------
 
 # Grouping the document tree into Texinfo files. List of tuples
@@ -308,19 +193,3 @@ def setup(sphinx):
    author, 'datalad', 'One line description of project.',
    'Miscellaneous'),
 ]
-
-# Documents to append as an appendix to all manuals.
-#texinfo_appendices = []
-
-# If false, no module index is generated.
-#texinfo_domain_indices = True
-
-# How to display URL addresses: 'footnote', 'no', or 'inline'.
-#texinfo_show_urls = 'footnote'
-
-# If true, do not generate a @detailmenu in the "Top" node's menu.
-#texinfo_no_detailmenu = False
-
-
-# Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
diff --git a/docs/source/index.rst b/docs/source/index.rst
index b4dfc65..8d8e087 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -18,10 +18,22 @@ Demos
 API
 ===
 
+High-level API commands
+-----------------------
+
+.. currentmodule:: datalad.api
+.. autosummary::
+   :toctree: generated
+
+   bids2scidata
+
+
+Command line reference
+----------------------
+
 .. toctree::
    :maxdepth: 1
 
-   modref
    generated/man/datalad-bids2scidata.rst
 
 
diff --git a/docs/source/modref.rst b/docs/source/modref.rst
deleted file mode 100644
index fdbb2c6..0000000
--- a/docs/source/modref.rst
+++ /dev/null
@@ -1,19 +0,0 @@
-.. -*- mode: rst -*-
-.. vi: set ft=rst sts=4 ts=4 sw=4 et tw=79:
-
-.. _chap_modref:
-
-***********************
-Python module reference
-***********************
-
-This module reference extends the manual with a comprehensive overview of the
-available functionality.  Each module in the package is documented by a general
-summary of its purpose and the list of classes and functions it provides.
-
-
-.. currentmodule:: datalad_neuroimaging
-.. autosummary::
-   :toctree: generated
-
-   bids2scidata
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..f671f35
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,2 @@
+[build-system]
+requires = ["setuptools >= 43.0.0", "wheel"]
diff --git a/requirements-devel.txt b/requirements-devel.txt
index 428a1dd..5db3241 100644
--- a/requirements-devel.txt
+++ b/requirements-devel.txt
@@ -1,3 +1,5 @@
--e .[devel]
-nose>=1.3.4
+# requirements for a development environment
+nose
 coverage
+sphinx
+sphinx_rtd_theme
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 3e1bc83..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-# If you want to develop, use requirements-devel.txt
-#git+https://github.com/datalad/datalad.git
-# not needed ATM
-#git+https://github.com/datalad/datalad-webapp.git
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..512b8bf
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,80 @@
+[metadata]
+name = datalad_neuroimaging
+url = https://github.com/datalad/datalad-neuroimaging
+author = The DataLad Team and Contributors
+author_email = team@datalad.org
+description = DataLad extension package for neuro/medical imaging
+long_description = file:README.md
+long_description_content_type = text/markdown; charset=UTF-8
+license = MIT
+classifiers =
+    Programming Language :: Python
+    License :: OSI Approved :: BSD License
+    Programming Language :: Python :: 3
+
+[options]
+zip_safe = False
+python_requires = >= 3.5
+install_requires =
+    datalad >= 0.12.0
+    pydicom  # DICOM metadata
+    pybids >= 0.9.2  # BIDS metadata
+    nibabel  # NIfTI metadata
+    pandas  # bids2scidata export
+packages = find:
+include_package_data = True
+
+[options.extras_require]
+# this matches the name used by -core and what is expected by some CI setups
+devel =
+    nose
+    coverage
+    pypandoc
+    sphinx >= 1.6.2
+    sphinx-rtd-theme
+    heudiconv
+devel-docs =
+    pypandoc
+    sphinx >= 1.6.2
+    sphinx-rtd-theme
+devel-downstream =
+    heudiconv
+
+[options.packages.find]
+# do not ship the build helpers
+include = datalad*
+exclude=
+    _datalad_buildsupport
+
+[options.entry_points]
+# 'datalad.extensions' is THE entrypoint inspected by the datalad API builders
+datalad.extensions =
+    # the label in front of '=' is the command suite label
+    # the entrypoint can point to any symbol of any name, as long it is
+    # valid datalad interface specification (see demo in this extensions)
+    neuroimaging = datalad_neuroimaging:command_suite
+datalad.webapps =
+    pork = webapp.app:Pork
+datalad.metadata.extractors =
+    bids = datalad_neuroimaging.extractors.bids:MetadataExtractor
+    dicom = datalad_neuroimaging.extractors.dicom:MetadataExtractor
+    nidm = datalad_neuroimaging.extractors.nidm:MetadataExtractor
+    nifti1 = datalad_neuroimaging.extractors.nifti1:MetadataExtractor
+datalad.tests =
+    neuroimaging = datalad_neuroimaging
+
+[versioneer]
+# See the docstring in versioneer.py for instructions. Note that you must
+# re-run 'versioneer.py setup' after changing this section, and commit the
+# resulting files.
+VCS = git
+style = pep440
+versionfile_source = datalad_neuroimaging/_version.py
+versionfile_build = datalad_neuroimaging/_version.py
+tag_prefix =
+
+[coverage:report]
+show_missing = True
+omit =
+    # versioneer code
+    datalad_neuroimaging/_version.py
diff --git a/setup.py b/setup.py
index 9b09abc..0df3ce8 100755
--- a/setup.py
+++ b/setup.py
@@ -1,17 +1,18 @@
 #!/usr/bin/env python
 
 from setuptools import setup
-from setuptools import find_packages
 from setuptools import findall
 
 from os.path import join as opj
 from os.path import sep as pathsep
 from os.path import splitext
-from os.path import dirname
 
-from setup_support import BuildManPage
-from setup_support import BuildRSTExamplesFromScripts
-from setup_support import get_version
+from _datalad_buildsupport.setup import (
+    BuildManPage,
+    BuildRSTExamplesFromScripts,
+)
+
+import versioneer
 
 
 def findsome(subdir, extensions):
@@ -24,90 +25,18 @@ def findsome(subdir, extensions):
         if splitext(f)[-1].lstrip('.') in extensions
     ]
 
-# extension version
-version = get_version()
 
 cmdclass = {
     'build_manpage': BuildManPage,
     'build_examples': BuildRSTExamplesFromScripts,
 }
 
-# PyPI doesn't render markdown yet. Workaround for a sane appearance
-# https://github.com/pypa/pypi-legacy/issues/148#issuecomment-227757822
-README = opj(dirname(__file__), 'README.md')
-try:
-    import pypandoc
-    long_description = pypandoc.convert(README, 'rst')
-except (ImportError, OSError) as exc:
-    # attempting to install pandoc via brew on OSX currently hangs and
-    # pypandoc imports but throws OSError demanding pandoc
-    print(
-        "WARNING: pypandoc failed to import or thrown an error while converting"
-        " README.md to RST: %r   .md version will be used as is" % exc
-    )
-    long_description = open(README).read()
-
-requires = {
-    'devel-docs': [
-        # used for converting README.md -> .rst for long_description
-        'pypandoc',
-        # Documentation
-        'sphinx>=1.6.2',
-        'sphinx-rtd-theme',
-    ],
-    'devel-downstream': [
-        # 3rd party modules which depend on datalad and we test against
-        'heudiconv',
-    ]
-}
-requires['devel'] = sum(list(requires.values()), [])
-
 
 setup(
-    # basic project properties can be set arbitrarily
-    name="datalad_neuroimaging",
-    author="The DataLad Team and Contributors",
-    author_email="team@datalad.org",
-    version=version,
-    description="DataLad extension package for neuro/medical imaging",
-    long_description=long_description,
-    zip_safe=False,
-    packages=[pkg for pkg in find_packages('.') if pkg.startswith('datalad')],
-    # datalad command suite specs from here
-    install_requires=[
-        'datalad>=0.12',
-        #'datalad-webapp',
-        'pydicom',  # DICOM metadata
-        # >= 0.9.2 for https://github.com/bids-standard/pybids/pull/444
-        'pybids>=0.9.2',  # BIDS metadata
-        'nibabel',  # NIfTI metadata
-        'pandas',  # bids2scidata export
-    ],
-    extras_require=requires,
-    cmdclass=cmdclass,
+    version=versioneer.get_version(),
+    cmdclass=versioneer.get_cmdclass(cmdclass),
     package_data={
         'datalad_neuroimaging':
             findsome(opj('tests', 'data', 'files'), {'dcm', 'gz'}) +
             findsome('resources', {'py', 'txt'})},
-    entry_points = {
-        # 'datalad.extensions' is THE entrypoint inspected by the datalad API builders
-        'datalad.extensions': [
-            # the label in front of '=' is the command suite label
-            # the entrypoint can point to any symbol of any name, as long it is
-            # valid datalad interface specification (see demo in this extension)
-            'neuroimaging=datalad_neuroimaging:command_suite',
-        ],
-        'datalad.webapps': [
-            'pork=webapp.app:Pork',
-        ],
-        'datalad.metadata.extractors': [
-            'bids=datalad_neuroimaging.extractors.bids:MetadataExtractor',
-            'dicom=datalad_neuroimaging.extractors.dicom:MetadataExtractor',
-            'nidm=datalad_neuroimaging.extractors.nidm:MetadataExtractor',
-            'nifti1=datalad_neuroimaging.extractors.nifti1:MetadataExtractor',
-        ],
-        'datalad.tests': [
-            'neuroimaging=datalad_neuroimaging',
-        ],
-    },
 )
diff --git a/setup_support.py b/setup_support.py
deleted file mode 100644
index 3181dcc..0000000
--- a/setup_support.py
+++ /dev/null
@@ -1,141 +0,0 @@
-# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
-#
-#   See COPYING file distributed along with the DataLad package for the
-#   copyright and license terms.
-#
-# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
-
-
-import os
-from os.path import dirname, join as opj
-
-from distutils.core import Command
-from distutils.errors import DistutilsOptionError
-import datetime
-import formatters as fmt
-
-
-def _path_rel2file(p):
-    return opj(dirname(__file__), p)
-
-
-def get_version():
-    """Load version of datalad from version.py without entailing any imports
-    """
-    # This might entail lots of imports which might not yet be available
-    # so let's do ad-hoc parsing of the version.py
-    with open(opj(dirname(__file__), 'datalad_neuroimaging', 'version.py')) as f:
-        version_lines = list(filter(lambda x: x.startswith('__version__'), f))
-    assert (len(version_lines) == 1)
-    return version_lines[0].split('=')[1].strip(" '\"\t\n")
-
-
-class BuildManPage(Command):
-    # The BuildManPage code was originally distributed
-    # under the same License of Python
-    # Copyright (c) 2014 Oz Nahum Tiram  <nahumoz@gmail.com>
-
-    description = 'Generate man page from an ArgumentParser instance.'
-
-    user_options = [
-        ('manpath=', None, 'output path for manpages'),
-        ('rstpath=', None, 'output path for RST files'),
-        ('parser=', None, 'module path to an ArgumentParser instance'
-         '(e.g. mymod:func, where func is a method or function which return'
-         'a dict with one or more arparse.ArgumentParser instances.'),
-    ]
-
-    def initialize_options(self):
-        self.manpath = opj('build', 'man')
-        self.rstpath = opj('docs', 'source', 'generated', 'man')
-        self.parser = 'datalad.cmdline.main:setup_parser'
-
-    def finalize_options(self):
-        if self.manpath is None:
-            raise DistutilsOptionError('\'manpath\' option is required')
-        if self.rstpath is None:
-            raise DistutilsOptionError('\'rstpath\' option is required')
-        if self.parser is None:
-            raise DistutilsOptionError('\'parser\' option is required')
-        self.manpath = _path_rel2file(self.manpath)
-        self.rstpath = _path_rel2file(self.rstpath)
-        mod_name, func_name = self.parser.split(':')
-        fromlist = mod_name.split('.')
-        try:
-            mod = __import__(mod_name, fromlist=fromlist)
-            self._parser = getattr(mod, func_name)(
-                ['datalad'],
-                formatter_class=fmt.ManPageFormatter,
-                return_subparsers=True)
-
-        except ImportError as err:
-            raise err
-
-        self.announce('Writing man page(s) to %s' % self.manpath)
-        self._today = datetime.date.today()
-
-    def run(self):
-
-        dist = self.distribution
-        #homepage = dist.get_url()
-        #appname = self._parser.prog
-        appname = 'datalad'
-
-        sections = {
-            'Authors': """{0} is developed by {1} <{2}>.""".format(
-                appname, dist.get_author(), dist.get_author_email()),
-        }
-
-        dist = self.distribution
-        for cls, opath, ext in ((fmt.ManPageFormatter, self.manpath, '1'),
-                                (fmt.RSTManPageFormatter, self.rstpath, 'rst')):
-            if not os.path.exists(opath):
-                os.makedirs(opath)
-            for cmdname in ('bids2scidata',):
-                p = self._parser[cmdname]
-                cmdname = "{0}{1}".format(
-                    'datalad ' if cmdname != 'datalad' else '',
-                    cmdname)
-                format = cls(cmdname, ext_sections=sections, version=get_version())
-                formatted = format.format_man_page(p)
-                with open(opj(opath, '{0}.{1}'.format(
-                        cmdname.replace(' ', '-'),
-                        ext)),
-                        'w') as f:
-                    f.write(formatted)
-
-
-class BuildRSTExamplesFromScripts(Command):
-    description = 'Generate RST variants of example shell scripts.'
-
-    user_options = [
-        ('expath=', None, 'path to look for example scripts'),
-        ('rstpath=', None, 'output path for RST files'),
-    ]
-
-    def initialize_options(self):
-        self.expath = opj('docs', 'examples')
-        self.rstpath = opj('docs', 'source', 'generated', 'examples')
-
-    def finalize_options(self):
-        if self.expath is None:
-            raise DistutilsOptionError('\'expath\' option is required')
-        if self.rstpath is None:
-            raise DistutilsOptionError('\'rstpath\' option is required')
-        self.expath = _path_rel2file(self.expath)
-        self.rstpath = _path_rel2file(self.rstpath)
-        self.announce('Converting example scripts')
-
-    def run(self):
-        opath = self.rstpath
-        if not os.path.exists(opath):
-            os.makedirs(opath)
-
-        from glob import glob
-        for example in glob(opj(self.expath, '*.sh')):
-            exname = os.path.basename(example)[:-3]
-            with open(opj(opath, '{0}.rst'.format(exname)), 'w') as out:
-                fmt.cmdline_example_to_rst(
-                    open(example),
-                    out=out,
-                    ref='_example_{0}'.format(exname))
diff --git a/tools/ci/appveyor_env_setup.bat b/tools/ci/appveyor_env_setup.bat
new file mode 100644
index 0000000..d464901
--- /dev/null
+++ b/tools/ci/appveyor_env_setup.bat
@@ -0,0 +1,4 @@
+set PY=%1-x64
+set TMP=C:\DLTMP
+set TEMP=C:\DLTMP
+set PATH=C:\Python%PY%;C:\Python%PY%\Scripts;%PATH%
diff --git a/versioneer.py b/versioneer.py
new file mode 100644
index 0000000..6f929fd
--- /dev/null
+++ b/versioneer.py
@@ -0,0 +1,2112 @@
+
+# Version: 0.21
+
+"""The Versioneer - like a rocketeer, but for versions.
+
+The Versioneer
+==============
+
+* like a rocketeer, but for versions!
+* https://github.com/python-versioneer/python-versioneer
+* Brian Warner
+* License: Public Domain
+* Compatible with: Python 3.6, 3.7, 3.8, 3.9 and pypy3
+* [![Latest Version][pypi-image]][pypi-url]
+* [![Build Status][travis-image]][travis-url]
+
+This is a tool for managing a recorded version number in distutils-based
+python projects. The goal is to remove the tedious and error-prone "update
+the embedded version string" step from your release process. Making a new
+release should be as easy as recording a new tag in your version-control
+system, and maybe making new tarballs.
+
+
+## Quick Install
+
+* `pip install versioneer` to somewhere in your $PATH
+* add a `[versioneer]` section to your setup.cfg (see [Install](INSTALL.md))
+* run `versioneer install` in your source tree, commit the results
+* Verify version information with `python setup.py version`
+
+## Version Identifiers
+
+Source trees come from a variety of places:
+
+* a version-control system checkout (mostly used by developers)
+* a nightly tarball, produced by build automation
+* a snapshot tarball, produced by a web-based VCS browser, like github's
+  "tarball from tag" feature
+* a release tarball, produced by "setup.py sdist", distributed through PyPI
+
+Within each source tree, the version identifier (either a string or a number,
+this tool is format-agnostic) can come from a variety of places:
+
+* ask the VCS tool itself, e.g. "git describe" (for checkouts), which knows
+  about recent "tags" and an absolute revision-id
+* the name of the directory into which the tarball was unpacked
+* an expanded VCS keyword ($Id$, etc)
+* a `_version.py` created by some earlier build step
+
+For released software, the version identifier is closely related to a VCS
+tag. Some projects use tag names that include more than just the version
+string (e.g. "myproject-1.2" instead of just "1.2"), in which case the tool
+needs to strip the tag prefix to extract the version identifier. For
+unreleased software (between tags), the version identifier should provide
+enough information to help developers recreate the same tree, while also
+giving them an idea of roughly how old the tree is (after version 1.2, before
+version 1.3). Many VCS systems can report a description that captures this,
+for example `git describe --tags --dirty --always` reports things like
+"0.7-1-g574ab98-dirty" to indicate that the checkout is one revision past the
+0.7 tag, has a unique revision id of "574ab98", and is "dirty" (it has
+uncommitted changes).
+
+The version identifier is used for multiple purposes:
+
+* to allow the module to self-identify its version: `myproject.__version__`
+* to choose a name and prefix for a 'setup.py sdist' tarball
+
+## Theory of Operation
+
+Versioneer works by adding a special `_version.py` file into your source
+tree, where your `__init__.py` can import it. This `_version.py` knows how to
+dynamically ask the VCS tool for version information at import time.
+
+`_version.py` also contains `$Revision$` markers, and the installation
+process marks `_version.py` to have this marker rewritten with a tag name
+during the `git archive` command. As a result, generated tarballs will
+contain enough information to get the proper version.
+
+To allow `setup.py` to compute a version too, a `versioneer.py` is added to
+the top level of your source tree, next to `setup.py` and the `setup.cfg`
+that configures it. This overrides several distutils/setuptools commands to
+compute the version when invoked, and changes `setup.py build` and `setup.py
+sdist` to replace `_version.py` with a small static file that contains just
+the generated version data.
+
+## Installation
+
+See [INSTALL.md](./INSTALL.md) for detailed installation instructions.
+
+## Version-String Flavors
+
+Code which uses Versioneer can learn about its version string at runtime by
+importing `_version` from your main `__init__.py` file and running the
+`get_versions()` function. From the "outside" (e.g. in `setup.py`), you can
+import the top-level `versioneer.py` and run `get_versions()`.
+
+Both functions return a dictionary with different flavors of version
+information:
+
+* `['version']`: A condensed version string, rendered using the selected
+  style. This is the most commonly used value for the project's version
+  string. The default "pep440" style yields strings like `0.11`,
+  `0.11+2.g1076c97`, or `0.11+2.g1076c97.dirty`. See the "Styles" section
+  below for alternative styles.
+
+* `['full-revisionid']`: detailed revision identifier. For Git, this is the
+  full SHA1 commit id, e.g. "1076c978a8d3cfc70f408fe5974aa6c092c949ac".
+
+* `['date']`: Date and time of the latest `HEAD` commit. For Git, it is the
+  commit date in ISO 8601 format. This will be None if the date is not
+  available.
+
+* `['dirty']`: a boolean, True if the tree has uncommitted changes. Note that
+  this is only accurate if run in a VCS checkout, otherwise it is likely to
+  be False or None
+
+* `['error']`: if the version string could not be computed, this will be set
+  to a string describing the problem, otherwise it will be None. It may be
+  useful to throw an exception in setup.py if this is set, to avoid e.g.
+  creating tarballs with a version string of "unknown".
+
+Some variants are more useful than others. Including `full-revisionid` in a
+bug report should allow developers to reconstruct the exact code being tested
+(or indicate the presence of local changes that should be shared with the
+developers). `version` is suitable for display in an "about" box or a CLI
+`--version` output: it can be easily compared against release notes and lists
+of bugs fixed in various releases.
+
+The installer adds the following text to your `__init__.py` to place a basic
+version in `YOURPROJECT.__version__`:
+
+    from ._version import get_versions
+    __version__ = get_versions()['version']
+    del get_versions
+
+## Styles
+
+The setup.cfg `style=` configuration controls how the VCS information is
+rendered into a version string.
+
+The default style, "pep440", produces a PEP440-compliant string, equal to the
+un-prefixed tag name for actual releases, and containing an additional "local
+version" section with more detail for in-between builds. For Git, this is
+TAG[+DISTANCE.gHEX[.dirty]] , using information from `git describe --tags
+--dirty --always`. For example "0.11+2.g1076c97.dirty" indicates that the
+tree is like the "1076c97" commit but has uncommitted changes (".dirty"), and
+that this commit is two revisions ("+2") beyond the "0.11" tag. For released
+software (exactly equal to a known tag), the identifier will only contain the
+stripped tag, e.g. "0.11".
+
+Other styles are available. See [details.md](details.md) in the Versioneer
+source tree for descriptions.
+
+## Debugging
+
+Versioneer tries to avoid fatal errors: if something goes wrong, it will tend
+to return a version of "0+unknown". To investigate the problem, run `setup.py
+version`, which will run the version-lookup code in a verbose mode, and will
+display the full contents of `get_versions()` (including the `error` string,
+which may help identify what went wrong).
+
+## Known Limitations
+
+Some situations are known to cause problems for Versioneer. This details the
+most significant ones. More can be found on Github
+[issues page](https://github.com/python-versioneer/python-versioneer/issues).
+
+### Subprojects
+
+Versioneer has limited support for source trees in which `setup.py` is not in
+the root directory (e.g. `setup.py` and `.git/` are *not* siblings). The are
+two common reasons why `setup.py` might not be in the root:
+
+* Source trees which contain multiple subprojects, such as
+  [Buildbot](https://github.com/buildbot/buildbot), which contains both
+  "master" and "slave" subprojects, each with their own `setup.py`,
+  `setup.cfg`, and `tox.ini`. Projects like these produce multiple PyPI
+  distributions (and upload multiple independently-installable tarballs).
+* Source trees whose main purpose is to contain a C library, but which also
+  provide bindings to Python (and perhaps other languages) in subdirectories.
+
+Versioneer will look for `.git` in parent directories, and most operations
+should get the right version string. However `pip` and `setuptools` have bugs
+and implementation details which frequently cause `pip install .` from a
+subproject directory to fail to find a correct version string (so it usually
+defaults to `0+unknown`).
+
+`pip install --editable .` should work correctly. `setup.py install` might
+work too.
+
+Pip-8.1.1 is known to have this problem, but hopefully it will get fixed in
+some later version.
+
+[Bug #38](https://github.com/python-versioneer/python-versioneer/issues/38) is tracking
+this issue. The discussion in
+[PR #61](https://github.com/python-versioneer/python-versioneer/pull/61) describes the
+issue from the Versioneer side in more detail.
+[pip PR#3176](https://github.com/pypa/pip/pull/3176) and
+[pip PR#3615](https://github.com/pypa/pip/pull/3615) contain work to improve
+pip to let Versioneer work correctly.
+
+Versioneer-0.16 and earlier only looked for a `.git` directory next to the
+`setup.cfg`, so subprojects were completely unsupported with those releases.
+
+### Editable installs with setuptools <= 18.5
+
+`setup.py develop` and `pip install --editable .` allow you to install a
+project into a virtualenv once, then continue editing the source code (and
+test) without re-installing after every change.
+
+"Entry-point scripts" (`setup(entry_points={"console_scripts": ..})`) are a
+convenient way to specify executable scripts that should be installed along
+with the python package.
+
+These both work as expected when using modern setuptools. When using
+setuptools-18.5 or earlier, however, certain operations will cause
+`pkg_resources.DistributionNotFound` errors when running the entrypoint
+script, which must be resolved by re-installing the package. This happens
+when the install happens with one version, then the egg_info data is
+regenerated while a different version is checked out. Many setup.py commands
+cause egg_info to be rebuilt (including `sdist`, `wheel`, and installing into
+a different virtualenv), so this can be surprising.
+
+[Bug #83](https://github.com/python-versioneer/python-versioneer/issues/83) describes
+this one, but upgrading to a newer version of setuptools should probably
+resolve it.
+
+
+## Updating Versioneer
+
+To upgrade your project to a new release of Versioneer, do the following:
+
+* install the new Versioneer (`pip install -U versioneer` or equivalent)
+* edit `setup.cfg`, if necessary, to include any new configuration settings
+  indicated by the release notes. See [UPGRADING](./UPGRADING.md) for details.
+* re-run `versioneer install` in your source tree, to replace
+  `SRC/_version.py`
+* commit any changed files
+
+## Future Directions
+
+This tool is designed to make it easily extended to other version-control
+systems: all VCS-specific components are in separate directories like
+src/git/ . The top-level `versioneer.py` script is assembled from these
+components by running make-versioneer.py . In the future, make-versioneer.py
+will take a VCS name as an argument, and will construct a version of
+`versioneer.py` that is specific to the given VCS. It might also take the
+configuration arguments that are currently provided manually during
+installation by editing setup.py . Alternatively, it might go the other
+direction and include code from all supported VCS systems, reducing the
+number of intermediate scripts.
+
+## Similar projects
+
+* [setuptools_scm](https://github.com/pypa/setuptools_scm/) - a non-vendored build-time
+  dependency
+* [minver](https://github.com/jbweston/miniver) - a lightweight reimplementation of
+  versioneer
+* [versioningit](https://github.com/jwodder/versioningit) - a PEP 518-based setuptools
+  plugin
+
+## License
+
+To make Versioneer easier to embed, all its code is dedicated to the public
+domain. The `_version.py` that it creates is also in the public domain.
+Specifically, both are released under the Creative Commons "Public Domain
+Dedication" license (CC0-1.0), as described in
+https://creativecommons.org/publicdomain/zero/1.0/ .
+
+[pypi-image]: https://img.shields.io/pypi/v/versioneer.svg
+[pypi-url]: https://pypi.python.org/pypi/versioneer/
+[travis-image]:
+https://img.shields.io/travis/com/python-versioneer/python-versioneer.svg
+[travis-url]: https://travis-ci.com/github/python-versioneer/python-versioneer
+
+"""
+# pylint:disable=invalid-name,import-outside-toplevel,missing-function-docstring
+# pylint:disable=missing-class-docstring,too-many-branches,too-many-statements
+# pylint:disable=raise-missing-from,too-many-lines,too-many-locals,import-error
+# pylint:disable=too-few-public-methods,redefined-outer-name,consider-using-with
+# pylint:disable=attribute-defined-outside-init,too-many-arguments
+
+import configparser
+import errno
+import json
+import os
+import re
+import subprocess
+import sys
+from typing import Callable, Dict
+
+
+class VersioneerConfig:
+    """Container for Versioneer configuration parameters."""
+
+
+def get_root():
+    """Get the project root directory.
+
+    We require that all commands are run from the project root, i.e. the
+    directory that contains setup.py, setup.cfg, and versioneer.py .
+    """
+    root = os.path.realpath(os.path.abspath(os.getcwd()))
+    setup_py = os.path.join(root, "setup.py")
+    versioneer_py = os.path.join(root, "versioneer.py")
+    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
+        # allow 'python path/to/setup.py COMMAND'
+        root = os.path.dirname(os.path.realpath(os.path.abspath(sys.argv[0])))
+        setup_py = os.path.join(root, "setup.py")
+        versioneer_py = os.path.join(root, "versioneer.py")
+    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
+        err = ("Versioneer was unable to run the project root directory. "
+               "Versioneer requires setup.py to be executed from "
+               "its immediate directory (like 'python setup.py COMMAND'), "
+               "or in a way that lets it use sys.argv[0] to find the root "
+               "(like 'python path/to/setup.py COMMAND').")
+        raise VersioneerBadRootError(err)
+    try:
+        # Certain runtime workflows (setup.py install/develop in a setuptools
+        # tree) execute all dependencies in a single python process, so
+        # "versioneer" may be imported multiple times, and python's shared
+        # module-import table will cache the first one. So we can't use
+        # os.path.dirname(__file__), as that will find whichever
+        # versioneer.py was first imported, even in later projects.
+        my_path = os.path.realpath(os.path.abspath(__file__))
+        me_dir = os.path.normcase(os.path.splitext(my_path)[0])
+        vsr_dir = os.path.normcase(os.path.splitext(versioneer_py)[0])
+        if me_dir != vsr_dir:
+            print("Warning: build in %s is using versioneer.py from %s"
+                  % (os.path.dirname(my_path), versioneer_py))
+    except NameError:
+        pass
+    return root
+
+
+def get_config_from_root(root):
+    """Read the project setup.cfg file to determine Versioneer config."""
+    # This might raise OSError (if setup.cfg is missing), or
+    # configparser.NoSectionError (if it lacks a [versioneer] section), or
+    # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
+    # the top of versioneer.py for instructions on writing your setup.cfg .
+    setup_cfg = os.path.join(root, "setup.cfg")
+    parser = configparser.ConfigParser()
+    with open(setup_cfg, "r") as cfg_file:
+        parser.read_file(cfg_file)
+    VCS = parser.get("versioneer", "VCS")  # mandatory
+
+    # Dict-like interface for non-mandatory entries
+    section = parser["versioneer"]
+
+    cfg = VersioneerConfig()
+    cfg.VCS = VCS
+    cfg.style = section.get("style", "")
+    cfg.versionfile_source = section.get("versionfile_source")
+    cfg.versionfile_build = section.get("versionfile_build")
+    cfg.tag_prefix = section.get("tag_prefix")
+    if cfg.tag_prefix in ("''", '""'):
+        cfg.tag_prefix = ""
+    cfg.parentdir_prefix = section.get("parentdir_prefix")
+    cfg.verbose = section.get("verbose")
+    return cfg
+
+
+class NotThisMethod(Exception):
+    """Exception raised if a method is not valid for the current scenario."""
+
+
+# these dictionaries contain VCS-specific tools
+LONG_VERSION_PY: Dict[str, str] = {}
+HANDLERS: Dict[str, Dict[str, Callable]] = {}
+
+
+def register_vcs_handler(vcs, method):  # decorator
+    """Create decorator to mark a method as the handler of a VCS."""
+    def decorate(f):
+        """Store f in HANDLERS[vcs][method]."""
+        HANDLERS.setdefault(vcs, {})[method] = f
+        return f
+    return decorate
+
+
+def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
+                env=None):
+    """Call the given command(s)."""
+    assert isinstance(commands, list)
+    process = None
+    for command in commands:
+        try:
+            dispcmd = str([command] + args)
+            # remember shell=False, so use git.cmd on windows, not just git
+            process = subprocess.Popen([command] + args, cwd=cwd, env=env,
+                                       stdout=subprocess.PIPE,
+                                       stderr=(subprocess.PIPE if hide_stderr
+                                               else None))
+            break
+        except OSError:
+            e = sys.exc_info()[1]
+            if e.errno == errno.ENOENT:
+                continue
+            if verbose:
+                print("unable to run %s" % dispcmd)
+                print(e)
+            return None, None
+    else:
+        if verbose:
+            print("unable to find command, tried %s" % (commands,))
+        return None, None
+    stdout = process.communicate()[0].strip().decode()
+    if process.returncode != 0:
+        if verbose:
+            print("unable to run %s (error)" % dispcmd)
+            print("stdout was %s" % stdout)
+        return None, process.returncode
+    return stdout, process.returncode
+
+
+LONG_VERSION_PY['git'] = r'''
+# This file helps to compute a version number in source trees obtained from
+# git-archive tarball (such as those provided by githubs download-from-tag
+# feature). Distribution tarballs (built by setup.py sdist) and build
+# directories (produced by setup.py build) will contain a much shorter file
+# that just contains the computed version number.
+
+# This file is released into the public domain. Generated by
+# versioneer-0.21 (https://github.com/python-versioneer/python-versioneer)
+
+"""Git implementation of _version.py."""
+
+import errno
+import os
+import re
+import subprocess
+import sys
+from typing import Callable, Dict
+
+
+def get_keywords():
+    """Get the keywords needed to look up the version information."""
+    # these strings will be replaced by git during git-archive.
+    # setup.py/versioneer.py will grep for the variable names, so they must
+    # each be defined on a line of their own. _version.py will just call
+    # get_keywords().
+    git_refnames = "%(DOLLAR)sFormat:%%d%(DOLLAR)s"
+    git_full = "%(DOLLAR)sFormat:%%H%(DOLLAR)s"
+    git_date = "%(DOLLAR)sFormat:%%ci%(DOLLAR)s"
+    keywords = {"refnames": git_refnames, "full": git_full, "date": git_date}
+    return keywords
+
+
+class VersioneerConfig:
+    """Container for Versioneer configuration parameters."""
+
+
+def get_config():
+    """Create, populate and return the VersioneerConfig() object."""
+    # these strings are filled in when 'setup.py versioneer' creates
+    # _version.py
+    cfg = VersioneerConfig()
+    cfg.VCS = "git"
+    cfg.style = "%(STYLE)s"
+    cfg.tag_prefix = "%(TAG_PREFIX)s"
+    cfg.parentdir_prefix = "%(PARENTDIR_PREFIX)s"
+    cfg.versionfile_source = "%(VERSIONFILE_SOURCE)s"
+    cfg.verbose = False
+    return cfg
+
+
+class NotThisMethod(Exception):
+    """Exception raised if a method is not valid for the current scenario."""
+
+
+LONG_VERSION_PY: Dict[str, str] = {}
+HANDLERS: Dict[str, Dict[str, Callable]] = {}
+
+
+def register_vcs_handler(vcs, method):  # decorator
+    """Create decorator to mark a method as the handler of a VCS."""
+    def decorate(f):
+        """Store f in HANDLERS[vcs][method]."""
+        if vcs not in HANDLERS:
+            HANDLERS[vcs] = {}
+        HANDLERS[vcs][method] = f
+        return f
+    return decorate
+
+
+def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
+                env=None):
+    """Call the given command(s)."""
+    assert isinstance(commands, list)
+    process = None
+    for command in commands:
+        try:
+            dispcmd = str([command] + args)
+            # remember shell=False, so use git.cmd on windows, not just git
+            process = subprocess.Popen([command] + args, cwd=cwd, env=env,
+                                       stdout=subprocess.PIPE,
+                                       stderr=(subprocess.PIPE if hide_stderr
+                                               else None))
+            break
+        except OSError:
+            e = sys.exc_info()[1]
+            if e.errno == errno.ENOENT:
+                continue
+            if verbose:
+                print("unable to run %%s" %% dispcmd)
+                print(e)
+            return None, None
+    else:
+        if verbose:
+            print("unable to find command, tried %%s" %% (commands,))
+        return None, None
+    stdout = process.communicate()[0].strip().decode()
+    if process.returncode != 0:
+        if verbose:
+            print("unable to run %%s (error)" %% dispcmd)
+            print("stdout was %%s" %% stdout)
+        return None, process.returncode
+    return stdout, process.returncode
+
+
+def versions_from_parentdir(parentdir_prefix, root, verbose):
+    """Try to determine the version from the parent directory name.
+
+    Source tarballs conventionally unpack into a directory that includes both
+    the project name and a version string. We will also support searching up
+    two directory levels for an appropriately named parent directory
+    """
+    rootdirs = []
+
+    for _ in range(3):
+        dirname = os.path.basename(root)
+        if dirname.startswith(parentdir_prefix):
+            return {"version": dirname[len(parentdir_prefix):],
+                    "full-revisionid": None,
+                    "dirty": False, "error": None, "date": None}
+        rootdirs.append(root)
+        root = os.path.dirname(root)  # up a level
+
+    if verbose:
+        print("Tried directories %%s but none started with prefix %%s" %%
+              (str(rootdirs), parentdir_prefix))
+    raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
+
+
+@register_vcs_handler("git", "get_keywords")
+def git_get_keywords(versionfile_abs):
+    """Extract version information from the given file."""
+    # the code embedded in _version.py can just fetch the value of these
+    # keywords. When used from setup.py, we don't want to import _version.py,
+    # so we do it with a regexp instead. This function is not used from
+    # _version.py.
+    keywords = {}
+    try:
+        with open(versionfile_abs, "r") as fobj:
+            for line in fobj:
+                if line.strip().startswith("git_refnames ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["refnames"] = mo.group(1)
+                if line.strip().startswith("git_full ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["full"] = mo.group(1)
+                if line.strip().startswith("git_date ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["date"] = mo.group(1)
+    except OSError:
+        pass
+    return keywords
+
+
+@register_vcs_handler("git", "keywords")
+def git_versions_from_keywords(keywords, tag_prefix, verbose):
+    """Get version information from git keywords."""
+    if "refnames" not in keywords:
+        raise NotThisMethod("Short version file found")
+    date = keywords.get("date")
+    if date is not None:
+        # Use only the last line.  Previous lines may contain GPG signature
+        # information.
+        date = date.splitlines()[-1]
+
+        # git-2.2.0 added "%%cI", which expands to an ISO-8601 -compliant
+        # datestamp. However we prefer "%%ci" (which expands to an "ISO-8601
+        # -like" string, which we must then edit to make compliant), because
+        # it's been around since git-1.5.3, and it's too difficult to
+        # discover which version we're using, or to work around using an
+        # older one.
+        date = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+    refnames = keywords["refnames"].strip()
+    if refnames.startswith("$Format"):
+        if verbose:
+            print("keywords are unexpanded, not using")
+        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
+    refs = {r.strip() for r in refnames.strip("()").split(",")}
+    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
+    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
+    TAG = "tag: "
+    tags = {r[len(TAG):] for r in refs if r.startswith(TAG)}
+    if not tags:
+        # Either we're using git < 1.8.3, or there really are no tags. We use
+        # a heuristic: assume all version tags have a digit. The old git %%d
+        # expansion behaves like git log --decorate=short and strips out the
+        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
+        # between branches and tags. By ignoring refnames without digits, we
+        # filter out many common branch names like "release" and
+        # "stabilization", as well as "HEAD" and "master".
+        tags = {r for r in refs if re.search(r'\d', r)}
+        if verbose:
+            print("discarding '%%s', no digits" %% ",".join(refs - tags))
+    if verbose:
+        print("likely tags: %%s" %% ",".join(sorted(tags)))
+    for ref in sorted(tags):
+        # sorting will prefer e.g. "2.0" over "2.0rc1"
+        if ref.startswith(tag_prefix):
+            r = ref[len(tag_prefix):]
+            # Filter out refs that exactly match prefix or that don't start
+            # with a number once the prefix is stripped (mostly a concern
+            # when prefix is '')
+            if not re.match(r'\d', r):
+                continue
+            if verbose:
+                print("picking %%s" %% r)
+            return {"version": r,
+                    "full-revisionid": keywords["full"].strip(),
+                    "dirty": False, "error": None,
+                    "date": date}
+    # no suitable tags, so version is "0+unknown", but full hex is still there
+    if verbose:
+        print("no suitable tags, using unknown + full revision id")
+    return {"version": "0+unknown",
+            "full-revisionid": keywords["full"].strip(),
+            "dirty": False, "error": "no suitable tags", "date": None}
+
+
+@register_vcs_handler("git", "pieces_from_vcs")
+def git_pieces_from_vcs(tag_prefix, root, verbose, runner=run_command):
+    """Get version from 'git describe' in the root of the source tree.
+
+    This only gets called if the git-archive 'subst' keywords were *not*
+    expanded, and _version.py hasn't already been rewritten with a short
+    version string, meaning we're inside a checked out source tree.
+    """
+    GITS = ["git"]
+    TAG_PREFIX_REGEX = "*"
+    if sys.platform == "win32":
+        GITS = ["git.cmd", "git.exe"]
+        TAG_PREFIX_REGEX = r"\*"
+
+    _, rc = runner(GITS, ["rev-parse", "--git-dir"], cwd=root,
+                   hide_stderr=True)
+    if rc != 0:
+        if verbose:
+            print("Directory %%s not under git control" %% root)
+        raise NotThisMethod("'git rev-parse --git-dir' returned error")
+
+    # if there is a tag matching tag_prefix, this yields TAG-NUM-gHEX[-dirty]
+    # if there isn't one, this yields HEX[-dirty] (no NUM)
+    describe_out, rc = runner(GITS, ["describe", "--tags", "--dirty",
+                                     "--always", "--long",
+                                     "--match",
+                                     "%%s%%s" %% (tag_prefix, TAG_PREFIX_REGEX)],
+                              cwd=root)
+    # --long was added in git-1.5.5
+    if describe_out is None:
+        raise NotThisMethod("'git describe' failed")
+    describe_out = describe_out.strip()
+    full_out, rc = runner(GITS, ["rev-parse", "HEAD"], cwd=root)
+    if full_out is None:
+        raise NotThisMethod("'git rev-parse' failed")
+    full_out = full_out.strip()
+
+    pieces = {}
+    pieces["long"] = full_out
+    pieces["short"] = full_out[:7]  # maybe improved later
+    pieces["error"] = None
+
+    branch_name, rc = runner(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
+                             cwd=root)
+    # --abbrev-ref was added in git-1.6.3
+    if rc != 0 or branch_name is None:
+        raise NotThisMethod("'git rev-parse --abbrev-ref' returned error")
+    branch_name = branch_name.strip()
+
+    if branch_name == "HEAD":
+        # If we aren't exactly on a branch, pick a branch which represents
+        # the current commit. If all else fails, we are on a branchless
+        # commit.
+        branches, rc = runner(GITS, ["branch", "--contains"], cwd=root)
+        # --contains was added in git-1.5.4
+        if rc != 0 or branches is None:
+            raise NotThisMethod("'git branch --contains' returned error")
+        branches = branches.split("\n")
+
+        # Remove the first line if we're running detached
+        if "(" in branches[0]:
+            branches.pop(0)
+
+        # Strip off the leading "* " from the list of branches.
+        branches = [branch[2:] for branch in branches]
+        if "master" in branches:
+            branch_name = "master"
+        elif not branches:
+            branch_name = None
+        else:
+            # Pick the first branch that is returned. Good or bad.
+            branch_name = branches[0]
+
+    pieces["branch"] = branch_name
+
+    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
+    # TAG might have hyphens.
+    git_describe = describe_out
+
+    # look for -dirty suffix
+    dirty = git_describe.endswith("-dirty")
+    pieces["dirty"] = dirty
+    if dirty:
+        git_describe = git_describe[:git_describe.rindex("-dirty")]
+
+    # now we have TAG-NUM-gHEX or HEX
+
+    if "-" in git_describe:
+        # TAG-NUM-gHEX
+        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
+        if not mo:
+            # unparsable. Maybe git-describe is misbehaving?
+            pieces["error"] = ("unable to parse git-describe output: '%%s'"
+                               %% describe_out)
+            return pieces
+
+        # tag
+        full_tag = mo.group(1)
+        if not full_tag.startswith(tag_prefix):
+            if verbose:
+                fmt = "tag '%%s' doesn't start with prefix '%%s'"
+                print(fmt %% (full_tag, tag_prefix))
+            pieces["error"] = ("tag '%%s' doesn't start with prefix '%%s'"
+                               %% (full_tag, tag_prefix))
+            return pieces
+        pieces["closest-tag"] = full_tag[len(tag_prefix):]
+
+        # distance: number of commits since tag
+        pieces["distance"] = int(mo.group(2))
+
+        # commit: short hex revision ID
+        pieces["short"] = mo.group(3)
+
+    else:
+        # HEX: no tags
+        pieces["closest-tag"] = None
+        count_out, rc = runner(GITS, ["rev-list", "HEAD", "--count"], cwd=root)
+        pieces["distance"] = int(count_out)  # total number of commits
+
+    # commit date: see ISO-8601 comment in git_versions_from_keywords()
+    date = runner(GITS, ["show", "-s", "--format=%%ci", "HEAD"], cwd=root)[0].strip()
+    # Use only the last line.  Previous lines may contain GPG signature
+    # information.
+    date = date.splitlines()[-1]
+    pieces["date"] = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+
+    return pieces
+
+
+def plus_or_dot(pieces):
+    """Return a + if we don't already have one, else return a ."""
+    if "+" in pieces.get("closest-tag", ""):
+        return "."
+    return "+"
+
+
+def render_pep440(pieces):
+    """Build up version string, with post-release "local version identifier".
+
+    Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
+    get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
+
+    Exceptions:
+    1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += plus_or_dot(pieces)
+            rendered += "%%d.g%%s" %% (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0+untagged.%%d.g%%s" %% (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_branch(pieces):
+    """TAG[[.dev0]+DISTANCE.gHEX[.dirty]] .
+
+    The ".dev0" means not master branch. Note that .dev0 sorts backwards
+    (a feature branch will appear "older" than the master branch).
+
+    Exceptions:
+    1: no tags. 0[.dev0]+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "%%d.g%%s" %% (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0"
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+untagged.%%d.g%%s" %% (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def pep440_split_post(ver):
+    """Split pep440 version string at the post-release segment.
+
+    Returns the release segments before the post-release and the
+    post-release version number (or -1 if no post-release segment is present).
+    """
+    vc = str.split(ver, ".post")
+    return vc[0], int(vc[1] or 0) if len(vc) == 2 else None
+
+
+def render_pep440_pre(pieces):
+    """TAG[.postN.devDISTANCE] -- No -dirty.
+
+    Exceptions:
+    1: no tags. 0.post0.devDISTANCE
+    """
+    if pieces["closest-tag"]:
+        if pieces["distance"]:
+            # update the post release segment
+            tag_version, post_version = pep440_split_post(pieces["closest-tag"])
+            rendered = tag_version
+            if post_version is not None:
+                rendered += ".post%%d.dev%%d" %% (post_version+1, pieces["distance"])
+            else:
+                rendered += ".post0.dev%%d" %% (pieces["distance"])
+        else:
+            # no commits, use the tag as the version
+            rendered = pieces["closest-tag"]
+    else:
+        # exception #1
+        rendered = "0.post0.dev%%d" %% pieces["distance"]
+    return rendered
+
+
+def render_pep440_post(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX] .
+
+    The ".dev0" means dirty. Note that .dev0 sorts backwards
+    (a dirty tree will appear "older" than the corresponding clean one),
+    but you shouldn't be releasing software with -dirty anyways.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%%d" %% pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%%s" %% pieces["short"]
+    else:
+        # exception #1
+        rendered = "0.post%%d" %% pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+        rendered += "+g%%s" %% pieces["short"]
+    return rendered
+
+
+def render_pep440_post_branch(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX[.dirty]] .
+
+    The ".dev0" means not master branch.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]+gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%%d" %% pieces["distance"]
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%%s" %% pieces["short"]
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0.post%%d" %% pieces["distance"]
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+g%%s" %% pieces["short"]
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_old(pieces):
+    """TAG[.postDISTANCE[.dev0]] .
+
+    The ".dev0" means dirty.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%%d" %% pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+    else:
+        # exception #1
+        rendered = "0.post%%d" %% pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+    return rendered
+
+
+def render_git_describe(pieces):
+    """TAG[-DISTANCE-gHEX][-dirty].
+
+    Like 'git describe --tags --dirty --always'.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"]:
+            rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render_git_describe_long(pieces):
+    """TAG-DISTANCE-gHEX[-dirty].
+
+    Like 'git describe --tags --dirty --always -long'.
+    The distance/hash is unconditional.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render(pieces, style):
+    """Render the given version pieces into the requested style."""
+    if pieces["error"]:
+        return {"version": "unknown",
+                "full-revisionid": pieces.get("long"),
+                "dirty": None,
+                "error": pieces["error"],
+                "date": None}
+
+    if not style or style == "default":
+        style = "pep440"  # the default
+
+    if style == "pep440":
+        rendered = render_pep440(pieces)
+    elif style == "pep440-branch":
+        rendered = render_pep440_branch(pieces)
+    elif style == "pep440-pre":
+        rendered = render_pep440_pre(pieces)
+    elif style == "pep440-post":
+        rendered = render_pep440_post(pieces)
+    elif style == "pep440-post-branch":
+        rendered = render_pep440_post_branch(pieces)
+    elif style == "pep440-old":
+        rendered = render_pep440_old(pieces)
+    elif style == "git-describe":
+        rendered = render_git_describe(pieces)
+    elif style == "git-describe-long":
+        rendered = render_git_describe_long(pieces)
+    else:
+        raise ValueError("unknown style '%%s'" %% style)
+
+    return {"version": rendered, "full-revisionid": pieces["long"],
+            "dirty": pieces["dirty"], "error": None,
+            "date": pieces.get("date")}
+
+
+def get_versions():
+    """Get version information or return default if unable to do so."""
+    # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
+    # __file__, we can work backwards from there to the root. Some
+    # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
+    # case we can only use expanded keywords.
+
+    cfg = get_config()
+    verbose = cfg.verbose
+
+    try:
+        return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
+                                          verbose)
+    except NotThisMethod:
+        pass
+
+    try:
+        root = os.path.realpath(__file__)
+        # versionfile_source is the relative path from the top of the source
+        # tree (where the .git directory might live) to this file. Invert
+        # this to find the root from __file__.
+        for _ in cfg.versionfile_source.split('/'):
+            root = os.path.dirname(root)
+    except NameError:
+        return {"version": "0+unknown", "full-revisionid": None,
+                "dirty": None,
+                "error": "unable to find root of source tree",
+                "date": None}
+
+    try:
+        pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
+        return render(pieces, cfg.style)
+    except NotThisMethod:
+        pass
+
+    try:
+        if cfg.parentdir_prefix:
+            return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
+    except NotThisMethod:
+        pass
+
+    return {"version": "0+unknown", "full-revisionid": None,
+            "dirty": None,
+            "error": "unable to compute version", "date": None}
+'''
+
+
+@register_vcs_handler("git", "get_keywords")
+def git_get_keywords(versionfile_abs):
+    """Extract version information from the given file."""
+    # the code embedded in _version.py can just fetch the value of these
+    # keywords. When used from setup.py, we don't want to import _version.py,
+    # so we do it with a regexp instead. This function is not used from
+    # _version.py.
+    keywords = {}
+    try:
+        with open(versionfile_abs, "r") as fobj:
+            for line in fobj:
+                if line.strip().startswith("git_refnames ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["refnames"] = mo.group(1)
+                if line.strip().startswith("git_full ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["full"] = mo.group(1)
+                if line.strip().startswith("git_date ="):
+                    mo = re.search(r'=\s*"(.*)"', line)
+                    if mo:
+                        keywords["date"] = mo.group(1)
+    except OSError:
+        pass
+    return keywords
+
+
+@register_vcs_handler("git", "keywords")
+def git_versions_from_keywords(keywords, tag_prefix, verbose):
+    """Get version information from git keywords."""
+    if "refnames" not in keywords:
+        raise NotThisMethod("Short version file found")
+    date = keywords.get("date")
+    if date is not None:
+        # Use only the last line.  Previous lines may contain GPG signature
+        # information.
+        date = date.splitlines()[-1]
+
+        # git-2.2.0 added "%cI", which expands to an ISO-8601 -compliant
+        # datestamp. However we prefer "%ci" (which expands to an "ISO-8601
+        # -like" string, which we must then edit to make compliant), because
+        # it's been around since git-1.5.3, and it's too difficult to
+        # discover which version we're using, or to work around using an
+        # older one.
+        date = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+    refnames = keywords["refnames"].strip()
+    if refnames.startswith("$Format"):
+        if verbose:
+            print("keywords are unexpanded, not using")
+        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
+    refs = {r.strip() for r in refnames.strip("()").split(",")}
+    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
+    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
+    TAG = "tag: "
+    tags = {r[len(TAG):] for r in refs if r.startswith(TAG)}
+    if not tags:
+        # Either we're using git < 1.8.3, or there really are no tags. We use
+        # a heuristic: assume all version tags have a digit. The old git %d
+        # expansion behaves like git log --decorate=short and strips out the
+        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
+        # between branches and tags. By ignoring refnames without digits, we
+        # filter out many common branch names like "release" and
+        # "stabilization", as well as "HEAD" and "master".
+        tags = {r for r in refs if re.search(r'\d', r)}
+        if verbose:
+            print("discarding '%s', no digits" % ",".join(refs - tags))
+    if verbose:
+        print("likely tags: %s" % ",".join(sorted(tags)))
+    for ref in sorted(tags):
+        # sorting will prefer e.g. "2.0" over "2.0rc1"
+        if ref.startswith(tag_prefix):
+            r = ref[len(tag_prefix):]
+            # Filter out refs that exactly match prefix or that don't start
+            # with a number once the prefix is stripped (mostly a concern
+            # when prefix is '')
+            if not re.match(r'\d', r):
+                continue
+            if verbose:
+                print("picking %s" % r)
+            return {"version": r,
+                    "full-revisionid": keywords["full"].strip(),
+                    "dirty": False, "error": None,
+                    "date": date}
+    # no suitable tags, so version is "0+unknown", but full hex is still there
+    if verbose:
+        print("no suitable tags, using unknown + full revision id")
+    return {"version": "0+unknown",
+            "full-revisionid": keywords["full"].strip(),
+            "dirty": False, "error": "no suitable tags", "date": None}
+
+
+@register_vcs_handler("git", "pieces_from_vcs")
+def git_pieces_from_vcs(tag_prefix, root, verbose, runner=run_command):
+    """Get version from 'git describe' in the root of the source tree.
+
+    This only gets called if the git-archive 'subst' keywords were *not*
+    expanded, and _version.py hasn't already been rewritten with a short
+    version string, meaning we're inside a checked out source tree.
+    """
+    GITS = ["git"]
+    TAG_PREFIX_REGEX = "*"
+    if sys.platform == "win32":
+        GITS = ["git.cmd", "git.exe"]
+        TAG_PREFIX_REGEX = r"\*"
+
+    _, rc = runner(GITS, ["rev-parse", "--git-dir"], cwd=root,
+                   hide_stderr=True)
+    if rc != 0:
+        if verbose:
+            print("Directory %s not under git control" % root)
+        raise NotThisMethod("'git rev-parse --git-dir' returned error")
+
+    # if there is a tag matching tag_prefix, this yields TAG-NUM-gHEX[-dirty]
+    # if there isn't one, this yields HEX[-dirty] (no NUM)
+    describe_out, rc = runner(GITS, ["describe", "--tags", "--dirty",
+                                     "--always", "--long",
+                                     "--match",
+                                     "%s%s" % (tag_prefix, TAG_PREFIX_REGEX)],
+                              cwd=root)
+    # --long was added in git-1.5.5
+    if describe_out is None:
+        raise NotThisMethod("'git describe' failed")
+    describe_out = describe_out.strip()
+    full_out, rc = runner(GITS, ["rev-parse", "HEAD"], cwd=root)
+    if full_out is None:
+        raise NotThisMethod("'git rev-parse' failed")
+    full_out = full_out.strip()
+
+    pieces = {}
+    pieces["long"] = full_out
+    pieces["short"] = full_out[:7]  # maybe improved later
+    pieces["error"] = None
+
+    branch_name, rc = runner(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
+                             cwd=root)
+    # --abbrev-ref was added in git-1.6.3
+    if rc != 0 or branch_name is None:
+        raise NotThisMethod("'git rev-parse --abbrev-ref' returned error")
+    branch_name = branch_name.strip()
+
+    if branch_name == "HEAD":
+        # If we aren't exactly on a branch, pick a branch which represents
+        # the current commit. If all else fails, we are on a branchless
+        # commit.
+        branches, rc = runner(GITS, ["branch", "--contains"], cwd=root)
+        # --contains was added in git-1.5.4
+        if rc != 0 or branches is None:
+            raise NotThisMethod("'git branch --contains' returned error")
+        branches = branches.split("\n")
+
+        # Remove the first line if we're running detached
+        if "(" in branches[0]:
+            branches.pop(0)
+
+        # Strip off the leading "* " from the list of branches.
+        branches = [branch[2:] for branch in branches]
+        if "master" in branches:
+            branch_name = "master"
+        elif not branches:
+            branch_name = None
+        else:
+            # Pick the first branch that is returned. Good or bad.
+            branch_name = branches[0]
+
+    pieces["branch"] = branch_name
+
+    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
+    # TAG might have hyphens.
+    git_describe = describe_out
+
+    # look for -dirty suffix
+    dirty = git_describe.endswith("-dirty")
+    pieces["dirty"] = dirty
+    if dirty:
+        git_describe = git_describe[:git_describe.rindex("-dirty")]
+
+    # now we have TAG-NUM-gHEX or HEX
+
+    if "-" in git_describe:
+        # TAG-NUM-gHEX
+        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
+        if not mo:
+            # unparsable. Maybe git-describe is misbehaving?
+            pieces["error"] = ("unable to parse git-describe output: '%s'"
+                               % describe_out)
+            return pieces
+
+        # tag
+        full_tag = mo.group(1)
+        if not full_tag.startswith(tag_prefix):
+            if verbose:
+                fmt = "tag '%s' doesn't start with prefix '%s'"
+                print(fmt % (full_tag, tag_prefix))
+            pieces["error"] = ("tag '%s' doesn't start with prefix '%s'"
+                               % (full_tag, tag_prefix))
+            return pieces
+        pieces["closest-tag"] = full_tag[len(tag_prefix):]
+
+        # distance: number of commits since tag
+        pieces["distance"] = int(mo.group(2))
+
+        # commit: short hex revision ID
+        pieces["short"] = mo.group(3)
+
+    else:
+        # HEX: no tags
+        pieces["closest-tag"] = None
+        count_out, rc = runner(GITS, ["rev-list", "HEAD", "--count"], cwd=root)
+        pieces["distance"] = int(count_out)  # total number of commits
+
+    # commit date: see ISO-8601 comment in git_versions_from_keywords()
+    date = runner(GITS, ["show", "-s", "--format=%ci", "HEAD"], cwd=root)[0].strip()
+    # Use only the last line.  Previous lines may contain GPG signature
+    # information.
+    date = date.splitlines()[-1]
+    pieces["date"] = date.strip().replace(" ", "T", 1).replace(" ", "", 1)
+
+    return pieces
+
+
+def do_vcs_install(manifest_in, versionfile_source, ipy):
+    """Git-specific installation logic for Versioneer.
+
+    For Git, this means creating/changing .gitattributes to mark _version.py
+    for export-subst keyword substitution.
+    """
+    GITS = ["git"]
+    if sys.platform == "win32":
+        GITS = ["git.cmd", "git.exe"]
+    files = [manifest_in, versionfile_source]
+    if ipy:
+        files.append(ipy)
+    try:
+        my_path = __file__
+        if my_path.endswith(".pyc") or my_path.endswith(".pyo"):
+            my_path = os.path.splitext(my_path)[0] + ".py"
+        versioneer_file = os.path.relpath(my_path)
+    except NameError:
+        versioneer_file = "versioneer.py"
+    files.append(versioneer_file)
+    present = False
+    try:
+        with open(".gitattributes", "r") as fobj:
+            for line in fobj:
+                if line.strip().startswith(versionfile_source):
+                    if "export-subst" in line.strip().split()[1:]:
+                        present = True
+                        break
+    except OSError:
+        pass
+    if not present:
+        with open(".gitattributes", "a+") as fobj:
+            fobj.write(f"{versionfile_source} export-subst\n")
+        files.append(".gitattributes")
+    run_command(GITS, ["add", "--"] + files)
+
+
+def versions_from_parentdir(parentdir_prefix, root, verbose):
+    """Try to determine the version from the parent directory name.
+
+    Source tarballs conventionally unpack into a directory that includes both
+    the project name and a version string. We will also support searching up
+    two directory levels for an appropriately named parent directory
+    """
+    rootdirs = []
+
+    for _ in range(3):
+        dirname = os.path.basename(root)
+        if dirname.startswith(parentdir_prefix):
+            return {"version": dirname[len(parentdir_prefix):],
+                    "full-revisionid": None,
+                    "dirty": False, "error": None, "date": None}
+        rootdirs.append(root)
+        root = os.path.dirname(root)  # up a level
+
+    if verbose:
+        print("Tried directories %s but none started with prefix %s" %
+              (str(rootdirs), parentdir_prefix))
+    raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
+
+
+SHORT_VERSION_PY = """
+# This file was generated by 'versioneer.py' (0.21) from
+# revision-control system data, or from the parent directory name of an
+# unpacked source archive. Distribution tarballs contain a pre-generated copy
+# of this file.
+
+import json
+
+version_json = '''
+%s
+'''  # END VERSION_JSON
+
+
+def get_versions():
+    return json.loads(version_json)
+"""
+
+
+def versions_from_file(filename):
+    """Try to determine the version from _version.py if present."""
+    try:
+        with open(filename) as f:
+            contents = f.read()
+    except OSError:
+        raise NotThisMethod("unable to read _version.py")
+    mo = re.search(r"version_json = '''\n(.*)'''  # END VERSION_JSON",
+                   contents, re.M | re.S)
+    if not mo:
+        mo = re.search(r"version_json = '''\r\n(.*)'''  # END VERSION_JSON",
+                       contents, re.M | re.S)
+    if not mo:
+        raise NotThisMethod("no version_json in _version.py")
+    return json.loads(mo.group(1))
+
+
+def write_to_version_file(filename, versions):
+    """Write the given version number to the given _version.py file."""
+    os.unlink(filename)
+    contents = json.dumps(versions, sort_keys=True,
+                          indent=1, separators=(",", ": "))
+    with open(filename, "w") as f:
+        f.write(SHORT_VERSION_PY % contents)
+
+    print("set %s to '%s'" % (filename, versions["version"]))
+
+
+def plus_or_dot(pieces):
+    """Return a + if we don't already have one, else return a ."""
+    if "+" in pieces.get("closest-tag", ""):
+        return "."
+    return "+"
+
+
+def render_pep440(pieces):
+    """Build up version string, with post-release "local version identifier".
+
+    Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
+    get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
+
+    Exceptions:
+    1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += plus_or_dot(pieces)
+            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0+untagged.%d.g%s" % (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_branch(pieces):
+    """TAG[[.dev0]+DISTANCE.gHEX[.dirty]] .
+
+    The ".dev0" means not master branch. Note that .dev0 sorts backwards
+    (a feature branch will appear "older" than the master branch).
+
+    Exceptions:
+    1: no tags. 0[.dev0]+untagged.DISTANCE.gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0"
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+untagged.%d.g%s" % (pieces["distance"],
+                                          pieces["short"])
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def pep440_split_post(ver):
+    """Split pep440 version string at the post-release segment.
+
+    Returns the release segments before the post-release and the
+    post-release version number (or -1 if no post-release segment is present).
+    """
+    vc = str.split(ver, ".post")
+    return vc[0], int(vc[1] or 0) if len(vc) == 2 else None
+
+
+def render_pep440_pre(pieces):
+    """TAG[.postN.devDISTANCE] -- No -dirty.
+
+    Exceptions:
+    1: no tags. 0.post0.devDISTANCE
+    """
+    if pieces["closest-tag"]:
+        if pieces["distance"]:
+            # update the post release segment
+            tag_version, post_version = pep440_split_post(pieces["closest-tag"])
+            rendered = tag_version
+            if post_version is not None:
+                rendered += ".post%d.dev%d" % (post_version+1, pieces["distance"])
+            else:
+                rendered += ".post0.dev%d" % (pieces["distance"])
+        else:
+            # no commits, use the tag as the version
+            rendered = pieces["closest-tag"]
+    else:
+        # exception #1
+        rendered = "0.post0.dev%d" % pieces["distance"]
+    return rendered
+
+
+def render_pep440_post(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX] .
+
+    The ".dev0" means dirty. Note that .dev0 sorts backwards
+    (a dirty tree will appear "older" than the corresponding clean one),
+    but you shouldn't be releasing software with -dirty anyways.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%s" % pieces["short"]
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+        rendered += "+g%s" % pieces["short"]
+    return rendered
+
+
+def render_pep440_post_branch(pieces):
+    """TAG[.postDISTANCE[.dev0]+gHEX[.dirty]] .
+
+    The ".dev0" means not master branch.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]+gHEX[.dirty]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["branch"] != "master":
+                rendered += ".dev0"
+            rendered += plus_or_dot(pieces)
+            rendered += "g%s" % pieces["short"]
+            if pieces["dirty"]:
+                rendered += ".dirty"
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["branch"] != "master":
+            rendered += ".dev0"
+        rendered += "+g%s" % pieces["short"]
+        if pieces["dirty"]:
+            rendered += ".dirty"
+    return rendered
+
+
+def render_pep440_old(pieces):
+    """TAG[.postDISTANCE[.dev0]] .
+
+    The ".dev0" means dirty.
+
+    Exceptions:
+    1: no tags. 0.postDISTANCE[.dev0]
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"] or pieces["dirty"]:
+            rendered += ".post%d" % pieces["distance"]
+            if pieces["dirty"]:
+                rendered += ".dev0"
+    else:
+        # exception #1
+        rendered = "0.post%d" % pieces["distance"]
+        if pieces["dirty"]:
+            rendered += ".dev0"
+    return rendered
+
+
+def render_git_describe(pieces):
+    """TAG[-DISTANCE-gHEX][-dirty].
+
+    Like 'git describe --tags --dirty --always'.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        if pieces["distance"]:
+            rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render_git_describe_long(pieces):
+    """TAG-DISTANCE-gHEX[-dirty].
+
+    Like 'git describe --tags --dirty --always -long'.
+    The distance/hash is unconditional.
+
+    Exceptions:
+    1: no tags. HEX[-dirty]  (note: no 'g' prefix)
+    """
+    if pieces["closest-tag"]:
+        rendered = pieces["closest-tag"]
+        rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
+    else:
+        # exception #1
+        rendered = pieces["short"]
+    if pieces["dirty"]:
+        rendered += "-dirty"
+    return rendered
+
+
+def render(pieces, style):
+    """Render the given version pieces into the requested style."""
+    if pieces["error"]:
+        return {"version": "unknown",
+                "full-revisionid": pieces.get("long"),
+                "dirty": None,
+                "error": pieces["error"],
+                "date": None}
+
+    if not style or style == "default":
+        style = "pep440"  # the default
+
+    if style == "pep440":
+        rendered = render_pep440(pieces)
+    elif style == "pep440-branch":
+        rendered = render_pep440_branch(pieces)
+    elif style == "pep440-pre":
+        rendered = render_pep440_pre(pieces)
+    elif style == "pep440-post":
+        rendered = render_pep440_post(pieces)
+    elif style == "pep440-post-branch":
+        rendered = render_pep440_post_branch(pieces)
+    elif style == "pep440-old":
+        rendered = render_pep440_old(pieces)
+    elif style == "git-describe":
+        rendered = render_git_describe(pieces)
+    elif style == "git-describe-long":
+        rendered = render_git_describe_long(pieces)
+    else:
+        raise ValueError("unknown style '%s'" % style)
+
+    return {"version": rendered, "full-revisionid": pieces["long"],
+            "dirty": pieces["dirty"], "error": None,
+            "date": pieces.get("date")}
+
+
+class VersioneerBadRootError(Exception):
+    """The project root directory is unknown or missing key files."""
+
+
+def get_versions(verbose=False):
+    """Get the project version from whatever source is available.
+
+    Returns dict with two keys: 'version' and 'full'.
+    """
+    if "versioneer" in sys.modules:
+        # see the discussion in cmdclass.py:get_cmdclass()
+        del sys.modules["versioneer"]
+
+    root = get_root()
+    cfg = get_config_from_root(root)
+
+    assert cfg.VCS is not None, "please set [versioneer]VCS= in setup.cfg"
+    handlers = HANDLERS.get(cfg.VCS)
+    assert handlers, "unrecognized VCS '%s'" % cfg.VCS
+    verbose = verbose or cfg.verbose
+    assert cfg.versionfile_source is not None, \
+        "please set versioneer.versionfile_source"
+    assert cfg.tag_prefix is not None, "please set versioneer.tag_prefix"
+
+    versionfile_abs = os.path.join(root, cfg.versionfile_source)
+
+    # extract version from first of: _version.py, VCS command (e.g. 'git
+    # describe'), parentdir. This is meant to work for developers using a
+    # source checkout, for users of a tarball created by 'setup.py sdist',
+    # and for users of a tarball/zipball created by 'git archive' or github's
+    # download-from-tag feature or the equivalent in other VCSes.
+
+    get_keywords_f = handlers.get("get_keywords")
+    from_keywords_f = handlers.get("keywords")
+    if get_keywords_f and from_keywords_f:
+        try:
+            keywords = get_keywords_f(versionfile_abs)
+            ver = from_keywords_f(keywords, cfg.tag_prefix, verbose)
+            if verbose:
+                print("got version from expanded keyword %s" % ver)
+            return ver
+        except NotThisMethod:
+            pass
+
+    try:
+        ver = versions_from_file(versionfile_abs)
+        if verbose:
+            print("got version from file %s %s" % (versionfile_abs, ver))
+        return ver
+    except NotThisMethod:
+        pass
+
+    from_vcs_f = handlers.get("pieces_from_vcs")
+    if from_vcs_f:
+        try:
+            pieces = from_vcs_f(cfg.tag_prefix, root, verbose)
+            ver = render(pieces, cfg.style)
+            if verbose:
+                print("got version from VCS %s" % ver)
+            return ver
+        except NotThisMethod:
+            pass
+
+    try:
+        if cfg.parentdir_prefix:
+            ver = versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
+            if verbose:
+                print("got version from parentdir %s" % ver)
+            return ver
+    except NotThisMethod:
+        pass
+
+    if verbose:
+        print("unable to compute version")
+
+    return {"version": "0+unknown", "full-revisionid": None,
+            "dirty": None, "error": "unable to compute version",
+            "date": None}
+
+
+def get_version():
+    """Get the short version string for this project."""
+    return get_versions()["version"]
+
+
+def get_cmdclass(cmdclass=None):
+    """Get the custom setuptools/distutils subclasses used by Versioneer.
+
+    If the package uses a different cmdclass (e.g. one from numpy), it
+    should be provide as an argument.
+    """
+    if "versioneer" in sys.modules:
+        del sys.modules["versioneer"]
+        # this fixes the "python setup.py develop" case (also 'install' and
+        # 'easy_install .'), in which subdependencies of the main project are
+        # built (using setup.py bdist_egg) in the same python process. Assume
+        # a main project A and a dependency B, which use different versions
+        # of Versioneer. A's setup.py imports A's Versioneer, leaving it in
+        # sys.modules by the time B's setup.py is executed, causing B to run
+        # with the wrong versioneer. Setuptools wraps the sub-dep builds in a
+        # sandbox that restores sys.modules to it's pre-build state, so the
+        # parent is protected against the child's "import versioneer". By
+        # removing ourselves from sys.modules here, before the child build
+        # happens, we protect the child from the parent's versioneer too.
+        # Also see https://github.com/python-versioneer/python-versioneer/issues/52
+
+    cmds = {} if cmdclass is None else cmdclass.copy()
+
+    # we add "version" to both distutils and setuptools
+    try:
+        from setuptools import Command
+    except ImportError:
+        from distutils.core import Command
+
+    class cmd_version(Command):
+        description = "report generated version string"
+        user_options = []
+        boolean_options = []
+
+        def initialize_options(self):
+            pass
+
+        def finalize_options(self):
+            pass
+
+        def run(self):
+            vers = get_versions(verbose=True)
+            print("Version: %s" % vers["version"])
+            print(" full-revisionid: %s" % vers.get("full-revisionid"))
+            print(" dirty: %s" % vers.get("dirty"))
+            print(" date: %s" % vers.get("date"))
+            if vers["error"]:
+                print(" error: %s" % vers["error"])
+    cmds["version"] = cmd_version
+
+    # we override "build_py" in both distutils and setuptools
+    #
+    # most invocation pathways end up running build_py:
+    #  distutils/build -> build_py
+    #  distutils/install -> distutils/build ->..
+    #  setuptools/bdist_wheel -> distutils/install ->..
+    #  setuptools/bdist_egg -> distutils/install_lib -> build_py
+    #  setuptools/install -> bdist_egg ->..
+    #  setuptools/develop -> ?
+    #  pip install:
+    #   copies source tree to a tempdir before running egg_info/etc
+    #   if .git isn't copied too, 'git describe' will fail
+    #   then does setup.py bdist_wheel, or sometimes setup.py install
+    #  setup.py egg_info -> ?
+
+    # we override different "build_py" commands for both environments
+    if 'build_py' in cmds:
+        _build_py = cmds['build_py']
+    elif "setuptools" in sys.modules:
+        from setuptools.command.build_py import build_py as _build_py
+    else:
+        from distutils.command.build_py import build_py as _build_py
+
+    class cmd_build_py(_build_py):
+        def run(self):
+            root = get_root()
+            cfg = get_config_from_root(root)
+            versions = get_versions()
+            _build_py.run(self)
+            # now locate _version.py in the new build/ directory and replace
+            # it with an updated value
+            if cfg.versionfile_build:
+                target_versionfile = os.path.join(self.build_lib,
+                                                  cfg.versionfile_build)
+                print("UPDATING %s" % target_versionfile)
+                write_to_version_file(target_versionfile, versions)
+    cmds["build_py"] = cmd_build_py
+
+    if 'build_ext' in cmds:
+        _build_ext = cmds['build_ext']
+    elif "setuptools" in sys.modules:
+        from setuptools.command.build_ext import build_ext as _build_ext
+    else:
+        from distutils.command.build_ext import build_ext as _build_ext
+
+    class cmd_build_ext(_build_ext):
+        def run(self):
+            root = get_root()
+            cfg = get_config_from_root(root)
+            versions = get_versions()
+            _build_ext.run(self)
+            if self.inplace:
+                # build_ext --inplace will only build extensions in
+                # build/lib<..> dir with no _version.py to write to.
+                # As in place builds will already have a _version.py
+                # in the module dir, we do not need to write one.
+                return
+            # now locate _version.py in the new build/ directory and replace
+            # it with an updated value
+            target_versionfile = os.path.join(self.build_lib,
+                                              cfg.versionfile_build)
+            print("UPDATING %s" % target_versionfile)
+            write_to_version_file(target_versionfile, versions)
+    cmds["build_ext"] = cmd_build_ext
+
+    if "cx_Freeze" in sys.modules:  # cx_freeze enabled?
+        from cx_Freeze.dist import build_exe as _build_exe
+        # nczeczulin reports that py2exe won't like the pep440-style string
+        # as FILEVERSION, but it can be used for PRODUCTVERSION, e.g.
+        # setup(console=[{
+        #   "version": versioneer.get_version().split("+", 1)[0], # FILEVERSION
+        #   "product_version": versioneer.get_version(),
+        #   ...
+
+        class cmd_build_exe(_build_exe):
+            def run(self):
+                root = get_root()
+                cfg = get_config_from_root(root)
+                versions = get_versions()
+                target_versionfile = cfg.versionfile_source
+                print("UPDATING %s" % target_versionfile)
+                write_to_version_file(target_versionfile, versions)
+
+                _build_exe.run(self)
+                os.unlink(target_versionfile)
+                with open(cfg.versionfile_source, "w") as f:
+                    LONG = LONG_VERSION_PY[cfg.VCS]
+                    f.write(LONG %
+                            {"DOLLAR": "$",
+                             "STYLE": cfg.style,
+                             "TAG_PREFIX": cfg.tag_prefix,
+                             "PARENTDIR_PREFIX": cfg.parentdir_prefix,
+                             "VERSIONFILE_SOURCE": cfg.versionfile_source,
+                             })
+        cmds["build_exe"] = cmd_build_exe
+        del cmds["build_py"]
+
+    if 'py2exe' in sys.modules:  # py2exe enabled?
+        from py2exe.distutils_buildexe import py2exe as _py2exe
+
+        class cmd_py2exe(_py2exe):
+            def run(self):
+                root = get_root()
+                cfg = get_config_from_root(root)
+                versions = get_versions()
+                target_versionfile = cfg.versionfile_source
+                print("UPDATING %s" % target_versionfile)
+                write_to_version_file(target_versionfile, versions)
+
+                _py2exe.run(self)
+                os.unlink(target_versionfile)
+                with open(cfg.versionfile_source, "w") as f:
+                    LONG = LONG_VERSION_PY[cfg.VCS]
+                    f.write(LONG %
+                            {"DOLLAR": "$",
+                             "STYLE": cfg.style,
+                             "TAG_PREFIX": cfg.tag_prefix,
+                             "PARENTDIR_PREFIX": cfg.parentdir_prefix,
+                             "VERSIONFILE_SOURCE": cfg.versionfile_source,
+                             })
+        cmds["py2exe"] = cmd_py2exe
+
+    # we override different "sdist" commands for both environments
+    if 'sdist' in cmds:
+        _sdist = cmds['sdist']
+    elif "setuptools" in sys.modules:
+        from setuptools.command.sdist import sdist as _sdist
+    else:
+        from distutils.command.sdist import sdist as _sdist
+
+    class cmd_sdist(_sdist):
+        def run(self):
+            versions = get_versions()
+            self._versioneer_generated_versions = versions
+            # unless we update this, the command will keep using the old
+            # version
+            self.distribution.metadata.version = versions["version"]
+            return _sdist.run(self)
+
+        def make_release_tree(self, base_dir, files):
+            root = get_root()
+            cfg = get_config_from_root(root)
+            _sdist.make_release_tree(self, base_dir, files)
+            # now locate _version.py in the new base_dir directory
+            # (remembering that it may be a hardlink) and replace it with an
+            # updated value
+            target_versionfile = os.path.join(base_dir, cfg.versionfile_source)
+            print("UPDATING %s" % target_versionfile)
+            write_to_version_file(target_versionfile,
+                                  self._versioneer_generated_versions)
+    cmds["sdist"] = cmd_sdist
+
+    return cmds
+
+
+CONFIG_ERROR = """
+setup.cfg is missing the necessary Versioneer configuration. You need
+a section like:
+
+ [versioneer]
+ VCS = git
+ style = pep440
+ versionfile_source = src/myproject/_version.py
+ versionfile_build = myproject/_version.py
+ tag_prefix =
+ parentdir_prefix = myproject-
+
+You will also need to edit your setup.py to use the results:
+
+ import versioneer
+ setup(version=versioneer.get_version(),
+       cmdclass=versioneer.get_cmdclass(), ...)
+
+Please read the docstring in ./versioneer.py for configuration instructions,
+edit setup.cfg, and re-run the installer or 'python versioneer.py setup'.
+"""
+
+SAMPLE_CONFIG = """
+# See the docstring in versioneer.py for instructions. Note that you must
+# re-run 'versioneer.py setup' after changing this section, and commit the
+# resulting files.
+
+[versioneer]
+#VCS = git
+#style = pep440
+#versionfile_source =
+#versionfile_build =
+#tag_prefix =
+#parentdir_prefix =
+
+"""
+
+OLD_SNIPPET = """
+from ._version import get_versions
+__version__ = get_versions()['version']
+del get_versions
+"""
+
+INIT_PY_SNIPPET = """
+from . import {0}
+__version__ = {0}.get_versions()['version']
+"""
+
+
+def do_setup():
+    """Do main VCS-independent setup function for installing Versioneer."""
+    root = get_root()
+    try:
+        cfg = get_config_from_root(root)
+    except (OSError, configparser.NoSectionError,
+            configparser.NoOptionError) as e:
+        if isinstance(e, (OSError, configparser.NoSectionError)):
+            print("Adding sample versioneer config to setup.cfg",
+                  file=sys.stderr)
+            with open(os.path.join(root, "setup.cfg"), "a") as f:
+                f.write(SAMPLE_CONFIG)
+        print(CONFIG_ERROR, file=sys.stderr)
+        return 1
+
+    print(" creating %s" % cfg.versionfile_source)
+    with open(cfg.versionfile_source, "w") as f:
+        LONG = LONG_VERSION_PY[cfg.VCS]
+        f.write(LONG % {"DOLLAR": "$",
+                        "STYLE": cfg.style,
+                        "TAG_PREFIX": cfg.tag_prefix,
+                        "PARENTDIR_PREFIX": cfg.parentdir_prefix,
+                        "VERSIONFILE_SOURCE": cfg.versionfile_source,
+                        })
+
+    ipy = os.path.join(os.path.dirname(cfg.versionfile_source),
+                       "__init__.py")
+    if os.path.exists(ipy):
+        try:
+            with open(ipy, "r") as f:
+                old = f.read()
+        except OSError:
+            old = ""
+        module = os.path.splitext(os.path.basename(cfg.versionfile_source))[0]
+        snippet = INIT_PY_SNIPPET.format(module)
+        if OLD_SNIPPET in old:
+            print(" replacing boilerplate in %s" % ipy)
+            with open(ipy, "w") as f:
+                f.write(old.replace(OLD_SNIPPET, snippet))
+        elif snippet not in old:
+            print(" appending to %s" % ipy)
+            with open(ipy, "a") as f:
+                f.write(snippet)
+        else:
+            print(" %s unmodified" % ipy)
+    else:
+        print(" %s doesn't exist, ok" % ipy)
+        ipy = None
+
+    # Make sure both the top-level "versioneer.py" and versionfile_source
+    # (PKG/_version.py, used by runtime code) are in MANIFEST.in, so
+    # they'll be copied into source distributions. Pip won't be able to
+    # install the package without this.
+    manifest_in = os.path.join(root, "MANIFEST.in")
+    simple_includes = set()
+    try:
+        with open(manifest_in, "r") as f:
+            for line in f:
+                if line.startswith("include "):
+                    for include in line.split()[1:]:
+                        simple_includes.add(include)
+    except OSError:
+        pass
+    # That doesn't cover everything MANIFEST.in can do
+    # (http://docs.python.org/2/distutils/sourcedist.html#commands), so
+    # it might give some false negatives. Appending redundant 'include'
+    # lines is safe, though.
+    if "versioneer.py" not in simple_includes:
+        print(" appending 'versioneer.py' to MANIFEST.in")
+        with open(manifest_in, "a") as f:
+            f.write("include versioneer.py\n")
+    else:
+        print(" 'versioneer.py' already in MANIFEST.in")
+    if cfg.versionfile_source not in simple_includes:
+        print(" appending versionfile_source ('%s') to MANIFEST.in" %
+              cfg.versionfile_source)
+        with open(manifest_in, "a") as f:
+            f.write("include %s\n" % cfg.versionfile_source)
+    else:
+        print(" versionfile_source already in MANIFEST.in")
+
+    # Make VCS-specific changes. For git, this means creating/changing
+    # .gitattributes to mark _version.py for export-subst keyword
+    # substitution.
+    do_vcs_install(manifest_in, cfg.versionfile_source, ipy)
+    return 0
+
+
+def scan_setup_py():
+    """Validate the contents of setup.py against Versioneer's expectations."""
+    found = set()
+    setters = False
+    errors = 0
+    with open("setup.py", "r") as f:
+        for line in f.readlines():
+            if "import versioneer" in line:
+                found.add("import")
+            if "versioneer.get_cmdclass()" in line:
+                found.add("cmdclass")
+            if "versioneer.get_version()" in line:
+                found.add("get_version")
+            if "versioneer.VCS" in line:
+                setters = True
+            if "versioneer.versionfile_source" in line:
+                setters = True
+    if len(found) != 3:
+        print("")
+        print("Your setup.py appears to be missing some important items")
+        print("(but I might be wrong). Please make sure it has something")
+        print("roughly like the following:")
+        print("")
+        print(" import versioneer")
+        print(" setup( version=versioneer.get_version(),")
+        print("        cmdclass=versioneer.get_cmdclass(),  ...)")
+        print("")
+        errors += 1
+    if setters:
+        print("You should remove lines like 'versioneer.VCS = ' and")
+        print("'versioneer.versionfile_source = ' . This configuration")
+        print("now lives in setup.cfg, and should be removed from setup.py")
+        print("")
+        errors += 1
+    return errors
+
+
+if __name__ == "__main__":
+    cmd = sys.argv[1]
+    if cmd == "setup":
+        errors = do_setup()
+        errors += scan_setup_py()
+        if errors:
+            sys.exit(1)


Test patch:
diff --git a/.github/workflows/test_crippledfs.yml b/.github/workflows/test_crippledfs.yml
new file mode 100644
index 0000000..717b822
--- /dev/null
+++ b/.github/workflows/test_crippledfs.yml
@@ -0,0 +1,55 @@
+name: crippled-filesystems
+
+on: [pull_request]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Set up system
+      shell: bash
+      run: |
+        bash <(wget -q -O- http://neuro.debian.net/_files/neurodebian-travis.sh)
+        # enable repo for devel git-annex, if needed
+        #sudo sed -e 's|\(deb.*data\)|#\1|' -e 's|/debian |/debian-devel |' /etc/apt/sources.list.d/neurodebian.sources.list | sudo tee /etc/apt/sources.list.d/neurodebian-devel.sources.list
+        sudo apt-get update -qq
+        sudo apt-get install eatmydata
+        sudo eatmydata apt-get install git-annex-standalone dosfstools
+        # 500 MB VFAT FS in a box
+        sudo dd if=/dev/zero of=/crippledfs.img count=500 bs=1M
+        sudo mkfs.vfat /crippledfs.img
+        # mount
+        sudo mkdir /crippledfs
+        sudo mount -o "uid=$(id -u),gid=$(id -g)" /crippledfs.img /crippledfs
+    - name: Set up environment
+      run: |
+        git config --global user.email "test@github.land"
+        git config --global user.name "GitHub Almighty"
+    - uses: actions/checkout@v1
+    - name: Set up Python 3.6
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.6
+    - name: Install dependencies
+      run: |
+        pip install -r requirements-devel.txt
+        python -m pip install --upgrade pip
+    - name: Installation
+      run: |
+        # package install
+        python -m pip install .
+    - name: Run tests
+      env:
+        # forces all test repos/paths into the VFAT FS
+        TMPDIR: /crippledfs
+      run: |
+        mkdir -p __testhome__
+        cd __testhome__
+        # give detailed info on actual test setup
+        datalad wtf
+        echo "== mount >>"
+        mount
+        echo "<< mount =="
+        python -m nose -s -v --with-doctest --with-coverage --cover-package datalad_neuroimaging datalad_neuroimaging