Repository: kovetskiy/mark (go)

Issue:
Macro :children: is failing because of missing title
Hi,

I use the following markdown file (test.md) to create a Confluence page:

```
<!-- Space: TestSpace -->
<!-- Macro: :children:
     Template: ac:children
     Style: h2
     Excerpt: none
     Page: TestSpace:Test
     Reverse: false
     All: true -->

# Test

:children:
```

The configuration file that I use:

```
username = "username"
password = "password"
base_url = "url"
h1_title = true
h1_drop = true
```

When I run **mark --title-from-h1 --trace --debug -f test.md** I get the following error:

```
2022-08-23 14:51:44.799 INFO  processing test.md
2022-08-23 14:51:44.799 FATAL page title is not set ('Title' header is not set and '--title-from-h1' option and 'h1_title' config is not set or there is no H1 in the file)
```

As soon as I add the Mark header **<!-- Title: <title> -->** the error message is gone and I receive a 200 response.

I guess this is a bug, because I use the **--title-from-h1** option. Can this be the case, because my configuration file has the **h1_drop** option.

I don't mind to create a pull request and figure out if I can solve this issue, but I don't have any experience with Go and need some help to start.

Pull request description:
fix: Title not being extracted when not on the first line
While a page with a macro is processed, having a macro leaves an unclean buffer for further processing steps, including title extraction.  The problem seems to come from `ExtractMeta`: as it runs through the metadata, it hits the first line of the macro but since it doesn't look like a complete Metadata (e.g. matching either `\[\]:\s*#\s*\(([^:]+):\s*(.*)\)` or `<!--\s*([^:]+):\s*(.*)\s*-->` in
https://github.com/kovetskiy/mark/blob/master/pkg/mark/meta.go#L37:L38, it will break the loop in
https://github.com/kovetskiy/mark/blob/master/pkg/mark/meta.go#L61 and return the final document as:
```
  Template: ac:children
  Style: h2
  Excerpt: none
  Page:
  TestSpace:Test
  Reverse: false
  All: true -->

:children:
```

This then goes into `ExtractDocumentLeadingH1` which doesn't find a match for the regex `^#[^#]\s*(.*)\s*\n`, returning an empty title since the title is not on the first line. This first commit, while it doesn't fix the unclean document, fixes the regex to properly find the title.

The second commit makes sure we properly return the macro when hitting one as we process metadata.

Closes #214

Patch:
diff --git a/README.md b/README.md
index 1e70b76..f288534 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,9 @@ be replaced with specified template:
      <yaml-data> -->
 ```
 
+**NOTE**: Make sure to define your macros after your metadata (Title/Space), 
+mark will stop processing metadata if it hits a Macro.
+
 Capture groups can be defined in the macro's <regexp> which can be later
 referenced in the `<yaml-data>` using `${<number>}` syntax, where `<number>` is
 number of a capture group in regexp (`${0}` is used for entire regexp match),
diff --git a/go.mod b/go.mod
index c136e87..165858e 100644
--- a/go.mod
+++ b/go.mod
@@ -5,23 +5,28 @@ go 1.17
 require (
 	github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
 	github.com/kovetskiy/blackfriday/v2 v2.3.0
-	github.com/kovetskiy/gopencils v0.0.0-20230119081704-a73db75b2f69
-	github.com/kovetskiy/ko v1.6.0
+	github.com/kovetskiy/gopencils v0.0.0-20210811071033-d690b7a013fb
+	github.com/kovetskiy/ko v1.5.0
 	github.com/kovetskiy/lorg v1.2.0
 	github.com/reconquest/karma-go v0.0.0-20220904173930-21741aa386a6
-	github.com/reconquest/pkg v1.3.0
+	github.com/reconquest/pkg v1.2.0
 	github.com/reconquest/regexputil-go v0.0.0-20160905154124-38573e70c1f4
-	github.com/stretchr/testify v1.8.1
+	github.com/stretchr/testify v1.8.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/BurntSushi/toml v1.2.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/iancoleman/strcase v0.2.0 // indirect
+	github.com/kovetskiy/toml v0.2.0 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/reconquest/cog v0.0.0-20210820140837-c5c4e8f49c65 // indirect
+	github.com/reconquest/colorgful v0.0.0-20210914131800-3b7d32bf77e5 // indirect
+	github.com/reconquest/loreley v0.0.0-20211011075601-29b1d7b0ad91 // indirect
 	github.com/zazab/zhash v0.0.0-20210630080733-6e809466f8d3 // indirect
+	golang.org/x/crypto v0.0.0-20220829220503-c86fa9a7ed90 // indirect
+	golang.org/x/sys v0.0.0-20220915200043-7b5979e65e41 // indirect
+	golang.org/x/term v0.0.0-20220722155259-a9ba230a4035 // indirect
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 )
diff --git a/go.sum b/go.sum
index 815d66c..851ce11 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,6 @@
-cloud.google.com/go/compute/metadata v0.2.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
 github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/BurntSushi/toml v1.2.0 h1:Rt8g24XnyGTyglgET/PRUNlrUeu9F5L+7FilkXfZgs0=
 github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/BurntSushi/toml v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
-github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMomdKFjzJNB0c=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -11,22 +9,19 @@ github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815 h1:bWDMxwH3px2JBh
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZifjYj7uP3BG/gKcuzL9xWVV/Y+cK33KM=
 github.com/go-chi/chi v4.1.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/iancoleman/strcase v0.2.0 h1:05I4QRnGpI0m37iZQRuskXh+w77mr6Z41lwQzuHLwW0=
 github.com/iancoleman/strcase v0.2.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
 github.com/kovetskiy/blackfriday/v2 v2.3.0 h1:KKABLPopQ2+DWKtM/ifx0RijGz09mNlCuEcZy5KvZVA=
 github.com/kovetskiy/blackfriday/v2 v2.3.0/go.mod h1:ES7tjNJdnHp1h8dib5cmoa//rgvQeYrtzGzGM/Kozk4=
-github.com/kovetskiy/gopencils v0.0.0-20230119081704-a73db75b2f69 h1:vn82v0gKhTTm67znr7nxYBNW4mJ8zfY7dywZivUy3tY=
-github.com/kovetskiy/gopencils v0.0.0-20230119081704-a73db75b2f69/go.mod h1:t7LFI5v8Q5+nl9sqId9PS0C9H9F4c5d4XlhkLve1MCM=
-github.com/kovetskiy/ko v1.6.0 h1:LPIu9Y/5qIarxGZZgCMmcAgFfKe7WLLBQpPBTLaTKp4=
-github.com/kovetskiy/ko v1.6.0/go.mod h1:WH6doo9XYpbDWe9HsELro1vXAfXCM4ByG5arIp9JjDE=
+github.com/kovetskiy/gopencils v0.0.0-20210811071033-d690b7a013fb h1:Pg8RP2ww0N4kwwep8PTULXEHyFHIrOVQjxdfcjGWCtE=
+github.com/kovetskiy/gopencils v0.0.0-20210811071033-d690b7a013fb/go.mod h1:rn9YsgK4kxBDPZn+hOwSmg6MdtWfF2ejC3tvgDjWyBM=
+github.com/kovetskiy/ko v1.5.0 h1:KF16TP07Tk9+Cp+MlZuc4PAGeAKKEgleC5RIs4uqZUo=
+github.com/kovetskiy/ko v1.5.0/go.mod h1:IwT7f+dU5W7xNhy+DeaFbxuDCS67SYHWVFGpKHCrU7A=
 github.com/kovetskiy/lorg v0.0.0-20200107130803-9a7136a95634/go.mod h1:B8HeKAukXULNzWWsW5k/SQyDkiQZPn7lTBJDB46MZ9I=
 github.com/kovetskiy/lorg v1.2.0 h1:wNIUT/VOhcjKOmizDClZLvchbKFGW+dzf9fQXbSVS5E=
 github.com/kovetskiy/lorg v1.2.0/go.mod h1:rdiamaIRUCkX9HtFZd0D9dQqUbad21hipHk+sat7Z6s=
+github.com/kovetskiy/toml v0.2.0 h1:tMsPGWE3ejTjXop10/17b/tDtbwQJZdBfc0e+l3WndA=
+github.com/kovetskiy/toml v0.2.0/go.mod h1:+nh++V8wCesSlfPA3DSXGO1hiAHDVHDqem4ixTsWuRY=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -36,60 +31,46 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/reconquest/cog v0.0.0-20210820140837-c5c4e8f49c65 h1:IiAAeijD0sU3C6OO9vy/0WUUfRabZ1aH7hijCBteJC4=
 github.com/reconquest/cog v0.0.0-20210820140837-c5c4e8f49c65/go.mod h1:iin2k2yhKESAy14B2fXK8gpf1nofl7dTXH5U+VdIlss=
+github.com/reconquest/colorgful v0.0.0-20210914131800-3b7d32bf77e5 h1:zQyJkHMuhL9DZpK2TgepcpW5eRbuyzgBEaE1TMsemJc=
+github.com/reconquest/colorgful v0.0.0-20210914131800-3b7d32bf77e5/go.mod h1:osXRwScBYylQ/ZvfwWXOIqGcjRCk+p0nc5oFnqqgVAY=
 github.com/reconquest/karma-go v0.0.0-20200928103525-22da92476de6/go.mod h1:yuQiKpTdmXSX7E+h+3dD4jx09P/gHc67mRxN3eFLt7o=
+github.com/reconquest/karma-go v0.0.0-20211029072727-6027c6225ce4/go.mod h1:0SJV7OD+RmNxn0wsLWXQIVYiKS3szqhFv5PQvjLX2Ds=
 github.com/reconquest/karma-go v0.0.0-20220904173930-21741aa386a6 h1:wSI9nn6ZDtuA4Coi6oWmhBqSHGLUK2XRhn9x/4QCCMY=
 github.com/reconquest/karma-go v0.0.0-20220904173930-21741aa386a6/go.mod h1:qMQ8twYxBpCJ4IYrAnMDBtdNMj0ZTH+kcu94ZIY6vDU=
-github.com/reconquest/pkg v1.3.0 h1:Yuoxiw92rP/srKXMo5qSML2InhJ+xAqHJIx3/y/2zh8=
-github.com/reconquest/pkg v1.3.0/go.mod h1:hUQ0SzzBlFRSbo6lFYG2tSpLMjqOuUqm2LtpjR/+1sg=
+github.com/reconquest/loreley v0.0.0-20200601121626-621c1cd37fd1/go.mod h1:1NF/j951kWm+ZnRXpOkBqweImgwhlzFVwTA4A0V7TEU=
+github.com/reconquest/loreley v0.0.0-20211011075601-29b1d7b0ad91 h1:HuOjsuPj5mcsq/EagIovIS240SNUA+u4vLak5GcS12s=
+github.com/reconquest/loreley v0.0.0-20211011075601-29b1d7b0ad91/go.mod h1:nz+IRceapGhOTxO5cOJiu0Xc2qfEkEnR+qS6damNixI=
+github.com/reconquest/pkg v1.2.0 h1:JPvoTRsTgZtq9h+LR1Us5eptwxY/bm5fwFIfpoqjbiI=
+github.com/reconquest/pkg v1.2.0/go.mod h1:Vi/daq1mwc3nhbA/uhqjd0SZs9KXUPEiKqvroaq6rfc=
 github.com/reconquest/regexputil-go v0.0.0-20160905154124-38573e70c1f4 h1:bcDXaTFC09IIg13Z8gfQHk4gSu001ET7ssW/wKRvPzg=
 github.com/reconquest/regexputil-go v0.0.0-20160905154124-38573e70c1f4/go.mod h1:OI1di2iiFSwX3D70iZjzdmCPPfssjOl+HX40tI3VaXA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/xtgo/uuid v0.0.0-20140804021211-a0b114877d4c/go.mod h1:UrdRz5enIKZ63MEE3IF9l2/ebyx59GyGgPi+tICQdmM=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/zazab/zhash v0.0.0-20210630080733-6e809466f8d3 h1:BhVaeQJc3xalHGONn215FylzuxdQBIT3d/aRjDg4nXQ=
 github.com/zazab/zhash v0.0.0-20210630080733-6e809466f8d3/go.mod h1:NtepZ8TEXErPsmQDMUoN72f8aIy4+xNinSJ3f1giess=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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-golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
-golang.org/x/oauth2 v0.4.0/go.mod h1:RznEsdpjGAINPTOF0UH/t+xJ75L18YO3Ho6Pyn+uRec=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.4.0/go.mod h1:9P2UbLfCdcvo3p/nzKvsmas4TnlujnuoV9hGgYzW1lQ=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/term v0.0.0-20220722155259-a9ba230a4035 h1:Q5284mrmYTpACcm+eAKjKJH48BBwSyfJqmmGDTtT8Vc=
+golang.org/x/term v0.0.0-20220722155259-a9ba230a4035/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.6.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/pkg/mark/markdown.go b/pkg/mark/markdown.go
index 98576c0..ddea59f 100644
--- a/pkg/mark/markdown.go
+++ b/pkg/mark/markdown.go
@@ -345,7 +345,7 @@ func DropDocumentLeadingH1(
 
 // ExtractDocumentLeadingH1 will extract leading H1 heading
 func ExtractDocumentLeadingH1(markdown []byte) string {
-	h1 := regexp.MustCompile(`^#[^#]\s*(.*)\s*\n`)
+	h1 := regexp.MustCompile(`#[^#]\s*(.*)\s*\n`)
 	groups := h1.FindSubmatch(markdown)
 	if groups == nil {
 		return ""
diff --git a/pkg/mark/meta.go b/pkg/mark/meta.go
index 2f1a301..416182b 100644
--- a/pkg/mark/meta.go
+++ b/pkg/mark/meta.go
@@ -34,8 +34,9 @@ type Meta struct {
 }
 
 var (
-	reHeaderPatternV1 = regexp.MustCompile(`\[\]:\s*#\s*\(([^:]+):\s*(.*)\)`)
-	reHeaderPatternV2 = regexp.MustCompile(`<!--\s*([^:]+):\s*(.*)\s*-->`)
+	reHeaderPatternV1    = regexp.MustCompile(`\[\]:\s*#\s*\(([^:]+):\s*(.*)\)`)
+	reHeaderPatternV2    = regexp.MustCompile(`<!--\s*([^:]+):\s*(.*)\s*-->`)
+	reHeaderPatternMacro = regexp.MustCompile(`<!-- Macro: .*`)
 )
 
 func ExtractMeta(data []byte) (*Meta, []byte, error) {
@@ -58,6 +59,12 @@ func ExtractMeta(data []byte) (*Meta, []byte, error) {
 		if matches == nil {
 			matches = reHeaderPatternV1.FindStringSubmatch(line)
 			if matches == nil {
+				matches = reHeaderPatternMacro.FindStringSubmatch(line)
+				// If we have a match, then we started reading a macro.
+				// We want to keep it in the document for it to be read by ExtractMacros
+				if matches != nil {
+					offset -= len(line) + 1
+				}
 				break
 			}
 


Test patch:
diff --git a/pkg/mark/testdata/header.md b/pkg/mark/testdata/header.md
index 9c1d2f0..81a9738 100644
--- a/pkg/mark/testdata/header.md
+++ b/pkg/mark/testdata/header.md
@@ -1,3 +1,4 @@
+
 # a
 ## b
 ### c