[docutils:feature-requests] #86 Replace recommonmark with myst-docutils

- **status**: open-fixed --> closed-fixed
- **Comment**:

Release 0.19 (2022-07-05) supports parsing "Markdown" input with 3rd party parsers
  myst, pycmark, or recommonmark.
  Examples:
  Master documents
  
      #> docutils --parser=markdown README.md README.html
                
Included documents:
~~~rst
.. include:: README.md
    :parser: markdown
~~~    
Thank you for your contributions



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** [feature-requests:#86] Replace recommonmark with myst-docutils**

**Status:** closed-fixed
**Group:** Default
**Created:** Sun Jan 02, 2022 01:26 PM UTC by Chris Sewell
**Last Updated:** Thu Jan 06, 2022 02:07 PM UTC
**Owner:** nobody


Hey guys,

As discussed in https://github.com/readthedocs/recommonmark/issues/221, recommonmark has been officially deprecated in favour of https://github.com/executablebooks/MyST-Parser/.

In myst-parser v0.16, I added first-class support for direct docutils use (as opposed to via sphinx) and introduced the parallel https://pypi.org/project/myst-docutils/ distribution, which is myst-parser but without explicit install requirements on docutils or sphinx, i.e. you can install myst-docutils with any version of docutils and it will work without sphinx installed.

receive(see https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md#0160---2021-12-06, https://github.com/executablebooks/MyST-Parser/issues/347, and https://myst-parser.readthedocs.io/en/latest/docutils.html) 
receive
receiveIn the master branch (and soon to be myst-docutils v0.17) I have also been working to improve the rigour of the behaviour/testing against this parser.
(as an example, I believe your current recommonmark solution does not actually work properly with code fences, because it does not syntax highlight the code, see: https://github.com/executablebooks/MyST-Parser/pull/478)

The fixture test sets, essentially provide a full specification of the Markdown -> docutils AST conversion (pre-docutils-transforms):

- https://raw.githubusercontent.com/executablebooks/MyST-Parser/master/tests/test_renderers/fixtures/docutil_syntax_elements.md
- https://raw.githubusercontent.com/executablebooks/MyST-Parser/master/tests/test_renderers/fixtures/docutil_roles.md
-  https://raw.githubusercontent.com/executablebooks/MyST-Parser/master/tests/test_renderers/fixtures/docutil_directives.md

and are currently tested in the CI for myst-docutils against docutils v0.16, v0.17 and v0.18: https://github.com/executablebooks/MyST-Parser/runs/4670995311?check_suite_focus=true

I'm also happy to recieve any feedback /  improvement suggestions to facilitate this, and have opened a parallel discussion topic here: https://github.com/executablebooks/MyST-Parser/discussions/487

Cheer,
Chris



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