Use a new markdown converter for sphinx

Recommonmark has many issues and is deprecated. The recommended
alternative is MyST-Parser. [1]

The myst parser looks great, it also correctly parses tables and adds the
correct links.

To test locallay run:
```
cd docs
rm -rf build/
\# install build deps
sudo dnf install python3-sphinx && pip install myst-parser
make html
python -m http.server 8000 --directory build/html
\# Now check in your browser if it looks good to you
```

[1] https://github.com/readthedocs/recommonmark/issues/221

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

2 files changed, 8 insertions, 20 deletions

diff --git a/docs/requirements.txt b/docs/requirements.txt
index 84e7ec6a5..3ba6d658f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,4 @@
 # requirements file for readthedocs pip installs
 
 # use md instead of rst
-recommonmark
-# needed for markdown table support
-sphinx-markdown-tables
+myst_parser
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8210022f2..7684dd3f7 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -15,7 +15,6 @@
 # sys.path.insert(0, os.path.abspath('.'))
 
 import re
-from recommonmark.transform import AutoStructify
 
 # -- Project information -----------------------------------------------------
 
@@ -29,7 +28,7 @@ author = "team"
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ["sphinx_markdown_tables", "recommonmark"]
+extensions = ["myst_parser"]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
@@ -63,27 +62,18 @@ html_css_files = [
 
 # -- Extension configuration -------------------------------------------------
 
+# IMPORTANT: explicitly unset the extensions, by default dollarmath is enabled.
+# We use the dollar sign as text and do not want it to be interpreted as math expression.
+myst_enable_extensions = []
+
 
 def convert_markdown_title(app, docname, source):
     # Process markdown files only
     docpath = app.env.doc2path(docname)
     if docpath.endswith(".md"):
-        # Convert pandoc title line into eval_rst block for recommonmark
-        source[0] = re.sub(r"^% (.*)", r"```eval_rst\n.. title:: \g<1>\n```", source[0])
+        # Convert pandoc title line into eval_rst block for myst_parser
+        source[0] = re.sub(r"^% (.*)", r"```{title} \g<1>\n```", source[0])
 
 
 def setup(app):
     app.connect("source-read", convert_markdown_title)
-
-    app.add_config_value(
-        "recommonmark_config",
-        {
-            "enable_eval_rst": True,
-            "enable_auto_doc_ref": False,
-            "enable_auto_toc_tree": False,
-            "enable_math": False,
-            "enable_inline_math": False,
-        },
-        True,
-    )
-    app.add_transform(AutoStructify)