Support GitHub-Flavored Markdown and other extensions

[simonw]

https://py-gfm.readthedocs.io/en/latest/

diff --git a/datasette_render_markdown/__init__.py b/datasette_render_markdown/__init__.py
index 018f433..826b9b5 100644
--- a/datasette_render_markdown/__init__.py
+++ b/datasette_render_markdown/__init__.py
@@ -3,6 +3,7 @@ import bleach
 import markdown
 from datasette import hookimpl
 import jinja2
+from mdx_gfm import GithubFlavoredMarkdownExtension
 
 
 @hookimpl()
@@ -19,7 +20,11 @@ def render_cell(value, column):
 def render_markdown(value):
     html = bleach.linkify(
         bleach.clean(
-            markdown.markdown(value, output_format="html5"),
+            markdown.markdown(
+                value,
+                output_format="html5",
+                extensions=[GithubFlavoredMarkdownExtension()],
+            ),
             tags=[
                 "a",
                 "abbr",

[simonw]

I'm torn on whether this should be the default behaviour. My use-cases for this plugin all revolve around data pulled from the GitHub API using github-to-sqlite.

[simonw]

I could have columns ending in _gfm use this, while columns ending in _markdown or _md stick with regular markdown. Then I can add configuration in #1.

[simonw]

I can support other extensions too: https://python-markdown.github.io/extensions/ and https://github.com/Python-Markdown/markdown/wiki/Third-Party-Extensions

[simonw]

Example from the docs:

markdown.markdown(some_text, extensions=[
    MyExtClass(),
    'myext',
    'path.to.my.ext:MyExtClass'
])

So supporting "extensions": ["myext"] in metadata configuration should work here.

For GFM I think that will be "mdx_gfm:GithubFlavoredMarkdownExtension".

[simonw]

Fixed in #4.

[simonw]

Released in 1.1.