Make it possible to configure extensions (e.g. markdown extras)

[garyvdm]

I would like to be able to change the markdown extras used.

This would require some mechanism to provide configuration information to a extension.

[colinta]

Definitely something I've considered.

global config would make this possible, and that's the easiest way to add support. I also think that the jinja2 extension could look for options so that you can control this per-tag. e.g.

config.yaml

extensions:
  # i prefer misaka these days
  - strange_case.extensions.misaka
  # but markdown2 would have similar configurability
  - strange_case.extensions.markdown
misaka:
  # arguments to the misaka.Markdown() constructor
  markdown: [fenced_code, no_intra_emphasis, strikethrough, superscript, tables]
  # arguments to the misaka.HtmlRenderer() constructor
  renderer: [smartypants]
markdown:
  extras: [ fenced-code-blocks, header-ids, code-friendly ]

jinja2 tag

{# misaka.  i'm not sure how to detect renderer vs html options other than
   maintaining a list of available options somewhere #}
{% markdown no_intra_emphasis strikethrough autolink skip_html %}
{# markdown2 #}
{% markdown fenced_code %}

I'll see what I can whip up, not a lot of time in the near future, but I'll definitely get to this. The tag version is easier, it's a matter of searching for arguments, and using a different markdowner function than the default.

renderer = MyRenderer(m.HTML_SMARTYPANTS)
markdowner = m.Markdown(renderer, m.EXT_FENCED_CODE | m.EXT_NO_INTRA_EMPHASIS |
                                  m.EXT_STRIKETHROUGH | m.EXT_SUPERSCRIPT |
                                  m.EXT_TABLES)