AsciiDoc support

[senier]

It would be great if readme_renderer supported AsciiDoc natively. It has some very neat features and it would be nice to use the same format for our README as well as for the rest of the documentation. There is AsciiDoc3 to handle AsciiDoc in Python.

[chrysle]

I'll work on this.

[chrysle]

There is one complication I'd like to discuss before implementing anything. Related: asciidoctor/asciidoctor#3340

The Python port of AsciiDoc, AsciiDoc.py (legacy processor, asciidoc3 is based on that and was just ported earlier to Python 3. Also it seems to have fallen behind the better developed asciidoc.), isn't totally compliant with the latest AsciiDoctor language spec - although that is on their roadmap.

However with this in mind I don't see any alternative to just creating the renderer on top of the Python implementation and pointing out it only supports the spec published by the AsciiDoc.py project until they have caught up.

@di @miketheman What do you think?

[lfvjimisola]

There has been a discussion about this in the AsciiDoc ZulipChat forum with @mojavelinux among others.

The lack of an updated python implementation is a clear issue. The is a Language Specification is in progress and once that is finalized implementations in other languages can be implemented.

I'm not sure how much difference there is between AsciiDoc.py and AsciiDoctor, but work case is that AsciiDoc.py is a AsciiDoc-flavor nowadays.

[chrysle]

Gentle ping on this @pypa/readme_renderer-committers.