Em Sat, 5 Jun 2021 12:11:09 -0300
Nícolas F. R. A. Prado [off-list ref] escreveu:

Hi Mauro,

On Sat, Jun 05, 2021 at 03:17:59PM +0200, Mauro Carvalho Chehab wrote:

quoted

As discussed at:
	https://lore.kernel.org/linux-doc/871r9k6rmy.fsf@meer.lwn.net/ (local)

It is better to avoid using :doc:`foo` to refer to Documentation/foo.rst, as the
automarkup.py extension should handle it automatically, on most cases.

There are a couple of exceptions to this rule:

1. when :doc:  tag is used to point to a kernel-doc DOC: markup;
2. when it is used with a named tag, e. g. :doc:`some name <foo>`;

It should also be noticed that automarkup.py has currently an issue:
if one use a markup like:

	Documentation/dev-tools/kunit/api/test.rst
	  - documents all of the standard testing API excluding mocking
	    or mocking related features.

or, even:

	Documentation/dev-tools/kunit/api/test.rst
	    documents all of the standard testing API excluding mocking
	    or mocking related features.
	
The automarkup.py will simply ignore it. Not sure why. This patch series
avoid the above patterns (which is present only on 4 files), but it would be
nice to have a followup patch fixing the issue at automarkup.py.  

What I think is happening here is that we're using rST's syntax for definition
lists [1]. automarkup.py ignores literal nodes, and perhaps a definition is
considered a literal by Sphinx. Adding a blank line after the Documentation/...
or removing the additional indentation makes it work, like you did in your
2nd and 3rd patch, since then it's not a definition anymore, although then the
visual output is different as well.

A literal has a different output. I think that this is not the case, but I 
didn't check the python code from docutils/Sphinx.
 

I'm not sure this is something we need to fix. Does it make sense to use
definition lists for links like that? If it does, I guess one option would be to
whitelist definition lists so they aren't ignored by automarkup, but I feel
this could get ugly really quickly.

Yes, we should avoid handling literal blocks, as this can be a nightmare.

FWIW note that it's also possible to use relative paths to docs with automarkup.

Not sure if you meant to say using something like ../driver-api/foo.rst.
If so, relative paths are a problem, as it will pass unnoticed by this script:

	./scripts/documentation-file-ref-check

which is meant to warn when a file is moved to be elsewhere. Ok, it
could be taught to use "../" to identify paths, but I suspect that this
could lead to false positives, like here:

	Documentation/usb/gadget-testing.rst:  # ln -s ../../uncompressed/u
	Documentation/usb/gadget-testing.rst:  # cd ../../class/fs
	Documentation/usb/gadget-testing.rst:  # ln -s ../../header/h

If you meant, instead, :doc:`../foo`, this series address those too.

Regards,
Mauro