Re: [PATCH] doc-rst: get rid of warnings at kernel-documentation.rst

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Em Wed, 20 Jul 2016 16:49:59 +0200
Markus Heiser <markus.heiser@xxxxxxxxxxx> escreveu:

> Am 20.07.2016 um 16:31 schrieb Jonathan Corbet <corbet@xxxxxxx>:
> 
> > On Wed, 20 Jul 2016 16:23:28 +0200
> > Markus Heiser <markus.heiser@xxxxxxxxxxx> wrote:
> >   
> >> Am 20.07.2016 um 16:11 schrieb Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>:
> >>   
> >>> Sphinx 1.4.5 complains about some literal blocks at
> >>> kernel-documentation.rst:
> >>> 
> >>> 	Documentation/kernel-documentation.rst:373: WARNING: Could not lex literal_block as "C". Highlighting skipped.
> >>> 	Documentation/kernel-documentation.rst:378: WARNING: Could not lex literal_block as "C". Highlighting skipped.
> >>> 	Documentation/kernel-documentation.rst:576: WARNING: Could not lex literal_block as "C". Highlighting skipped.
> >>> 
> >>> Fix it by telling Sphinx to consider them as "none" type.    
> >> 
> >> Hi Mauro,
> >> 
> >> IMHO we should better fix this by unsetting the lexers default language 
> >> in the conf.py  [1] ... currently:
> >> 
> >> highlight_language = 'C'  # set this to 'none'
> >> 	
> >> As far as I know the default highlight_language is also the default
> >> for literal blocks starting with "::"  
> > 
> > The thing with that is that a lot of literal blocks *do* have C code, even
> > in kernel-documentation.rst.  Setting that in conf.py would turn off all C
> > highlighting.  I think that might actually be a desirable outcome, but it
> > would be good to make that decision explicitly.
> > 
> > As it happens, I'd already fixed these particular warnings in docs-next:
> > 
> > 	http://permalink.gmane.org/gmane.linux.documentation/39806
> > 
> > I took a different approach; using code-block might actually be better.  
> 
> In some kernel-doc comments we have constructs like this:
> 
>  * host point of view, the graphic address space is partitioned by multiple
>  * vGPUs in different VMs.::
>  *
>  *                        vGPU1 view         Host view
>  *             0 ------> +-----------+     +-----------+
>  *               ^       |///////////|     |   vGPU3   |
>  *               |       |///////////|     +-----------+
>  *               |       |///////////|     |   vGPU2   |
>  *               |       +-----------+     +-----------+
>  *        mappable GM    | available | ==> |   vGPU1   |
>  *               |       +-----------+     +-----------+
> 
> I mean, in kernel-doc comments it would be nice to have no lexer
> active when starting a literal block with a double colon "::".
> Introducing a none highlighted literal block with a directive
> like ".. highlight::" or ".. code-block" is a bit verbose
> for a C comment.  And on the opposite, if one place a C construct
> in a literal block with a double colon "::", only the highlighting
> is missed, but we get now warning.
> 
> At least a code-block should be a code block, not a diagram 
> or anything other ...
> 
> I don't know whats the best ... but these are my 2cent :)

I actually think that the best would be if we could have a way to
"draw" graphs inside the documentation. We have a few cases of
diagrams like the above at the media documentation too.

As Sphinx seems to like ASCIIart, IMHO, the more Sphinx-style
way would be to have a:

.. code-block:: asciiart

markup to handle it.

Another possibility would be to have a graphviz extension.

> 
> --Markus--
> 
> 
> > 
> > jon
> > --
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> 



Thanks,
Mauro
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