linux-kernel - Re: [PATCH 4/5] docs: by default, build docs a lot faster with Sphinx >= 1.7

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Message-ID: <20190530120824.6bc5594c@coco.lan>
Date:   Thu, 30 May 2019 12:08:24 -0300
From:   Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
To:     Jonathan Corbet <corbet@....net>
Cc:     Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] docs: by default, build docs a lot faster with
 Sphinx >= 1.7

Em Thu, 30 May 2019 08:54:04 -0600
Jonathan Corbet <corbet@....net> escreveu:

> On Wed, 29 May 2019 22:53:05 -0300
> Mauro Carvalho Chehab <mchehab+samsung@...nel.org> wrote:
> 
> > > Yup.  The point is that I see the sphinx-build output *in the docs-build
> > > output", not when I run it standalone (where it does the expected thing).    
> > 
> > Weird... could some versions of Sphinx be redirecting the output of
> > --version to stderr instead of stdout?
> > 
> > If so, something like:
> > 
> > 	perl -e 'open IN,"sphinx-build --version 2>&1 |"; while (<IN>) { if (m/([\d\.]+)/) { print "-jauto\n" if ($1 >= "1.7") } ;} close IN'
> > 
> > would make it print "-jauto" with those other versions you're trying.  
> 
> That does improve the behavior from the command line; it seems that
> sphinx-build is indeed writing to stderr.  BUT that still doesn't fix the
> docs build!  To get the option to take effect, I also have to explicitly
> export SPHINXOPTS.  So the winning combination is:
> 
>   export SPHINXOPTS = $(shell perl -e 'open IN,"sphinx-build --version
>   2>&1 |"; while (<IN>) { if (m/([\d\.]+)/) { print "-jauto" if ($$1 >= "1.7") } ;} close IN')  
> 
> I don't have any weird version of make, so I'm not sure why you see
> different results than I do here.
> 
> I can apply those tweaks to your patch if it's OK with you.

Yeah, sure! With those changes it work fine here too.

So, feel free to apply the changes.

> 
> > I didn't try the python2 versions, though.  
> 
> Interestingly, I would appear to have both versions installed, with
> python2 winning in $PATH.

It sounds that Fedora 30 is conservative with regards to python :-)

The Sphinx version detection script takes it into account,
suggesting pip3 instead of pip - or when called like:

	$ ./scripts/sphinx-pre-install --no-virtualenv
	Detected OS: Fedora release 30 (Thirty).

	ERROR: please install "python-sphinx", otherwise, build won't work.
	Warning: better to also install "sphinx_rtd_theme".
	You should run:

		sudo dnf install -y python3-sphinx python3-sphinx_rtd_theme

It seeks for the python3 packages on Fedora.

Regards,
Mauro