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Date:   Sat, 5 Jun 2021 12:11:09 -0300
From:   =?utf-8?B?TsOtY29sYXMgRi4gUi4gQS4=?= Prado <n@nfraprado.net>
To:     Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc:     Jonathan Corbet <corbet@lwn.net>,
        Linux Doc Mailing List <linux-doc@vger.kernel.org>,
        linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
        coresight@lists.linaro.org, devicetree@vger.kernel.org,
        kunit-dev@googlegroups.com, kvm@vger.kernel.org,
        linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-gpio@vger.kernel.org, linux-hwmon@vger.kernel.org,
        linux-i2c@vger.kernel.org, linux-kselftest@vger.kernel.org,
        linux-media@vger.kernel.org, linux-pci@vger.kernel.org,
        linux-pm@vger.kernel.org, linux-security-module@vger.kernel.org,
        netdev@vger.kernel.org
Subject: Re: [PATCH 00/34] docs: avoid using ReST :doc:`foo` tag
Message-ID: <20210605151109.axm3wzbcstsyxczp@notapiano>
References: <cover.1622898327.git.mchehab+huawei@kernel.org>
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Hi Mauro,

On Sat, Jun 05, 2021 at 03:17:59PM +0200, Mauro Carvalho Chehab wrote:
> As discussed at:
> 	https://lore.kernel.org/linux-doc/871r9k6rmy.fsf@meer.lwn.net/
> 
> 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.

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.

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

Thanks,
N?colas

[1] https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#definition-lists

> 
> On this series:
> 
> Patch 1 manually adjust the references inside driver-api/pm/devices.rst,
> as there it uses :file:`foo` to refer to some Documentation/ files;
> 
> Patch 2 converts a table at Documentation/dev-tools/kunit/api/index.rst
> into a list, carefully avoiding the 
> 
> Patch 3 converts the cross-references at the media documentation, also
> avoiding the automarkup.py bug;
> 
> Patches 4-34 convert the other occurrences via a replace script. They were
> manually edited, in order to honour 80-columns where possible.
> 
> I did a diff between the Sphinx 2.4.4 output before and after this patch
> series in order to double-check that all converted Documentation/ 
> references will produce <a href=<foo>.rst>foo title</a> tags.
> 
> Mauro Carvalho Chehab (34):
>   docs: devices.rst: better reference documentation docs
>   docs: dev-tools: kunit: don't use a table for docs name
>   media: docs: */media/index.rst: don't use ReST doc:`foo`
>   media: userspace-api: avoid using ReST :doc:`foo` markup
>   media: driver-api: drivers: avoid using ReST :doc:`foo` markup
>   media: admin-guide: avoid using ReST :doc:`foo` markup
>   docs: admin-guide: pm: avoid using ReSt :doc:`foo` markup
>   docs: admin-guide: hw-vuln: avoid using ReST :doc:`foo` markup
>   docs: admin-guide: sysctl: avoid using ReST :doc:`foo` markup
>   docs: block: biodoc.rst: avoid using ReSt :doc:`foo` markup
>   docs: bpf: bpf_lsm.rst: avoid using ReSt :doc:`foo` markup
>   docs: core-api: avoid using ReSt :doc:`foo` markup
>   docs: dev-tools: testing-overview.rst: avoid using ReSt :doc:`foo`
>     markup
>   docs: dev-tools: kunit: avoid using ReST :doc:`foo` markup
>   docs: devicetree: bindings: submitting-patches.rst: avoid using ReSt
>     :doc:`foo` markup
>   docs: doc-guide: avoid using ReSt :doc:`foo` markup
>   docs: driver-api: avoid using ReSt :doc:`foo` markup
>   docs: driver-api: gpio: using-gpio.rst: avoid using ReSt :doc:`foo`
>     markup
>   docs: driver-api: surface_aggregator: avoid using ReSt :doc:`foo`
>     markup
>   docs: driver-api: usb: avoid using ReSt :doc:`foo` markup
>   docs: firmware-guide: acpi: avoid using ReSt :doc:`foo` markup
>   docs: hwmon: adm1177.rst: avoid using ReSt :doc:`foo` markup
>   docs: i2c: avoid using ReSt :doc:`foo` markup
>   docs: kernel-hacking: hacking.rst: avoid using ReSt :doc:`foo` markup
>   docs: networking: devlink: avoid using ReSt :doc:`foo` markup
>   docs: PCI: endpoint: pci-endpoint-cfs.rst: avoid using ReSt :doc:`foo`
>     markup
>   docs: PCI: pci.rst: avoid using ReSt :doc:`foo` markup
>   docs: process: submitting-patches.rst: avoid using ReSt :doc:`foo`
>     markup
>   docs: security: landlock.rst: avoid using ReSt :doc:`foo` markup
>   docs: trace: coresight: coresight.rst: avoid using ReSt :doc:`foo`
>     markup
>   docs: trace: ftrace.rst: avoid using ReSt :doc:`foo` markup
>   docs: userspace-api: landlock.rst: avoid using ReSt :doc:`foo` markup
>   docs: virt: kvm: s390-pv-boot.rst: avoid using ReSt :doc:`foo` markup
>   docs: x86: avoid using ReSt :doc:`foo` markup
> 
>  .../PCI/endpoint/pci-endpoint-cfs.rst         |  2 +-
>  Documentation/PCI/pci.rst                     |  6 +--
>  .../special-register-buffer-data-sampling.rst |  3 +-
>  Documentation/admin-guide/media/bt8xx.rst     | 15 ++++----
>  Documentation/admin-guide/media/bttv.rst      | 21 ++++++-----
>  Documentation/admin-guide/media/index.rst     | 12 +++---
>  Documentation/admin-guide/media/saa7134.rst   |  3 +-
>  Documentation/admin-guide/pm/intel_idle.rst   | 16 +++++---
>  Documentation/admin-guide/pm/intel_pstate.rst |  9 +++--
>  Documentation/admin-guide/sysctl/abi.rst      |  2 +-
>  Documentation/admin-guide/sysctl/kernel.rst   | 37 ++++++++++---------
>  Documentation/block/biodoc.rst                |  2 +-
>  Documentation/bpf/bpf_lsm.rst                 | 13 ++++---
>  .../core-api/bus-virt-phys-mapping.rst        |  2 +-
>  Documentation/core-api/dma-api.rst            |  5 ++-
>  Documentation/core-api/dma-isa-lpc.rst        |  2 +-
>  Documentation/core-api/index.rst              |  4 +-
>  Documentation/dev-tools/kunit/api/index.rst   |  8 ++--
>  Documentation/dev-tools/kunit/faq.rst         |  2 +-
>  Documentation/dev-tools/kunit/index.rst       | 14 +++----
>  Documentation/dev-tools/kunit/start.rst       |  6 +--
>  Documentation/dev-tools/kunit/tips.rst        |  5 ++-
>  Documentation/dev-tools/kunit/usage.rst       |  8 ++--
>  Documentation/dev-tools/testing-overview.rst  | 16 ++++----
>  .../bindings/submitting-patches.rst           | 11 +++---
>  Documentation/doc-guide/contributing.rst      |  8 ++--
>  Documentation/driver-api/gpio/using-gpio.rst  |  4 +-
>  Documentation/driver-api/ioctl.rst            |  2 +-
>  .../driver-api/media/drivers/bttv-devel.rst   |  2 +-
>  Documentation/driver-api/media/index.rst      | 10 +++--
>  Documentation/driver-api/pm/devices.rst       |  8 ++--
>  .../surface_aggregator/clients/index.rst      |  3 +-
>  .../surface_aggregator/internal.rst           | 15 ++++----
>  .../surface_aggregator/overview.rst           |  6 ++-
>  Documentation/driver-api/usb/dma.rst          |  6 +--
>  .../acpi/dsd/data-node-references.rst         |  3 +-
>  .../firmware-guide/acpi/dsd/graph.rst         |  2 +-
>  .../firmware-guide/acpi/enumeration.rst       |  7 ++--
>  Documentation/hwmon/adm1177.rst               |  3 +-
>  Documentation/i2c/instantiating-devices.rst   |  2 +-
>  Documentation/i2c/old-module-parameters.rst   |  3 +-
>  Documentation/i2c/smbus-protocol.rst          |  4 +-
>  Documentation/kernel-hacking/hacking.rst      |  4 +-
>  .../networking/devlink/devlink-region.rst     |  2 +-
>  .../networking/devlink/devlink-trap.rst       |  4 +-
>  Documentation/process/submitting-patches.rst  | 32 ++++++++--------
>  Documentation/security/landlock.rst           |  3 +-
>  Documentation/trace/coresight/coresight.rst   |  8 ++--
>  Documentation/trace/ftrace.rst                |  2 +-
>  Documentation/userspace-api/landlock.rst      | 11 +++---
>  .../userspace-api/media/glossary.rst          |  2 +-
>  Documentation/userspace-api/media/index.rst   | 12 +++---
>  Documentation/virt/kvm/s390-pv-boot.rst       |  2 +-
>  Documentation/x86/boot.rst                    |  4 +-
>  Documentation/x86/mtrr.rst                    |  2 +-
>  55 files changed, 217 insertions(+), 183 deletions(-)
> 
> -- 
> 2.31.1
> 
>