[PATCH 1/1] doc: update Kernel documentation build system

[Heinrich Schuchardt]

On 1/25/21 12:59 AM, Tom Rini wrote:
> On Sun, Jan 24, 2021 at 10:05:27PM +0100, Heinrich Schuchardt wrote:
>> On 1/23/21 6:53 PM, Tom Rini wrote:
>>> On Sat, Jan 23, 2021 at 12:46:23PM -0500, Tom Rini wrote:
>>>> On Fri, Jan 01, 2021 at 01:21:11AM +0100, Heinrich Schuchardt wrote:
>>>>
>>>>> Update the docomentation build system according to Linux v5.11-rc1.
>>>>>
>>>>> With this patch we can build the HTML documentation using either of
>>>>> Sphinx 2 and Sphinx 3.
>>>>>
>>>>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
>>>>> Reviewed-by: Simon Glass <sjg at chromium.org>
>>>>
>>>> Applied to u-boot/master, thanks!
>>>
>>> I've had to revert this.  While I caught and fixed up in a semi-logical
>>> way one duplicate label problem, there's another now that I see, and
>>> probably many more once I rework that one.  It's unclear as well how
>>> best to handle these otherwise logical duplicate labels, such as "eMMC"
>>> in doc/board/microchip/mpfs_icicle.rst for example.
>>
>> Sphinx 2 is not available for current Linux distributions. Without this
>> patch we cannot build with Sphinx 3.
>
> We need to be careful when saying "current".  Ubuntu 18.04 is still
> quite current enough and will be until 2022 (as it doesn't go EOL until
> 2023).  I'm not sure I can even get Sphinx 3.

Developers will not be able to test the documentation if 'make htmldocs'
fails on their machines because their distribution does not provide
Sphinx 2.

The current Ubuntu release is 20.10 and provides Sphinx 3.2.
https://packages.ubuntu.com/groovy/sphinx-common.

Arch Linux is on Sphinx 3.4.
https://archlinux.org/packages/community/any/python-sphinx/

Best regards

Heinrich

>
>> All pages must be deduplicated. Instead of duplicate information
>> references have to be used.
>
> So long as it can be done in a way where documentation reads well still,
> yes.  For example, how should we re-write the example I mentioned so
> that "eMMC" isn't duplicated?
>
>> Once that is done and the patch is reapplied we must make sure that on
>> gitlab we use Sphinx 3 by moving to a current Ubuntu version.
>
> We'll have to figure out what to do about updating CI, but I'm not sure
> moving the host version is a good idea at this time.
>