Re: [PATCH v8 13/13] docs: parser_yaml.py: fix backward compatibility with old docutils

[Akira Yokosawa <akiyks@gmail.com>]

Hi Mauro,

On Thu, 26 Jun 2025 10:13:09 +0200, Mauro Carvalho Chehab wrote:
> As reported by Akira, older docutils versions are not compatible
> with the way some Sphinx versions send tab_width. Add a code to
> address it.
> 

Tested OK against debian:11's and almalinux:9's Sphinx 3.4.3, both of
which have docutils 0.16 bundled.

opensuse/leap:15.6's Sphinx 4.2.0 has docutils 0.16 with it, but it is
python 3.6 base and it does't work with the ynl integration.
As opensuse/leap:15.6 provides Sphinx 7.2.6 (on top of python 3.11) as
an alternative, obsoleting it should be acceptable.  

Reported-by: Akira Yokosawa <akiyks@gmail.com>
> Closes: https://lore.kernel.org/linux-doc/598b2cb7-2fd7-4388-96ba-2ddf0ab55d2a@gmail.com/
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Tested-by: Akira Yokosawa <akiyks@gmail.com>

        Thanks, Akira

> ---
>  Documentation/sphinx/parser_yaml.py | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/sphinx/parser_yaml.py b/Documentation/sphinx/parser_yaml.py
> index 8288e2ff7c7c..1602b31f448e 100755
> --- a/Documentation/sphinx/parser_yaml.py
> +++ b/Documentation/sphinx/parser_yaml.py
> @@ -77,6 +77,10 @@ class YamlParser(Parser):
>  
>                  result.append(line, document.current_source, lineoffset)
>  
> +            # Fix backward compatibility with docutils < 0.17.1
> +            if "tab_width" not in vars(document.settings):
> +                document.settings.tab_width = 8
> +
>              rst_parser = RSTParser()
>              rst_parser.parse('\n'.join(result), document)
>