[PATCH 2/2] meson: do not automatically build documentation if sphinx-build-3 is found

[Barnabás Pőcze]

Hi


2025. 04. 04. 18:12 keltezéssel, Quentin Schulz írta:
> From: Quentin Schulz <quentin.schulz at cherry.de>
> 
> Commit aba567338b25 ("Documentation: Move all dependencies into
> features") did an incomplete migration of the documentation boolean
> option into a documentation feature.
> 
> If sphinx-build-3 binary is found on the host system, the documentation
> is built, regardless of the value of the feature option.
> 
> This makes sure that sphinx-build-3 presence is only checked if the
> documentation feature is not disabled (which is the default, as it's
> "auto" by default).
> 
> This is essential for reproducibility for build systems where
> sphinx-build-3 may or may not be present when libcamera is built, and
> also to declutter the generated package if documentation isn't desired.
> 
> Fixes: aba567338b25 ("Documentation: Move all dependencies into features")
> Signed-off-by: Quentin Schulz <quentin.schulz at cherry.de>
> ---
>   Documentation/meson.build | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/meson.build b/Documentation/meson.build
> index 6158320e..c59849f6 100644
> --- a/Documentation/meson.build
> +++ b/Documentation/meson.build
> @@ -116,7 +116,7 @@ endif
>   # Sphinx
>   #
>   
> -sphinx = find_program('sphinx-build-3', required : false)
> +sphinx = find_program('sphinx-build-3', required : get_option('documentation'))

I think this is not entirely ideal. If `documentation=enabled`, `sphinx-build-3`
is not found, but `sphinx-build` is, then the above call will abort with an error,
and meson will never check for `sphinx-build`.

I think

   sphinx = find_program(['sphinx-build-3', 'sphinx-build'], required : get_option('documentation')

might work.


>   if not sphinx.found()
>       sphinx = find_program('sphinx-build', required : get_option('documentation'))
>   endif


Regards,
Barnabás Pőcze