On Tue, Feb 21, 2023, 1:50 AM Markus Armbruster <arm...@redhat.com> wrote:

> John Snow <js...@redhat.com> writes:
>
> > Once upon a time, "sphinx-build" on certain RPM platforms invoked
> > specifically a Python 2.x version, while "sphinx-build-3" was a distro
> > shim for the Python 3.x version.
> >
> > These days, none of our supported platforms utilize a 2.x version, so it
> > should be safe to search for 'sphinx-build' prior to 'sphinx-build-3',
> > which will prefer pip/venv installed versions of sphinx if they're
> > available.
> >
> > This adds an extremely convenient ability to test document building
> > ability in QEMU across multiple versions of Sphinx for the purposes of
> > compatibility testing.
> >
> > Signed-off-by: John Snow <js...@redhat.com>
> > ---
> >  docs/meson.build | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/docs/meson.build b/docs/meson.build
> > index 9136fed3b73..906034f9a87 100644
> > --- a/docs/meson.build
> > +++ b/docs/meson.build
> > @@ -1,5 +1,5 @@
> >  if get_option('sphinx_build') == ''
> > -  sphinx_build = find_program(['sphinx-build-3', 'sphinx-build'],
> > +  sphinx_build = find_program(['sphinx-build', 'sphinx-build-3'],
> >                                required: get_option('docs'))
> >  else
> >    sphinx_build = find_program(get_option('sphinx_build'),
>
> Do we still need to check for sphinx-build-3?  Or asked differently, is
> there any supported build host that provides only sphinx-build-3?
>

Yes, modern Fedora still uses "sphinx-build-3" as the name in /usr/bin for
the rpm-packaged version of sphinx.

It's just that the only platforms where "sphinx-build" is the 2.x version
are platforms on which we want to drop 3.6 support anyway, so it's OK to
invert the search priority in the context of this series.

(All pip/pypi versions use "sphinx-build" as the binary name. In effect,
this patch means we prefer pip/pypi versions if they're in your $PATH.)


>

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