On Tue, 30 Jul 2024 at 15:50, Paolo Bonzini <pbonz...@redhat.com> wrote:
>
> On Mon, Jul 29, 2024 at 2:26 PM Peter Maydell <peter.mayd...@linaro.org>
> wrote:
> >
> > Currently we have "sphinx" and "sphinx_rtd_theme" in a single
> > group in pythondeps.toml. This means that mkvenv will try to
> > install them both at once, which doesn't work if sphinx_rtd_theme
> > depends on a version of Sphinx which is newer than the system
> > one, even if the "sphinx" we're installing at the same time
> > would satisfy that dependency. For instance this:
> >
> > sphinx = { accepted = ">=8.0.0rc1", installed = "8.0.0rc1", canary =
> > "sphinx-build" }
> > sphinx_rtd_theme = { accepted = ">=2.1.0rc1", installed = "2.1.0rc1" }
> >
> > fails like this:
> >
> > mkvenv: Creating non-isolated virtual environment at 'pyvenv'
> > mkvenv: checking for meson>=1.1.0
> > mkvenv: installing meson==1.2.3
> > mkvenv: checking for sphinx>=8.0.0rc1
> > mkvenv: checking for sphinx_rtd_theme>=2.1.0rc1
> > mkvenv: installing sphinx==8.0.0rc1, sphinx_rtd_theme==2.1.0rc1
> > ERROR: Cannot install sphinx-rtd-theme==2.1.0rc1 and sphinx==8.0.0rc1
> > because these package versions have conflicting dependencies.
> > ERROR: ResolutionImpossible: for help visit
> > https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
> >
> > *** Ouch! ***
> >
> > Could not provide build dependency 'sphinx==8.0.0rc1':
> > • Python package 'sphinx' version '4.3.2' was found, but isn't suitable.
> > • A suitable version could not be obtained from PyPI.
> >
> > (where 4.3.2 is the system version of sphinx on my system).
>
> I think the error is a bit confusing, but the versions seem to be
> genuinely incompatibile. sphinx_rtd_theme is still incompatible with
> sphinx 8.0.0, and the error is correct:
>
> =========
> $ python -m venv testvenv
> $ cd testvenv
> $ pip install 'sphinx==8.0.0rc1' 'sphinx_rtd_theme==2.1.0rc1'
> Defaulting to user installation because normal site-packages is not writeable
> Collecting sphinx==8.0.0rc1
> Downloading sphinx-8.0.0rc1-py3-none-any.whl.metadata (6.2 kB)
> Collecting sphinx_rtd_theme==2.1.0rc1
> Downloading sphinx_rtd_theme-2.1.0rc1-py2.py3-none-any.whl.metadata (4.4 kB)
> Collecting sphinxcontrib-applehelp (from sphinx==8.0.0rc1)
> Downloading sphinxcontrib_applehelp-2.0.0-py3-none-any.whl.metadata (2.3 kB)
> Requirement already satisfied: sphinxcontrib-devhelp in
> /usr/lib/python3.12/site-packages (from sphinx==8.0.0rc1) (1.0.5)
> [more "requirement already satisfied" lines...]
> Requirement already satisfied: packaging>=23.0 in
> /usr/lib/python3.12/site-packages (from sphinx==8.0.0rc1) (23.2)
> INFO: pip is looking at multiple versions of sphinx-rtd-theme to
> determine which version is compatible with other requirements. This
> could take a while.
> ERROR: Cannot install sphinx-rtd-theme==2.1.0rc1 and sphinx==8.0.0rc1
> because these package versions have conflicting dependencies.
>
> The conflict is caused by:
> The user requested sphinx==8.0.0rc1
> sphinx-rtd-theme 2.1.0rc1 depends on sphinx<8 and >=5
> To fix this you could try to:
> 1. loosen the range of package versions you've specified
> 2. remove package versions to allow pip attempt to solve the dependency
> conflict
>
> ERROR: ResolutionImpossible: for help visit
> https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
> =========
>
> The reason why your patch works is weird, and it's apparent when you
> run the "pip install" commands one by one:
>
> =========
> $ pip install 'sphinx_rtd_theme==2.1.0rc1'
> Defaulting to user installation because normal site-packages is not writeable
> Collecting sphinx_rtd_theme==2.1.0rc1
> Using cached sphinx_rtd_theme-2.1.0rc1-py2.py3-none-any.whl.metadata (4.4
> kB)
> Collecting sphinx<8,>=5 (from sphinx_rtd_theme==2.1.0rc1)
> Downloading sphinx-7.4.7-py3-none-any.whl.metadata (6.1 kB)
> Requirement already satisfied: docutils<0.21 in
> /usr/lib/python3.12/site-packages (from sphinx_rtd_theme==2.1.0rc1)
> (0.20.1)
> [more "requirement already satisfied" lines...]
> Downloading sphinx_rtd_theme-2.1.0rc1-py2.py3-none-any.whl (7.7 MB)
> Downloading sphinx-7.4.7-py3-none-any.whl (3.4 MB)
> Installing collected packages: sphinx, sphinx_rtd_theme
> Attempting uninstall: sphinx
> Found existing installation: Sphinx 8.0.0rc1
> Uninstalling Sphinx-8.0.0rc1:
> Successfully uninstalled Sphinx-8.0.0rc1
> Successfully installed sphinx-7.4.7 sphinx_rtd_theme-2.1.0rc1
> =========
>
> It doesn't install 8.0.0rc1 at all... :)
Aha. Is it possible to get mkvenv to produce these full
error messages rather than the truncated version?
thanks
-- PMM
