Jonathan Schwender 82df609833 mach: Use uv to manage the virtual environment (#41861) ...

Instead of attempting to manage the virtual environment ourselves, use
`uv` to manage the installation of dependencies.
Since we still have dependencies coming from upstream wpt, we use
`[tool.setuptool]` in our pyproject.toml to ensure that `uv` dynamically
installs our dependencies according to the requirements.txt files.

Additionally, this PR also reverts `--no-project` usage. `--no-project`
was added as a temporary workaround in
https://github.com/servo/servo/pull/37741.
It's not 100% clear to me what exactly the issue was, but
[apparently](https://github.com/servo/servo/pull/37741#pullrequestreview-2985666234)
the issue caused the build to break.
Removing the arg seems to work fine, except that we get a warning about
a missing `requiress-python` value in `pyproject.toml`.
Apparently it is good practice to specify the requirement as `>=` in th
pyroject, and lock the exact version via `uv pin` (which writes to
`.python_version`, where we already pin 3.11.


Testing: Should be covered by existing tests, which compile code on all
platforms.

---------

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

2026-01-22 05:51:44 +00:00

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