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mach: switch to uv for managing python venv (#34504)

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This patch switches servo to use `uv` for both installing a pinned
Python version as well as installing the dependency packages using
`uv`'s pip compatible interface. It also introduces a new 'composite'
GitHub action to setup python in the different CI workflows.

There is no support for externally managed python installations and
virtual environments. These could be added in the future.

Fixes #34095

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Mukilan Thiyagarajan 2024-12-09 20:22:06 +05:30 • committed by GitHub
parent a0743f60b3
commit 4103421ba5
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22 changed files with 100 additions and 80 deletions
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shell.nix
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@ -84,7 +84,13 @@ stdenv.mkDerivation (androidEnvironment // {
# Build utilities
cmake dbus gcc git pkg-config which llvm perl yasm m4
(python3.withPackages (ps: with ps; [virtualenv pip dbus]))
# Ensure the Python version is same as the one in `.python-version` file so
# that `uv` will just symlink to the one in nix store. Otherwise `uv` will
# download a pre-built binary that won't work on nix.
# FIXME: dbus python module needs to be installed into the virtual environment.
python312
uv
# This pins gnumake to 4.3 since 4.4 breaks jobserver
# functionality in mozjs and causes builds to be extremely