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mach: adopt uv and avoid system python (#34632)

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This allows us to use `uv` for:
1. Installing a pinned Python version
2. Installing the dependency packages using `uv`'s pip compatible interface.
4. Bootstrapping `mach` without a Python installion on the host, using `uv
   run`

This change 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, #34547

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Mukilan Thiyagarajan 2024-12-16 14:50:37 +05:30 • committed by GitHub
parent f757fa46ac
commit 88a35b3cc9
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26 changed files with 131 additions and 153 deletions
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10
shell.nix
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@ -5,7 +5,7 @@
buildAndroid ? false
}:
with import (builtins.fetchTarball {
url = "https://github.com/NixOS/nixpkgs/archive/d04953086551086b44b6f3c6b7eeb26294f207da.tar.gz";
url = "https://github.com/NixOS/nixpkgs/archive/5d67ea6b4b63378b9c13be21e2ec9d1afc921713.tar.gz";
}) {
overlays = [
(import (builtins.fetchTarball {
@ -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