python3Packages.ruff: reuse already built ruff binary (#412112)

{

  buildPythonPackage,

  hatchling,

  lib,

  ruff,

  rustPlatform,

  installShellFiles,

}:

buildPythonPackage {

    pname

    version

    src

    cargoDeps

    postInstall

    meta

    ;

  pyproject = true;

  build-system = [ hatchling ];

  # Do not rely on path lookup at runtime to find the ruff binary

  postPatch = ''

  postPatch =

    # Do not rely on path lookup at runtime to find the ruff binary.

    # Use the propagated binary instead.

    ''

      substituteInPlace python/ruff/__main__.py \

        --replace-fail \

          'ruff_exe = "ruff" + sysconfig.get_config_var("EXE")' \

        'return "${placeholder "out"}/bin/ruff"'

  '';

          'return "${lib.getExe ruff}"'

    ''

    # Sidestep the maturin build system in favour of reusing the binary already built by nixpkgs,

    # to avoid rebuilding the ruff binary for every active python package set.

    + ''

      substituteInPlace pyproject.toml \

        --replace-fail 'requires = ["maturin>=1.0,<2.0"]' 'requires = ["hatchling"]' \

        --replace-fail 'build-backend = "maturin"' 'build-backend = "hatchling.build"'

  pyproject = true;

      cat >> pyproject.toml <<EOF

      [tool.hatch.build]

      packages = ['python/ruff']

  nativeBuildInputs = [

    installShellFiles

    rustPlatform.cargoSetupHook

    rustPlatform.maturinBuildHook

  ];

      EOF

    '';

  postInstall = ''

    mkdir -p $out/bin && ln -s ${lib.getExe ruff} $out/bin/ruff

  '';

  pythonImportsCheck = [ "ruff" ];

}