.github/workflows/mypy.yml

# Workflow to run mypy on select parts of the CPython repo
name: mypy

on:
  push:
    branches:
      - main
  pull_request:
    paths:
      - ".github/workflows/mypy.yml"
      - "Lib/_colorize.py"
      - "Lib/_pyrepl/**"
      - "Lib/test/libregrtest/**"
      - "Lib/tomllib/**"
      - "Misc/mypy/**"
      - "Tools/build/check_extension_modules.py"
      - "Tools/build/check_warnings.py"
      - "Tools/build/compute-changes.py"
      - "Tools/build/consts_getter.py"
      - "Tools/build/deepfreeze.py"
      - "Tools/build/generate-build-details.py"
      - "Tools/build/generate_levenshtein_examples.py"
      - "Tools/build/generate_sbom.py"
      - "Tools/build/generate_stdlib_module_names.py"
      - "Tools/build/mypy.ini"
      - "Tools/build/umarshal.py"
      - "Tools/build/update_file.py"
      - "Tools/build/verify_ensurepip_wheels.py"
      - "Tools/cases_generator/**"
      - "Tools/check-c-api-docs/**"
      - "Tools/clinic/**"
      - "Tools/jit/**"
      - "Tools/peg_generator/**"
      - "Tools/requirements-dev.txt"
  workflow_dispatch:

permissions:
  contents: read

env:
  PIP_DISABLE_PIP_VERSION_CHECK: 1
  FORCE_COLOR: 1
  TERM: xterm-256color  # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  mypy:
    name: Run mypy on ${{ matrix.target }}
    runs-on: ubuntu-latest
    timeout-minutes: 10
    strategy:
      fail-fast: false
      matrix:
        target: [
          "Lib/_pyrepl",
          "Lib/test/libregrtest",
          "Lib/tomllib",
          "Tools/build",
          "Tools/cases_generator",
          "Tools/check-c-api-docs",
          "Tools/clinic",
          "Tools/jit",
          "Tools/peg_generator",
        ]
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
        with:
          python-version: "3.15"
          activate-environment: true
          cache-dependency-glob: Tools/requirements-dev.txt
      - run: uv pip install -r Tools/requirements-dev.txt
      - run: python3 Misc/mypy/make_symlinks.py --symlink
      - run: mypy --num-workers 4 --config-file ${{ matrix.target }}/mypy.ini