python-typecheck.yml

name: Python Type Check

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

on:
  pull_request:
  push:
    branches:
      - dev

jobs:
  typecheck:
    name: mypy --strict (baseline)
    runs-on: ubuntu-latest
    timeout-minutes: 10

    steps:
      - uses: actions/checkout@v3

      - name: Setup Python
        uses: actions/setup-python@v3
        with:
          python-version: '3.10'

      - name: Cache pip
        uses: actions/cache@v3
        with:
          path: ~/.cache/pip
          key: typecheck-${{ runner.os }}-${{ hashFiles('requirements-dev.txt') }}
          restore-keys: typecheck-${{ runner.os }}-

      - name: Install type-check dependencies
        run: pip install -r requirements-dev.txt

      - name: Run mypy with baseline filter
        # Fails if any *new* violations are introduced beyond the frozen baseline.
        # To update the baseline after fixing violations, run locally:
        #   python -m mypy -p aaz_dev | python -m mypy_baseline sync
        # and commit the updated mypy-baseline.txt.
        run: python -m mypy -p aaz_dev | python -m mypy_baseline filter