mypy.yml

name: Type annotation

on:
  pull_request:
    paths:
      - 'datalad_next/**.py'
      - '!**/tests/**.py'

jobs:
  static-type-check:
    runs-on: ubuntu-latest
    steps:
      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.11
          architecture: x64
      - name: Checkout
        uses: actions/checkout@v3
      - name: Install mypy
        run: python -m pip install mypy  # you can pin your preferred version
      - name: Get Python changed files
        id: changed-py-files
        uses: tj-actions/changed-files@v23
        with:
          files: |
            *.py
            **/*.py
      - name: Type check changed files
        if: steps.changed-py-files.outputs.any_changed == 'true'
        run: |
          # get any type stubs that mypy thinks it needs
          mypy --install-types --non-interactive --follow-imports skip --ignore-missing-imports ${{ steps.changed-py-files.outputs.all_changed_files }}
          # run mypy on the modified files only, and do not even follow imports.
          # this results is a fairly superficial test, but given the overall
          # state of annotations, we strive to become more correct incrementally
          # with focused error reports, rather than barfing a huge complaint
          # that is unrelated to the changeset someone has been working on
          mypy --follow-imports skip --ignore-missing-imports --pretty --show-error-context ${{ steps.changed-py-files.outputs.all_changed_files }}