mypy.yml

name: "mypy check"  # Name of the GitHub Actions workflow

on: [push, pull_request]  # Trigger the workflow

jobs:

  static-type-check:
    runs-on: ubuntu-latest  # Executes the job on the latest version of Ubuntu

    steps:
    - uses: actions/checkout@v2  # Checks out your repository's code
    - uses: actions/setup-python@v3  # Sets up Python for the job
      with:
        python-version: '3.x'  # Specifies Python version 3.x

    - run: pip install mypy  # Installs mypy for static type checking, you can specify a version here

    - name: Get Python changed files  # Identifies changed Python files
      id: changed-py-files
      uses: tj-actions/changed-files@v23
      with:
        files: |
          *.py
          **/*.py

    - name: Run if any of the listed files above is changed  # Runs mypy on changed files
      if: steps.changed-py-files.outputs.any_changed == 'true'  # Conditional execution if any Python files changed
      run: mypy ${{ steps.changed-py-files.outputs.all_changed_files }} --ignore-missing-imports