continuous_integration.yml

name: Continuous Integration

on:
  workflow_dispatch:
  workflow_call:
  pull_request:
    types: [opened, reopened, synchronize, ready_for_review]
    branches:
      - main

env:
  PYTHON_VERSION: 3.9

jobs:
  changes:
    name: Check for Python file changes
    runs-on: ubuntu-latest
    if: ${{ !github.event.pull_request.draft }}
    outputs:
      python: ${{steps.filter.outputs.python}}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          filters: |
            python:
              - '**/*.py'
              - 'pyproject.toml'
              - 'poetry.lock'
              - '.github/workflows/continuous_integration.yml'
              - '.mypy.ini'
              - '.flake8'

  typecheck:
    name: Type check Python
    needs: [changes]
    if: ${{needs.changes.outputs.python == 'true' && !github.event.pull_request.draft }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout the repository
        uses: actions/checkout@v4

      - name: Setup reviewdog
        uses: reviewdog/action-setup@v1

      - name: Install Poetry
        run: pipx install poetry

      - name: Set up Python ${{ env.PYTHON_VERSION }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          cache: "poetry"

      - name: Install dependencies
        run: poetry install

      - name: Load mypy cache
        uses: actions/cache@v3
        id: mypy-cache
        with:
          path: .mypy_cache
          key: ${{ runner.os }}-mypy-cache-${{ hashFiles('poetry.lock') }}-${{hashFiles('pyproject.toml') }}
          restore-keys: |
            ${{ runner.os }}-mypy-cache-${{ hashFiles('poetry.lock') }}-${{hashFiles('pyproject.toml') }}
            ${{ runner.os }}-mypy-cache-

      - name: Run mypy with reviewdog
        env:
          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_EVENT_NAME: ${{ github.event_name }}
        run: |
          exit_val="0"
          [[ $GITHUB_EVENT_NAME == "pull_request" ]] && reporter="github-pr-review" || reporter="github-check"
          poetry run mypy \
            --show-column-numbers \
            --show-absolute-path \
            --no-error-summary . 2>&1 | reviewdog \
            -efm="%f:%l:%c: %t%*[^:]: %m" \
            -name="mypy" \
            -filter-mode=nofilter \
            -fail-on-error \
            -reporter="${reporter}" || exit_val="$?"
          if [[ "${exit_val}" -ne '0' ]]; then
            exit 1
          fi

  lint:
    name: Lint Python
    needs: [changes]
    if: ${{needs.changes.outputs.python == 'true' && !github.event.pull_request.draft }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup reviewdog
        uses: reviewdog/action-setup@v1

      - name: Install Poetry
        run: pipx install poetry

      - name: Set up Python ${{ env.PYTHON_VERSION }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          cache: "poetry"

      - name: Install dependencies
        run: poetry install

      - name: Run flake8
        env:
          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_EVENT_NAME: ${{ github.event_name }}
        run: |
          exit_val="0"
          [[ $GITHUB_EVENT_NAME == "pull_request" ]] && reporter="github-pr-review" || reporter="github-check"
          poetry run flake8 \
            --format=default . 2>&1 | reviewdog \
            -f=pep8 \
            -name="flake8" \
            -fail-on-error \
            -filter-mode=file \
            -reporter="${reporter}" || exit_val="$?"
          if [[ "${exit_val}" -ne '0' ]]; then
            exit 1
          fi

  format:
    name: Format
    runs-on: ubuntu-latest
    if: ${{ !github.event.pull_request.draft }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up Python ${{ env.PYTHON_VERSION }}
        uses: actions/setup-python@v4
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          cache: "pip"

      - name: Install pre-commit
        run: |
          pip install pre-commit

      - name: Load cached pre-commit environment
        uses: actions/cache@v3
        id: pre-commit-cache
        with:
          path: ~/.cache/pre-commit
          key: ${{ runner.os }}-pre-commit-${{ hashFiles('**/.pre-commit-config.yaml') }}
          restore-keys: |
            ${{ runner.os }}-pre-commit-

      - name: Run pre-commit hook
        id: run-pre-commit-hooks
        run: |
          git add .pre-commit-config.yaml
          pre-commit run --color=always --all-files

      - name: Annotate any changes using reviewdog
        if: ${{ failure() }}
        id: reviewdog-suggester
        uses: reviewdog/action-suggester@v1
        with:
          tool_name: pre-commit