name: CI

on:
  push:
    branches:
      - main
      - 2.*
  pull_request: ~

env:
  CACHE_VERSION: 3
  KEY_PREFIX: venv
  DEFAULT_PYTHON: "3.11"
  PRE_COMMIT_CACHE: ~/.cache/pre-commit

jobs:
  base-checks:
    name: Checks
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - name: Check out code from GitHub
        uses: actions/checkout@v3.2.0
      - name: Set up Python ${{ env.DEFAULT_PYTHON }}
        id: python
        uses: actions/setup-python@v4.4.0
        with:
          python-version: ${{ env.DEFAULT_PYTHON }}
          check-latest: true
      - name: Generate partial Python venv restore key
        id: generate-python-key
        run: >-
          echo "key=base-venv-${{ env.CACHE_VERSION }}-${{
            hashFiles('pyproject.toml', 'requirements_test.txt',
          'requirements_test_min.txt', 'requirements_test_brain.txt',
          'requirements_test_pre_commit.txt') }}" >> $GITHUB_OUTPUT
      - name: Restore Python virtual environment
        id: cache-venv
        uses: actions/cache@v3.2.2
        with:
          path: venv
          key: >-
            ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
            steps.generate-python-key.outputs.key }}
      - name: Create Python virtual environment
        if: steps.cache-venv.outputs.cache-hit != 'true'
        run: |
          python -m venv venv
          . venv/bin/activate
          python -m pip install -U pip setuptools wheel
          pip install -U -r requirements_test.txt -r requirements_test_brain.txt
      - name: Generate pre-commit restore key
        id: generate-pre-commit-key
        run: >-
          echo "key=pre-commit-${{ env.CACHE_VERSION }}-${{
            hashFiles('.pre-commit-config.yaml') }}" >> $GITHUB_OUTPUT
      - name: Restore pre-commit environment
        id: cache-precommit
        uses: actions/cache@v3.2.2
        with:
          path: ${{ env.PRE_COMMIT_CACHE }}
          key: >-
            ${{ runner.os }}-${{ steps.generate-pre-commit-key.outputs.key }}
      - name: Install pre-commit dependencies
        if: steps.cache-precommit.outputs.cache-hit != 'true'
        run: |
          . venv/bin/activate
          pre-commit install --install-hooks
      - name: Run pre-commit checks
        run: |
          . venv/bin/activate
          pre-commit run pylint --all-files

  tests-linux:
    name: tests / run / ${{ matrix.python-version }} / Linux
    runs-on: ubuntu-latest
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
    outputs:
      python-key: ${{ steps.generate-python-key.outputs.key }}
    steps:
      - name: Check out code from GitHub
        uses: actions/checkout@v3.2.0
      - name: Set up Python ${{ matrix.python-version }}
        id: python
        uses: actions/setup-python@v4.4.0
        with:
          python-version: ${{ matrix.python-version }}
          check-latest: true
      - name: Install Qt
        if: ${{ matrix.python-version == '3.10' }}
        run: |
          sudo apt-get install build-essential libgl1-mesa-dev
      - name: Generate partial Python venv restore key
        id: generate-python-key
        run: >-
          echo "key=${{ env.KEY_PREFIX }}-${{ env.CACHE_VERSION }}-${{
            hashFiles('pyproject.toml', 'requirements_test.txt',
          'requirements_test_min.txt', 'requirements_test_brain.txt') }}" >>
          $GITHUB_OUTPUT
      - name: Restore Python virtual environment
        id: cache-venv
        uses: actions/cache@v3.2.2
        with:
          path: venv
          key: >-
            ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
            steps.generate-python-key.outputs.key }}
      - name: Create Python virtual environment
        if: steps.cache-venv.outputs.cache-hit != 'true'
        run: |
          python -m venv venv
          . venv/bin/activate
          python -m pip install -U pip setuptools wheel
          pip install -U -r requirements_test.txt -r requirements_test_brain.txt
          pip install -e .
      - name: Run pytest
        run: |
          . venv/bin/activate
          pytest --cov
      - name: Upload coverage artifact
        uses: actions/upload-artifact@v3.1.1
        with:
          name: coverage-linux-${{ matrix.python-version }}
          path: .coverage

  tests-windows:
    name: tests / run / ${{ matrix.python-version }} / Windows
    runs-on: windows-latest
    timeout-minutes: 20
    needs: tests-linux
    strategy:
      fail-fast: false
      matrix:
        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
    steps:
      - name: Set temp directory
        run: echo "TEMP=$env:USERPROFILE\AppData\Local\Temp" >> $env:GITHUB_ENV
        # Workaround to set correct temp directory on Windows
        # https://github.com/actions/virtual-environments/issues/712
      - name: Check out code from GitHub
        uses: actions/checkout@v3.2.0
      - name: Set up Python ${{ matrix.python-version }}
        id: python
        uses: actions/setup-python@v4.4.0
        with:
          python-version: ${{ matrix.python-version }}
          check-latest: true
      - name: Generate partial Python venv restore key
        id: generate-python-key
        run: >-
          echo "key=${{ env.KEY_PREFIX }}-${{ env.CACHE_VERSION }}-${{
            hashFiles('pyproject.toml', 'requirements_test_min.txt',
          'requirements_test_brain.txt') }}" >> $env:GITHUB_OUTPUT
      - name: Restore Python virtual environment
        id: cache-venv
        uses: actions/cache@v3.2.2
        with:
          path: venv
          key: >-
            ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
            steps.generate-python-key.outputs.key }}
      - name: Create Python virtual environment
        if: steps.cache-venv.outputs.cache-hit != 'true'
        run: |
          python -m venv venv
          . venv\\Scripts\\activate
          python -m pip install -U pip setuptools wheel
          pip install -U -r requirements_test_min.txt -r requirements_test_brain.txt
          pip install -e .
      - name: Run pytest
        run: |
          . venv\\Scripts\\activate
          pytest --cov
      - name: Upload coverage artifact
        uses: actions/upload-artifact@v3.1.1
        with:
          name: coverage-windows-${{ matrix.python-version }}
          path: .coverage

  tests-pypy:
    name: tests / run / ${{ matrix.python-version }} / Linux
    runs-on: ubuntu-latest
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        python-version: ["pypy3.7", "pypy3.8", "pypy3.9"]
    steps:
      - name: Check out code from GitHub
        uses: actions/checkout@v3.2.0
      - name: Set up Python ${{ matrix.python-version }}
        id: python
        uses: actions/setup-python@v4.4.0
        with:
          python-version: ${{ matrix.python-version }}
          check-latest: true
      - name: Generate partial Python venv restore key
        id: generate-python-key
        run: >-
          echo "key=${{ env.KEY_PREFIX }}-${{ env.CACHE_VERSION }}-${{
            hashFiles('pyproject.toml', 'requirements_test_min.txt')
          }}" >> $GITHUB_OUTPUT
      - name: Restore Python virtual environment
        id: cache-venv
        uses: actions/cache@v3.2.2
        with:
          path: venv
          key: >-
            ${{ runner.os }}-${{ matrix.python-version }}-${{
            steps.generate-python-key.outputs.key }}
      - name: Create Python virtual environment
        if: steps.cache-venv.outputs.cache-hit != 'true'
        run: |
          python -m venv venv
          . venv/bin/activate
          python -m pip install -U pip setuptools wheel
          pip install -U -r requirements_test_min.txt
          pip install -e .
      - name: Run pytest
        run: |
          . venv/bin/activate
          pytest --cov
      - name: Upload coverage artifact
        uses: actions/upload-artifact@v3.1.1
        with:
          name: coverage-pypy-${{ matrix.python-version }}
          path: .coverage

  coverage:
    name: tests / process / coverage
    runs-on: ubuntu-latest
    timeout-minutes: 10
    needs: ["tests-linux", "tests-windows", "tests-pypy"]
    steps:
      - name: Check out code from GitHub
        uses: actions/checkout@v3.2.0
      - name: Set up Python 3.11
        id: python
        uses: actions/setup-python@v4.4.0
        with:
          python-version: "3.11"
          check-latest: true
      - name: Install dependencies
        run: pip install -U -r requirements_test_min.txt
      - name: Download all coverage artifacts
        uses: actions/download-artifact@v3.0.1
      - name: Combine Linux coverage results
        run: |
          coverage combine coverage-linux*/.coverage
          coverage xml -o coverage-linux.xml
      - uses: codecov/codecov-action@v3
        with:
          fail_ci_if_error: true
          verbose: true
          flags: linux
          files: coverage-linux.xml
      - name: Combine Windows coverage results
        run: |
          coverage combine coverage-windows*/.coverage
          coverage xml -o coverage-windows.xml
      - uses: codecov/codecov-action@v3
        with:
          fail_ci_if_error: true
          verbose: true
          flags: windows
          files: coverage-windows.xml
      - name: Combine PyPy coverage results
        run: |
          coverage combine coverage-pypy*/.coverage
          coverage xml -o coverage-pypy.xml
      - uses: codecov/codecov-action@v3
        with:
          fail_ci_if_error: true
          verbose: true
          flags: pypy
          files: coverage-pypy.xml