ci.yaml

name: CI
# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency
# https://docs.github.com/en/developers/webhooks-and-events/events/github-event-types#pullrequestevent
concurrency:
  group: ${{ github.workflow }}-${{ github.event.number }}-${{ github.event.type }}
  cancel-in-progress: true

on: [push, pull_request]

env:
  CACHE_NUMBER: 0

jobs:
  lint:
    name: lint and style checks
    runs-on: ubuntu-latest
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install flake8 flake8-docstrings flake8-debugger flake8-bugbear pytest
      - name: Install Pylibtiff
        run: |
          pip install -e .
      - name: Run linting
        run: |
          flake8 libtiff/

  test:
    runs-on: ${{ matrix.os }}
    continue-on-error: ${{ matrix.experimental }}
    needs: [lint]
    strategy:
      fail-fast: true
      matrix:
        os: ["windows-latest", "ubuntu-latest", "macos-latest"]
        python-version: ["3.8", "3.9", "3.10"]
        experimental: [false]
        system-libtiff: [false]
        include:
          - python-version: "3.11"
            os: "ubuntu-latest"
            experimental: true
            system-libtiff: false
          - python-version: "3.10"
            os: "ubuntu-latest"
            experimental: false
            system-libtiff: true

    env:
      PYTHON_VERSION: ${{ matrix.python-version }}
      OS: ${{ matrix.os }}
      UNSTABLE: ${{ matrix.experimental }}
      ACTIONS_ALLOW_UNSECURE_COMMANDS: true

    steps:
      - name: Checkout source
        uses: actions/checkout@v4

      - name: Setup Conda Environment
        uses: conda-incubator/setup-miniconda@v3
        with:
          miniforge-variant: Mambaforge
          miniforge-version: latest
          use-mamba: true
          python-version: ${{ matrix.python-version }}
          activate-environment: pylibtiff

      - name: Set cache environment variables
        shell: bash -l {0}
        run: |
          echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV
          CONDA_PREFIX=$(python -c "import sys; print(sys.prefix)")
          echo "CONDA_PREFIX=$CONDA_PREFIX" >> $GITHUB_ENV

      - uses: actions/cache@v4
        with:
          path: ${{ env.CONDA_PREFIX }}
          key: ${{ matrix.os }}-${{matrix.python-version}}-conda-${{ hashFiles('.conda/environment.yml') }}-${{ env.DATE }}-${{matrix.experimental}}-${{ env.CACHE_NUMBER }}
        id: cache

      - name: Update environment
        run: mamba env update -n pylibtiff -f .conda/environment.yml
        if: steps.cache.outputs.cache-hit != 'true'

      - name: Install unstable dependencies
        if: matrix.experimental == true
        shell: bash -l {0}
        # We must get LD_PRELOAD for stdlibc++ or else the manylinux wheels
        # may break the conda-forge libraries trying to use newer glibc versions
        run: |
          python -m pip install \
          --index-url https://pypi.anaconda.org/scipy-wheels-nightly/simple/ \
          --trusted-host pypi.anaconda.org \
          --no-deps --pre --upgrade \
          numpy;
          LD_PRELOAD=$(python -c "import sys; print(sys.prefix)")/lib/libstdc++.so
          echo "LD_PRELOAD=${LD_PRELOAD}" >> $GITHUB_ENV

      - name: Install system libtiff
        if: matrix.system-libtiff == true
        shell: bash -l {0}
        run: sudo apt-get install -y libtiff-dev

      - name: Install conda libtiff
        if: matrix.system-libtiff == false
        shell: bash -l {0}
        run: conda install -y libtiff

      - name: Install pylibtiff
        shell: bash -l {0}
        run: |
          python -m pip install --no-deps -e .

      - name: Run unit tests
        shell: bash -l {0}
        run: |
          export LD_PRELOAD=${{ env.LD_PRELOAD }};
          pytest --cov=libtiff libtiff/tests

      - name: Coveralls Parallel
        uses: AndreMiras/coveralls-python-action@develop
        with:
          flag-name: run-${{ matrix.test_number }}
          parallel: true
        if: runner.os == 'Linux'

  coveralls:
    needs: [test]
    runs-on: ubuntu-latest
    steps:
      - name: Coveralls Finished
        uses: AndreMiras/coveralls-python-action@develop
        with:
          parallel-finished: true