ci.yml

# This workflow will install Python dependencies and run tests on
# windows and linux systems with a variety of Python versions

# For more information see:
# https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: CI/CD

on:
  push:
  pull_request:
  workflow_dispatch:
  schedule: # only upstream, won't trigger on forks!
    - cron: '0 0 * * *' # daily
jobs:

  build:
    strategy:
      matrix:
        # as we build C extension for users to download, we want to include as many python versions
        # and OS versions as possible (especially windows to create .whl packages,
        # see step "Create wheel and dist package")
        python-version: ['3.9', '3.10', '3.11', '3.12']
        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
    name: py${{ matrix.python-version }}@${{ matrix.os }}
    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: true
          fetch-depth: 0
      - uses: conda-incubator/setup-miniconda@v3
        with:
           miniconda-version: "latest"
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
           environment-file: environment.yml
           activate-environment: pytesmo
           channel-priority: flexible
           auto-activate-base: false
      - name: Print Infos
        run: |
          git status
          conda info -a
          conda list
          pip list
          which pip
          which python
          gcc -v
      - name: Export Environment
        shell: bash -l {0}
        run: |
          mkdir -p artifacts
          filename=env_py${{ matrix.python-version }}_${{ matrix.os }}.yml
          conda env export --no-builds | grep -v "prefix" > artifacts/$filename
      - name: Install package and dependencies
        shell: bash -l {0}
        run: |
          pip install -e .[testing]
      - name: Run unit tests
        shell: bash -l {0}
        run: |
          pytest
      - name: Upload Coverage
        shell: bash -l {0}
        run: |
          pip install coveralls && coveralls --service=github-actions
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          COVERALLS_FLAG_NAME: ${{ matrix.python-version }}
          COVERALLS_PARALLEL: true
      - name: Build dist and whl packages
        shell: bash -l {0}
        run: |
          # Remove dots from Python version for use with cibuildwheel
          PY="${{ matrix.python-version }}"; PY="${PY//./}"
          # Get current OS on cibuildwheel compatible form
          if [ "${{ runner.os }}" == "Linux" ]; then
            OS="manylinux"
          elif [ "${{ runner.os }}" == "macOS" ]; then
            OS="macosx"
          elif [ "${{ runner.os }}" == "Windows" ]; then
            OS="win"
          fi
          
          pip install setuptools_scm twine cibuildwheel
          python setup.py sdist --dist-dir artifacts/dist_whl
          export CIBW_BUILD="cp${PY}-${OS}*"
          cibuildwheel --output-dir artifacts/dist_whl
          twine check artifacts/dist_whl/*
      - name: Upload Artifacts
        uses: actions/upload-artifact@v4
        with:
          name: Artifacts-${{ matrix.python-version }}-${{ matrix.os }}
          path: artifacts/*

  wrapup:
    name: Wrap-Up Builds
    needs: build
    runs-on: ubuntu-latest
    container: python:3-slim
    steps:
      # Merge artifacts from multiple builds
      - name: Merge Uploaded Artifacts
        uses: actions/upload-artifact/merge@v4
        with:
          name: Artifacts
          delete-merged: true
      # Send the coverage reports to Coveralls.io
      - name: Finish Coverage
        run: |
          pip3 install --upgrade coveralls && coveralls --service=github-actions --finish
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  publish:
    # Upload the dist and whl packages from artifacts to pypi
    name: Upload to PyPI
    if: |
      startsWith(github.ref, 'refs/tags/v') &&
      startsWith(github.repository, 'TUW-GEO')
    needs: wrapup
    runs-on: ubuntu-latest
    steps:
      - name: Print environment variables
        run: |
          echo "GITHUB_REF = $GITHUB_REF"
          echo "GITHUB_REPOSITORY = $GITHUB_REPOSITORY"
      - name: Download Artifacts
        uses: actions/download-artifact@v4
        with:
          path: Artifacts
          pattern: Artifacts*
          merge-multiple: true
      - name: Display downloaded files
        run: ls -aR
      - name: Upload to PyPI
        uses: pypa/gh-action-pypi-publish@v1.4.1
        with:
          skip_existing: true
          verbose: true
          verify_metadata: true
          packages_dir: Artifacts/dist_whl/
          user: __token__
          # token needs to be uploaded to github actions secrets
          password: ${{ secrets.PYPI_API_TOKEN }}