release.yml

name: Release
on:
  push:
    branches:
      - main
      - v[0-9]+.[0-9]+.[0-9]+*
  release:
    types:
      - published
jobs:
  prep:
    name: Prepare release
    runs-on: ubuntu-latest
    if: ${{ github.event_name == 'push' && github.ref_name != 'main' }}
    permissions:
      contents: write
      pull-requests: write
    defaults:
      run:
        shell: bash
    steps:

      - name: Checkout release branch
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.8
          cache: 'pip'
          cache-dependency-path: pyproject.toml

      - name: Install Python dependencies
        run: |
          pip install --upgrade pip
          pip install build twine
          pip install .
          pip install ".[lint, test]"

      - name: Update version
        id: version
        run: |
          ref="${{ github.ref_name }}"
          version="${ref#"v"}"
          python scripts/update_version.py -v "$version"
          python scripts/lint.py
          python -c "import modflow_devtools; print('Version: ', modflow_devtools.__version__)"
          echo "version=$version" >> $GITHUB_OUTPUT

      - name: Touch changelog
        run: touch HISTORY.md

      - name: Generate changelog
        id: cliff
        uses: orhun/git-cliff-action@v1
        with:
          config: cliff.toml
          args: --verbose --unreleased --tag ${{ steps.version.outputs.version }}
        env:
          OUTPUT: CHANGELOG.md

      - name: Update changelog
        id: update-changelog
        run: |
          # move changelog
          clog="CHANGELOG_${{ steps.version.outputs.version }}.md"
          echo "changelog=$clog" >> $GITHUB_OUTPUT
          sudo cp "${{ steps.cliff.outputs.changelog }}" "$clog"
          
          # show current release changelog
          cat "$clog"
          
          # substitute full group names
          sed -i 's/#### Ci/#### Continuous integration/' "$clog"
          sed -i 's/#### Feat/#### New features/' "$clog"
          sed -i 's/#### Fix/#### Bug fixes/' "$clog"
          sed -i 's/#### Refactor/#### Refactoring/' "$clog"
          sed -i 's/#### Test/#### Testing/' "$clog"
          
          cat "$clog" HISTORY.md > temp_history.md
          sudo mv temp_history.md HISTORY.md
          
          # show full changelog
          cat HISTORY.md

      - name: Upload changelog
        uses: actions/upload-artifact@v3
        with:
          name: changelog
          path: ${{ steps.update-changelog.outputs.changelog }}

      - name: Push release branch
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: |
          ver="${{ steps.version.outputs.version }}"
          changelog=$(cat ${{ steps.update-changelog.outputs.changelog }} | grep -v "### Version $ver")
          
          # remove this release's changelog so we don't commit it
          # the changes have already been prepended to HISTORY.md
          rm ${{ steps.update-changelog.outputs.changelog }}
          rm -f CHANGELOG.md
          
          # commit and push changes
          git config core.sharedRepository true
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add -A
          git commit -m "ci(release): set version to ${{ steps.version.outputs.version }}, update changelog"
          git push origin "${{ github.ref_name }}"

          title="Release $ver"
          body='
          # Release '$ver'
          
          The release can be approved by merging this pull request into `main`. This will trigger jobs to publish the release to PyPI and reset `develop` from `main`, incrementing the patch version number.
          
          ## Changelog
          
          '$changelog'
          '
          gh pr create -B "main" -H "${{ github.ref_name }}" --title "$title" --draft --body "$body"

  release:
    name: Draft release
    # runs only when changes are merged to main
    if: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:

      - name: Checkout repo
        uses: actions/checkout@v3
        with:
          ref: main

      # actions/download-artifact won't look at previous workflow runs but we need to in order to get changelog
      - name: Download artifacts
        uses: dawidd6/action-download-artifact@v2

      - name: Draft release
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: |
          version=$(cat version.txt)
          title="MODFLOW developer tools $version"
          notes=$(cat "changelog/CHANGELOG_$version.md" | grep -v "### Version $version")
          gh release create "$version" \
            --target main \
            --title "$title" \
            --notes "$notes" \
            --draft \
            --latest

  publish:
    name: Publish package
    # runs only after release is published (manually promoted from draft)
    if: ${{ github.event_name == 'release' }}
    runs-on: ubuntu-22.04
    permissions:
      contents: write
      pull-requests: write
      id-token: write  # mandatory for trusted publishing
    environment:  # requires a 'release' environment in repo settings
      name: release
      url: https://pypi.org/p/modflow-devtools
    steps:

      - name: Checkout main branch
        uses: actions/checkout@v3
        with:
          ref: main

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.8

      - name: Install Python dependencies
        run: |
          pip install --upgrade pip
          pip install build twine
          pip install .

      - name: Build package
        run: python -m build
      
      - name: Check package
        run: twine check --strict dist/*

      - name: Upload package
        uses: actions/upload-artifact@v3
        with:
          name: dist
          path: dist

      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1

  reset:
    name: Draft reset PR
    if: ${{ github.event_name == 'release' }}
    runs-on: ubuntu-22.04
    permissions:
      contents: write
      pull-requests: write
    steps:

      - name: Checkout main branch
        uses: actions/checkout@v3
        with:
          ref: main

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.8
          cache: 'pip'
          cache-dependency-path: pyproject.toml

      - name: Install Python dependencies
        run: |
          pip install --upgrade pip
          pip install .
          pip install ".[lint, test]"

      - name: Get release tag
        uses: oprypin/find-latest-tag@v1
        id: latest_tag
        with:
          repository: ${{ github.repository }}
          releases-only: true

      - name: Draft pull request
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: |
          # create reset branch from main
          reset_branch="post-release-${{ steps.latest_tag.outputs.tag }}-reset"
          git switch -c $reset_branch

          # increment minor version
          major_version=$(echo "${{ steps.latest_tag.outputs.tag }}" | cut -d. -f1)
          minor_version=$(echo "${{ steps.latest_tag.outputs.tag }}" | cut -d. -f2)
          version="$major_version.$((minor_version + 1)).0.dev0"
          python scripts/update_version.py -v "$version"
          python scripts/lint.py

          # commit and push reset branch
          git config core.sharedRepository true
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add -A
          git commit -m "ci(release): update to development version $version"
          git push -u origin $reset_branch

          # create PR into develop
          body='
          # Reinitialize for development

          Updates the `develop` branch from `main` following a successful release. Increments the patch version number.
          '
          gh pr create -B "develop" -H "$reset_branch" --title "Reinitialize develop branch" --draft --body "$body"