upgrade-dependencies.yml

# https://www.oddbird.net/2022/06/01/dependabot-single-pull-request/
name: upgrade dependencies

on:
  workflow_dispatch: # Allow running on-demand
  schedule:
    # Runs every Monday at 8:00 UTC (4:00 Eastern)
    - cron: '0 8 * * 1'

jobs:
  upgrade:
    name: ${{ matrix.package }} (${{ matrix.os }}/py${{ matrix.python-version }})
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: ['windows-latest', 'ubuntu-latest', 'macos-latest']
        package: ["emmet-core", "emmet-builders", "emmet-api"]
        python-version: ["3.8", "3.9", "3.10"]
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
        with:
          python-version: ${{ matrix.python-version }}
      - name: Upgrade Python dependencies
        run: |
          pip install -U pip pip-tools
          cd ${{ matrix.package }}
          pip-compile -q --upgrade -o requirements/${{ matrix.os }}_py${{ matrix.python-version }}.txt
          pip-compile -q --upgrade --all-extras -o requirements/${{ matrix.os }}_py${{ matrix.python-version }}_extras.txt
      - name: Detect changes
        id: changes
        run: |
          echo "count=$(git diff-index HEAD | wc -l | xargs)" >> $GITHUB_OUTPUT
          echo "files=$(git ls-files --exclude-standard --others | wc -l | xargs)" >> $GITHUB_OUTPUT
      - name: commit & push changes
        if: steps.changes.outputs.count > 0 || steps.changes.outputs.files > 0
        run: |
          git config user.name github-actions
          git config user.email github-actions@github.com
          git add ${{ matrix.package }}/requirements
          git commit -m "update dependencies for ${{ matrix.package }} (${{ matrix.os }}/py${{ matrix.python-version }})"
          git push -f origin ${{ github.ref_name }}:auto-dependency-upgrades-${{ matrix.package }}-${{ matrix.os }}-py${{ matrix.python-version }}

    pull_request:
      name: Merge all branches and open PR
      runs-on: ubuntu-latest
      needs: upgrade
      steps:
        - uses: actions/checkout@v3
        - name: detect auto-upgrade-dependency branches
          id: changes
          run: echo "count=$(git branch -r | grep auto-dependency-upgrades- | wc -l | xargs)" >> $GITHUB_OUTPUT
        - name: merge all auto-dependency-upgrades branches
          if: steps.changes.outputs.count > 0
          run:
            git checkout -b auto-dependency-upgrades
            git branch -r | grep auto-dependency-upgrades- | xargs -I {} git merge {}
            git rebase main
            git push -f origin auto-dependency-upgrades
            git branch -r | grep auto-dependency-upgrades- | cut -d/ -f2 | xargs -I {} git push origin :{}
        - name: Open pull request if needed
          if: steps.changes.outputs.count > 0
          env:
            GITHUB_TOKEN: ${{ secrets.PAT }}
          # Only open a PR if the branch is not attached to an existing one
          run: |
            PR=$(gh pr list --head auto-dependency-upgrades --json number -q '.[0].number')
            if [ -z $PR ]; then
              gh pr create \
              --head auto-dependency-upgrades \
              --title "Automated dependency upgrades" \
              --body "Full log: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
            else
              echo "Pull request already exists, won't create a new one."
            fi