.github/workflows/update-cddl.yml

name: Scheduled - Update CDDL

on:
  schedule:
    - cron: 20 0 * * *
  workflow_dispatch:

permissions:
  contents: read

jobs:
  update:
    name: Update CDDL Specs
    uses: ./.github/workflows/bazel.yml
    with:
      name: Update CDDL Specs
      run: ./go update_cddl
      artifact-name: cddl-updates

  create-pr:
    name: Create Pull Request
    if: github.event.repository.fork == false
    runs-on: ubuntu-latest
    needs: update
    permissions:
      contents: write
      pull-requests: write
      actions: read
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          persist-credentials: false
      - name: Download patch
        uses: actions/download-artifact@v8
        with:
          pattern: cddl-updates
          merge-multiple: true
      - name: Apply patch
        id: apply
        run: |
          if [ -s changes.patch ]; then
            git apply --index changes.patch
            if git diff --cached --quiet -- common/bidi/schema.json; then
              echo "Projected BiDi schema unchanged; not opening a PR"
            else
              echo "changed=true" >> "$GITHUB_OUTPUT"
            fi
          fi
          rm -f changes.patch
      - name: Create Pull Request
        if: steps.apply.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v8
        with:
          token: ${{ secrets.SELENIUM_CI_TOKEN }}
          commit-message: "update cddl spec files"
          author: Selenium CI Bot <selenium-ci@users.noreply.github.com>
          base: trunk
          title: "[build] Automated CDDL Spec Update"
          body: |
            This is an automated pull request to repin the CDDL grammars and definition
            indexes from w3c/webref, plus the rendered WebDriver BiDi spec from
            w3c/webdriver-bidi.

            Auto-generated by the [update-cddl workflow](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
          branch: automated-cddl-updates
          labels: C-build

  on-failure:
    name: On CDDL Update Failure
    runs-on: ubuntu-latest
    needs: [update, create-pr]
    if: failure() || cancelled()
    steps:
      - name: Slack Notification
        uses: rtCamp/action-slack-notify@v2
        env:
          SLACK_ICON_EMOJI: ":rotating_light:"
          SLACK_COLOR: failure
          SLACK_CHANNEL: selenium-tlc
          SLACK_USERNAME: GitHub Workflows
          SLACK_TITLE: Needs Investigation
          SLACK_MESSAGE: "Unable to create the daily CDDL Update PR"
          MSG_MINIMAL: actions url
          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}