pr-visual-snapshot-update-bot.yml

name: PR Visual Snapshot Update Bot
on:
  workflow_run:
    workflows: [PR Build]
jobs:
  pr-visual-snapshot-update-bot:
    if: ${{github.event.workflow_run.conclusion == 'success'}}
    runs-on: ubuntu-latest
    steps:
      - uses: haya14busa/action-workflow_run-status@v1
      - name: Checkout
        uses: actions/checkout@v3
        with:
          repo: ${{github.event.workflow_run.head_repository.full_name}}
          ref: ${{github.event.workflow_run.head_sha}}
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version-file: '.nvmrc'
      - name: Install Dependencies
        run: npm ci
      - name: Get PR Event
        id: get-pr-event
        uses: potiuk/get-workflow-origin@v1_5
        with:
          token: ${{secrets.GITHUB_TOKEN}}
          sourceRunId: ${{github.event.workflow_run.id}}
      - name: Download Changes
        uses: dawidd6/action-download-artifact@v2
        with:
          name: visual-snapshot-changes-.+\.diff
          name_is_regexp: true
          path: .
          workflow: ${{github.event.workflow_run.workflow_id}}
          run_id: ${{github.event.workflow_run.id}}
          if_no_artifact_found: ignore
      - name: Apply Changes
        id: apply-changes
        run: |
          # apply changes
          git apply visual-snapshot-changes-*.diff/visual-snapshot-changes-*.diff
          rm visual-snapshot-changes-*.diff/visual-snapshot-changes-*.diff

          # delete unused screenshots
          npm run ts-node -- ./scripts/delete-unused-screenshots.ts
      - name: Check for Changes
        id: diff
        run: |
          git add .

          if git diff-index --quiet HEAD
          then
            echo "status=clean" >> $GITHUB_OUTPUT
          else
            echo "status=dirty" >> $GITHUB_OUTPUT
          fi
      - name: Push Changes
        if: ${{steps.diff.outputs.status == 'dirty'}}
        id: push-changes
        run: |
          repositoryUrl=${{github.server_url}}/${{github.repository}}.git
          updateBranchName=visual-snapshot-update/pr-${{steps.get-pr-event.outputs.pullRequestNumber}}

          # configure git
          git config user.name "GitHub"
          git config user.email "noreply@github.com"

          # commit changes
          git commit --message 'chore: update visual snapshots for `${{steps.get-pr-event.outputs.sourceHeadBranch}}`'

          # push changes
          git push $repositoryUrl HEAD:refs/heads/$updateBranchName --force

          # delete branch (it's not needed, only the commit needs to be in the repo)
          git push $repositoryUrl -d $updateBranchName

          # set commit-sha for next step
          echo "commit-sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
      - name: Comment
        if: ${{steps.diff.outputs.status == 'dirty'}}
        uses: peter-evans/create-or-update-comment@v2
        with:
          issue-number: ${{steps.get-pr-event.outputs.pullRequestNumber}}
          body: |
            This PR introduces visual changes: ${{steps.push-changes.outputs.commit-sha}}
            If these changes are intended and correct, please cherry-pick the above commit to this PR.

            ```
            git checkout ${{steps.get-pr-event.outputs.sourceHeadBranch}}
            git fetch ${{github.server_url}}/${{github.repository}}.git ${{steps.push-changes.outputs.commit-sha}}
            git cherry-pick ${{steps.push-changes.outputs.commit-sha}}
            git push
            ```
      - name: Fail if Visual Snapshots Changed
        if: ${{steps.diff.outputs.status == 'dirty'}}
        run: exit 1