dependabot-build.yml

name: Compile dependabot updates

on:
  pull_request:

jobs:
  fetch-dependabot-metadata:
    runs-on: ubuntu-latest

    # We only want to check the metadata on pull_request events from Dependabot itself,
    # any subsequent pushes to the PR should just skip this step so we don't go into
    # a loop on commits created by the `build-dependabot-changes` job
    if: ${{ github.event.pull_request.user.login == 'dependabot[bot]' }}
    # Map the step output to a job output for subsequent jobs
    outputs:
      dependency-type: ${{ steps.dependabot-metadata.outputs.dependency-type }}
      package-ecosystem: ${{ steps.dependabot-metadata.outputs.package-ecosystem }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}

      - name: Fetch dependabot metadata
        id: dependabot-metadata
        uses: ./

  build-dependabot-changes:
    runs-on: ubuntu-latest
    needs: [fetch-dependabot-metadata]

    # We only need to build the dist/ folder if the PR relates a production NPM dependency, otherwise we don't expect changes.
    if: needs.fetch-dependabot-metadata.outputs.package-ecosystem == 'npm_and_yarn' && needs.fetch-dependabot-metadata.outputs.dependency-type == 'direct:production'
    steps:
      - name: Generate token
        id: generate_token
        uses: actions/create-github-app-token@f2acddfb5195534d487896a656232b016a682f3c # v1.9.0
        with:
          app-id: ${{ secrets.FETCH_METADATA_ACTION_AUTOMATION_APP_ID }}
          private-key: ${{ secrets.FETCH_METADATA_ACTION_AUTOMATION_PRIVATE_KEY }}

      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          # Check out using an app token so any pushed changes will trigger checkruns
          token: ${{ steps.generate_token.outputs.token }}

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version-file: .nvmrc

      - name: Install NPM dependencies
        run: npm ci

      - name: Rebuild the dist/ directory
        run: npm run build

      - name: Check in any change to dist/
        run: |
          git add dist/
          # Specifying the full email allows the avatar to show up: https://github.com/orgs/community/discussions/26560
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git commit -m "[dependabot skip] Update dist/ with build changes" || exit 0
          git push