sync-from-fork.yml

name: Sync from fork
on:
  schedule:
    # * is a special character in YAML so you have to quote this string
    - cron: "0 * * * *"
  workflow_dispatch:

jobs:
  check-for-changes:
    runs-on: ubuntu-latest
    env:
      FILES_TO_CHECK: "assets/assets.json|assets/resources/scriptlets.js|web_accessible_resources/|js/redirect-resources.js"
      UPSTREAM_URL: "https://github.com/gorhill/ublock.git"
    outputs:
      changes: ${{ steps.git-check.outputs.changes-present }}
    steps:
      - uses: actions/checkout@v4
      - name: Fetch release version
        run: |
          git remote add upstream ${UPSTREAM_URL}
          git fetch upstream && git diff --name-only --diff-filter AM HEAD..remotes/upstream/master > updatedfiles.txt
      - name: Check for modified files
        id: git-check
        run: echo changes-present=$(if grep -qE "${FILES_TO_CHECK}" updatedfiles.txt; then echo 'true'; else echo 'false'; fi) >> $GITHUB_OUTPUT
      - name: Show files
        run: cat updatedfiles.txt
      - name: Have files changed
        if: steps.check-for-changes.outputs.changes-present == 'false'
        run: echo "No changes needed to be synchronised"
  sync:
    if: ${{ needs.check-for-changes.outputs.changes == 'true' }}
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    needs: check-for-changes
    runs-on: ubuntu-latest
    steps:
      - name: Create mirror branch
        run: |
          git clone "https://github.com/gorhill/${GITHUB_REPOSITORY#$GITHUB_REPOSITORY_OWNER/}"
          cd ${GITHUB_REPOSITORY#$GITHUB_REPOSITORY_OWNER/}
          git checkout -b mirror
          git remote add github "https://$GITHUB_ACTOR:$GITHUB_TOKEN@github.com/$GITHUB_REPOSITORY.git"
          git push -u github mirror
  create-pr:
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    needs: sync
    runs-on: ubuntu-latest
    steps:
      - name: Create PR
        run: |
          gh pr create --title "Fork Sync: Update from parent repository" --body "This PR was automatically created by a GitHub Action triggered by a cron schedule. Please review the changes and merge if appropriate." --base master --head mirror --repo ${GITHUB_REPOSITORY} || true
  update-pr:
    needs: create-pr
    runs-on: ubuntu-latest
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      UPSTREAM_URL: "https://github.com/gorhill/ublock.git"
    steps:
      - uses: actions/checkout@v4
      - name: Collate Changes
        run: |
          git remote add upstream ${UPSTREAM_URL}
          git fetch upstream

          FILES_TO_CHECK=("assets/assets.json"  "assets/resources/scriptlets.js"  "src/web_accessible_resources"  "src/js/redirect-resources.js")
          for files in ${FILES_TO_CHECK[*]}; do
          echo '```diff' >> changes.txt;
          git diff --diff-filter AM HEAD..remotes/upstream/master -- $files >> changes.txt;
          echo -e '```\n' >> changes.txt;
          done;

          git remote remove upstream
      - name: Set PR Number to env
        run: echo "PR_NUMBER=`gh pr list | grep 'Fork Sync' | awk {'print $1'}`" >> $GITHUB_ENV
      - name: Update PR Description
        run: gh pr edit $PR_NUMBER -b "`cat "changes.txt"`"
      - name: Run puLL-Merge
        uses: brave/pull-merge@main
        with:
          owner: ${{ github.repository_owner }}
          repo: ${{ github.event.repository.name }}
          prnum: ${{ env.PR_NUMBER }}
          github_token: ${{ secrets.GITHUB_TOKEN }}
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
          filterdiff_args: --include=**/assets/assets.json --include=**/assets/resources/scriptlets.js --include=**/web_accessible_resources/ --include=**/js/redirect-resources.js
  on-failure:
    runs-on: ubuntu-latest
    if: ${{ always() && (needs.sync.result == 'failure' || needs.create-pr.result == 'failure' || needs.update-pr.result == 'failure') }}
    needs:
      - sync
      - create-pr
      - update-pr
    steps:
      - uses: 8398a7/action-slack@28ba43ae48961b90635b50953d216767a6bea486 # v3.16.2
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
        with:
          author_name: "Github Actions"
          status: failure
          fields: repo,message,commit,author,eventName,ref,workflow,pullRequest