brave-core/.github/workflows/sync-and-rebase-pr-from-fork.yml at master · CloverLabsAI/brave-core · GitHub

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name: Sync and rebase PR from fork

on:
  workflow_dispatch:
    inputs:
      PR_NUMBER:
        required: false
        description: "Number of the PR from the fork"
      COMMIT_HASH:
        required: true
        description: "Commit hash of the PR"

permissions:
  contents: write
  pull-requests: write

jobs:
  sync-and-rebase-pr-from-fork:
    runs-on: ubuntu-slim
    steps:
      - name: Checkout repository
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          fetch-depth: 0

      - name: Setup Git
        run: |
          git config user.name brave-builds
          git config user.email devops@brave.com
          git config push.default simple

      - name: Sync and rebase PR from fork
        env:
          GITHUB_TOKEN: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
          PR_NUMBER: ${{ inputs.PR_NUMBER }}
          COMMIT_HASH: ${{ inputs.COMMIT_HASH }}
        run: |
          set -x

          if ! grep -qix '[0-9a-f]\{40,40\}' <<<"$COMMIT_HASH"; then
            echo "Provide a full commit hash; got: $COMMIT_HASH"
            exit 1
          fi

          pr_number="${PR_NUMBER:-"$(gh pr list --search "$COMMIT_HASH" --json number -q '.[].number')"}"
          gh_pr_view=$(gh pr view "${pr_number:?}" --json baseRefName,headRefName,headRepository,headRepositoryOwner,id,isCrossRepository,url)

          JQ="jq -e -r"
          baseRefName=$($JQ ".baseRefName" <<<"$gh_pr_view")
          headRefName=$($JQ ".headRefName" <<<"$gh_pr_view")
          headRepositoryName=$($JQ ".headRepository.name" <<<"$gh_pr_view")
          headRepositoryOwnerLogin=$($JQ ".headRepositoryOwner.login" <<<"$gh_pr_view")
          isCrossRepository=$($JQ ".isCrossRepository" <<<"$gh_pr_view")
          url=$($JQ ".url" <<<"$gh_pr_view")

          [[ "$isCrossRepository" = "true" ]] || { echo "PR is not cross repo. Exiting!"; exit 1; }

          git remote add contributor "https://github.com/$headRepositoryOwnerLogin/$headRepositoryName.git" || :
          contribHeadRefName="contributor-$headRepositoryOwnerLogin-$headRefName"
          git fetch --no-tags contributor +"$headRefName":"$contribHeadRefName"
          # Note we are checking out the provided commit hash instead of the pr-branch to avoid race condition
          # The author could have commited malicious code between the last review and the execution of this workflow
          git checkout "$COMMIT_HASH"

          # Rebase the branch with the latest targeting branch HEAD
          git fetch origin "$baseRefName"
          if ! git rebase FETCH_HEAD; then
            echo "Rebase conflict detected. Please resolve the conflicts and push the changes to your fork. Exiting!"
            exit 1
          fi
          git push -f origin HEAD:"refs/heads/$contribHeadRefName"

          existing_prs=$(gh pr list -H "$contribHeadRefName" --json number)
          if [[ "$existing_prs" = "[]" ]]; then
            gh pr create \
              --draft \
              --base "$baseRefName" \
              --head "$contribHeadRefName" \
              --title "CI run for contributor PR #$pr_number" \
              --body \
          "## Description
          This PR is created to run CI on the changes proposed in PR #$pr_number by @$headRepositoryOwnerLogin.

          **This PR should not be merged.**"
          fi