auto-backport-master-to-develop.yml

name: Auto PR from Master to Develop

on:
  push:
    branches:
      - master

permissions:
  contents: read
  pull-requests: write

jobs:
  create-pr:
    runs-on: ubuntu-latest
    # Skip if the commit message contains merge-related keywords
    if: |
      !contains(github.event.head_commit.message, 'Merge pull request') &&
      !contains(github.event.head_commit.message, 'Merge branch') &&
      !startsWith(github.event.head_commit.message, 'Merge')
    
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Configure Git
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

      - name: Get commit details
        id: commit-info
        run: |
          git fetch origin develop

          COMMITS=$(git log origin/develop..HEAD --pretty=format:"- %h %s")
          
          # Store commits in a file to handle multiline content
          echo "$COMMITS" > commits.txt

      - name: Check if PR already exists
        id: check-pr
        run: |
          # Check if there's already an open PR from master to develop
          EXISTING_PR=$(gh pr list --head master --base develop --state open --json number --jq '.[0].number // empty')
          echo "existing_pr=$EXISTING_PR" >> $GITHUB_OUTPUT
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Create Pull Request
        if: steps.check-pr.outputs.existing_pr == ''
        run: |
          # Read commits from file
          COMMITS_LIST=$(cat commits.txt)
          
          # Create PR description with merge instruction
          PR_DESCRIPTION="**Please perform \`Merge & Commit\` to preserve commit history to avoid commit conflicts**
          
          $COMMITS_LIST"

          # Create the PR
          gh pr create \
            --title "chore: Sync Changes from Master to Develop" \
            --body "$PR_DESCRIPTION" \
            --head master \
            --base develop
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Update existing PR
        if: steps.check-pr.outputs.existing_pr != ''
        run: |
          # Read commits from file
          COMMITS_LIST=$(cat commits.txt)
          PR_DESCRIPTION="**Please perform \`Merge & Commit\` to preserve commit history to avoid commit conflicts**
          
          $COMMITS_LIST"
 
          # Update the existing PR
          gh pr edit ${{ steps.check-pr.outputs.existing_pr }} \
            --body "$PR_DESCRIPTION"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}