sync-develop.yml

name: Sync Develop Branch

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  sync-develop:
    name: Sync develop branch with main
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        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: Fetch all branches
        run: |
          git fetch origin main
          git fetch origin develop

      - name: Check if develop branch exists
        id: check-develop
        run: |
          if git show-ref --verify --quiet refs/remotes/origin/develop; then
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Create develop branch if it doesn't exist
        if: steps.check-develop.outputs.exists == 'false'
        run: |
          git checkout -b develop
          git push origin develop

      - name: Sync develop with main
        if: steps.check-develop.outputs.exists == 'true'
        run: |
          git checkout develop
          DEVELOP_BEFORE=$(git rev-parse HEAD)
          MAIN_COMMIT=$(git rev-parse origin/main)

          if [ "$DEVELOP_BEFORE" = "$MAIN_COMMIT" ]; then
            echo "develop is already up to date"
            exit 0
          fi

          if git merge --ff-only origin/main; then
            git push origin develop
          else
            DIVERGED_COMMITS=$(git rev-list --count origin/main..develop)
            if [ "$DIVERGED_COMMITS" -gt 0 ]; then
              echo "develop has $DIVERGED_COMMITS commits not in main"
              git log --oneline origin/main..develop
              exit 1
            else
              exit 1
            fi
          fi

      - name: Create summary
        if: always()
        run: |
          echo "## Develop Branch Sync Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- **Main commit**: \`$(git rev-parse origin/main)\`" >> $GITHUB_STEP_SUMMARY
          echo "- **Status**: ${{ job.status }}" >> $GITHUB_STEP_SUMMARY