back-merge-handler.yml

name: Back Merge handler

on:
  push:
    branches:
      - master
      - stable

jobs:
  pr_master_to_stable:
    runs-on: ubuntu-latest
    if: github.ref_name == 'master'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check if PR exists
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          prs=$(gh pr list \
              --repo "$GITHUB_REPOSITORY" \
              --json baseRefName,headRefName \
              --jq '
                  map(select(.baseRefName == "stable" and .headRefName == "master"))
                  | length
              ')
          if ((prs > 0)); then
              echo "Pull Request already exists"
              echo "SKIP=true" >> $GITHUB_ENV
          fi

      - name: Check if stable is ahead
        run: |
          commits=$(git rev-list origin/stable..origin/master --count)
          if ((commits == 0)); then
            echo "No diffs was found between branches"
            echo "SKIP=true" >> $GITHUB_ENV
          fi

      - name: Create Pull Request
        if: env.SKIP != 'true'
        run: gh pr create -B stable -H master --title '[GitHub Actions] Merge master -> stable' --label back-merge --body 'Autogenerated Pull Request for `back-merge` triggered by Github Actions'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  pr_stable_to_develop:
    runs-on: ubuntu-latest
    if: github.ref_name == 'stable'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check if PR exists
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          prs=$(gh pr list \
              --repo "$GITHUB_REPOSITORY" \
              --json baseRefName,headRefName \
              --jq '
                  map(select(.baseRefName == "develop" and .headRefName == "stable"))
                  | length
              ')
          if ((prs > 0)); then
            echo "Pull Request already exists"
            echo "SKIP=true" >> $GITHUB_ENV
          fi

      - name: Check if stable is ahead
        run: |
          commits=$(git rev-list origin/develop..origin/stable --count)
          if ((commits == 0)); then
            echo "No diffs was found between branches"
            echo "SKIP=true" >> $GITHUB_ENV
          fi

      - name: Create Pull Request
        if: env.SKIP != 'true'
        run: gh pr create -B develop -H stable --title '[GitHub Actions] Merge stable -> develop' --label back-merge --body 'Autogenerated Pull Request for `back-merge` triggered by Github Actions'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}