create-release-branch.yaml

name: Create Release Branch

on:
  milestone:
    types:
    - closed

env:
  artifactId: gaffer2
  MAVEN_OPTS: -Dmaven.wagon.http.retryHandler.count=3 -Dmaven.wagon.httpconnectionManager.ttlSeconds=25

jobs:
  create-release-branch:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout develop
      uses: actions/checkout@v4
      with:
        ref: develop
        token: ${{ secrets.ADMIN_GITHUB_TOKEN }}
        fetch-depth: 0

    - name: Set version from milestone
      run: echo "RELEASE_VERSION=$(echo ${{ github.event.milestone.title }})" >> $GITHUB_ENV

    - name: Set release branch
      run: echo "BRANCH_NAME=$(echo release/"${{ env.RELEASE_VERSION }}" )" >> $GITHUB_ENV

    - name: Set up Github credentials
      run: |
        git config user.name github-actions[bot]
        git config user.email 41898282+github-actions[bot]@users.noreply.github.com

    - name: Update versions
      run: |
        mvn versions:set-property -Dproperty=revision -DnewVersion=${RELEASE_VERSION} -DgenerateBackupPoms=false

    - name: Push to release branch
      run: |
        git checkout -b $BRANCH_NAME
        git commit -a -m "prepare release $artifactId-$RELEASE_VERSION"
        git push --set-upstream origin $BRANCH_NAME

    - name: Tag release branch
      run: |
        git tag gaffer2-$RELEASE_VERSION
        git push origin --tags

    - name: Create PR to master
      run: |
        gh pr create -B master -H $BRANCH_NAME --title 'Merge release into master branch' --body 'Created by GH Action'
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}