create-release-branch.yaml

# Copyright 2021-2024 Crown Copyright
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name: Create Release Branch

on:
  milestone:
    types:
    - closed

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
      if: ${{ github.event.milestone.title }}
      run: echo "RELEASE_VERSION=$(echo ${{ github.event.milestone.title }} | sed 's/^v//')" >> $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: |
        ./cd/update_versions.sh ${RELEASE_VERSION}

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

    - name: Tag release branch
      run: |
        git tag v${RELEASE_VERSION}
        git push origin v${RELEASE_VERSION}
        git push

    - name: Create PR to master
      run: |
        gh pr create -B master -H $BRANCH_NAME --title 'Updated Gaffer version to ${{ github.event.milestone.title }}' --body 'Created by GH Action'
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}