dncurrency/.github/workflows/prepare_release.yml

name:  Prepare Release
on:
  workflow_dispatch:

jobs:
  promote_reference:
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3.1.0
        with:
          ref: ${{ github.ref }}
          fetch-depth: 0
      - name: Confifigure git user and email
        run: |
          git config --global user.name "${GITHUB_ACTOR}"
          git config --global user.email "${GITHUB_ACTOR}@users.noreply.github.com"

      - name: Fetch Major and Minor versions
        id: fetch-versions
        run: |
          current_version_major=$(grep "CPACK_PACKAGE_VERSION_MAJOR" CMakeLists.txt | grep -o "[0-9]\+")
          current_version_minor=$(grep "CPACK_PACKAGE_VERSION_MINOR" CMakeLists.txt | grep -o "[0-9]\+")
          echo "Current major version: $current_version_major"
          echo "Current minor version: $current_version_minor"
          echo "major=${current_version_major}" >> $GITHUB_OUTPUT
          echo "minor=${current_version_minor}" >> $GITHUB_OUTPUT

      - name: Check for existence of release branch
        id: check-release-branch
        run: |
          release_branch_name="releases/v${{ steps.fetch-versions.outputs.major }}"
          if git show-ref --verify --quiet refs/remotes/origin/$release_branch_name; then
            echo "Release branch $release_branch_name already exists. Aborting..."
            exit 1
          else
            echo "Release branch does not exist. Continuing with preparation..."
            echo "release-branch-name=${release_branch_name}" >> $GITHUB_OUTPUT
          fi
          
      - name: Get default branch
        id: get-default-branch
        run: |
          DEFAULT_BRANCH=$(curl --silent --show-error --header "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "https://api.github.com/repos/${{ github.repository }}" | jq .default_branch --raw-output)
          echo "Default branch is $DEFAULT_BRANCH"          
          echo "default-branch=${DEFAULT_BRANCH}" >> $GITHUB_OUTPUT      

      - name: Increment Major version on default branch
        run: |
          git checkout ${{ steps.get-default-branch.outputs.default-branch }}
          new_version_major=$((${{ steps.fetch-versions.outputs.major }} + 1))
          sed -i.bak "s/set(CPACK_PACKAGE_VERSION_MAJOR \"[0-9]*\")/set(CPACK_PACKAGE_VERSION_MAJOR \"$new_version_major\")/g" CMakeLists.txt
          rm CMakeLists.txt.bak
          git add CMakeLists.txt
          git commit -m "Update CPACK_PACKAGE_VERSION_MAJOR to $new_version_major"
          git push origin ${{ steps.get-default-branch.outputs.default-branch }}
          # Reset CPACK_PACKAGE_VERSION_MAJOR to its original value for the release branch
          git reset --hard HEAD~1 

      - name: Prepare release branch and set pre-release to 0
        run: |
          git checkout -b ${{ steps.check-release-branch.outputs.release-branch-name }}
          sed -i.bak "s/set(CPACK_PACKAGE_VERSION_PRE_RELEASE \"[0-9]*\")/set(CPACK_PACKAGE_VERSION_PRE_RELEASE \"0\")/g" CMakeLists.txt
          rm CMakeLists.txt.bak
          git add CMakeLists.txt
          git commit -m "Update CPACK_PACKAGE_VERSION_PRE_RELEASE to 0"
          git push origin ${{ steps.check-release-branch.outputs.release-branch-name }}
        shell: bash
        env:
          GITHUB_ACTOR: ${{ github.actor }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}