pre-release.yml

name: Rolling release
on:
  push:
    tags:
      - "v*.*.*"

permissions: write-all

jobs:
  automate-tagging:
    name: "Perform rolling release"
    runs-on: ubuntu-latest
    steps:
    - name: "Checkout repository"
      uses: actions/checkout@v4

    - name: "Configure git"
      run: |
          git config user.name github-actions
          git config user.email github-actions@github.com

    - name: "Decompose tag into components"
      run: |
        if [[ ${{ github.ref_name }} =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
          # Split the tag into its components
          IFS='.' read -ra PARTS <<< "${{ github.ref_name }}"
          echo "X=${PARTS[0]}" >> $GITHUB_ENV
          echo "Y=${PARTS[1]}" >> $GITHUB_ENV
          echo "Z=${PARTS[2]}" >> $GITHUB_ENV
        else
          echo "Invalid tag format. Expected vX.Y.Z but got ${{ github.ref_name }}"
          exit 1
        fi

    - name: "Verify tag was created in the proper release branch"
      run: |
        # Remove leading "v" from env.X
        X_NO_V="${X:1}"
        # Check if the tag was created in the proper branch
        if [[ ${{ github.event.base_ref }} != "refs/heads/release/${X_NO_V}.${{ env.Y }}" ]]; then
          echo "Tag ${{ github.ref_name }} was created in the wrong branch. Expected branch name release/${X_NO_V}.${{ env.Y }}"
          exit 1
        fi

    - name: "Remove old tags"
      run: |
          git push --delete origin ${{ env.X }}
          git push --delete origin ${{ env.X }}.${{ env.Y }}

    - name: "Create new tags"
      run: |
          git tag ${{ env.X }}.${{ env.Y }}
          git tag ${{ env.X }}
          git push origin ${{ env.X }}.${{ env.Y }}
          git push origin ${{ env.X }}