delete_branches.yml

name: Delete Branches by Prefix
on:
    workflow_dispatch:
        inputs:
            branch-prefix:
                description: 'Branch prefix to match (e.g., "update--0.24.2-rc.89-" or "benchmark--0.25.0-")'
                required: true
                type: string
            dry-run:
                description: 'Dry run (show branches that would be deleted without deleting)'
                required: true
                type: boolean
                default: true

jobs:
    delete-branches:
        name: 'Delete branches with prefix ${{ inputs.branch-prefix }} | Dry run: ${{ inputs.dry-run }}'
        runs-on: ubuntu-latest
        steps:
            - uses: actions/checkout@v4
              with:
                  fetch-depth: 0
                  token: ${{ secrets.GITHUB_TOKEN }}

            - name: Collect branches
              id: collect-branches
              run: |
                  # Get branches and convert to space-separated list
                  BRANCHES=$(git branch -r | grep "origin/${{ inputs.branch-prefix }}" | sed 's/origin\///' | xargs)
                  echo "branches=$BRANCHES" >> $GITHUB_OUTPUT

            - name: Display collected branches
              run: |
                  echo "Branches matching prefix '${{ inputs.branch-prefix }}':"
                  for branch in ${{ steps.collect-branches.outputs.branches }}; do
                    echo "  - $branch"
                  done
                  echo "End of branch list"

            - name: Delete branches
              if: ${{ inputs.dry-run == false && steps.collect-branches.outputs.branches != '' }}
              run: |
                  echo "Deleting branches..."
                  git push origin --delete ${{ steps.collect-branches.outputs.branches }}
                  echo "Branch deletion complete"

            - name: Dry run message
              if: ${{ inputs.dry-run == true }}
              run: |
                  echo "DRY RUN - No branches were deleted"
                  echo "The above branches would have been deleted if this wasn't a dry run"