clean-workflows.yaml

name: Clean Up Obsolete Workflows

on:
  schedule:
    - cron: "0 0 1 * *" # Run monthly on the 1st day of each month at midnight UTC
  workflow_dispatch: # Allow manual triggering

jobs:
  cleanup:
    runs-on: ubuntu-latest
    permissions:
      actions: write
      contents: read
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Clean up obsolete workflows
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail

          # Get all workflow files in the current repository
          current_workflows=$(find .github/workflows -print0 -name "*.yml" -o -name "*.yaml" | xargs -0 -I {} basename {})

          # Get all workflows from the Actions tab
          all_workflows=$(gh api repos/${{ github.repository }}/actions/workflows | jq -r '.workflows[].path' | xargs -I {} basename {})

          # Find obsolete workflows
          obsolete_workflows=$(comm -23 <(echo "$all_workflows" | sort) <(echo "$current_workflows" | sort) | grep -v "dependabot-updates" || true)

          # Check if there are any obsolete workflows
          if [ -z "$obsolete_workflows" ]; then
            echo "No obsolete workflows found. Exiting."
            exit 0
          fi

          # Delete runs of obsolete workflows
          for workflow in $obsolete_workflows; do
            echo "Cleaning up obsolete workflow: $workflow"
            runs=$(gh run list --workflow "$workflow" --json databaseId --jq '.[].databaseId')
            if [ -z "$runs" ]; then
              echo "No runs found for workflow: $workflow"
              continue
            fi
            for run_id in $runs; do
              gh run delete "$run_id"
              echo "Deleted run $run_id of workflow $workflow"
            done
          done

          echo "Cleanup completed successfully."
          exit 0