name: GAR Cleanup

on:
    schedule:
        - cron: '30 6 * * *'
    workflow_dispatch: {}
    workflow_run:
        workflows: ['Deploy']
        types:
            - completed

jobs:
    docker_cleanup:
        name: Cleanup Deployed Images
        runs-on: ubuntu-latest
        strategy:
            matrix:
                region: [us, europe, asia]
            fail-fast: false
        steps:
            - name: Set up Cloud SDK
              uses: google-github-actions/setup-gcloud@master
              with:
                  project_id: ${{ secrets.GCS_PROJECT_ID }}
                  service_account_key: ${{ secrets.GCS_TF_KEY }}
                  export_default_credentials: true

            - name: Delete stale artifacts
              run: |
                  flags="--format=json --location=${{matrix.region}} --repository=roleypoly"

                  packagesToPrune=$(gcloud artifacts packages list $flags | jq -r '.[].name')

                  for package in $packagesToPrune; do
                    tagsToKeep=$(gcloud artifacts tags list --package=$package $flags | jq -r '.[].version')
                    versionsToCheck=$(gcloud artifacts versions list --package=$package $flags | jq -r '.[].name')

                    for version in $versionsToCheck; do
                      if [[ "$tagsToKeep" =~ .*"$version".* ]]; then
                        continue
                      fi

                      gcloud artifacts versions delete $version --package=$package $flags --quiet
                    done
                  done