Remove old versions of Google App Engine with GitHub Actions

delete-old-gae.yml

name: Remove old versions of Google App Engine

#####
# 
# Add this file to .github/workflows/delete-old-gae.yml then GitHub Actions will remove old versions of Google App Engine.
# 
#####

on:
  workflow_dispatch:
  schedule: [{ cron: '0 0 * * *' }]

jobs:
  remove-old-versions:
    runs-on: ubuntu-latest

    permissions:
      contents: read
      id-token: write

    steps:
      - name: Cloud Auth
        uses: google-github-actions/auth@v0
        with:
          # You need to add GCP_CREDENTIALS to your GitHub secrets:
          # cat your-service-key.json | base64 | pbcopy
          credentials_json: '${{ secrets.GCP_CREDENTIALS }}'

      - name: Set up Cloud SDK
        uses: google-github-actions/setup-gcloud@v0

      - name: Remove old versions of Google App Engine
        env:
          CI: true
          # Set your project id here.
          PROJECT_ID: your-project-2023
        # Delete only the 30th and older version IDs
        run: gcloud app versions list --project ${PROJECT_ID} --format 'value(version.id)' --sort-by '~version' | tail -n +30 | xargs --no-run-if-empty gcloud app versions delete --project ${PROJECT_ID} --quiet