preview-env-gc.yml

name: "Preview environment garbage collection"
on:
  workflow_dispatch:
  schedule:
    - cron: "0 */4 * * *"
jobs:
  create-runner:
    uses: gitpod-io/gce-github-runner/.github/workflows/create-vm.yml@main
    secrets:
      runner_token: ${{ secrets.SELF_HOSTED_GITHUB_RUNNER_TOKEN }}
      gcp_credentials: ${{ secrets.SELF_HOSTED_GITHUB_RUNNER_GCP_CREDENTIALS }}

  stale:
    name: "Find stale preview environments"
    runs-on: ${{ needs.create-runner.outputs.label }}
    needs: [create-runner]
    container:
      image: eu.gcr.io/gitpod-core-dev/dev/dev-environment:at-node-18-17-1-gha.15610
    outputs:
      names: ${{ steps.set-matrix.outputs.names }}
      count: ${{ steps.set-matrix.outputs.count }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Compute matrix
        id: set-matrix
        shell: bash
        env:
          PREVIEW_ENV_DEV_SA_KEY: ${{ secrets.GCP_CREDENTIALS }}
        run: |
          set -euo pipefail

          export LEEWAY_WORKSPACE_ROOT="$(pwd)"
          export HOME="/home/gitpod"
          export PREVIEW_ENV_DEV_SA_KEY_PATH="/home/gitpod/.config/gcloud/preview-environment-dev-sa.json"
          # Used by 'previewctl list stale'
          export GOOGLE_APPLICATION_CREDENTIALS="/home/gitpod/.config/gcloud/preview-environment-dev-sa.json"

          echo "${PREVIEW_ENV_DEV_SA_KEY}" > "${PREVIEW_ENV_DEV_SA_KEY_PATH}"
          gcloud auth activate-service-account --key-file "${PREVIEW_ENV_DEV_SA_KEY_PATH}"

          leeway run dev/preview/previewctl:install

          previewctl get-credentials --gcp-service-account "${PREVIEW_ENV_DEV_SA_KEY_PATH}"
          previewctl list stale | jq --null-input --raw-input --compact-output '[inputs | select(length>0)]' > /tmp/stale-json
          echo "names=$(cat /tmp/stale-json)" >> $GITHUB_OUTPUT
          echo "count=$(jq '. | length' /tmp/stale-json)" >> $GITHUB_OUTPUT

  delete:
    name: "Delete preview environment"
    needs: [stale, create-runner]
    runs-on: ${{ needs.create-runner.outputs.label }}
    if: ${{ needs.stale.outputs.count > 0 }}
    strategy:
      fail-fast: false
      matrix:
        name: ${{ fromJSON(needs.stale.outputs.names) }}
    steps:
      - uses: actions/checkout@v3
      - name: Delete preview environment ${{ matrix.name }}
        uses: ./.github/actions/delete-preview
        with:
          name: ${{ matrix.name }}
          sa_key: ${{ secrets.GCP_CREDENTIALS }}

  delete-runner:
    if: always()
    needs:
      - create-runner
      - stale
      - delete
    uses: gitpod-io/gce-github-runner/.github/workflows/delete-vm.yml@main
    secrets:
      gcp_credentials: ${{ secrets.SELF_HOSTED_GITHUB_RUNNER_GCP_CREDENTIALS }}
    with:
      runner-label: ${{ needs.create-runner.outputs.label }}
      machine-zone: ${{ needs.create-runner.outputs.machine-zone }}