sub-find-cached-disks.yml

# Check if Cached State Disks Exist Workflow
# This workflow is designed to check the availability of cached state disks in Google Cloud Platform (GCP) for different types of Zcash applications.
# - Accepts network type as input to determine which disks to search for.
# - Checks for the existence of three types of disks: lightwalletd tip, Zebra tip, and Zebra checkpoint.
# - Uses Google Cloud SDK to query and identify available disks based on network and version.
# - Outputs the availability of each disk type, which can be utilized in subsequent workflows.
# The workflow streamlines the process of verifying disk availability, crucial for optimizing and speeding up integration tests and deployments.
name: Check if cached state disks exist

on:
  workflow_call:
    inputs:
      network:
        description: 'The Zcash network used to look up the disks'
        required: true
        type: string
      disk_prefix:
        required: false
        type: string
      disk_suffix:
        required: false
        type: string
      test_id:
        description: 'The test ID requiring the cached state disks'
        required: false
        type: string
    outputs:
      state_version:
        description: 'The version of the cached state disks'
        value: ${{ jobs.get-cached-disks.outputs.state_version }}
      cached_disk_name:
        description: 'The name of the cached state disk'
        value: ${{ jobs.get-cached-disks.outputs.cached_disk_name }}
      lwd_tip_disk:
        description: 'true if there is a lightwalletd and Zebra cached state disk, synced near the chain tip'
        value: ${{ jobs.get-cached-disks.outputs.lwd_tip_disk }}
      zebra_tip_disk:
        description: 'true if there is a Zebra cached state disk synced near the chain tip'
        value: ${{ jobs.get-cached-disks.outputs.zebra_tip_disk }}
      zebra_checkpoint_disk:
        description: 'true if there is a Zebra cached state disk synced to the mandatory Zebra checkpoint'
        value: ${{ jobs.get-cached-disks.outputs.zebra_checkpoint_disk }}

jobs:
  get-cached-disks:
    name: Get ${{  inputs.test_id || inputs.network }} cached disk
    runs-on: ubuntu-latest
    environment: ${{ github.event_name == 'release' && 'prod' || 'dev' }}
    outputs:
      state_version: ${{ steps.get-available-disks.outputs.state_version || steps.set-release-defaults.outputs.state_version }}
      cached_disk_name: ${{ steps.get-available-disks.outputs.cached_disk_name || steps.set-release-defaults.outputs.cached_disk_name }}
      lwd_tip_disk: ${{ steps.get-available-disks.outputs.lwd_tip_disk || steps.set-release-defaults.outputs.lwd_tip_disk }}
      zebra_tip_disk: ${{ steps.get-available-disks.outputs.zebra_tip_disk || steps.set-release-defaults.outputs.zebra_tip_disk }}
      zebra_checkpoint_disk: ${{ steps.get-available-disks.outputs.zebra_checkpoint_disk || steps.set-release-defaults.outputs.zebra_checkpoint_disk }}
    permissions:
      contents: 'read'
      id-token: 'write'
    steps:
      - uses: actions/checkout@v4.2.2
        with:
          persist-credentials: false
          fetch-depth: 0
      - name: Inject slug/short variables
        uses: rlespinasse/github-slug-action@v5
        with:
          short-length: 7

      # Setup gcloud CLI
      - name: Authenticate to Google Cloud
        id: auth
        uses: google-github-actions/auth@v2.1.10
        with:
          workload_identity_provider: '${{ vars.GCP_WIF }}'
          service_account: '${{ vars.GCP_DEPLOYMENTS_SA }}'

      - name: Set up Cloud SDK
        uses: google-github-actions/setup-gcloud@v2.1.4

      # Performs formatting on disk name components.
      #
      # Disk images in GCP are required to be in lowercase, but the blockchain network
      # uses sentence case, so we need to downcase ${{ inputs.network }}.
      #
      # Disk image names in GCP are limited to 63 characters, so we need to limit
      # branch names to 12 characters.
      # Check the `create-state-image` in `sub-deploy-integration-tests-gcp.yml` for more details in image names.
      # More info: https://cloud.google.com/compute/docs/naming-resources#resource-name-format
      #
      # Passes ${{ inputs.network }} to subsequent steps using $NETWORK env variable.
      # Passes ${{ env.GITHUB_REF_POINT_SLUG_URL }} to subsequent steps using $SHORT_GITHUB_REF env variable.
      - name: Format network name and branch name for disks
        run: |
          NETWORK_CAPS="${{ inputs.network }}"
          echo "ZEBRA_NETWORK__NETWORK=${NETWORK_CAPS,,}" >> "$GITHUB_ENV"
          LONG_GITHUB_REF="${{ env.GITHUB_REF_POINT_SLUG_URL }}"
          echo "SHORT_GITHUB_REF=${LONG_GITHUB_REF:0:12}" >> "$GITHUB_ENV"

      # Check if there are cached state disks available for subsequent jobs to use.
      # Skip disk lookup for releases - they should deploy from scratch or use production disks
      - name: Check if cached state disks exists
        id: get-available-disks
        if: ${{ github.event_name != 'release' }}
        env:
          GITHUB_REF: ${{ env.SHORT_GITHUB_REF }}
          NETWORK: ${{ env.NETWORK }} # use lowercase version from env, not input
          DISK_PREFIX: ${{ inputs.disk_prefix }}
          DISK_SUFFIX: ${{ inputs.disk_suffix }}
        run: |
          source ./.github/workflows/scripts/gcp-get-cached-disks.sh
          echo "state_version=${LOCAL_STATE_VERSION}" >> "${GITHUB_OUTPUT}"
          echo "cached_disk_name=${CACHED_DISK_NAME}" >> "${GITHUB_OUTPUT}"
          echo "lwd_tip_disk=${LWD_TIP_DISK}" >> "${GITHUB_OUTPUT}"
          echo "zebra_tip_disk=${ZEBRA_TIP_DISK}" >> "${GITHUB_OUTPUT}"
          echo "zebra_checkpoint_disk=${ZEBRA_CHECKPOINT_DISK}" >> "${GITHUB_OUTPUT}"

      # For releases, set default outputs indicating no cached disks are available
      - name: Set default outputs for releases
        id: set-release-defaults
        if: ${{ github.event_name == 'release' }}
        run: |
          echo "state_version=" >> "${GITHUB_OUTPUT}"
          echo "cached_disk_name=" >> "${GITHUB_OUTPUT}"
          echo "lwd_tip_disk=false" >> "${GITHUB_OUTPUT}"
          echo "zebra_tip_disk=false" >> "${GITHUB_OUTPUT}"
          echo "zebra_checkpoint_disk=false" >> "${GITHUB_OUTPUT}"