Deploy to GKE in two phases, which will do the following:

Prepare Phase:
  - Expand Kubernetes configuration files:
    - Set the digest of images that match the [--image|-i] flag, if provided.
    - Add app.kubernetes.io/name=[--app|-a] label, if provided.
    - Add app.kubernetes.io/version=[--version|-v] label, if provided.

Apply Phase:
  - Apply Kubernetes configuration files to the target cluster with the provided namespace.
  - Wait for deployed Kubernetes configuration files to be ready before exiting.

Usage:
  gke-deploy [command]

Examples:
  # Expand Kubernetes configuration files and deploy to GKE cluster.
  gke-deploy run -f configs -i gcr.io/my-project/my-app:1.0.0 -a my-app -v 1.0.0 -o expanded -n my-namespace -c my-cluster -l us-east1-b

  # Deploy to GKE cluster that kubectl is currently targeting.
  gke-deploy run -f configs

  # Deploy to GKE cluster that kubectl is currently targeting without supplying any Kubernetes configuration files. Have gke-deploy generate suggested Kubernetes configuration files for your application using an image, app name, and service port.
  gke-deploy run -i nginx -a nginx -x 80

  # Prepare only.
  gke-deploy prepare -f configs -i gcr.io/my-project/my-app:1.0.0 -a my-app -v 1.0.0 -o expanded -n my-namespace

  # Apply only.
  gke-deploy apply -f configs -n my-namespace -c my-cluster -l us-east1-b

  # Execute prepare and apply, with an intermediary step in between (e.g., manually check expanded YAMLs)
  gke-deploy prepare -f configs -i gcr.io/my-project/my-app:1.0.0 -a my-app -v 1.0.0 -o expanded -n my-namespace
  cat expanded/*
  gke-deploy apply -f expanded -n my-namespace -c my-cluster -l us-east1-b  # Pass expanded directory to -f

  # Pipe output from another templating engine to gke-deploy.
  kustomize build overlays/staging | gke-deploy run -f - -a my-app -c my-cluster -l us-east1-b
  helm template charts/prometheus | gke-deploy apply -f - -c my-cluster -l us-east1-b  # No need to run Tiller in cluster

Available Commands:
  apply       Skip prepare phase and execute apply phase
  help        Help about any command
  prepare     Execute prepare phase and skip apply phase
  run         Execute both prepare and apply phase

Flags:
  -h, --help   help for gke-deploy

Use "gke-deploy [command] --help" for more information about a command.