name: 'Setup GKE Auth'
description: 'Authorize to a GKE cluster'
branding:
  icon: cloud-lightning
  color: blue
inputs:
  version:
    description: 'Version of gke-auth to install (tip, latest-release, v0.1, etc.)'
    required: true
    default: 'latest-release'
  project:
    description: "GCP project"
    required: true
  location:
    description: "Region or zone of the cluster"
    required: true
  cluster:
    description: "Name of the cluster"
    required: true
  alias:
    description: "Alias name for the kubeconfig context (defaults to gke_{project}_{location}_{cluster})"
    required: false
    default: ""
  registry_location:
    description: "Region or multi-region of the Artifact Registry instance"
    required: false
    default: ""
runs:
  using: "composite"
  steps:
  - shell: bash
    run: |
      set -ex

      # Install gke-auth:
      # - if version is "tip", `go install` from tip of main.
      # - if version is "latest-release", look up latest release.
      # - otherwise, install the specified version.
      case ${{ inputs.version }} in
      tip)
        echo "Installing gke-auth using go install"
        go install github.com/imjasonh/gke-auth@main
        ;;
      latest-release)
        tag=$(curl -s -u "username:${{ github.token }}" https://api.github.com/repos/imjasonh/gke-auth/releases/latest | jq -r '.tag_name')
        ;;
      *)
        tag="${{ inputs.version }}"
      esac

      if [[ ! -z ${tag} ]]; then
        echo "Installing gke-auth @ ${tag}"
        curl -fsL https://github.com/imjasonh/gke-auth/releases/download/${tag}/gke-auth_${tag:1}_Linux_x86_64.tar.gz | sudo tar xzf - -C /usr/local/bin gke-auth
      fi

      if [[ "${{ inputs.registry_location }}" != "" ]]; then
        gke-auth --location=${{ inputs.registry_location }} --configure-docker
      fi

      args=(
        --project=${{ inputs.project }}
        --location=${{ inputs.location }}
        --cluster=${{ inputs.cluster }}
      )
      if [[ "${{ inputs.alias }}" != "" ]]; then
        args+=(--alias=${{ inputs.alias }})
      fi

      gke-auth "${args[@]}"