action.yml

name: "Release Docker Image to GCP Artifact Registry"
description: "GitHub Action to build a Docker image and push it to GCP Artifact Registry."

inputs:
  gcp_artifact_registry:
    description: GCP_ARTIFACT_REGISTRY
    required: true
  gcp_project_id:
    description: GCP_PROJECT_ID
    required: true
  gcp_region:
    description: GCP_REGION
    required: true
  gcp_service_account_email:
    description: GCP_SERVICE_ACCOUNT_EMAIL
    required: true
  gcp_workload_identity_provider:
    description: GCP_WORKLOAD_IDENTITY_PROVIDER
    required: true
  image_tag:
    description: IMAGE_TAG
    required: true
  slack_webhook_url:
    description: "SLACK_WEBHOOK_URL"
    required: false
    default: ""


runs:
  using: "composite"
  steps:
  - name: 'Checkout'
    uses: actions/checkout@v4

  - name: 'Authenticate to Google Cloud'
    uses: 'google-github-actions/auth@v1'
    with:
      workload_identity_provider: ${{ inputs.gcp_workload_identity_provider }}
      service_account: ${{ inputs.gcp_service_account_email }}

  - name: 'Setup Google Cloud CLI'
    uses: 'google-github-actions/setup-gcloud@v1'
    with:
      version: '>= 421.0.0'

  - name: 'Add Artifact Registry to Docker'
    run: 'gcloud auth configure-docker ${{ inputs.gcp_region }}-docker.pkg.dev'
    shell: bash

  - name: 'Build Docker image and push to Artifact Registry'
    env:
      IMAGE_PATH: '${{ inputs.gcp_region }}-docker.pkg.dev/${{ inputs.gcp_project_id }}/${{ inputs.gcp_artifact_registry }}/${{ github.event.repository.owner.login }}/${{ github.event.repository.name }}'
      IMAGE_TAG: '${{ inputs.image_tag }}'
    run: |
      docker build --build-arg APP_VERSION=${IMAGE_TAG} -t ${IMAGE_PATH,,}:${IMAGE_TAG} .
      docker push ${IMAGE_PATH,,}:${IMAGE_TAG}
    shell: bash

  - name: Notify slack
    if: ${{ inputs.slack_webhook_url != '' }}
    env:
      MESSAGE: "${{ github.event.repository.owner.login }}/${{ github.event.repository.name }}:${{ inputs.image_tag }} has been pushed to GCP Artifact Registry"
    run: |
      curl -X POST -H 'Content-type: application/json' --data "{\"text\":\"${MESSAGE}\"}" ${{ inputs.slack_webhook_url }}
    shell: bash