action.yaml

name: Build and Push Container Image
description: Build and push Docker image to Google Artifact Registry
inputs:
  name:
    description: The name of the image to build
    required: true
  context:
    description: The Docker context
    required: true
    default: .
  file:
    description: The Dockerfile to build
    required: true
    default: Dockerfile
  project:
    description: The Google Cloud Platform project to push to
    required: true
  repository:
    description: The repository in Google Artifact Registry to push to
    required: true
  region:
    description: The Google Cloud Platform region where the repository is located
    required: true
    default: europe-west3
  serviceAccountKey:
    description: The Service Account key to authenticate with Google Artifact Registry
    required: true
  build-args:
    description: "List of build-time variables"
    required: false
  tags:
    description: Image tag generation parameters
    required: false
outputs:
  image:
    description: The pushed image including the tag
    value: ${{steps.push.outputs.image}}
runs:
  using: composite
  steps:
    - name: Generate metadata
      id: meta
      shell: bash
      run: |
        echo "::set-output name=registry::${{inputs.region}}-docker.pkg.dev"
        echo "::set-output name=image::${{inputs.region}}-docker.pkg.dev/${{inputs.project}}/${{inputs.repository}}/${{inputs.name}}"
    - name: Authenticate Docker with Artifact Registry
      uses: docker/login-action@v2
      with:
        registry: ${{steps.meta.outputs.registry}}
        username: _json_key
        password: ${{inputs.serviceAccountKey}}
    - name: Generate metadata for Docker
      id: image
      uses: docker/metadata-action@v4
      with:
        images: ${{steps.meta.outputs.image}}
        tags: ${{inputs.tags}}
    - name: Build image and push to Artifact Registry
      uses: docker/build-push-action@v3
      with:
        context: ${{inputs.context}}
        file: ${{inputs.file}}
        build-args: ${{inputs.build-args}}
        push: true
        tags: ${{steps.image.outputs.tags}}
        labels: ${{steps.image.outputs.labels}}