docker_build.yml

name: Build Docker Image

on:
  workflow_call:
    inputs:
      version:
        description: "The version number"
        default: "1.0.0"
        required: false
        type: string
      registry:
        description: "The Docker Registry"
        default: "ghcr.io"
        required: false
        type: string
      image_name:
        description: "The Docker image name"
        default: ${{ github.repository }}
        required: false
        type: string
      folder_name:
        description: "The folder where the Dockerfile is located"
        default: .
        required: false
        type: string
      user_name:
        description: "The name of the user to login to the registry"
        default: ${{ github.actor }}
        required: false
        type: string
      run_number:
        description: "The workflow run number"
        default: ${{ github.run_number }}
        required: false
        type: string
      environment:
        description: "The GitHub environment to use (for environment-specific secrets/variables)"
        required: false
        type: string
      platforms:
        description: "The platforms to build for"
        required: false
        type: string
        default: linux/amd64,linux/arm64

    outputs:
      build_image:
        description: "The build image"
        value: ${{ jobs.build.outputs.build_image }}
      build_image_tag:
        description: "The build image tag"
        value: ${{ jobs.build.outputs.build_image_tag }}
      version:
        description: "The new version number"
        value: ${{ jobs.build.outputs.version }}

jobs:
  build:
    name: ${{ inputs.environment && format('Build {0} Image', inputs.environment) || 'Build Image' }}
    runs-on: ubuntu-latest
    environment: ${{ inputs.environment }}

    permissions:
      contents: read
      packages: write
      attestations: write

    outputs:
      build_image: ${{ steps.output.outputs.build_image }}
      build_image_tag: ${{ steps.output.outputs.build_image_tag }}
      version: ${{ steps.output.outputs.version }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      - name: Log in to the Container registry
        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
        with:
          registry: ${{ inputs.registry }}
          username: ${{ inputs.user_name }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
        with:
          images: ${{ inputs.registry }}/${{ inputs.image_name }}

      - name: Build and publish image
        id: push
        uses: docker/build-push-action@v7.0.0
        with:
          context: ${{ inputs.folder_name }}
          push: true
          tags: ${{ inputs.registry }}/${{ inputs.image_name }}:${{ inputs.version }}${{ inputs.environment && format('-{0}', inputs.environment) || '' }}-build.${{ inputs.run_number }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ inputs.platforms }}

      - name: Store outputs
        id: output
        run: |
          echo "build_image=${{ inputs.registry }}/${{ inputs.image_name }}" >> "$GITHUB_OUTPUT"
          echo "build_image_tag=${{ inputs.version }}${{ inputs.environment && format('-{0}', inputs.environment) || '' }}-build.${{ inputs.run_number }}" >> "$GITHUB_OUTPUT"
          echo "version=${{ inputs.version }}" >> "$GITHUB_OUTPUT"

      - name: Generate summary
        run: |
          echo "## Build Summary" >> $GITHUB_STEP_SUMMARY;
          echo "Build Image: ${{ inputs.registry }}/${{ inputs.image_name }}:${{ inputs.version }}${{ inputs.environment && format('-{0}', inputs.environment) || '' }}-build.${{ inputs.run_number }}" >> $GITHUB_STEP_SUMMARY;