docker.yaml

name: Docker

on:
  push:
    branches:
      - main
    paths:
      - 'pkg/**'
      - '*.go'
      - 'go.*'
      - Dockerfile
      - .github/workflows/docker.yaml
  pull_request:
    branches:
      - main
    paths:
      - 'pkg/**'
      - '*.go'
      - 'go.*'
      - Dockerfile
      - .github/workflows/docker.yaml
  release:
    types:
      - published

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  PLATFORMS: ${{ github.event_name == 'pull_request' && 'linux/amd64' || 'linux/amd64,linux/arm64' }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: "Generate Build ID (main)"
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        run: |
          branch=${GITHUB_REF##*/}
          sha=${GITHUB_SHA::8}
          ts=$(date +%s)
          echo "BUILD_ID=${branch}-${ts}-${sha}" >> $GITHUB_ENV

      - name: "Generate Build ID (PR)"
        if: github.event_name == 'pull_request'
        run: |
          echo "BUILD_ID=pr-${{ github.event.number }}-$GITHUB_RUN_ID" >> $GITHUB_ENV

      - name: "Generate Build ID (Release)"
        if: github.event_name == 'release'
        run: |
          echo "BUILD_ID=${GITHUB_REF##*/}" >> $GITHUB_ENV

      - name: 'Generate App Version'
        run: echo "VERSION=$(make version)" >> $GITHUB_ENV

      - name: Log in to the Container registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=pr
            type=ref,event=branch
            type=raw,value=${{ env.BUILD_ID }}
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ env.PLATFORMS }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            VERSION=${{ env.VERSION }}