name: build

on:
  push:
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+'
      - 'v[0-9]+.[0-9]+.[0-9]+-*'
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64

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

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

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

      - name: Log in to Container Registry
        uses: docker/login-action@v3
        with:
          registry: docker.io
          username: ${{ secrets.DOCKER_LOGIN }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ secrets.DOCKER_REGISTRY }}
          tags: |
            type=semver,pattern={{raw}}
            type=raw,value=latest

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: VERSION=${{ steps.meta.outputs.version }}
          cache-from: type=gha,scope=build-${{ matrix.platform }}
          cache-to: type=gha,mode=max,scope=build-${{ matrix.platform }}
          outputs: type=image,name=${{ secrets.DOCKER_REGISTRY }},push-by-digest=true,name-canonical=true,push=true

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ strategy.job-index }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

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

    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

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

      - name: Log in to Container Registry
        uses: docker/login-action@v3
        with:
          registry: docker.io
          username: ${{ secrets.DOCKER_LOGIN }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ secrets.DOCKER_REGISTRY }}
          tags: |
            type=semver,pattern={{raw}}
            type=raw,value=latest

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ secrets.DOCKER_REGISTRY }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ secrets.DOCKER_REGISTRY }}:${{ steps.meta.outputs.version }}