name: Docker

on:
  workflow_dispatch:
  push:
    branches:
      - main
      - beta
    tags:
      - "v**"

env:
  REGISTRY_IMAGE: acouvreur/sablier

jobs:
  build:
    name: Build Sablier Docker image
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm/v7
          - linux/arm64
    
    steps:
      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV 
          
      - name: Checkout
        uses: actions/checkout@v4

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          # list of Docker images to use as base name for tags
          images: |
            ghcr.io/${{ env.REGISTRY_IMAGE }}
            ${{ env.REGISTRY_IMAGE }}
          # generate Docker tags based on the following events/attributes
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Go Build Cache for Docker
        uses: actions/cache@v4
        with:
          path: go-build-cache
          key: ${{ runner.os }}-go-build-cache-${{ hashFiles('**/go.sum') }}

      - name: inject go-build-cache into docker
        # v1 was composed of two actions: "inject" and "extract".
        # v2 is unified to a single action.
        uses: reproducible-containers/buildkit-cache-dance@v3
        with:
          cache-map: |
            {
              "go-build-cache": "/root/.cache/go-build"
            }

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          version: latest
          buildkitd-flags: --debug

      - name: Login to ghcr.io
        uses: docker/login-action@v3 
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Login to Docker Hub
        uses: docker/login-action@v3 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
            # type=image,name=ghcr.io/${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          build-args: |
            BUILDTIME=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
            VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
            REVISION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
      
      - 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-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    name: Merge and Publish multiarch
    runs-on: ubuntu-latest
    needs:
      - build
    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: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          # list of Docker images to use as base name for tags
          images: |
            ghcr.io/${{ env.REGISTRY_IMAGE }}
            ${{ env.REGISTRY_IMAGE }}
          # generate Docker tags based on the following events/attributes
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
      
      - name: Login to ghcr.io
        uses: docker/login-action@v3 
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
          
      - name: Login to Docker Hub
        uses: docker/login-action@v3 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      
      - 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") \
            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)          
      
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}