name: Publish Docker Images

on:
  release:
    types:
      - published
  workflow_dispatch:
    inputs:
      tag:
        description: "The tag version you want to build"

env:
  REGISTRY_IMAGE: ghcr.io/sagernet/sing-box

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: true
      matrix:
        platform:
          - linux/amd64
          - linux/arm/v6
          - linux/arm/v7
          - linux/arm64
          - linux/386
          - linux/ppc64le
          - linux/riscv64
          - linux/s390x
    steps:
      - name: Get commit to build
        id: ref
        run: |-
          if [[ -z "${{ github.event.inputs.tag }}" ]]; then
            ref="${{ github.ref_name }}"
          else
            ref="${{ github.event.inputs.tag }}"
          fi
          echo "ref=$ref"
          echo "ref=$ref" >> $GITHUB_OUTPUT
      - name: Checkout
        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
        with:
          ref: ${{ steps.ref.outputs.ref }}
          fetch-depth: 0
      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v3
      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY_IMAGE }}
      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          context: .
          build-args: |
            BUILDKIT_CONTEXT_KEEP_GIT_DIR=1
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},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-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1
  merge:
    runs-on: ubuntu-latest
    needs:
      - build
    steps:
      - name: Get commit to build
        id: ref
        run: |-
          if [[ -z "${{ github.event.inputs.tag }}" ]]; then
            ref="${{ github.ref_name }}"
          else
            ref="${{ github.event.inputs.tag }}"
          fi
          echo "ref=$ref"
          echo "ref=$ref" >> $GITHUB_OUTPUT
          if [[ $ref == *"-"* ]]; then
            latest=latest-beta
          else
            latest=latest
          fi
          echo "latest=$latest"
          echo "latest=$latest" >> $GITHUB_OUTPUT
      - 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: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            -t "${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.latest }}" \
            -t "${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.ref }}" \
            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.latest }}
          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.ref }}
