whatsapp-rust 0.7.0

name: Docker

on:
  push:
    branches: [main]
    tags: ['v*']
  workflow_dispatch:
  # Called by release.yml: a v* tag it pushes with GITHUB_TOKEN can't trigger
  # the tag event above, so the release invokes this directly and passes the
  # version to tag the image with.
  workflow_call:
    inputs:
      version:
        description: 'Image version tag, e.g. 0.6.0 (set by the release workflow)'
        required: false
        type: string
        default: ''

# Native per-arch runners instead of QEMU: build-std + fat LTO is far too slow
# under emulation. Each arch builds in parallel, pushed by digest, then merged
# into one multi-arch manifest.
# event_name keys the group so a main push can't cancel a release's build.
concurrency:
  group: docker-${{ github.ref }}-${{ github.event_name }}
  cancel-in-progress: true

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-latest
          - platform: linux/arm64
            runner: ubuntu-24.04-arm
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
      packages: write
    steps:
      - name: Prepare platform pair
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> "$GITHUB_ENV"

      - uses: actions/checkout@v6

      - id: meta
        uses: docker/metadata-action@v6
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - uses: docker/setup-buildx-action@v4

      - uses: docker/login-action@v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          # Per-arch cache scope so the two matrix legs never clobber each other.
          cache-from: type=gha,scope=${{ env.PLATFORM_PAIR }}
          cache-to: type=gha,mode=max,scope=${{ env.PLATFORM_PAIR }}
          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true

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

      - name: Upload digest
        uses: actions/upload-artifact@v7
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: ${{ runner.temp }}/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@v8
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true

      - uses: docker/setup-buildx-action@v4

      - id: meta
        uses: docker/metadata-action@v6
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=semver,pattern={{version}}
            type=sha
            type=raw,value=latest,enable={{is_default_branch}}
            type=raw,value=${{ inputs.version }},enable=${{ inputs.version != '' }}

      - uses: docker/login-action@v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
        env:
          DOCKER_METADATA_OUTPUT_JSON: ${{ steps.meta.outputs.json }}

      - name: Inspect
        run: docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}