OpenFlare/.github/workflows/docker-image.yml

name: Docker image builds

on:
  workflow_dispatch:
  push:
    branches:
      - "dev"
    tags: ["v*"]

permissions:
  contents: read
  packages: write
  attestations: write
  id-token: write

jobs:
  build:
    name: Build (${{ matrix.arch }})
    strategy:
      fail-fast: false
      matrix:
        include:
          - arch: amd64
            platform: linux/amd64
            runner: ubuntu-24.04
          - arch: arm64
            platform: linux/arm64
            runner: ubuntu-24.04-arm
    runs-on: ${{ matrix.runner }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-tags: true
          fetch-depth: 0
          persist-credentials: false

      - name: Set image metadata
        shell: bash
        run: |
          echo "IMAGE=ghcr.io/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
          echo "VERSION=$(git describe --tags)" >> "$GITHUB_ENV"

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

      - name: Log into registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        id: build
        uses: docker/build-push-action@v6
        with:
          context: ./atsf_server
          file: ./atsf_server/Dockerfile
          platforms: ${{ matrix.platform }}
          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
          build-args: |
            VERSION=${{ env.VERSION }}
          cache-from: type=gha,scope=docker-${{ matrix.arch }}
          cache-to: type=gha,mode=max,scope=docker-${{ matrix.arch }}

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

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

      - name: Generate artifact attestation
        uses: actions/attest-build-provenance@v3
        with:
          subject-name: ${{ env.IMAGE }}
          subject-digest: ${{ steps.build.outputs.digest }}
          push-to-registry: true

  merge:
    name: Merge multi-arch manifest
    runs-on: ubuntu-24.04
    needs: build
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-tags: true
          fetch-depth: 0
          persist-credentials: false

      - name: Set image metadata
        shell: bash
        run: |
          echo "IMAGE=ghcr.io/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
          echo "VERSION=$(git describe --tags)" >> "$GITHUB_ENV"

      - 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 into registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Create and push manifest list
        working-directory: /tmp/digests
        shell: bash
        run: |
          shopt -s nullglob
          references=()
          for digest in *; do
            references+=("${IMAGE}@sha256:${digest}")
          done

          if [ ${#references[@]} -eq 0 ]; then
            echo "No digests found in /tmp/digests" >&2
            exit 1
          fi

          docker buildx imagetools create \
            -t "${IMAGE}:${VERSION}" \
            -t "${IMAGE}:latest" \
            "${references[@]}"

      - name: Inspect image
        run: docker buildx imagetools inspect "${IMAGE}:${VERSION}"