name: Publish Docker Hub image

on:
  push:
    tags:
      - "v*.*.*"

permissions:
  contents: read

env:
  IMAGE_NAME: gxmandppx/nodeflare

concurrency:
  group: docker-hub-${{ github.ref }}
  cancel-in-progress: false

jobs:
  metadata:
    name: Resolve image tags
    runs-on: ubuntu-latest
    timeout-minutes: 5
    outputs:
      version: ${{ steps.version.outputs.version }}
      tags: ${{ steps.version.outputs.tags }}
      rust_image: ${{ steps.base_images.outputs.rust_image }}
      alpine_image: ${{ steps.base_images.outputs.alpine_image }}
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - name: Resolve version and tags
        id: version
        shell: bash
        env:
          NODEFLARE_VERSION: ${{ github.ref_name }}
        run: |
          set -euo pipefail
          version=$(sh scripts/resolve-version.sh)
          printf 'version=%s\ntags=%s,latest,sha-%.12s\n' "$version" "$version" "$GITHUB_SHA" >> "$GITHUB_OUTPUT"
      - name: Log in to Docker Hub
        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          username: ${{ vars.DOCKER_USERNAME || secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
      - name: Resolve latest stable base images
        id: base_images
        shell: bash
        run: |
          set -euo pipefail
          # Resolve once so both architectures and the test/push builds use the same images.
          for item in rust_image=rust:1-alpine alpine_image=alpine:latest; do
            key=${item%%=*}
            image=${item#*=}
            digest=$(docker buildx imagetools inspect "$image" --format '{{json .Manifest}}' | jq -er '.digest')
            if [[ ! "$digest" =~ ^sha256:[a-f0-9]{64}$ ]]; then
              echo "Invalid base image digest for $image" >&2
              exit 1
            fi
            printf '%s=%s@%s\n' "$key" "$image" "$digest" >> "$GITHUB_OUTPUT"
          done

  build:
    name: Build and verify (${{ matrix.arch }})
    needs: metadata
    runs-on: ${{ matrix.runner }}
    timeout-minutes: 60
    strategy:
      fail-fast: false
      matrix:
        include:
          - arch: amd64
            runner: ubuntu-latest
          - arch: arm64
            runner: ubuntu-24.04-arm
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - name: Log in to Docker Hub
        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          username: ${{ vars.DOCKER_USERNAME || secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
      - name: Build image for smoke test
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
        with:
          context: .
          platforms: linux/${{ matrix.arch }}
          build-args: |
            NODEFLARE_VERSION=${{ needs.metadata.outputs.version }}
            RUST_IMAGE=${{ needs.metadata.outputs.rust_image }}
            ALPINE_IMAGE=${{ needs.metadata.outputs.alpine_image }}
          tags: nodeflare:smoke
          load: true
          provenance: false
          cache-from: type=gha,scope=nodeflare-${{ matrix.arch }}
      - name: Verify version, startup and frontend assets
        env:
          NODEFLARE_VERSION: ${{ needs.metadata.outputs.version }}
        run: sh scripts/smoke-test-docker.sh nodeflare:smoke
      - name: Push verified image by digest
        id: push
        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
        with:
          context: .
          platforms: linux/${{ matrix.arch }}
          build-args: |
            NODEFLARE_VERSION=${{ needs.metadata.outputs.version }}
            RUST_IMAGE=${{ needs.metadata.outputs.rust_image }}
            ALPINE_IMAGE=${{ needs.metadata.outputs.alpine_image }}
          labels: |
            org.opencontainers.image.title=NodeFlare
            org.opencontainers.image.description=NodeFlare server with public and admin frontends
            org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.version=${{ needs.metadata.outputs.version }}
            org.opencontainers.image.licenses=MIT
          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
          provenance: true
          sbom: true
          cache-from: type=gha,scope=nodeflare-${{ matrix.arch }}
          cache-to: type=gha,mode=max,scope=nodeflare-${{ matrix.arch }}
      - name: Export image digest
        env:
          IMAGE_DIGEST: ${{ steps.push.outputs.digest }}
        run: |
          mkdir -p "$RUNNER_TEMP/nodeflare-digests"
          touch "$RUNNER_TEMP/nodeflare-digests/${IMAGE_DIGEST#sha256:}"
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: docker-digest-${{ matrix.arch }}
          path: ${{ runner.temp }}/nodeflare-digests/*
          if-no-files-found: error
          retention-days: 1

  publish:
    name: Publish multi-platform tags
    needs: [metadata, build]
    runs-on: ubuntu-latest
    timeout-minutes: 10
    env:
      IMAGE_TAGS: ${{ needs.metadata.outputs.tags }}
    steps:
      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          pattern: docker-digest-*
          path: ${{ runner.temp }}/nodeflare-digests
          merge-multiple: true
      - name: Log in to Docker Hub
        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          username: ${{ vars.DOCKER_USERNAME || secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4.3.0
      - name: Create and inspect image manifest
        shell: bash
        run: |
          set -euo pipefail
          IFS=, read -r -a tags <<< "$IMAGE_TAGS"
          tag_args=()
          for tag in "${tags[@]}"; do
            tag_args+=(--tag "$IMAGE_NAME:$tag")
          done
          digest_args=()
          for file in "$RUNNER_TEMP"/nodeflare-digests/*; do
            digest=${file##*/}
            if [[ ! "$digest" =~ ^[a-f0-9]{64}$ ]]; then
              echo "Invalid image digest artifact" >&2
              exit 1
            fi
            digest_args+=("$IMAGE_NAME@sha256:$digest")
          done
          if [ "${#digest_args[@]}" -ne 2 ]; then
            echo "Both amd64 and arm64 images are required before publishing tags" >&2
            exit 1
          fi
          docker buildx imagetools create "${tag_args[@]}" "${digest_args[@]}"
          docker buildx imagetools inspect "$IMAGE_NAME:${tags[0]}"