name: build from source

on:
  push:
    paths:
      - .github/workflows/build.yaml
      - build/*
  pull_request:
    paths:
      - .github/workflows/build.yaml
      - build/*
  workflow_dispatch:

permissions:
  contents: read
  packages: write
  security-events: write

env:
  GHCR_REPO: ghcr.io/trent-maetzold/protonmail-bridge

jobs:
  resolve-version:
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.resolve.outputs.version }}
    steps:
      - name: Get latest upstream release
        id: resolve
        run: |
          latest=$(curl -s https://api.github.com/repos/ProtonMail/proton-bridge/releases/latest | jq -r '.tag_name')
          echo "version=$latest" >> $GITHUB_OUTPUT

  test:
    runs-on: ubuntu-latest
    needs: resolve-version
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.GHCR_REPO }}

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

      - name: Build
        uses: docker/build-push-action@v6
        with:
          context: ./build
          file: ./build/Dockerfile
          load: true
          tags: "protonmail-bridge:test"
          build-args: |
            version=${{ needs.resolve-version.outputs.version }}

      - name: Run Trivy vulnerability scan
        continue-on-error: true
        run: |
          docker run --rm -v /var/run/docker.sock:/var/run/docker.sock \
            aquasec/trivy:latest image \
            --severity CRITICAL,HIGH \
            --exit-code 0 \
            protonmail-bridge:test

  build:
    runs-on: ubuntu-latest
    needs: resolve-version
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64/v8
          - linux/arm/v7
          - linux/riscv64
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.GHCR_REPO }}

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

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

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

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,"name=${{ env.GHCR_REPO }}",push-by-digest=true,name-canonical=true,push=true
          context: ./build
          file: ./build/Dockerfile
          provenance: false
          sbom: false
          build-args: |
            version=${{ needs.resolve-version.outputs.version }}

      - 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@v4
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs:
      - resolve-version
      - build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: network=host

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.GHCR_REPO }}
          tags: |
            type=raw,enable=true,value=${{ needs.resolve-version.outputs.version }}-build
            type=raw,enable=true,value=build
            type=raw,enable=true,value=latest

      - 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.GHCR_REPO }}@sha256:%s ' *)

      - name: Run Trivy vulnerability scan
        uses: aquasecurity/trivy-action@0.30.0
        with:
          image-ref: "${{ env.GHCR_REPO }}:${{ needs.resolve-version.outputs.version }}-build"
          format: 'sarif'
          exit-code: 0
          severity: 'CRITICAL,HIGH'
          output: 'trivy-results.sarif'

      - name: Upload Trivy scan SARIF report
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: 'trivy-results.sarif'

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.GHCR_REPO }}:${{ needs.resolve-version.outputs.version }}-build