name: Artifacts

on:
  push:
    branches:
      - master
    tags:
      - v[0-9]+.[0-9]+.[0-9]+
  pull_request:

jobs:
  container-images:
    name: Container images
    runs-on: ubuntu-latest
    strategy:
      matrix:
        variant:
          - alpine
          - distroless

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Gather metadata
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            ghcr.io/dexidp/dex
            dexidp/dex
          flavor: |
            latest = false
          tags: |
            type=ref,event=branch,enable=${{ matrix.variant == 'alpine' }}
            type=ref,event=pr,enable=${{ matrix.variant == 'alpine' }}
            type=semver,pattern={{raw}},enable=${{ matrix.variant == 'alpine' }}
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) && matrix.variant == 'alpine' }}
            type=ref,event=branch,suffix=-${{ matrix.variant }}
            type=ref,event=pr,suffix=-${{ matrix.variant }}
            type=semver,pattern={{raw}},suffix=-${{ matrix.variant }}
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }},suffix=-${{ matrix.variant }}
          labels: |
            org.opencontainers.image.documentation=https://dexidp.io/docs/

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
        with:
          platforms: all

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ github.token }}
        if: github.event_name == 'push'

      - name: Login to Docker Hub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
        if: github.event_name == 'push'

      - name: Build and push
        uses: docker/build-push-action@v3
        with:
          context: .
          platforms: linux/amd64,linux/arm/v7,linux/arm64
          # cache-from: type=gha
          # cache-to: type=gha,mode=max
          push: ${{ github.event_name == 'push' }}
          tags: ${{ steps.meta.outputs.tags }}
          build-args: |
            BASE_IMAGE=${{ matrix.variant }}
            VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
            COMMIT_HASH=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.revision'] }}
            BUILD_DATE=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@0.2.5
        with:
          image-ref: "ghcr.io/dexidp/dex:${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}"
          format: "sarif"
          output: "trivy-results.sarif"
        if: github.event_name == 'push'

      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@v2
        with:
          sarif_file: "trivy-results.sarif"
        if: github.event_name == 'push'