docker_build.yml

name: Docker

# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

on:
  schedule:
    - cron: "22 21 * * *"
  push:
    branches: ["main"]
    # Publish semver tags as releases.
    tags: ["*.*.*"]
  pull_request:
    branches: ["main"]

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}
  COMPARE_TAG: latest

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      pull-requests: write
      security-events: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write
    outputs:
      tags: ${{ steps.meta.outputs.tags }}
      labels: ${{ steps.meta.outputs.labels }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@v3.7.0 # v3.1.1
        with:
          cosign-release: "v2.2.4"

      # Set up BuildKit Docker container builder to be able to build
      # multi-platform images and export cache
      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.8.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5.6.1
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=ref,event=branch
            type=ref,event=pr

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v6.12.0
        with:
          context: .
          push: true
          load: ${{ github.event_name == 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
            
      - name: Extract Docker metadata
        id: meta2
        uses: docker/metadata-action@v5.6.1
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
      
      - name: Build and push Docker image to Docker Hub
        id: build-and-push-docker
        uses: docker/build-push-action@v6.12.0
        with:
          context: .
          push: true
          tags: ${{ steps.meta2.outputs.tags }}
          labels: ${{ steps.meta2.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          provenance: mode=max


      - name: Docker Scout
        id: docker-scout
        uses: docker/scout-action@v1
        with:
          # command: cves,recommendations,compare
          command: compare
          image: ${{ steps.meta.outputs.tags }}
          to: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.COMPARE_TAG }}
          ignore-unchanged: false
          write-comment: true
          github-token: ${{ secrets.GITHUB_TOKEN }} # to be able to write the comment
          # sarif-file: docker-scout.sarif

      # - name: Upload analysis results to GitHub
      #   id: upload-sarif
      #   if: ${{ github.event_name != 'pull_request' }}
      #   uses: github/codeql-action/upload-sarif@v3
      #   with:
      #     sarif_file: docker-scout.sarif
      #     wait-for-processing: true

      # # Sign the resulting Docker image digest except on PRs.
      # # This will only write to the public Rekor transparency log when the Docker
      # # repository is public to avoid leaking data.  If you would like to publish
      # # transparency data even for private images, pass --force to cosign below.
      # # https://github.com/sigstore/cosign
      # - name: Sign the published Docker image
      #   if: ${{ github.event_name != 'pull_request' }}
      #   env:
      #     # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
      #     TAGS: ${{ steps.meta.outputs.tags }}
      #     DIGEST: ${{ steps.build-and-push.outputs.digest }}
      #   # This step uses the identity token to provision an ephemeral certificate
      #   # against the sigstore community Fulcio instance.
      #   run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}