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: '35 13 * * *'
  push:
    branches: [ "main" ]
    # Publish semver tags as releases.
    tags: [ 'v*.*.*' ]
  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 }}


jobs:
  build:

    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write

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

      # 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@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
        with:
          cosign-release: 'v2.1.1'

      # 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@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_PAT }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      # 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@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
      #   with:
      #     context: ./docker
      #     push: ${{ 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: Docker Buildx Bake
        # You may pin to the exact commit or the version.
        # uses: docker/bake-action@511fde2517761e303af548ec9e0ea74a8a100112
        uses: docker/bake-action@v4.0.0
        with:
          # Builder instance
          #builder: # optional
          # List of bake definition files
          files: docker-compose.yaml
          # Working directory of bake execution
          #workdir: # optional, default is .
          # List of bake targets
          targets: my_example # optional
          # Do not use cache when building the image
          #no-cache: # optional, default is false
          # Always attempt to pull a newer version of the image
          #pull: # optional, default is false
          # Load is a shorthand for --set=*.output=type=docker
          #load: # optional, default is false
          # Provenance is a shorthand for --set=*.attest=type=provenance
          #provenance: # optional
          # Push is a shorthand for --set=*.output=type=registry
          push: true # optional, default is false
          # SBOM is a shorthand for --set=*.attest=type=sbom
          sbom: true # optional
          # List of targets values to override (eg. targetpattern.key=value)
          #set: # optional
          # Remote bake definition to build from
          #source: # optional

      # 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}