Xboard/.github/workflows/docker-publish.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:
  push:
    branches: [ "new" ]
    # Publish semver tags as releases.
  workflow_dispatch:  # Enable manual trigger

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
      - uses: satackey/action-docker-layer-caching@v0.0.11
        continue-on-error: true

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

      - name: Install cosign
        uses: sigstore/cosign-installer@v3.4.0
        with:
          cosign-release: 'v2.2.2'

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.2.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@v3.1.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5.5.1
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Get version
        id: get_version
        run: echo "version=$(git describe --tags --always)" >> $GITHUB_OUTPUT

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v5.3.0
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ env.REGISTRY }}/${{ github.repository_owner }}/xboard:new,${{ env.REGISTRY }}/${{ github.repository_owner }}/xboard,${{ env.REGISTRY }}/${{ github.repository_owner }}/xboard:${{ steps.get_version.outputs.version }}
      # 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
        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}