name: Publish Docker Image

# 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: ["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

            # 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
            # https://github.com/docker/login-action
            - name: Log into registry ${{ env.REGISTRY }}
              uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
              with:
                  registry: ${{ env.REGISTRY }}
                  username: ${{ github.actor }}
                  password: ${{ secrets.GITHUB_TOKEN }}

            # 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: .
                  tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:main
                  cache-from: type=gha
                  cache-to: type=gha,mode=max