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: "33 19 * * *"
    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@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
              with:
                  cosign-release: "v1.11.0"

            # Workaround: https://github.com/docker/build-push-action/issues/461
            - name: Setup Docker buildx
              uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf

            # 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@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
              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@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
              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@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
              with:
                  context: .
                  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