name: Container Image

on:
  pull_request:
    paths:
      - Dockerfile
      - package.json
      - package-lock.json
      - tsconfig.json
      - integrity-check.cjs
      - src/**
      - public/**
      - licensed/**
      - scripts/**
      - .github/workflows/image.yml
  push:
    branches:
      - main
    tags:
      - v*
  workflow_dispatch:

permissions:
  contents: read
  packages: write

concurrency:
  group: image-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  docker:
    name: Build container image
    runs-on: ubuntu-latest
    timeout-minutes: 45
    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Prepare licensed assets
        run: node ./scripts/prepare-licensed-assets.cjs

      - name: Derive image name
        id: vars
        run: echo "image_name=ghcr.io/${GITHUB_REPOSITORY,,}" >> "$GITHUB_OUTPUT"

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

      - name: Extract image metadata
        id: meta
        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
        with:
          images: ${{ steps.vars.outputs.image_name }}
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=sha,prefix=sha-
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Log in to GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and optionally publish image
        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
        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