name: Build Test Docker Image

on:
  push:
    branches:
      - master
  workflow_dispatch:

permissions:
  contents: read
  packages: write

jobs:
  build-test:
    runs-on: ubuntu-24.04
    timeout-minutes: 30

    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        submodules: recursive

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

    - name: Login to GitHub Container Registry
      uses: docker/login-action@v6
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Build and push test image
      uses: docker/build-push-action@v6
      with:
        context: .
        push: true
        platforms: linux/amd64
        tags: ghcr.io/${{ github.repository }}:test
        cache-from: type=gha
        cache-to: type=gha,mode=max