name: Build image
on:
  push:
    tags:
      - 'v*'
jobs:
  build-image:
    container:
      image: catthehacker/ubuntu:act-latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@v4
        # Required for installing nix
      - name: Install sudo
        run: apt-get update && apt-get install -y sudo
      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          enable_kvm: false
      - name: Get image meta
        run: nix build .#image-meta -o image-meta
      - name: Version check
        run: |
          VERSION=$(cat image-meta/version)
          [ "$GITHUB_REF_NAME" = v"$VERSION" ]
      - name: Build image
        run: nix build .#image -o image.tar.gz
      - run: docker login -u paul -p "$PASSWORD" git.pbrinkmeier.de
        env:
          PASSWORD: "${{ secrets.REGISTRY_PASSWORD }}"
      - run: docker load < image.tar.gz
      - run: docker image push $(cat image-meta/name)