name: Build a docker image.

on: [push]

jobs:
  build-docker-image:
    runs-on: nixos

    steps:
      - name: Check out repository code
        uses: actions/checkout@v4

      - name: Build flake
        run: nix build .#docker

      - name: Load Docker image
        run: docker load < result

      - name: Login to local Gitea registry
        run: |
          echo "${{ secrets.GITEA_TOKEN }}" | \
            docker login ${{ gitea.server_url }} \
              --username "${{ gitea.actor }}" \
              --password-stdin

      - name: Tag image
        run: |
          docker tag my-image:latest \
            ${{ gitea.server_url }}/${{ gitea.repository }}:latest

      - name: Push image
        run: |
          docker push \
            ${{ gitea.server_url }}/${{ gitea.repository }}:latest