variables:
  # latest | latest-cachix | latest-attic etc.
  NIX_CI_IMAGE_TAG: latest

stages:
  - build
  - trigger

nix-ci:build:
  stage: build
  image: registry.gitlab.com/technofab/nix-gitlab-ci/nix-ci:${NIX_CI_IMAGE_TAG}
  script:
    # build the generated-gitlab-ci.yml
    - nix build .#gitlab-ci-config
    - install result generated-gitlab-ci.yml
  after_script:
    # upload to binary cache
    - echo $(nix-store --query --references result)
    # TODO: upload deps using cachix or attic
  artifacts:
    paths:
      - generated-gitlab-ci.yml

nix-ci:trigger:
  stage: trigger
  needs:
    - nix-ci:build
  trigger:
    include:
      - artifact: generated-gitlab-ci.yml
        job: nix-ci:build
    strategy: depend