image: nixos/nix:latest

variables:
  NIX_PATH: "nixpkgs=channel:nixos-unstable"
  GIT_STRATEGY: clone
  GIT_DEPTH: 1


stages:
  - "Update"
  - "Checks"

"Update inputs":
  stage: "Update"
  rules:
  - if: $CI_PIPELINE_SOURCE == "schedule"
  script:
    - git clone https://${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git
    - cd wallpapers
    - git config --global user.email "${GIT_USER_EMAIL:-$GITLAB_USER_EMAIL}"
    - git config --global user.name "${GIT_USER_NAME:-$GITLAB_USER_NAME}"
    - nix --extra-experimental-features "nix-command flakes" flake update --commit-lock-file
    - nix --extra-experimental-features "nix-command flakes" flake check
    - git push https://${CI_PROJECT_NAMESPACE}:${CI_JOB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git "${CI_DEFAULT_BRANCH}" -o ci.skip || echo "No changes to commit"

"Check formatting":
  rules:
    - if: $CI_PIPELINE_SOURCE == "push"
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
  stage: "Checks"
  script:
    - nix --extra-experimental-features "nix-command flakes" fmt -- -c .

"Check evaluation":
  rules:
    - if: $CI_PIPELINE_SOURCE == "push"
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
  stage: "Checks"
  script:
    - nix --extra-experimental-features "nix-command flakes" flake check