4.flake-parts/ChangeLog.md

2023-05-30

• Fix a strictness issue in perInput, affecting inputs', self'. This has caused infinite recursions and potentially performance issues since the introduction of these module arguments.

2023-05-08

• Add importApply for bringing variables from the flake scope into module files.

• Add mkDeferredModuleOption as a generic name for the implementation of mkPerSystemOption.

2023-03-26

• Add preliminary support for disabledModules for modules exposed via the importable flakeModules module. This requires a Nixpkgs of 2023-03-09 or newer.

2023-01-05

• Add importable easyOverlay module for defining an overlay "easily" by reusing perSystem. This is not for consuming overlays.

2022-12-25

• Added a new flake.flakeModules option so a flake can expose a module to be used in a downstream flake's flake-parts usage. .flakeModule is now an alias for .flakeModules.default.

  Option only available if flake-parts.flakeModules.flakeModules is imported.

2022-12-17

• The old syntax mkFlake { inherit self; } is now strongly discouraged in favor of:

  outputs = inputs@{ flake-parts, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } { /* module */ }
  

  This fixes an infinite recursion that occurs with the old syntax when using the inputs module argument in imports.

  If you're under the impression that this already worked, that's probably because you were using inputs from the lexical scope (ie directly from the flake outputs function arguments), rather than in a separate module file.

2022-12-07

• The darwinModules option has been removed. This was added in the early days without full consideration. The removal will have no effect on most flakes considering that the flake option allows any attribute to be set. This attribute and related attributes should be added to the nix-darwin project instead.

2022-10-11

• The nixpkgs input has been renamed to nixpkgs-lib to signify that the only dependency is on the lib attribute, which can be provided by either the nixpkgs?dir=lib subflake or by the nixpkgs flake itself.

• The templates now use the default, fixed nixpkgs?dir=lib dependency instead of a following nixpkgs dependency.

2022-05-25

• perSystem is not a functionTo submodule anymore, but a deferredModule, which is a lot like a regular submodule, but possible to invoke multiple times, for each system.

  All perSystem value definitions must remove the system: argument. If you need system to be in scope, use the one in the module arguments.

  -perSystem = system: { config, lib, ... }:
  +perSystem = { config, lib, system, ... }:
  

  All perSystem option declarations must now use flake-parts-lib.mkPerSystemOption.

  {
    options.perSystem = mkPerSystemOption ({ config, ... }: {
      options = {
        # ...
      };
      # ...
    });
  }
  

• flake-modules-core is now called flake-parts.

• flake.overlay has been removed in favor of flake.overlays.default.