<aspect>.<class> transposition for Dendritic Nix#

flake.aspects { foo = { nixos = ...; }; bar = { nixos = ...; darwin = ...; }; baz = { darwin = ...; }; }

flake.modules { nixos = { foo = ...; bar = ...; }; darwin = { bar = ...; baz = ...; }; }

Motivation#

On Dendritic setups it is common to expose modules using flake.modules.<class>.<aspect> - see aspect-oriented nix configurations.

However, for humans, it might be more intuitive to use a transposed attrset <aspect>.<class>. Because it feels more natural to nest classes on aspects than the other way around.

Usage#

As a deps-free library from ./default.nix:

let transpose = import ./default.nix { lib = pkgs.lib; }; in
transpose { a.b.c = 1; } # => { b.a.c = 1; }

As a Dendritic flake-parts module that provides the flake.aspects option:

flake.aspects transposes into flake.modules.

{ inputs, ... }: {
  imports = [ inputs.flake-aspects.flakeModule ];
  flake.aspects.sliding-desktop = {
    nixos = { ... }; # configure Niri
    darwin = { ... }; # configure Paneru
  };
}

Testing#

nix run ./checkmate#fmt --override-input target .
nix flake check ./checkmate --override-input target . -L