rose-pine-nix/modules/home-manager/fish.nix

{
  config,
  lib,
  ...
}:
let
  inherit (config.rose-pine) sources;

  cfg = config.programs.fish.rose-pine;
  enable = cfg.enable && config.programs.fish.enable;

  themeName = "Rosé Pine ${lib.rp.mkUpper (lib.rp.getFlavor cfg.flavor)}";
  themePath = "/themes/${themeName}.theme";
in
{
  options.programs.fish.rose-pine = lib.rp.mkRosePineOpt { name = "fish"; };

  config = lib.mkIf enable {
    xdg.configFile."fish${themePath}".source = "${sources.fish}${themePath}";

    programs.fish.shellInit = ''
      fish_config theme choose "${themeName}"
    '';
  };
}