nixos/starship: add presets

{ config, lib, pkgs, ... }:

with lib;

let

  cfg = config.programs.starship;

  settingsFormat = pkgs.formats.toml { };

  settingsFile = settingsFormat.generate "starship.toml" cfg.settings;

  userSettingsFile = settingsFormat.generate "starship.toml" cfg.settings;

  settingsFile = if cfg.presets == [] then userSettingsFile else pkgs.runCommand "starship.toml"

    {

      nativeBuildInputs = [ pkgs.yq ];

    } ''

    tomlq -s -t 'reduce .[] as $item ({}; . * $item)' \

      ${lib.concatStringsSep " " (map (f: "${pkgs.starship}/share/starship/presets/${f}.toml") cfg.presets)} \

      ${userSettingsFile} \

      > $out

  '';

  initOption =

    if cfg.interactiveOnly then

in

{

  options.programs.starship = {

    enable = mkEnableOption (lib.mdDoc "the Starship shell prompt");

    enable = lib.mkEnableOption (lib.mdDoc "the Starship shell prompt");

    interactiveOnly = mkOption {

    interactiveOnly = lib.mkOption {

      default = true;

      example = false;

      type = types.bool;

      type = lib.types.bool;

      description = lib.mdDoc ''

        Whether to enable starship only when the shell is interactive.

        Some plugins require this to be set to false to function correctly.

      '';

    };

    settings = mkOption {

    presets = lib.mkOption {

      default = [ ];

      example = [ "nerd-font-symbols" ];

      type = with lib.types; listOf str;

      description = lib.mdDoc ''

        Presets files to be merged with settings in order.

      '';

    };

    settings = lib.mkOption {

      inherit (settingsFormat) type;

      default = { };

      description = lib.mdDoc ''

    };

  };

  config = mkIf cfg.enable {

  config = lib.mkIf cfg.enable {

    programs.bash.${initOption} = ''

      if [[ $TERM != "dumb" ]]; then

        # don't set STARSHIP_CONFIG automatically if there's a user-specified