nix-community.nixvim/plugins/statuslines/lightline.nix

{ pkgs, config, lib, ... }:
with lib;
let
  cfg = config.programs.nixvim.plugins.lightline;
  helpers = import ../helpers.nix { inherit lib; };
in {
  options = {
    programs.nixvim.plugins.lightline = {
      enable = mkEnableOption "Enable lightline";

      colorscheme = mkOption {
        type = with types; nullOr str;
        default = config.programs.nixvim.colorscheme;
        description = "The colorscheme to use for lightline. Defaults to .colorscheme.";
        example = "gruvbox";
      };

      componentFunction = mkOption {
        default = null;
        type = with types; nullOr (attrsOf str);
        description = ''
          A list of function component definitions.

          You should define the functions themselves in <para>extraConfig</para>
        '';
        example = ''
          programs.nixvim.plugins.lightline = {
            enable = true;
            componentFunction = {
              readonly = "LightlineReadonly";
            };

            extraConfig = '''
              function! LightlineReadonly()
                return &readonly && &filetype !=# 'help' ? 'RO' : '''
              endfunction
            ''';
          };
        '';
      };

      component = mkOption {
        default = null;
        type = with types; nullOr (attrsOf str);
        description = "Lightline component definitions. Uses 'statusline' syntax. Consult :h 'statusline' for a list of what's available.";
      };

      active = mkOption {
        default = null;
        type = types.nullOr (types.submodule {
          options = let
            listType = with types; nullOr (listOf (listOf str));
          in {
            left = mkOption {
              type = listType;
              description = "List of components that will show up on the left side of the bar";
              default = null;
            };

            right = mkOption {
              type = listType;
              description = "List of components that will show up on the right side of the bar";
              default = null;
            };
          };
        });
      };

      modeMap = mkOption {
        type = with types; nullOr (attrsOf str);
        description = "Mode name mappings";
        default = null;
      };
    };
  };

  config = let
    configAttrs = filterAttrs (_: v: v != null) {
      inherit (cfg) colorscheme active component componentFunction modeMap;
    };
  in mkIf cfg.enable {
    programs.nixvim = {
      extraPlugins = [ pkgs.vimPlugins.lightline-vim ];
      globals.lightline = mkIf (configAttrs != {}) configAttrs;
    };
  };
}