basic gitgutter

plugins/default.nix

@@ -1,7 +1,10 @@
 {
   imports = [
+    ./colorschemes/gruvbox.nix
+
     ./statuslines/lightline.nix
     ./statuslines/airline.nix
-    ./colorschemes/gruvbox.nix
+
+    ./git/gitgutter.nix
   ];
 }

plugins/git/gitgutter.nix

@@ -0,0 +1,89 @@
+{ pkgs, config, lib, ... }:
+with lib;
+let
+  cfg = config.programs.nixvim.plugins.gitgutter;
+  helpers = import ../helpers.nix { inherit lib; };
+in {
+  options = {
+    programs.nixvim.plugins.gitgutter = {
+      enable = mkEnableOption "Enable gitgutter";
+
+      recommendedSettings = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Use recommended settings";
+      };
+
+      maxSigns = mkOption {
+        type = types.nullOr types.int;
+        default = null;
+        description = "Maximum number of signs to show on the screen. Unlimited by default.";
+      };
+
+      showMessageOnHunkJumping = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Show a message when jumping between hunks";
+      };
+
+      defaultMaps = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Let gitgutter set default mappings";
+      };
+
+      allowClobberSigns = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Don't preserve other signs on the sign column";
+      };
+
+      signPriority = mkOption {
+        type = types.nullOr types.int;
+        default = null;
+        description = "GitGutter's sign priority on the sign column";
+      };
+
+      matchBackgrounds = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Make the background colors match the sign column";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    programs.nixvim = {
+      extraPlugins = [ pkgs.vimPlugins.gitgutter ];
+
+      options = mkIf cfg.recommendedSettings {
+        updatetime = 100;
+        foldtext = "gitgutter#fold#foldtext";
+      };
+
+      globals = {
+        gitgutter_max_signs = mkIf (!isNull cfg.maxSigns) cfg.maxSigns;
+        gitgutter_show_msg_on_hunk_jumping = mkIf (!cfg.showMessageOnHunkJumping) 0;
+        gitgutter_map_keys = mkIf (!cfg.defaultMaps) 0;
+        gitgutter_sign_allow_clobber = mkIf (cfg.allowClobberSigns) 1;
+        gitgutter_sign_priority = mkIf (!isNull cfg.signPriority) cfg.signPriority;
+        gitgutter_set_sign_backgrounds = mkIf (cfg.matchBackgrounds) 1;
+
+        # TODO these config options:
+        # gitgutter_sign_*
+        # gitgutter_diff_relative_to
+        # gitgutter_diff_base
+        # gitgutter_git_args
+        # gitgutter_diff_args
+        # gitgutter_grep
+        # gitgutter_enabled
+        # gitgutter_signs
+        # gitgutter_highlight_lines
+        # gitgutter_highlight_linenrs
+        # gitgutter_async
+        # gitgutter_preview_win_floating
+        # gitgutter_use_location_list
+      };
+    };
+  };
+}