lib/deprecation: expose mkSettingsRenamedOptionModules publicly

Extracted the `optionsRenamedToSettings` implementation
from`mkVimPlugin` and `mkNeovimPlugin` into a new public helper.

lib/deprecation.nix

@@ -46,6 +46,18 @@ rec {
         '';
     };
 
+  mkSettingsRenamedOptionModules =
+    oldPrefix: newPrefix:
+    map (
+      option':
+      let
+        option = toList option';
+        oldPath = oldPrefix ++ option;
+        newPath = newPrefix ++ map nixvim.toSnakeCase option;
+      in
+      mkRenamedOptionModule oldPath newPath
+    );
+
   # A clone of types.coercedTo, but it prints a warning when oldType is used.
   transitionType =
     oldType: coerceFn: newType:

lib/helpers.nix

@@ -38,7 +38,12 @@ let
       byteCompileLuaDrv
       ;
 
-    inherit (helpers.deprecation) getOptionRecursive mkDeprecatedSubOptionModule transitionType;
+    inherit (helpers.deprecation)
+      getOptionRecursive
+      mkDeprecatedSubOptionModule
+      mkSettingsRenamedOptionModules
+      transitionType
+      ;
 
     inherit (helpers.options)
       defaultNullOpts

lib/neovim-plugin.nix

@@ -71,15 +71,7 @@ with lib;
         ++ (optional deprecateExtraOptions (
           mkRenamedOptionModule (basePluginPath ++ [ "extraOptions" ]) settingsPath
         ))
-        ++ (map (
-          option:
-          let
-            optionPath = if isString option then [ option ] else option; # option is already a path (i.e. a list)
-
-            optionPathSnakeCase = map helpers.toSnakeCase optionPath;
-          in
-          mkRenamedOptionModule (basePluginPath ++ optionPath) (settingsPath ++ optionPathSnakeCase)
-        ) optionsRenamedToSettings);
+        ++ (nixvim.mkSettingsRenamedOptionModules basePluginPath settingsPath optionsRenamedToSettings);
 
       options.${namespace}.${name} =
         {

lib/vim-plugin.nix

@@ -86,15 +86,7 @@ with lib;
         ++ (optional (deprecateExtraConfig && createSettingsOption) (
           mkRenamedOptionModule (basePluginPath ++ [ "extraConfig" ]) settingsPath
         ))
-        ++ (map (
-          option:
-          let
-            optionPath = if isString option then [ option ] else option; # option is already a path (i.e. a list)
-
-            optionPathSnakeCase = map helpers.toSnakeCase optionPath;
-          in
-          mkRenamedOptionModule (basePluginPath ++ optionPath) (settingsPath ++ optionPathSnakeCase)
-        ) optionsRenamedToSettings);
+        ++ (nixvim.mkSettingsRenamedOptionModules basePluginPath settingsPath optionsRenamedToSettings);
 
       config = mkIf cfg.enable (mkMerge [
         {