vimPlugins: shadow plugin builders in overrides.nix

We want to prevent plugins being added in `overrides.nix`. Shadow the
helper names to throw if someone tries to add them and use them in the
file.

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

pkgs/applications/editors/vim/plugins/default.nix

@@ -55,7 +55,6 @@ let
   # If additional modifications to the build process are required,
   # add to ./overrides.nix.
   overrides = callPackage ./overrides.nix {
-    inherit buildVimPlugin;
     inherit llvmPackages;
   };
 

pkgs/applications/editors/vim/plugins/overrides.nix

@@ -3,7 +3,6 @@
   stdenv,
   # nixpkgs functions
   buildGoModule,
-  buildVimPlugin,
   callPackage,
   fetchFromGitHub,
   fetchpatch,
@@ -131,6 +130,11 @@
 self: super:
 let
   luaPackages = neovim-unwrapped.lua.pkgs;
+
+  # Ensure the vim plugin builders are not used in this file.
+  # If they are used, these stubs will throw.
+  buildVimPlugin = throw "New plugin definitions should be done outside `overrides.nix`";
+  buildNeoVimPlugin = throw "New plugin definitions should be done outside `overrides.nix`";
 in
 {
   corePlugins = symlinkJoin {