neovim wrapper: also make <vimplugin>.pythonDepedencies a function

A function of the same signature as the argument of python.withPackages

pkgs/applications/editors/neovim/wrapper.nix

@@ -16,7 +16,7 @@ let
     , withPyGUI ? false
     , vimAlias ? false
     , viAlias ? false
-    , configure ? null
+    , configure ? {}
   }:
   let
 
@@ -35,18 +35,20 @@ let
   extraPythonPackagesFun = compatFun extraPythonPackages;
   extraPython3PackagesFun = compatFun extraPython3Packages;
 
-  pluginPythonPackages = if configure == null then [] else builtins.concatLists
-    (map ({ pythonDependencies ? [], ...}: pythonDependencies)
-         (vimUtils.requiredPlugins configure));
+  requiredPlugins = vimUtils.requiredPlugins configure;
+  getDeps = attrname: map (plugin: plugin.${attrname} or (_:[]));
+
+  pluginPythonPackages = getDeps "pythonDependencies" requiredPlugins;
   pythonEnv = pythonPackages.python.withPackages(ps:
         (if withPyGUI then [ ps.neovim_gui ] else [ ps.neovim ])
-        ++ (extraPythonPackagesFun ps) ++ pluginPythonPackages);
+        ++ (extraPythonPackagesFun ps)
+        ++ (concatMap (f: f ps) pluginPythonPackages));
 
-  pluginPython3Packages = if configure == null then [] else builtins.concatLists
-    (map ({ python3Dependencies ? [], ...}: python3Dependencies)
-         (vimUtils.requiredPlugins configure));
+  pluginPython3Packages = getDeps "python3Dependencies" requiredPlugins;
   python3Env = python3Packages.python.withPackages (ps:
-    [ ps.neovim ] ++ (extraPython3PackagesFun ps) ++ pluginPython3Packages);
+        [ ps.neovim ]
+        ++ (extraPython3PackagesFun ps)
+        ++ (concatMap (f: f ps) pluginPython3Packages));
 
   in
   stdenv.mkDerivation {
@@ -87,7 +89,7 @@ let
       ln -s $out/bin/nvim $out/bin/vim
     '' + optionalString viAlias ''
       ln -s $out/bin/nvim $out/bin/vi
-    '' + optionalString (configure != null) ''
+    '' + optionalString (configure != {}) ''
     wrapProgram $out/bin/nvim --add-flags "-u ${vimUtils.vimrcFile configure}"
     ''
     ;

pkgs/misc/vim-plugins/default.nix

@@ -1015,7 +1015,7 @@ let
       sha256 = "03sr53680kcwxaa5xbqzdfbsgday3bkzja33wym49w9gjmlaa320";
     };
     dependencies = ["vimproc" "vimshell" "self" "forms"];
-    pythonDependencies = with pythonPackages; [ sexpdata websocket_client ];
+    passthru.python3Dependencies = ps: with ps; [ sexpdata websocket_client ];
   };
 
   supertab = buildVimPluginFrom2Nix { # created by nix#NixDerivation

pkgs/misc/vim-plugins/vim-utils.nix

@@ -280,6 +280,7 @@ let
             installPhase = lib.concatStringsSep
                              "\n"
                              (lib.flatten (lib.mapAttrsToList packageLinks packages));
+            preferLocalBuild = true;
           }
         );
       in
@@ -423,6 +424,7 @@ rec {
   } // a);
 
   requiredPlugins = {
+    packages ? {},
     givenKnownPlugins ? null,
     vam ? null,
     pathogen ? null, ...
@@ -437,8 +439,12 @@ rec {
       vamNames = findDependenciesRecursively { inherit knownPlugins; names = lib.concatMap toNames vam.pluginDictionaries; };
       names = (lib.optionals (pathogen != null) pathogenNames) ++
               (lib.optionals (vam != null) vamNames);
+      nonNativePlugins = map (name: knownPlugins.${name}) names;
+      nativePluginsConfigs = lib.attrsets.attrValues packages;
+      nativePlugins = lib.concatMap ({start?[], opt?[]}: start++opt) nativePluginsConfigs;
     in
-      map (name: knownPlugins.${name}) names;
+      nativePlugins ++ nonNativePlugins;
+
 
   # test cases:
   test_vim_with_vim_addon_nix_using_vam = vim_configurable.customize {

pkgs/misc/vim-plugins/vim2nix/additional-nix-code/ensime-vim

@@ -1 +1 @@
-    pythonDependencies = with pythonPackages; [ sexpdata websocket_client ];
+    passthru.python3Dependencies = ps: with ps; [ sexpdata websocket_client ];