redo vim-with-plugins configuration

- executable name is vim too
- bundle a vimrc that just reads the ~/.vimrc for now
- use python3

home/config.nix

@@ -2,13 +2,22 @@ let
   lib = (import <nixpkgs> {}).lib;
 
 in
-{
+  {
 
     clementine.spotify = false;
     whitelistedLicenses = with lib.licenses; [ wtfpl ];
+    vim =
+      { gui = "gtk3";
+      python = true;
+      multibyteSupport = true;
+    };
+
     packageOverrides = pkgs: with pkgs;
-	let
+    rec {
-	myVimBundle = with pkgs.vimPlugins; {
+      myVim = (vim_configurable.override {python = python3;}).customize {
+            # executable/ package name
+            name = "vim";
+            vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
           # loaded on start
           start = [
             ale
@@ -23,14 +32,14 @@ in
             vim-nix
           ];
         };
-	in 
+		vimrcConfig.customRC = ''
-  	rec {
+          if filereadable($HOME . "/.vimrc")
-      # build with debug symbols and in debug mode (less optimized)
+            source ~/.vimrc
-	  myVim = vim_configurable.customize {
+          endif
-	    name = "vim-with-plugins";
+		  '';
-		vimrcConfig.packages.myVimPackage = myVimBundle;
       };
+      # build with debug symbols and in debug mode (less optimized)
       opencvDebug = enableDebugging ((opencv3.override {enablePython=true; enableGtk3=true; enableDocs=true; pythonPackages=pkgs.python3Packages; }).overrideAttrs (oldAttrs: rec {cmakeBuildType = "Debug";}));
     };
 
-}
+  }