neovim.tests: complete plug test

to check that it can correctly load the colorscheme

pkgs/applications/editors/neovim/tests.nix

@@ -87,10 +87,19 @@ rec {
   nvim_with_plug = neovim.override {
     extraName = "-with-plug";
     configure.plug.plugins = with pkgs.vimPlugins; [
-      vim-go
+      base16-vim
     ];
+    configure.customRC = ''
+      color base16-tomorrow-night
+      set background=dark
+    '';
   };
 
+  run_nvim_with_plug = runTest nvim_with_plug ''
+    export HOME=$TMPDIR
+    ${nvim_with_plug}/bin/nvim -i NONE -c 'color base16-tomorrow-night'  +quit!
+  '';
+
   # nixpkgs should detect that no wrapping is necessary
   nvimShouldntWrap = wrapNeovim2 "-should-not-wrap" nvimAutoDisableWrap;
 

pkgs/misc/vim-plugins/build-vim-plugin.nix

@@ -6,7 +6,7 @@
 
 rec {
   addRtp = path: attrs: derivation:
-    derivation // { rtp = "${derivation}/${path}"; } // {
+    derivation // { rtp = "${derivation}"; } // {
       overrideAttrs = f: buildVimPlugin (attrs // f attrs);
     };
 

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

@@ -295,7 +295,7 @@ let
       plugImpl =
       (''
         source ${vimPlugins.vim-plug.rtp}/plug.vim
-        call plug#begin('/dev/null')
+        silent! call plug#begin('/dev/null')
 
         '' + (lib.concatMapStringsSep "\n" (pkg: "Plug '${pkg.rtp}'") plug.plugins) + ''