Add infrastruture: vimProfile

nixos/modules/module-list.nix

@@ -384,3 +384,4 @@
   ./virtualisation/virtualbox-guest.nix
   #./virtualisation/xen-dom0.nix
 ]
+++ import ./nixuser-module-list.nix

nixos/modules/nixuser-module-list.nix

@@ -0,0 +1,4 @@
+[
+ # modules that are used in nixos and nixuser
+ ./programs/vim/default.nix
+]

nixos/modules/programs/vim/completion.nix

@@ -0,0 +1,76 @@
+{pkgs,...}:
+{
+  ###### interface
+  options = {
+    forward = {
+      default = "<TAB>";
+      description = "Keymap to trigger completion, and to cycle in forward direction.";
+    };
+
+    backward = {
+      default = "<S-TAB>";
+      description = "Keymap to cycle in backward direction.";
+    };
+
+    literal = {
+      default = "<C-TAB>";
+      description = "Keymap to insert a literal TAB.";
+    };
+
+    listSnippets = {
+      default = "<C-S-TAB>";
+      description = "Keymap to list all snippets of UltiSnip.";
+    };
+
+    force = {
+      default = "<C-Space>";
+      description = "Keymap to invoce semantic completion of YouCompleteMe.";
+    };
+  };
+
+
+  ###### implementation
+  vimrc = cfg: if !(isNull cfg.forward) || !(isNull cfg.backward)
+    then ''
+      " trigger supertab mapping
+      let g:SuperTabMappingForward = '${cfg.forward}'
+      let g:SuperTabMappingBackward = '${cfg.backward}'
+
+      " tune supertab
+      let g:SuperTabRetainCompletionDuration = 'completion'
+      let g:SuperTabNoCompleteBefore = ['\t']
+      let g:SuperTabNoCompleteAfter = ['^', '\s', '\t']
+      let g:SuperTabClosePreviewOnPopupClose = 1
+      " literal tab
+      ''
+      + (if (isNull cfg.literal) then "" else "let g:SuperTabMappingTabLiteral = '${cfg.literal}'") +
+      ''
+      " enable next-longest matching support
+      let g:SuperTabLongestEnhanced = 1
+
+      " couple supertab to YCM
+      let g:SuperTabDefaultCompletionType = '<C-p>'
+      let g:ycm_key_list_select_completion = ['<C-n>']
+      let g:ycm_key_list_previous_completion = ['<C-p>']
+      let g:ycm_key_invoke_completion = '${if isNull cfg.force then "" else cfg.force}'
+
+      " match ultisnips
+      let g:UltiSnipsExpandTrigger = '${cfg.forward}'
+      let g:UltiSnipsJumpForwardTrigger = '${cfg.forward}'
+      let g:UltiSnipsJumpBackwardTrigger = '${cfg.backward}'
+
+      " config YCM
+      let g:ycm_seed_identifiers_with_syntax = 1
+      " ctags needs to be called with --fields=+l, and tagsfiles come from tagfiles()
+      let g:ycm_collect_identifiers_from_tags_files = 1
+      let g:ycm_autoclose_preview_window_after_completion = 1
+      let g:ycm_autoclose_preview_window_after_insertion = 1
+      ''
+      + (if (isNull cfg.listSnippets) then "" else "let g:UltiSnipsListSnippets = '${cfg.listSnippets}'")
+    else "";
+
+  plugins = [ "supertab" "YouCompleteMe" "ultisnips" ];
+
+  paths = [ pkgs.python ];
+}
+