feat: enable vim-vsnip if nvim-cmp is enabled

modules/completion/nvim-cmp/config.nix

@@ -35,6 +35,7 @@ in {
       "cmp-buffer"
       "cmp-vsnip"
       "cmp-path"
+      "vim-vsnip"
     ];
 
     vim.autocomplete.sources = {

modules/completion/nvim-cmp/nvim-cmp.nix

@@ -5,7 +5,30 @@
   ...
 }:
 with lib;
-with builtins; {
+with builtins; let
+  cfg = config.vim.autocomplete;
+  lspkindEnabled = config.vim.lsp.enable && config.vim.lsp.lspkind.enable;
+  builtSources =
+    concatMapStringsSep
+    "\n"
+    (n: "{ name = '${n}'},")
+    (attrNames cfg.sources);
+
+  builtMaps =
+    concatStringsSep
+    "\n"
+    (mapAttrsToList
+      (n: v:
+        if v == null
+        then ""
+        else "${n} = '${v}',")
+      cfg.sources);
+
+  dagPlacement =
+    if lspkindEnabled
+    then nvim.dag.entryAfter ["lspkind"]
+    else nvim.dag.entryAnywhere;
+in {
   options.vim = {
     autocomplete = {
       enable = mkOption {