Add cmp.nix

home-manager/common/software/cli/nixvim/cmp.nix

@@ -0,0 +1,69 @@
+{ ... }: {
+  nixvim.plugins = {
+    # Snippet engine for neovim
+    luasnip.enable = true;
+    cmp_luasnip.enable = true;
+    # CMP  Addons
+    cmp-buffer.enable = true;
+    cmp-path.enable = true;
+    cmp-nvim-lsp.enable = true;
+    cmp-nvim-lsp-document-symbol.enable = true;
+    cmp-nvim-lsp-signature-help.enable = true;
+
+    nvim-cmp = {
+      enable = true;
+      autoEnableSources = true;
+      mapping = {
+        "<C-Space>" = "cmp.mapping.complete()";
+        "<C-d>" = "cmp.mapping.scroll_docs(-4)";
+        "<C-e>" = "cmp.mapping.close()";
+        "<C-f>" = "cmp.mapping.scroll_docs(4)";
+        "<CR>" = "cmp.mapping.confirm({ select = true })";
+        "<S-Tab>" = {
+          action = "cmp.mapping.select_prev_item()";
+          modes = [
+          "i"
+          "s"
+          ];
+        };
+        "<Tab>" = {
+          action = "cmp.mapping.select_next_item()";
+          modes = [
+          "i"
+          "s"
+          ];
+        };
+      };
+      sources = [
+#          { name = "nvim_lua"; }
+        { name = "nvim_lsp"; }
+#          { name = "nvim_lsp_signature_help"; }
+        { name = "calc"; }
+        { name = "path"; }
+        { name = "buffer"; }
+        { name = "luasnip"; }
+      ];
+        snippet.expand = "luasnip";
+        window = {
+          completion.border = "rounded"; 
+          documentation.border = "rounded";
+        };
+        formatting = {
+          fields = [ "menu" "abbr" "kind" ];
+          # https://rsdlt.github.io/posts/rust-nvim-ide-guide-walkthrough-development-debug/
+          format = ''
+            function(entry, item)
+              local menu_icon = {
+                  nvim_lsp = 'λ',
+                  luasnip = '⋗',
+                  buffer = 'Ω',
+                  path = '🖫',
+              }
+              item.menu = menu_icon[entry.source.name]
+              return item
+            end,
+          '';
+      };
+    };
+  };
+}