helix: configure languages + editor

home/helix/default.nix

@@ -1,5 +1,6 @@
 {...}: {
   imports = [
+    ./languages.nix
     ./themes/catppuccin_mocha.nix
   ];
   programs.helix = {
@@ -7,9 +8,25 @@
     settings = {
       theme = "catppuccin_mocha";
       editor = {
+        auto-save = true;
         true-color = true;
         color-modes = true;
         cursorline = true;
+        completion-replace = true;
+        soft-wrap.enable = true;
+        idle-timeout = 1;
+        gutters = ["diff" "diagnostics" "line-numbers" "spacer"];
+        statusline = {
+          left = ["mode" "spinner"];
+          center = ["file-name"];
+          right = ["diagnostics" "selections" "position" "file-line-ending" "file-type" "version-control"];
+          separator = "|";
+          mode = {
+            normal = "NORMAL";
+            insert = "INSERT";
+            select = "SELECT";
+          };
+        };
         cursor-shape = {
           insert = "bar";
           normal = "block";
@@ -18,37 +35,20 @@
         indent-guides = {
           render = true;
           rainbow = "dim";
-
-          languages = [
-            {
-              name = "nix";
-              auto-format = true;
-            }
-            {
-              name = "rust";
-            }
-            {
-              name = "go";
-            }
-            {
-              name = "lua";
-            }
-            {
-              name = "python";
-            }
-            {
-              name = "markdown";
-            }
-            {
-              name = "html";
-            }
-            {
-              name = "css";
-            }
-            {
-              name = "yaml";
-            }
-          ];
+          character = "┆";
+        };
+        whitespace = {
+          characters = {
+            space = "·";
+            nbsp = "⍽";
+            tab = "→";
+            newline = "⏎";
+            tabpad = "·";
+          };
+        };
+        lsp = {
+          display-messages = true;
+          display-inlay-hints = true;
         };
       };
     };

home/helix/languages.nix

@@ -0,0 +1,34 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  programs.helix.languages = {
+    language = with pkgs; [
+      {
+        name = "nix";
+        auto-format = true;
+        formatter = {
+          command = lib.getExe alejandra;
+          args = ["-q"];
+        };
+      }
+      {
+        name = "rust";
+        auto-format = true;
+        formatter = {
+          command = lib.getExe rustfmt;
+        };
+      }
+    ];
+    language-server = with pkgs; {
+      nil = {
+        command = lib.getExe nil;
+      };
+      vscode-css-language-server = {
+        command = "${nodePackages.vscode-css-languageserver-bin}/bin/css-languageserver";
+        args = ["--stdio"];
+      };
+    };
+  };
+}