make vscode's configuration file writable at runtime

home-manager/vscode.nix

@@ -1,7 +1,26 @@
-{ pkgs, system, inputs, ... }: {
+{ pkgs, config, system, inputs, ... }: rec {
+
+  # Make VSCode config writable
+  # https://github.com/nix-community/home-manager/issues/1800#issuecomment-2262881846
+  home.activation.makeVSCodeConfigWritable = let
+    configDirName = {
+      "vscode" = "Code";
+      "vscode-insiders" = "Code - Insiders";
+      "vscodium" = "VSCodium";
+    }.${programs.vscode.package.pname};
+    configPath = "${config.xdg.configHome}/${configDirName}/User/settings.json";
+  in {
+    after = [ "writeBoundary" ];
+    before = [ ];
+    data = ''
+      install -m 0640 "$(readlink ${configPath})" ${configPath}
+    '';
+  };
+
   programs.vscode = {
     enable = true;
-    #package = pkgs.vscode.fhsWithPackages (ps: [ ]);
+    package = pkgs.vscode.fhsWithPackages
+      (ps: with pkgs; [ dotnetCorePackages.sdk_8_0 mypy ]);
     extensions =
       with inputs.nix-vscode-extensions.extensions.${system}.vscode-marketplace;
       with inputs.nix-vscode-extensions.extensions.${system}.vscode-marketplace-release; [
@@ -140,6 +159,9 @@
         d-koppenhagen.file-tree-to-text-generator
       ];
     userSettings = {
+      "DO-NOT-EDIT-1" = "This file is managed by the Nix module located at `/etc/nixos/home-manager/vscode.nix`.";
+      "DO-NOT-EDIT-2" = "Changes will be overwritten when VSCode is restarted.";
+      "DO-NOT-EDIT-3" = "To persist changes, edit the module and run `upd` in your terminal.";
       "editor.tokenColorCustomizations" = {
         "[Catppuccin*]" = {
           "variables" = "#82eaf0";