npm packages and ulimit

modules/darwin/npm.nix

@@ -0,0 +1,29 @@
+{ lib, pkgs }:
+
+let
+  npmPackages = [
+    "@enact/cli"
+    "@webos-tools/cli"
+    "patch-package"
+  ];
+in
+lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+  # Ensure required npm CLI tools are installed in the user prefix.
+  NPM_BIN="${pkgs.nodejs}/bin/npm"
+  export NPM_CONFIG_PREFIX="$HOME/.npm-packages"
+  export PATH="${pkgs.nodejs}/bin:$NPM_CONFIG_PREFIX/bin:$PATH"
+
+  if [[ ! -x "$NPM_BIN" ]]; then
+    echo "npm not found; skipping npm CLI installation step"
+    exit 0
+  fi
+
+  for pkg in ${lib.concatStringsSep " " (map lib.escapeShellArg npmPackages)}; do
+    if "$NPM_BIN" list -g --depth=0 "$pkg" >/dev/null 2>&1; then
+      echo "npm package already installed: $pkg"
+    else
+      echo "installing npm package: $pkg"
+      "$NPM_BIN" install -g "$pkg"
+    fi
+  done
+''