refactor(daemon): extract windows cmd argv helpers

src/daemon/cmd-argv.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it } from "vitest";
+import { parseCmdScriptCommandLine, quoteCmdScriptArg } from "./cmd-argv.js";
+
+describe("cmd argv helpers", () => {
+  it.each([
+    "plain",
+    "with space",
+    "safe&whoami",
+    "safe|whoami",
+    "safe<in",
+    "safe>out",
+    "safe^caret",
+    "%TEMP%",
+    "!token!",
+    'he said "hi"',
+  ])("round-trips single arg: %p", (arg) => {
+    const encoded = quoteCmdScriptArg(arg);
+    expect(parseCmdScriptCommandLine(encoded)).toEqual([arg]);
+  });
+
+  it("round-trips mixed command lines", () => {
+    const args = [
+      "node",
+      "gateway.js",
+      "--display-name",
+      "safe&whoami",
+      "--percent",
+      "%TEMP%",
+      "--bang",
+      "!token!",
+      "--quoted",
+      'he said "hi"',
+    ];
+    const encoded = args.map(quoteCmdScriptArg).join(" ");
+    expect(parseCmdScriptCommandLine(encoded)).toEqual(args);
+  });
+
+  it("rejects CR/LF in command arguments", () => {
+    expect(() => quoteCmdScriptArg("bad\narg")).toThrow(/Command argument cannot contain CR or LF/);
+    expect(() => quoteCmdScriptArg("bad\rarg")).toThrow(/Command argument cannot contain CR or LF/);
+  });
+});