refactor(utils): share shell argv tokenizer

src/utils/shell-argv.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest";
+import { splitShellArgs } from "./shell-argv.js";
+
+describe("splitShellArgs", () => {
+  it("splits whitespace and respects quotes", () => {
+    expect(splitShellArgs(`qmd --foo "bar baz"`)).toEqual(["qmd", "--foo", "bar baz"]);
+    expect(splitShellArgs(`qmd --foo 'bar baz'`)).toEqual(["qmd", "--foo", "bar baz"]);
+  });
+
+  it("supports backslash escapes inside double quotes", () => {
+    expect(splitShellArgs(String.raw`echo "a\"b"`)).toEqual(["echo", `a"b`]);
+    expect(splitShellArgs(String.raw`echo "\$HOME"`)).toEqual(["echo", "$HOME"]);
+  });
+
+  it("returns null for unterminated quotes", () => {
+    expect(splitShellArgs(`echo "oops`)).toBeNull();
+    expect(splitShellArgs(`echo 'oops`)).toBeNull();
+  });
+});