fix: respect root options in startup guards (#86927)

test/scripts/check-cli-startup-memory.test.ts

@@ -0,0 +1,42 @@
+import { spawnSync } from "node:child_process";
+import { readdirSync, mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+
+const tempRoots: string[] = [];
+
+function makeTempRoot(): string {
+  const root = mkdtempSync(path.join(tmpdir(), "openclaw-startup-memory-test-"));
+  tempRoots.push(root);
+  return root;
+}
+
+afterEach(() => {
+  for (const root of tempRoots.splice(0)) {
+    rmSync(root, { recursive: true, force: true });
+  }
+});
+
+describe("check-cli-startup-memory", () => {
+  it("does not create a temp home before argument validation succeeds", () => {
+    if (process.platform !== "darwin" && process.platform !== "linux") {
+      return;
+    }
+
+    const tempRoot = makeTempRoot();
+    const result = spawnSync(process.execPath, ["scripts/check-cli-startup-memory.mjs", "--json"], {
+      cwd: path.resolve(__dirname, "..", ".."),
+      encoding: "utf8",
+      env: {
+        ...process.env,
+        TMPDIR: tempRoot,
+        TEMP: tempRoot,
+        TMP: tempRoot,
+      },
+    });
+
+    expect(result.status).not.toBe(0);
+    expect(readdirSync(tempRoot)).toEqual([]);
+  });
+});