add hw2

node_modules/@iconify/utils/lib/loader/install-pkg.js

@@ -0,0 +1,28 @@
+import { warnOnce } from "./warn.js";
+import { installPackage } from "@antfu/install-pkg";
+import { sleep } from "@antfu/utils";
+import { cyan } from "kolorist";
+
+let pending;
+const tasks = {};
+async function tryInstallPkg(name, autoInstall) {
+	if (pending) await pending;
+	if (!tasks[name]) {
+		console.log(cyan(`Installing ${name}...`));
+		if (typeof autoInstall === "function") tasks[name] = pending = autoInstall(name).then(() => sleep(300)).finally(() => {
+			pending = void 0;
+		});
+		else tasks[name] = pending = installPackage(name, {
+			dev: true,
+			preferOffline: true
+		}).then(() => sleep(300)).catch((e) => {
+			warnOnce(`Failed to install ${name}`);
+			console.error(e);
+		}).finally(() => {
+			pending = void 0;
+		});
+	}
+	return tasks[name];
+}
+
+export { tryInstallPkg };