Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/get/hosted/avoid_network_requests_test.dart

+library pub_tests;
+import 'package:scheduled_test/scheduled_test.dart';
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+main() {
+  initConfig();
+  integration('only requests versions that are needed during solving', () {
+    servePackages((builder) {
+      builder.serve("foo", "1.0.0");
+      builder.serve("foo", "1.1.0");
+      builder.serve("foo", "1.2.0");
+      builder.serve("bar", "1.0.0");
+      builder.serve("bar", "1.1.0");
+      builder.serve("bar", "1.2.0");
+    });
+    d.appDir({
+      "foo": "any"
+    }).create();
+    pubGet();
+    getRequestedPaths();
+    d.appDir({
+      "foo": "any",
+      "bar": "any"
+    }).create();
+    pubGet();
+    d.packagesDir({
+      "foo": "1.2.0",
+      "bar": "1.2.0"
+    }).validate();
+    getRequestedPaths().then((paths) {
+      expect(
+          paths,
+          unorderedEquals(
+              [
+                  "api/packages/bar",
+                  "api/packages/bar/versions/1.2.0",
+                  "packages/bar/versions/1.2.0.tar.gz"]));
+    });
+  });
+}