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

sdk/lib/_internal/pub/test/test_pub.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Test infrastructure for testing pub.
 ///
 /// Unlike typical unit tests, most pub tests are integration tests that stage
 /// some stuff on the file system, run pub, and then validate the results. This
 /// library provides an API to build tests like that.
 library test_pub;
@@ skipping 458 matching lines @@
   pub.stdout.expect(emitsLines(
       "|-- LICENSE\n"
       "|-- lib\n"
       "|   '-- test_pkg.dart\n"
       "'-- pubspec.yaml\n"
       "\n"
       "Looks great! Are you ready to upload your package (y/n)?"));
   pub.writeLine("y");
 }
 
-/// Whether the async/await compiler has already been run.
-///
-/// If a test suite runs pub more than once, we only need to run the compiler
-/// the first time.
-// TODO(rnystrom): Remove this when #104 is fixed.
-bool _compiledAsync = false;
-
-/// Gets the path to the pub entrypoint Dart script to run.
-// TODO(rnystrom): This exists to run the async/await compiler on pub and then
-// get the path to the output of that. Once #104 is fixed, remove this.
-String _getPubPath(String dartBin) {
-  var buildDir = p.join(p.dirname(dartBin), '../../');
-
-  // Ensure the async/await compiler has been run once for this test suite. The
-  // compiler itself will only re-compile source files that have actually
-  // changed, so this is a no-op if everything is already compiled.
-  if (!_compiledAsync) {
-    var result = Process.runSync(dartBin, [
-      '--package-root=$_packageRoot/',
-      p.join(testDirectory, '..', 'bin', 'async_compile.dart'),
-      buildDir,
-      '--silent'
-    ]);
-    stdout.write(result.stdout);
-    stderr.write(result.stderr);
-    if (result.exitCode != 0) fail("Async/await compiler failed.");
-
-    _compiledAsync = true;
-  }
-
-  return p.join(buildDir, 'pub_async/bin/pub.dart');
-}
-
 /// Starts a Pub process and returns a [ScheduledProcess] that supports
 /// interaction with that process.
 ///
 /// Any futures in [args] will be resolved before the process is started.
 ScheduledProcess startPub({List args, Future<Uri> tokenEndpoint}) {
   String pathInSandbox(String relPath) {
     return p.join(p.absolute(sandboxDir), relPath);
   }
 
   ensureDir(pathInSandbox(appPath));
 
   // Find a Dart executable we can use to spawn. Use the same one that was
   // used to run this script itself.
   var dartBin = Platform.executable;
 
   // If the executable looks like a path, get its full path. That way we
   // can still find it when we spawn it with a different working directory.
   if (dartBin.contains(Platform.pathSeparator)) {
     dartBin = p.absolute(dartBin);
   }
 
-  // Find the main pub entrypoint.
-  var pubPath = _getPubPath(dartBin);
-  // TODO(rnystrom): Replace the above line with the following when #104 is
-  // fixed.
-  //var pubPath = p.join(testDirectory, '..', 'bin', 'pub.dart');
-
-  var dartArgs = ['--package-root=$_packageRoot/', '--checked', pubPath,
-      '--verbose'];
+  // Always run pub from a snapshot. Since we require the SDK to be built, the
+  // snapshot should be there. Note that this *does* mean that the snapshot has
+  // to be manually updated when changing code before running the tests.
+  // Otherwise, you will test against stale data.
+  //
+  // Using the snapshot makes running the tests much faster, which is why we
+  // make this trade-off.
+  var pubPath = p.join(p.dirname(dartBin), 'snapshots/pub.dart.snapshot');
+  var dartArgs = [pubPath, '--verbose'];
   dartArgs.addAll(args);
 
   if (tokenEndpoint == null) tokenEndpoint = new Future.value();
   var environmentFuture = tokenEndpoint.then((tokenEndpoint) {
     var environment = {};
     environment['_PUB_TESTING'] = 'true';
     environment['PUB_CACHE'] = pathInSandbox(cachePath);
 
     // Ensure a known SDK version is set for the tests that rely on that.
     environment['_PUB_TEST_SDK_VERSION'] = "0.1.2+3";
@@ skipping 268 matching lines @@
     "homepage": "http://pub.dartlang.org",
     "description": "A package, I guess."
   };
 
   if (dependencies != null) package["dependencies"] = dependencies;
 
   return package;
 }
 
 /// Resolves [target] relative to the path to pub's `test/asset` directory.
-String testAssetPath(String target) =>
-    p.join(p.dirname(libraryPath('test_pub')), 'asset', target);
+String testAssetPath(String target) {
+  var libPath = libraryPath('test_pub');
+
+  // We are running from the generated directory, but non-dart assets are only
+  // in the canonical directory.
+  // TODO(rnystrom): Remove this when #104 is fixed.
+  libPath = libPath.replaceAll('pub_generated', 'pub');
+
+  return p.join(p.dirname(libPath), 'asset', target);
+}
 
 /// Returns a Map in the format used by the pub.dartlang.org API to represent a
 /// package version.
 ///
 /// [pubspec] is the parsed pubspec of the package version. If [full] is true,
 /// this returns the complete map, including metadata that's only included when
 /// requesting the package version directly.
 Map packageVersionApiMap(Map pubspec, {bool full: false}) {
   var name = pubspec['name'];
   var version = pubspec['version'];
@@ skipping 142 matching lines @@
         _lastMatcher.matches(item.last, matchState);
   }
 
   Description describe(Description description) {
     return description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
   }
 }
 
 /// A [StreamMatcher] that matches multiple lines of output.
 StreamMatcher emitsLines(String output) => inOrder(output.split("\n"));