Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/test/lib/src/executable.dart

+// Copyright (c) 2015, 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.
+
+// TODO(nweiz): This is under lib so that it can be used by the unittest dummy
+// package. Once that package is no longer being updated, move this back into
+// bin.
+library test.executable;
+
+import 'dart:io';
+
+import 'package:stack_trace/stack_trace.dart';
+import 'package:yaml/yaml.dart';
+
+import 'runner.dart';
+import 'runner/application_exception.dart';
+import 'runner/configuration.dart';
+import 'util/exit_codes.dart' as exit_codes;
+import 'util/io.dart';
+import 'utils.dart';
+
+/// A merged stream of all signals that tell the test runner to shut down
+/// gracefully.
+///
+/// Signals will only be captured as long as this has an active subscription.
+/// Otherwise, they'll be handled by Dart's default signal handler, which
+/// terminates the program immediately.
+final _signals = Platform.isWindows
+    ? ProcessSignal.SIGINT.watch()
+    : mergeStreams([
+        ProcessSignal.SIGTERM.watch(),
+        ProcessSignal.SIGINT.watch()
+      ]);
+
+/// Returns whether the current package has a pubspec which uses the
+/// `test/pub_serve` transformer.
+bool get _usesTransformer {
+  if (!new File('pubspec.yaml').existsSync()) return false;
+  var contents = new File('pubspec.yaml').readAsStringSync();
+
+  var yaml;
+  try {
+    yaml = loadYaml(contents);
+  } on FormatException {
+    return false;
+  }
+
+  if (yaml is! Map) return false;
+
+  var transformers = yaml['transformers'];
+  if (transformers == null) return false;
+  if (transformers is! List) return false;
+
+  return transformers.any((transformer) {
+    if (transformer is String) return transformer == 'test/pub_serve';
+    if (transformer is! Map) return false;
+    if (transformer.keys.length != 1) return false;
+    return transformer.keys.single == 'test/pub_serve';
+  });
+}
+
+main(List<String> args) async {
+  var configuration;
+  try {
+    configuration = new Configuration.parse(args);
+  } on FormatException catch (error) {
+    _printUsage(error.message);
+    exitCode = exit_codes.usage;
+    return;
+  }
+
+  if (configuration.help) {
+    _printUsage();
+    return;
+  }
+
+  if (configuration.version) {
+    if (!_printVersion()) {
+      stderr.writeln("Couldn't find version number.");
+      exitCode = exit_codes.data;
+    }
+    return;
+  }
+
+  if (configuration.pubServeUrl != null && !_usesTransformer) {
+    stderr.write('''
+When using --pub-serve, you must include the "test/pub_serve" transformer in
+your pubspec:
+
+transformers:
+- test/pub_serve:
+    \$include: test/**_test.dart
+''');
+    exitCode = exit_codes.data;
+    return;
+  }
+
+  if (!configuration.explicitPaths &&
+      !new Directory(configuration.paths.single).existsSync()) {
+    _printUsage('No test files were passed and the default "test/" '
+        "directory doesn't exist.");
+    exitCode = exit_codes.data;
+    return;
+  }
+
+  var runner = new Runner(configuration);
+
+  var signalSubscription;
+  close() async {
+    if (signalSubscription == null) return;
+    signalSubscription.cancel();
+    signalSubscription = null;
+    stdinLines.cancel(immediate: true);
+    await runner.close();
+  }
+
+  signalSubscription = _signals.listen((_) => close());
+
+  try {
+    exitCode = (await runner.run()) ? 0 : 1;
+  } on ApplicationException catch (error) {
+    stderr.writeln(error.message);
+    exitCode = exit_codes.data;
+  } catch (error, stackTrace) {
+    stderr.writeln(getErrorMessage(error));
+    stderr.writeln(new Trace.from(stackTrace).terse);
+    stderr.writeln(
+        "This is an unexpected error. Please file an issue at "
+            "http://github.com/dart-lang/test\n"
+        "with the stack trace and instructions for reproducing the error.");
+    exitCode = exit_codes.software;
+  } finally {
+    await close();
+  }
+}
+
+/// Print usage information for this command.
+///
+/// If [error] is passed, it's used in place of the usage message and the whole
+/// thing is printed to stderr instead of stdout.
+void _printUsage([String error]) {
+  var output = stdout;
+
+  var message = "Runs tests in this package.";
+  if (error != null) {
+    message = error;
+    output = stderr;
+  }
+
+  output.write("""$message
+
+Usage: pub run test:test [files or directories...]
+
+${Configuration.usage}
+""");
+}
+
+/// Prints the version number of the test package.
+///
+/// This loads the version number from the current package's lockfile. It
+/// returns true if it successfully printed the version number and false if it
+/// couldn't be loaded.
+bool _printVersion() {
+  var lockfile;
+  try {
+    lockfile = loadYaml(new File("pubspec.lock").readAsStringSync());
+  } on FormatException catch (_) {
+    return false;
+  } on IOException catch (_) {
+    return false;
+  }
+
+  if (lockfile is! Map) return false;
+  var packages = lockfile["packages"];
+  if (packages is! Map) return false;
+  var package = packages["test"];
+  if (package is! Map) return false;
+
+  var source = package["source"];
+  if (source is! String) return false;
+
+  switch (source) {
+    case "hosted":
+      var version = package["version"];
+      if (version is! String) return false;
+
+      print(version);
+      return true;
+
+    case "git":
+      var version = package["version"];
+      if (version is! String) return false;
+      var description = package["description"];
+      if (description is! Map) return false;
+      var ref = description["resolved-ref"];
+      if (ref is! String) return false;
+
+      print("$version (${ref.substring(0, 7)})");
+      return true;
+
+    case "path":
+      var version = package["version"];
+      if (version is! String) return false;
+      var description = package["description"];
+      if (description is! Map) return false;
+      var path = description["path"];
+      if (path is! String) return false;
+
+      print("$version (from $path)");
+      return true;
+
+    default: return false;
+  }
+}