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

mojo/public/dart/third_party/test/lib/src/runner/configuration.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.
+
+library test.runner.configuration;
+
+import 'dart:io';
+import 'dart:math' as math;
+
+import 'package:args/args.dart';
+import 'package:path/path.dart' as p;
+
+import '../frontend/timeout.dart';
+import '../backend/metadata.dart';
+import '../backend/test_platform.dart';
+import '../util/io.dart';
+
+/// The default number of test suites to run at once.
+///
+/// This defaults to half the available processors, since presumably some of
+/// them will be used for the OS and other processes.
+final _defaultConcurrency = math.max(1, Platform.numberOfProcessors ~/ 2);
+
+/// A class that encapsulates the command-line configuration of the test runner.
+class Configuration {
+  /// The parser used to parse the command-line arguments.
+  static final ArgParser _parser = (() {
+    var parser = new ArgParser(allowTrailingOptions: true);
+
+    var allPlatforms = TestPlatform.all.toList();
+    if (!Platform.isMacOS) allPlatforms.remove(TestPlatform.safari);
+    if (!Platform.isWindows) allPlatforms.remove(TestPlatform.internetExplorer);
+
+    parser.addFlag("help", abbr: "h", negatable: false,
+        help: "Shows this usage information.");
+    parser.addFlag("version", negatable: false,
+        help: "Shows the package's version.");
+    parser.addOption("package-root", hide: true);
+    parser.addOption("name",
+        abbr: 'n',
+        help: 'A substring of the name of the test to run.\n'
+            'Regular expression syntax is supported.');
+    parser.addOption("plain-name",
+        abbr: 'N',
+        help: 'A plain-text substring of the name of the test to run.');
+    parser.addOption("platform",
+        abbr: 'p',
+        help: 'The platform(s) on which to run the tests.',
+        allowed: allPlatforms.map((platform) => platform.identifier).toList(),
+        defaultsTo: 'vm',
+        allowMultiple: true);
+    parser.addOption("concurrency",
+        abbr: 'j',
+        help: 'The number of concurrent test suites run.\n'
+            '(defaults to $_defaultConcurrency)',
+        valueHelp: 'threads');
+    parser.addOption("pub-serve",
+        help: 'The port of a pub serve instance serving "test/".',
+        valueHelp: 'port');
+    parser.addFlag("pause-after-load",
+        help: 'Pauses for debugging before any tests execute.\n'
+            'Implies --concurrency=1.\n'
+            'Currently only supported for browser tests.',
+        negatable: false);
+    parser.addOption("reporter",
+        abbr: 'r',
+        help: 'The runner used to print test results.',
+        allowed: ['compact', 'expanded'],
+        defaultsTo: Platform.isWindows ? 'expanded' : 'compact',
+        allowedHelp: {
+      'compact': 'A single line, updated continuously.',
+      'expanded': 'A separate line for each update.'
+    });
+    parser.addFlag("verbose-trace", negatable: false,
+        help: 'Whether to emit stack traces with core library frames.');
+    parser.addFlag("js-trace", negatable: false,
+        help: 'Whether to emit raw JavaScript stack traces for browser tests.');
+    parser.addFlag("color", defaultsTo: null,
+        help: 'Whether to use terminal colors.\n(auto-detected by default)');
+
+    return parser;
+  })();
+
+  /// The usage string for the command-line arguments.
+  static String get usage => _parser.usage;
+
+  /// Whether `--help` was passed.
+  final bool help;
+
+  /// Whether `--version` was passed.
+  final bool version;
+
+  /// Whether stack traces should be presented as-is or folded to remove
+  /// irrelevant packages.
+  final bool verboseTrace;
+
+  /// Whether JavaScript stack traces should be left as-is or converted to
+  /// Dart-like traces.
+  final bool jsTrace;
+
+  /// Whether to pause for debugging after loading each test suite.
+  final bool pauseAfterLoad;
+
+  /// The package root for resolving "package:" URLs.
+  final String packageRoot;
+
+  /// The name of the reporter to use to display results.
+  final String reporter;
+
+  /// The URL for the `pub serve` instance from which to load tests, or `null`
+  /// if tests should be loaded from the filesystem.
+  final Uri pubServeUrl;
+
+  /// Whether to use command-line color escapes.
+  final bool color;
+
+  /// How many tests to run concurrently.
+  final int concurrency;
+
+  /// The from which to load tests.
+  final List<String> paths;
+
+  /// Whether the load paths were passed explicitly or the default was used.
+  final bool explicitPaths;
+
+  /// The pattern to match against test names to decide which to run, or `null`
+  /// if all tests should be run.
+  final Pattern pattern;
+
+  /// The set of platforms on which to run tests.
+  final List<TestPlatform> platforms;
+
+  /// The global test metadata derived from this configuration.
+  Metadata get metadata =>
+      new Metadata(
+          timeout: pauseAfterLoad ? Timeout.none : null,
+          verboseTrace: verboseTrace);
+
+  /// Parses the configuration from [args].
+  ///
+  /// Throws a [FormatException] if [args] are invalid.
+  factory Configuration.parse(List<String> args) {
+    var options = _parser.parse(args);
+
+    var pattern;
+    if (options['name'] != null) {
+      if (options["plain-name"] != null) {
+        throw new FormatException(
+            "--name and --plain-name may not both be passed.");
+      }
+
+      pattern = _wrapFormatException(
+          options, 'name', (value) => new RegExp(value));
+    } else if (options['plain-name'] != null) {
+      pattern = options['plain-name'];
+    }
+
+    return new Configuration(
+        help: options['help'],
+        version: options['version'],
+        verboseTrace: options['verbose-trace'],
+        jsTrace: options['js-trace'],
+        pauseAfterLoad: options['pause-after-load'],
+        color: options['color'],
+        packageRoot: options['package-root'],
+        reporter: options['reporter'],
+        pubServePort: _wrapFormatException(options, 'pub-serve', int.parse),
+        concurrency: _wrapFormatException(options, 'concurrency', int.parse,
+            orElse: () => _defaultConcurrency),
+        pattern: pattern,
+        platforms: options['platform'].map(TestPlatform.find),
+        paths: options.rest.isEmpty ? null : options.rest);
+  }
+
+  /// Runs [parse] on the value of the option [name], and wraps any
+  /// [FormatException] it throws with additional information.
+  static _wrapFormatException(ArgResults options, String name, parse(value),
+      {orElse()}) {
+    var value = options[name];
+    if (value == null) return orElse == null ? null : orElse();
+
+    try {
+      return parse(value);
+    } on FormatException catch (error) {
+      throw new FormatException('Couldn\'t parse --$name "${options[name]}": '
+          '${error.message}');
+    }
+  }
+
+  Configuration({this.help: false, this.version: false,
+          this.verboseTrace: false, this.jsTrace: false,
+          bool pauseAfterLoad: false, bool color, String packageRoot,
+          String reporter, int pubServePort, int concurrency, this.pattern,
+          Iterable<TestPlatform> platforms, Iterable<String> paths})
+      : pauseAfterLoad = pauseAfterLoad,
+        color = color == null ? canUseSpecialChars : color,
+        packageRoot = packageRoot == null
+            ? p.join(p.current, 'packages')
+            : packageRoot,
+        reporter = reporter == null ? 'compact' : reporter,
+        pubServeUrl = pubServePort == null
+            ? null
+            : Uri.parse("http://localhost:$pubServePort"),
+        concurrency = pauseAfterLoad
+            ? 1
+            : (concurrency == null ? _defaultConcurrency : concurrency),
+        platforms = platforms == null ? [TestPlatform.vm] : platforms.toList(),
+        paths = paths == null ? ["test"] : paths.toList(),
+        explicitPaths = paths != null;
+}