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

mojo/public/dart/third_party/test/lib/src/util/io.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.util.io;
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+import 'dart:mirrors';
+
+import 'package:path/path.dart' as p;
+import 'package:pub_semver/pub_semver.dart';
+
+import '../backend/operating_system.dart';
+import '../runner/application_exception.dart';
+import '../util/stream_queue.dart';
+import '../utils.dart';
+
+/// The ASCII code for a newline character.
+const _newline = 0xA;
+
+/// The ASCII code for a carriage return character.
+const _carriageReturn = 0xD;
+
+/// The root directory of the Dart SDK.
+final String sdkDir = p.dirname(p.dirname(Platform.resolvedExecutable));
+
+/// The version of the Dart SDK currently in use.
+final Version _sdkVersion = new Version.parse(
+    new File(p.join(sdkDir, 'version'))
+        .readAsStringSync().trim());
+
+/// Returns the current operating system.
+final OperatingSystem currentOS = (() {
+  var name = Platform.operatingSystem;
+  var os = OperatingSystem.findByIoName(name);
+  if (os != null) return os;
+
+  throw new UnsupportedError('Unsupported operating system "$name".');
+})();
+
+/// A queue of lines of standard input.
+final stdinLines = new StreamQueue(
+    UTF8.decoder.fuse(const LineSplitter()).bind(stdin));
+
+/// The root directory below which to nest temporary directories created by the
+/// test runner.
+///
+/// This is configurable so that the test code can validate that the runner
+/// cleans up after itself fully.
+final _tempDir = Platform.environment.containsKey("_UNITTEST_TEMP_DIR")
+    ? Platform.environment["_UNITTEST_TEMP_DIR"]
+    : Directory.systemTemp.path;
+
+/// The path to the `lib` directory of the `test` package.
+String libDir({String packageRoot}) {
+  var pathToIo = libraryPath(#test.util.io, packageRoot: packageRoot);
+  return p.dirname(p.dirname(p.dirname(pathToIo)));
+}
+
+// TODO(nweiz): Make this check [stdioType] once that works within "pub run".
+/// Whether "special" strings such as Unicode characters or color escapes are
+/// safe to use.
+///
+/// On Windows or when not printing to a terminal, only printable ASCII
+/// characters should be used.
+bool get canUseSpecialChars =>
+    Platform.operatingSystem != 'windows' &&
+    Platform.environment["_UNITTEST_USE_COLOR"] != "false";
+
+/// Creates a temporary directory and returns its path.
+String createTempDir() =>
+    new Directory(_tempDir).createTempSync('dart_test_').path;
+
+/// Creates a temporary directory and passes its path to [fn].
+///
+/// Once the [Future] returned by [fn] completes, the temporary directory and
+/// all its contents are deleted. [fn] can also return `null`, in which case
+/// the temporary directory is deleted immediately afterwards.
+///
+/// Returns a future that completes to the value that the future returned from
+/// [fn] completes to.
+Future withTempDir(Future fn(String path)) {
+  return new Future.sync(() {
+    var tempDir = createTempDir();
+    return new Future.sync(() => fn(tempDir))
+        .whenComplete(() => new Directory(tempDir).deleteSync(recursive: true));
+  });
+}
+
+/// Return a transformation of [input] with all null bytes removed.
+///
+/// This works around the combination of issue 23295 and 22667 by removing null
+/// bytes. This workaround can be removed when either of those are fixed in the
+/// oldest supported SDK.
+///
+/// It also somewhat works around issue 23303 by removing any carriage returns
+/// that are followed by newlines, to ensure that carriage returns aren't
+/// doubled up in the output. This can be removed when the issue is fixed in the
+/// oldest supported SDk.
+Stream<List<int>> sanitizeForWindows(Stream<List<int>> input) {
+  if (!Platform.isWindows) return input;
+
+  return input.map((list) {
+    var previous;
+    return list.reversed.where((byte) {
+      if (byte == 0) return false;
+      if (byte == _carriageReturn && previous == _newline) return false;
+      previous = byte;
+      return true;
+    }).toList().reversed.toList();
+  });
+}
+
+/// Print a warning containing [message].
+///
+/// This automatically wraps lines if they get too long. If [color] is passed,
+/// it controls whether the warning header is color; otherwise, it defaults to
+/// [canUseSpecialChars].
+void warn(String message, {bool color}) {
+  if (color == null) color = canUseSpecialChars;
+  var header = color
+      ? "\u001b[33mWarning:\u001b[0m"
+      : "Warning:";
+  stderr.writeln(wordWrap("$header $message\n"));
+}
+
+/// Creates a URL string for [address]:[port].
+///
+/// Handles properly formatting IPv6 addresses.
+Uri baseUrlForAddress(InternetAddress address, int port) {
+  if (address.isLoopback) {
+    return new Uri(scheme: "http", host: "localhost", port: port);
+  }
+
+  // IPv6 addresses in URLs need to be enclosed in square brackets to avoid
+  // URL ambiguity with the ":" in the address.
+  if (address.type == InternetAddressType.IP_V6) {
+    return new Uri(scheme: "http", host: "[${address.address}]", port: port);
+  }
+
+  return new Uri(scheme: "http", host: address.address, port: port);
+}
+
+/// Returns the package root at [root].
+///
+/// If [override] is passed, that's used. If the package root doesn't exist, an
+/// [ApplicationException] is thrown.
+String packageRootFor(String root, [String override]) {
+  if (root == null) root = p.current;
+  var packageRoot = override == null ? p.join(root, 'packages') : override;
+
+  if (!new Directory(packageRoot).existsSync()) {
+    throw new ApplicationException(
+        "Directory ${p.prettyUri(p.toUri(packageRoot))} does not exist.");
+  }
+
+  return packageRoot;
+}
+
+/// The library name must be globally unique, or the wrong library path may be
+/// returned.
+String libraryPath(Symbol libraryName, {String packageRoot}) {
+  var lib = currentMirrorSystem().findLibrary(libraryName);
+  if (lib.uri.scheme != 'package') return p.fromUri(lib.uri);
+
+  // TODO(nweiz): is there a way to avoid assuming this is being run next to a
+  // packages directory?.
+  if (packageRoot == null) packageRoot = p.absolute('packages');
+  return p.join(packageRoot, p.fromUri(lib.uri.path));
+}
+
+/// Repeatedly finds a probably-unused port on localhost and passes it to
+/// [tryPort] until it binds successfully.
+///
+/// [tryPort] should return a non-`null` value or a Future completing to a
+/// non-`null` value once it binds successfully. This value will be returned
+/// by [getUnusedPort] in turn.
+///
+/// This is necessary for ensuring that our port binding isn't flaky for
+/// applications that don't print out the bound port.
+Future getUnusedPort(tryPort(int port)) {
+  var value;
+  return Future.doWhile(() async {
+    value = await tryPort(await getUnsafeUnusedPort());
+    return value == null;
+  }).then((_) => value);
+}
+
+/// Returns a port that is probably, but not definitely, not in use.
+///
+/// This has a built-in race condition: another process may bind this port at
+/// any time after this call has returned. If at all possible, callers should
+/// use [getUnusedPort] instead.
+Future<int> getUnsafeUnusedPort() async {
+  var socket = await RawServerSocket.bind(InternetAddress.LOOPBACK_IP_V4, 0);
+  var port = socket.port;
+  await socket.close();
+  return port;
+}