Delete a bunch of packages that are now on GitHub.

pkg/json_rpc_2/lib/src/utils.dart

-// Copyright (c) 2014, 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 json_rpc_2.utils;
-
-import 'dart:async';
-
-import 'package:stack_trace/stack_trace.dart';
-
-typedef ZeroArgumentFunction();
-
-/// Like [new Future.sync], but automatically wraps the future in a
-/// [Chain.track] call.
-Future syncFuture(callback()) => Chain.track(new Future.sync(callback));
-
-/// Returns a sentence fragment listing the elements of [iter].
-///
-/// This converts each element of [iter] to a string and separates them with
-/// commas and/or "and" where appropriate.
-String toSentence(Iterable iter) {
-  if (iter.length == 1) return iter.first.toString();
-  return iter.take(iter.length - 1).join(", ") + " and ${iter.last}";
-}
-
-/// Returns [name] if [number] is 1, or the plural of [name] otherwise.
-///
-/// By default, this just adds "s" to the end of [name] to get the plural. If
-/// [plural] is passed, that's used instead.
-String pluralize(String name, int number, {String plural}) {
-  if (number == 1) return name;
-  if (plural != null) return plural;
-  return '${name}s';
-}
-
-/// A regular expression to match the exception prefix that some exceptions'
-/// [Object.toString] values contain.
-final _exceptionPrefix = new RegExp(r'^([A-Z][a-zA-Z]*)?(Exception|Error): ');
-
-/// Get a string description of an exception.
-///
-/// Many exceptions include the exception class name at the beginning of their
-/// [toString], so we remove that if it exists.
-String getErrorMessage(error) =>
-    error.toString().replaceFirst(_exceptionPrefix, '');
-
-/// Like `try`/`finally`, run [body] and ensure that [whenComplete] runs
-/// afterwards, regardless of whether [body] succeeded.
-///
-/// This is synchronicity-agnostic relative to [body]. If [body] returns a
-/// [Future], this wil run asynchronously; otherwise it will run synchronously.
-tryFinally(body(), whenComplete()) {
-  var result;
-  try {
-    result = body();
-  } catch (_) {
-    whenComplete();
-    rethrow;
-  }
-
-  if (result is! Future) {
-    whenComplete();
-    return result;
-  } else {
-    return result.whenComplete(whenComplete);
-  }
-}
-
-/// Returns a [StreamSink] that wraps [sink] and maps each event added using
-/// [callback].
-StreamSink mapStreamSink(StreamSink sink, callback(event)) =>
-    new _MappedStreamSink(sink, callback);
-
-/// A [StreamSink] wrapper that maps each event added to the sink.
-class _MappedStreamSink implements StreamSink {
-  final StreamSink _inner;
-  final Function _callback;
-
-  Future get done => _inner.done;
-
-  _MappedStreamSink(this._inner, this._callback);
-
-  void add(event) => _inner.add(_callback(event));
-  void addError(error, [StackTrace stackTrace]) =>
-      _inner.addError(error, stackTrace);
-  Future addStream(Stream stream) => _inner.addStream(stream.map(_callback));
-  Future close() => _inner.close();
-}