Switch pkg packages, pub, and dartdoc to use package: imports.

utils/pub/io.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.
 
 /// Helper functionality to make working with IO easier.
 library io;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:json';
 import 'dart:uri';
 
-import '../../pkg/pathos/lib/path.dart' as path;
-import '../../pkg/http/lib/http.dart' show ByteStream;
+import 'package:pathos/path.dart' as path;
+import 'package:http/http.dart' show ByteStream;
 import 'error_group.dart';
 import 'exit_codes.dart' as exit_codes;
 import 'log.dart' as log;
 import 'utils.dart';
 
-export '../../pkg/http/lib/http.dart' show ByteStream;
+export 'package:http/http.dart' show ByteStream;
 
 /// Returns whether or not [entry] is nested somewhere within [dir]. This just
 /// performs a path comparison; it doesn't look at the actual filesystem.
 bool isBeneath(String entry, String dir) {
   var relative = path.relative(entry, from: dir);
   return !path.isAbsolute(relative) && path.split(relative)[0] != '..';
 }
 
 /// Determines if a file or directory exists at [path].
 bool entryExists(String path) => dirExists(path) || fileExists(path);
@@ skipping 271 matching lines @@
   var utilDir = path.dirname(scriptPath);
   while (path.basename(utilDir) != 'utils' &&
          path.basename(utilDir) != 'util') {
     if (path.basename(utilDir) == '') throw 'Could not find path to pub.';
     utilDir = path.dirname(utilDir);
   }
 
   return path.normalize(path.join(utilDir, 'pub', target));
 }
 
+/// Whether pub is running from within the Dart SDK, as opposed to from the Dart
+/// source repository.
+bool get runningFromSdk => path.dirname(relativeToPub('..')) == 'util';

[Bob Nystrom, 2013/03/26 01:55:44]

Does pub itself need these or are they just for tests? If for tests, let's move
it into test_pub.dart.

[nweiz, 2013/03/26 02:09:53]

Done.

+
+// TODO(nweiz): use the built-in mechanism for accessing this once it exists
+// (issue 9119).
+/// The path to the `packages` directory from which pub loads its dependencies.
+String get packageRoot {
+  if (runningFromSdk) {
+    return path.absolute(relativeToPub(path.join('..', '..', 'packages')));
+  } else {
+    return path.absolute(path.join(
+        path.dirname(new Options().executable), '..', '..', 'packages'));
+  }
+}
+
 // TODO(nweiz): add a ByteSink wrapper to make writing strings to stdout/stderr
 // nicer.
 
 /// A sink that writes to standard output. Errors piped to this stream will be
 /// surfaced to the top-level error handler.
 final EventSink<List<int>> stdoutSink = _wrapStdio(stdout, "stdout");
 
 /// A sink that writes to standard error. Errors piped to this stream will be
 /// surfaced to the top-level error handler.
 final EventSink<List<int>> stderrSink = _wrapStdio(stderr, "stderr");
@@ skipping 442 matching lines @@
   const PubProcessResult(this.stdout, this.stderr, this.exitCode);
 
   bool get success => exitCode == 0;
 }
 
 /// Gets a [Uri] for [uri], which can either already be one, or be a [String].
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return Uri.parse(uri);
 }