Take Sam Elkhateeb's path for "path" dependencies and clean it up some.

utils/pub/io.dart

 // Copyright (c) 2012, 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';
@@ skipping 297 matching lines @@
 
 /// Creates a new symlink that creates an alias from [from] to [to], both of
 /// which can be a [String], [File], or [Directory]. Returns a [Future] which
 /// completes to the symlink file (i.e. [to]).
 ///
 /// Note that on Windows, only directories may be symlinked to.
 Future<File> createSymlink(from, to) {
   from = _getPath(from);
   to = _getPath(to);
 
-  log.fine("Create symlink $from -> $to.");
+  log.fine("Creating symlink ($to is a symlink to $from)");
 
   var command = 'ln';
   var args = ['-s', from, to];
 
   if (Platform.operatingSystem == 'windows') {
     // Call mklink on Windows to create an NTFS junction point. Only works on
     // Vista or later. (Junction points are available earlier, but the "mklink"
     // command is not.) I'm using a junction point (/j) here instead of a soft
     // link (/d) because the latter requires some privilege shenanigans that
     // I'm not sure how to specify from the command line.
@@ skipping 612 matching lines @@
 Directory _getDirectory(entry) {
   if (entry is Directory) return entry;
   return new Directory(entry);
 }
 
 /// 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);
 }