Enable CurlClient tests on Windows by bundling curl.exe.

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:io';
@@ skipping 347 matching lines @@
   } else {
     if (path.startsWith('/')) return path;
   }
 
   // Using Path.join here instead of File().fullPathSync() because the former
   // does not require an actual file to exist at that path.
   return new Path.fromNative(currentWorkingDir).join(new Path(path))
       .toNativePath();
 }
 
+/// Resolves [path] relative to the location of pub.dart.
+String relativeToPub(String path) {
+  var scriptPath = new File(new Options().script).fullPathSync();
+  var scriptDir = new Path.fromNative(scriptPath).directoryPath;
+  return scriptDir.append(path).canonicalize().toNativePath();
+}
+
 // TODO(nweiz): make this configurable
 /**
  * The amount of time in milliseconds to allow HTTP requests before assuming
  * they've failed.
  */
 final HTTP_TIMEOUT = 30 * 1000;
 
 /**
  * Opens an input stream for a HTTP GET request to [uri], which may be a
  * [String] or [Uri].
@@ skipping 261 matching lines @@
 }
 
 Future<bool> _extractTarGzWindows(InputStream stream, String destination) {
   // TODO(rnystrom): In the repo's history, there is an older implementation of
   // this that does everything in memory by piping streams directly together
   // instead of writing out temp files. The code is simpler, but unfortunately,
   // 7zip seems to periodically fail when we invoke it from Dart and tell it to
   // read from stdin instead of a file. Consider resurrecting that version if
   // we can figure out why it fails.
 
-  // Find 7zip.
-  var scriptPath = new File(new Options().script).fullPathSync();
-  var scriptDir = new Path.fromNative(scriptPath).directoryPath;
-
   // Note: This line of code gets munged by create_sdk.py to be the correct
   // relative path to 7zip in the SDK.
   var pathTo7zip = '../../third_party/7zip/7za.exe';
-  var command = scriptDir.append(pathTo7zip).canonicalize().toNativePath();
+  var command = relativeToPub(pathTo7zip);
 
   var tempDir;
 
   return createTempDir().chain((temp) {
     // Write the archive to a temp file.
     tempDir = temp;
     return createFileFromStream(stream, join(tempDir, 'data.tar.gz'));
   }).chain((_) {
     // 7zip can't unarchive from gzip -> tar -> destination all in one step
     // first we un-gzip it to a tar file.
@@ skipping 92 matching lines @@
   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 new Uri.fromString(uri);
 }