Make listDir and createSymlink synchronous in pub.

utils/pub/command_lish.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.
 
 library command_lish;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:json';
 import 'dart:uri';
@@ skipping 128 matching lines @@
     var rootDir = entrypoint.root.dir;
 
     return git.isInstalled.then((gitInstalled) {
       if (dirExists(path.join(rootDir, '.git')) && gitInstalled) {
         // List all files that aren't gitignored, including those not checked
         // in to Git.
         return git.run(["ls-files", "--cached", "--others",
                         "--exclude-standard"]);
       }
 
-      return listDir(rootDir, recursive: true).then((entries) {
-        return entries
-            .where(fileExists) // Skip directories and broken symlinks.
-            .map((entry) => path.relative(entry, from: rootDir));
-      });
+      return listDir(rootDir, recursive: true)
+          .where(fileExists) // Skip directories and broken symlinks.
+          .map((entry) => path.relative(entry, from: rootDir));
     }).then((files) => files.where(_shouldPublish).toList());
   }
 
   /// Returns `true` if [file] should be published.
   bool _shouldPublish(String file) {
     if (_BLACKLISTED_FILES.contains(path.basename(file))) return false;
     return !path.split(file).any(_BLACKLISTED_DIRS.contains);
   }
 
   /// Returns the value associated with [key] in [map]. Throws a user-friendly
@@ skipping 36 matching lines @@
       return confirm(message).then((confirmed) {
         if (!confirmed) {
           log.error("Package upload canceled.");
           return false;
         }
         return true;
       });
     });
   }
 }