[PathList] Normalize @root to avoid issues with UTF8 paths

lib/cocoapods/sandbox/path_list.rb

+require 'active_support/multibyte/unicode'
+
 module Pod
   class Sandbox
     # The PathList class is designed to perform multiple glob matches against
@@ -20,7 +22,8 @@ module Pod
       # @param  [Pathname] root The root of the PathList.
       #
       def initialize(root)
-        @root = root
+        root_dir = ActiveSupport::Multibyte::Unicode.normalize(root.to_s)
+        @root = Pathname.new(root_dir)
         @glob_cache = {}
       end
 

spec/fixtures/ü/README

+README

spec/unit/sandbox/path_list_spec.rb

@@ -178,6 +178,13 @@ module Pod
         path_list = Sandbox::PathList.new(fixture('banana-lib'))
         path_list.files.should == %w(Classes/NSFetchedResultsController+Banana.h Classes/NSFetchRequest+Banana.h)
       end
+
+      it 'supports unicode paths' do
+        # Load fixture("ü") with chars ["u", "̈"] instead of ["ü"]
+        unicode_name = [117, 776].pack('U*')
+        path_list = Sandbox::PathList.new(fixture(unicode_name))
+        path_list.files.should == ['README']
+      end
     end
 
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