A few tweaks to git support.

bin/piston

@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby
+#! /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
 require "piston"
 
 # Chain to the real command-line client

lib/piston/git/commit.rb

@@ -31,11 +31,13 @@ def each
           @dir.find do |path|
             Find.prune if path.to_s =~ %r{/[.]git}
             next if @dir == path
+            next if File.directory?(path)
             yield path.relative_path_from(@dir)
           end
         end
 
         def copy_to(relpath, abspath)
+          Pathname.new(abspath).dirname.mkpath rescue nil
           FileUtils.cp(@dir + relpath, abspath)
         end
       end

lib/piston/working_copy.rb

@@ -12,7 +12,7 @@ def logger
       end
 
       def guess(path)
-        path = path.kind_of?(Pathname) ? path : Pathname.new(path)
+        path = path.kind_of?(Pathname) ? path : Pathname.new(path.to_s)
         logger.debug {"Guessing the working copy type of #{path.inspect}"}
         handler = handlers.detect do |handler|
           logger.debug {"Asking #{handler.name} if it understands #{path}"}