diff --git a/lib/jekyll.rb b/lib/jekyll.rb
index 02aa40b1..5beca7a5 100644
--- a/lib/jekyll.rb
+++ b/lib/jekyll.rb
@@ -55,6 +55,7 @@ module Jekyll
   autoload :PluginManager,       'jekyll/plugin_manager'
   autoload :Post,                'jekyll/post'
   autoload :Publisher,           'jekyll/publisher'
+  autoload :Reader,              'jekyll/reader'
   autoload :Regenerator,         'jekyll/regenerator'
   autoload :RelatedPosts,        'jekyll/related_posts'
   autoload :Renderer,            'jekyll/renderer'
diff --git a/lib/jekyll/collection.rb b/lib/jekyll/collection.rb
index b09a7ed9..4b07b2af 100644
--- a/lib/jekyll/collection.rb
+++ b/lib/jekyll/collection.rb
@@ -89,7 +89,7 @@ module Jekyll
     # Returns a String containing th directory name where the collection
     #   is stored on the filesystem.
     def directory
-      @directory ||= site.in_source_dir(relative_directory)
+      @directory ||= site.reader.in_source_dir(relative_directory)
     end
 
     # The full path to the directory containing the collection, with
@@ -102,7 +102,7 @@ module Jekyll
     #   is stored on the filesystem.
     def collection_dir(*files)
       return directory if files.empty?
-      site.in_source_dir(relative_directory, *files)
+      site.reader.in_source_dir(relative_directory, *files)
     end
 
     # Checks whether the directory "exists" for this collection.
diff --git a/lib/jekyll/convertible.rb b/lib/jekyll/convertible.rb
index d587f8f3..becc78ed 100644
--- a/lib/jekyll/convertible.rb
+++ b/lib/jekyll/convertible.rb
@@ -43,7 +43,7 @@ module Jekyll
     # Returns nothing.
     def read_yaml(base, name, opts = {})
       begin
-        self.content = File.read(site.in_source_dir(base, name),
+        self.content = File.read(site.reader.in_source_dir(base, name),
                                  merged_file_read_opts(opts))
         if content =~ /\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)/m
           self.content = $POSTMATCH
@@ -209,8 +209,8 @@ module Jekyll
 
         # Add layout to dependency tree
         site.regenerator.add_dependency(
-          site.in_source_dir(path),
-          site.in_source_dir(layout.path)
+          site.reader.in_source_dir(path),
+          site.reader.in_source_dir(layout.path)
         )
 
         if layout = layouts[layout.data["layout"]]
diff --git a/lib/jekyll/draft.rb b/lib/jekyll/draft.rb
index 16daefdf..4167f154 100644
--- a/lib/jekyll/draft.rb
+++ b/lib/jekyll/draft.rb
@@ -15,7 +15,7 @@ module Jekyll
 
     # Get the full path to the directory containing the draft files
     def containing_dir(dir)
-      site.in_source_dir(dir, '_drafts')
+      site.reader.in_source_dir(dir, '_drafts')
     end
 
     # The path to the draft source file, relative to the site source
diff --git a/lib/jekyll/layout.rb b/lib/jekyll/layout.rb
index c29f353f..81ba7f81 100644
--- a/lib/jekyll/layout.rb
+++ b/lib/jekyll/layout.rb
@@ -29,7 +29,7 @@ module Jekyll
       @site = site
       @base = base
       @name = name
-      @path = site.in_source_dir(base, name)
+      @path = site.reader.in_source_dir(base, name)
 
       self.data = {}
 
diff --git a/lib/jekyll/layout_reader.rb b/lib/jekyll/layout_reader.rb
index a8466beb..645d3cf8 100644
--- a/lib/jekyll/layout_reader.rb
+++ b/lib/jekyll/layout_reader.rb
@@ -38,7 +38,7 @@ module Jekyll
     end
 
     def layout_directory_inside_source
-      site.in_source_dir(site.config['layouts'])
+      site.reader.in_source_dir(site.config['layouts'])
     end
 
     def layout_directory_in_cwd
diff --git a/lib/jekyll/plugin_manager.rb b/lib/jekyll/plugin_manager.rb
index 64dea860..5abfd47c 100644
--- a/lib/jekyll/plugin_manager.rb
+++ b/lib/jekyll/plugin_manager.rb
@@ -82,7 +82,7 @@ module Jekyll
     # Returns an Array of plugin search paths
     def plugins_path
       if (site.config['plugins'] == Jekyll::Configuration::DEFAULTS['plugins'])
-        [site.in_source_dir(site.config['plugins'])]
+        [site.reader.in_source_dir(site.config['plugins'])]
       else
         Array(site.config['plugins']).map { |d| File.expand_path(d) }
       end
diff --git a/lib/jekyll/post.rb b/lib/jekyll/post.rb
index 780f40f7..5d48d180 100644
--- a/lib/jekyll/post.rb
+++ b/lib/jekyll/post.rb
@@ -91,7 +91,7 @@ module Jekyll
 
     # Get the full path to the directory containing the post files
     def containing_dir(dir)
-      site.in_source_dir(dir, '_posts')
+      site.reader.in_source_dir(dir, '_posts')
     end
 
     # Read the YAML frontmatter.
diff --git a/lib/jekyll/reader.rb b/lib/jekyll/reader.rb
new file mode 100644
index 00000000..10748b04
--- /dev/null
+++ b/lib/jekyll/reader.rb
@@ -0,0 +1,38 @@
+# encoding: UTF-8
+require 'csv'
+
+module Jekyll
+  class Reader
+    # Public: Initialize a new Reader.
+
+    # @return [Object]
+    def initialize(source, dest)
+      @source = source
+      @dest = dest
+    end
+
+    # Public: Prefix a given path with the source directory.
+    #
+    # paths - (optional) path elements to a file or directory within the
+    #         source directory
+    #
+    # Returns a path which is prefixed with the source directory.
+    def in_source_dir(*paths)
+      paths.reduce(@source) do |base, path|
+        Jekyll.sanitized_path(base, path)
+      end
+    end
+
+    # Public: Prefix a given path with the destination directory.
+    #
+    # paths - (optional) path elements to a file or directory within the
+    #         destination directory
+    #
+    # Returns a path which is prefixed with the destination directory.
+    def in_dest_dir(*paths)
+      paths.reduce(@dest) do |base, path|
+        Jekyll.sanitized_path(base, path)
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/jekyll/regenerator.rb b/lib/jekyll/regenerator.rb
index 0616fdd9..07273db6 100644
--- a/lib/jekyll/regenerator.rb
+++ b/lib/jekyll/regenerator.rb
@@ -19,7 +19,7 @@ module Jekyll
       case document
       when Post, Page
         document.asset_file? || document.data['regenerate'] ||
-          modified?(site.in_source_dir(document.relative_path))
+          modified?(site.reader.in_source_dir(document.relative_path))
       when Document
         !document.write? || document.data['regenerate'] || modified?(document.path)
       else
@@ -113,7 +113,7 @@ module Jekyll
     #
     # Returns the String path of the file.
     def metadata_file
-      site.in_source_dir('.jekyll-metadata')
+      site.reader.in_source_dir('.jekyll-metadata')
     end
 
     # Check if metadata has been disabled
diff --git a/lib/jekyll/renderer.rb b/lib/jekyll/renderer.rb
index f25ca343..fd58bff9 100644
--- a/lib/jekyll/renderer.rb
+++ b/lib/jekyll/renderer.rb
@@ -141,8 +141,8 @@ module Jekyll
 
         # Add layout to dependency tree
         site.regenerator.add_dependency(
-          site.in_source_dir(document.path),
-          site.in_source_dir(layout.path)
+          site.reader.in_source_dir(document.path),
+          site.reader.in_source_dir(layout.path)
         ) if document.write?
 
         if layout = site.layouts[layout.data["layout"]]
diff --git a/lib/jekyll/site.rb b/lib/jekyll/site.rb
index aadfb8d0..d8a1d7bf 100644
--- a/lib/jekyll/site.rb
+++ b/lib/jekyll/site.rb
@@ -10,7 +10,7 @@ module Jekyll
                   :show_drafts, :keep_files, :baseurl, :data, :file_read_opts,
                   :gems, :plugin_manager
 
-    attr_accessor :converters, :generators
+    attr_accessor :converters, :generators, :reader
     attr_reader   :regenerator
 
     # Public: Initialize a new Site.
@@ -28,6 +28,8 @@ module Jekyll
       @source              = File.expand_path(config['source']).freeze
       @dest                = File.expand_path(config['destination']).freeze
 
+      @reader = Reader.new(@source,@dest);
+
       # Initialize incremental regenerator
       @regenerator = Regenerator.new(self)
 
@@ -97,18 +99,6 @@ module Jekyll
       end
     end
 
-    # Public: Prefix a given path with the source directory.
-    #
-    # paths - (optional) path elements to a file or directory within the
-    #         source directory
-    #
-    # Returns a path which is prefixed with the source directory.
-    def in_source_dir(*paths)
-      paths.reduce(source) do |base, path|
-        Jekyll.sanitized_path(base, path)
-      end
-    end
-
     # Public: Prefix a given path with the destination directory.
     #
     # paths - (optional) path elements to a file or directory within the
@@ -116,9 +106,7 @@ module Jekyll
     #
     # Returns a path which is prefixed with the destination directory.
     def in_dest_dir(*paths)
-      paths.reduce(dest) do |base, path|
-        Jekyll.sanitized_path(base, path)
-      end
+      reader.in_dest_dir(*paths)
     end
 
     # The list of collections and their corresponding Jekyll::Collection instances.
@@ -165,7 +153,7 @@ module Jekyll
     #
     # Returns nothing.
     def read_directories(dir = '')
-      base = in_source_dir(dir)
+      base = reader.in_source_dir(dir)
       entries = Dir.chdir(base) { filter_entries(Dir.entries('.'), base) }
 
       read_posts(dir)
@@ -174,7 +162,7 @@ module Jekyll
       limit_posts! if limit_posts > 0 # limit the posts if :limit_posts option is set
 
       entries.each do |f|
-        f_abs = in_source_dir(base, f)
+        f_abs = reader.in_source_dir(base, f)
         if File.directory?(f_abs)
           f_rel = File.join(dir, f)
           read_directories(f_rel) unless dest.sub(/\/$/, '') == f_abs
@@ -232,7 +220,7 @@ module Jekyll
     #
     # Returns nothing
     def read_data(dir)
-      base = in_source_dir(dir)
+      base = reader.in_source_dir(dir)
       read_data_to(base, self.data)
     end
 
@@ -251,7 +239,7 @@ module Jekyll
       end
 
       entries.each do |entry|
-        path = in_source_dir(dir, entry)
+        path = reader.in_source_dir(dir, entry)
         next if File.symlink?(path) && safe
 
         key = sanitize_filename(File.basename(entry, '.*'))
@@ -454,10 +442,10 @@ module Jekyll
     #
     # Returns the list of entries to process
     def get_entries(dir, subfolder)
-      base = in_source_dir(dir, subfolder)
+      base = reader.in_source_dir(dir, subfolder)
       return [] unless File.exist?(base)
       entries = Dir.chdir(base) { filter_entries(Dir['**/*'], base) }
-      entries.delete_if { |e| File.directory?(in_source_dir(base, e)) }
+      entries.delete_if { |e| File.directory?(reader.in_source_dir(base, e)) }
     end
 
     # Aggregate post information
diff --git a/lib/jekyll/tags/include.rb b/lib/jekyll/tags/include.rb
index b809ffe7..fcac41b2 100644
--- a/lib/jekyll/tags/include.rb
+++ b/lib/jekyll/tags/include.rb
@@ -117,7 +117,7 @@ eos
         # Add include to dependency tree
         if context.registers[:page] and context.registers[:page].has_key? "path"
           site.regenerator.add_dependency(
-            site.in_source_dir(context.registers[:page]["path"]),
+            site.reader.in_source_dir(context.registers[:page]["path"]),
             path
           )
         end
@@ -135,7 +135,7 @@ eos
       end
 
       def resolved_includes_dir(context)
-        context.registers[:site].in_source_dir(@includes_dir)
+        context.registers[:site].reader.in_source_dir(@includes_dir)
       end
 
       def validate_path(path, dir, safe)
@@ -170,7 +170,7 @@ eos
       end
 
       def resolved_includes_dir(context)
-        context.registers[:site].in_source_dir(page_path(context))
+        context.registers[:site].reader.in_source_dir(page_path(context))
       end
     end
   end
diff --git a/test/test_regenerator.rb b/test/test_regenerator.rb
index 15819487..cc505e39 100644
--- a/test/test_regenerator.rb
+++ b/test/test_regenerator.rb
@@ -63,7 +63,7 @@ class TestRegenerator < JekyllUnitTest
       }))
 
       @site.process
-      @path = @site.in_source_dir(@site.pages.first.path)
+      @path = @site.reader.in_source_dir(@site.pages.first.path)
       @regenerator = @site.regenerator
     end