Detection of the wordlist charset

lib/common/hacks.rb

@@ -70,3 +70,12 @@ def puts(o = '')
   end
   super(o)
 end
+
+class File
+  # @param [ String ] file_path
+  #
+  # @return [ String ] The charset of the file
+  def self.charset(file_path)
+    %x{file -i #{file_path}}[%r{charset=([^\n]+)\n}, 1]
+  end
+end