Add Rake task to put in encoding headers. [#58]

lib/tasks/utf8encode.rake

@@ -0,0 +1,23 @@
+# from https://gist.github.com/738245
+
+desc "Manage the encoding header of Ruby files"
+task :utf8_encode_headers => :environment do
+  files = Array.new
+  ["*.rb", "*.rake"].each do |extension|
+    files.concat(Dir[ File.join(Dir.getwd.split(/\\/), "**", extension) ])
+  end
+
+  files.each do |file|
+    content = File.read(file)
+    next if content[0..16] == "# coding: UTF-8\n\n" ||
+            content[0..22] == "# -*- coding: utf-8 -*-"
+
+   ["\n\n", "\n"].each do |file_end|
+      content = content.gsub(/(# encoding: UTF-8#{file_end})|(# coding: UTF-8#{file_end})|(# -*- coding: UTF-8 -*-#{file_end})|(# -*- coding: utf-8 -*-#{file_end})/i, "")
+    end
+
+    new_file = File.open(file, "w")
+    new_file.write("# coding: UTF-8\n\n"+content)
+    new_file.close
+  end
+end