rakefile in nyara-0.0.1.pre.3 vs rakefile in nyara-0.0.1.pre.4

@@ -9,11 +9,11 @@
 
 desc "code generate"
 task :gen => [status_file, version_file]
 
 desc "generate #{status_file}"
-file status_file do
+file status_file => __FILE__ do
   puts "generating: #{status_file}"
   require "nokogiri"
   require "open-uri"
   f = File.open status_file, 'w'
   f.puts "#define HTTP_STATUS_CODES(XX)\\"
@@ -26,16 +26,16 @@
   f.puts "// end define"
   f.close
 end
 
 desc "generate #{version_file}"
-file version_file => 'nyara.gemspec' do
+file version_file => ['nyara.gemspec', __FILE__] do
   puts "generating: #{version_file}"
   lines = File.readlines('nyara.gemspec')
   version = nil
   lines.each do |line|
     if line =~ /s\.version =/
-      version = line[/\d+(\.\d+)*(\.pre)?/]
+      version = line[/\d+(\.\d+)*(\.pre\d+)?/]
       break
     end
   end
   abort 'version not found' unless version
   File.open version_file, 'w' do |f|