Converting Rails Numeric Migrations to Time Stamp

I looked on the web and couldn't find a good script to rename numeric migrations to timestamp ones when upgrading an application to a more recent rails (in this case so I can make it an engine).

	files = Dir['./db/migrate/*.rb'].sort
	now = Time.now.utc
	time = Time.utc(now.year, now.month, now.day)
	files.each do |full_file|
	file = File.basename(full_file)
	parts = file.split('_')
	raise "probably illegal file name #{file}" if parts.size < 2
	if parts[0].size < 7
	cmd = "svn move #{full_file} #{full_file.gsub(parts[0], time.to_i.to_s)}"
	puts cmd
	system cmd
	time += 1
	end
	end

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