Minify css and js using the yui compressor in rake

gistfile1.rb

# APP_PATH is your application root path
# YUI_COMPRESSOR_PATH is the path to the yuicompressor-x.x.x.jar
# Files are replaced. Designed to run over the build artifacts on the CI server

desc "Minify the javascript and css files that are within the artifacts folder"
task :minify => [:copy_artifacts] do
	#http://developer.yahoo.com/yui/compressor/
	puts "Minifying javascript"
	
	js_files = FileList["#{APP_PATH}/**/*.js"].exclude(/.min.js/)
	js_files.each do |js_file|
		sh "java -jar \"#{YUI_COMPRESSOR_PATH}\" #{js_file} -o #{js_file} --charset utf-8"
	end

	css_files = FileList["#{APP_PATH}/**/*.css"]
	css_files.each do |css_file|
		sh "java -jar \"#{YUI_COMPRESSOR_PATH}\" #{css_file} -o #{css_file} --charset utf-8"
	end
end