A obfuscator for JS & CSS

Gemfile

source "http://rubygems.org"

gem "json"
gem "uglifier"
gem "sass"

Rakefile

# -*- coding: utf-8 -*-
# A obfuscator for JS & CSS
# author jinze@corp.netease.com
# at least need ( ruby 1.9 || JRuby 1.6.5 && JRUBY_OPTS="--1.9" ) && NodeJS

require "uglifier"
require "sass"
require "rake/clean"

#Change it if the work dir is not same as the rake file.
#Dir.chdir("WebRoot")

ExecJS.runtime = ExecJS::Runtimes::Node	#need NodeJS
MultiJson.engine = :json_gem	#(encode bug on JRuby)
#MultiJson.engine = :ok_json	#(encode bug, defalut but slow?)
#MultiJson.engine = :yajl		#(encode bug && couldn't run under JRuby 1.6.4 && ruby 1.9.2)
#MultiJson.engine = :json_pure	#(a little slow...but encode right on JRuby)

#Obfuscate config
develop_dir		= "d"
release_dir		= "r"
css_prefix		= "c"
js_prefix		= "j"
css_source_dir	= "src/css"
js_source_dir	= "src/js"
build_temp_dir	= "temp"

CLEAN.include(build_temp_dir)
CLOBBER.include(release_dir)

task :default => ["combineJS", "combineCSS", "clean"]

SRC_ENCODING = 'gb18030'

#JS配置
JS_DEV = FileList["#{develop_dir}/#{js_prefix}/*.js"]
JS_RLS = JS_DEV.sub(Regexp.new("^#{develop_dir}"), "#{release_dir}")
JS_SRC = FileList["#{js_source_dir}/**/*.js"]
JS_OFS = JS_SRC.sub(Regexp.new("^#{js_source_dir}"), "#{build_temp_dir}/#{js_source_dir}")

#CSS配置
CSS_DEV = FileList["#{develop_dir}/#{css_prefix}/*.js"]
CSS_RLS = CSS_DEV.sub(Regexp.new("^#{develop_dir}"), "#{release_dir}").ext(newext="css")
CSS_SRC = FileList["#{css_source_dir}/**/*.css"]
CSS_OFS = CSS_SRC.sub(Regexp.new("^#{css_source_dir}"), "#{build_temp_dir}/#{css_source_dir}").ext(newext="css")

#生成混淆的临时JS文件
JS_SRC.each do |src|
	obj = "#{build_temp_dir}/#{src}"
	file obj => src do
		puts "Obfuscating #{src} ==> #{obj}"
		FileUtils.mkdir_p(File.dirname(obj)) #unless File.directory?(File.dirname(obj)) == false
		File.open(obj, 'w') do |file|
			file << Uglifier.compile(File.read(src).force_encoding(SRC_ENCODING), :ascii_only => false, :copyright => false).encode(SRC_ENCODING) + ';'
		end
	end
end

#生成混淆的临时CSS文件
CSS_SRC.each do |src|
	obj = "#{build_temp_dir}/#{src}"
	file obj => src do
		puts "Obfuscating #{src} ==> #{obj}"
		FileUtils.mkdir_p(File.dirname(obj)) #unless File.directory?(File.dirname(obj)) == false
		File.open(obj, 'w') do |file|
			file << Sass::Engine.new(File.read(src).force_encoding(SRC_ENCODING), :syntax => :scss, :style => :compressed).render.encode(SRC_ENCODING)
		end
	end
end

#合并混效后的JS文件
JS_DEV.each do |src|

	filelist = []

	File.new(src, 'r').each_line do |line|
		line.scan(/(['"])(.*?)\1/) do |m|
			filename = m[1]
			filelist.push "#{build_temp_dir}/#{js_source_dir}/#{filename}"
		end
	end

	rls = src.sub(Regexp.new("^#{develop_dir}"), "#{release_dir}")

	file rls => filelist  do
		FileUtils.mkdir_p(File.dirname(rls))
		File.open(rls, 'w') do |file|
			filelist.each do |fn|
				# file.puts "/* #{fn} */"
				file.puts File.read(fn)
			end
		end
		puts "Combined #{rls}"
	end
end

#合并混效后的CSS文件
CSS_DEV.each do |src|

	filelist = []

	File.new(src, 'r').each_line do |line|
		line.scan(/(['"])(.*?)\1/) do |m|
			filename = m[1]
			filelist.push "#{build_temp_dir}/#{css_source_dir}/#{filename}"
		end
	end

	rls = src.sub(Regexp.new("^#{develop_dir}"), "#{release_dir}").sub(Regexp.new(".js$"), ".css")
	file rls => filelist  do
		FileUtils.mkdir_p(File.dirname(rls))
		File.open(rls, 'w') do |file|
			filelist.each do |fn|
				# file.puts "/* #{fn} */"
				file.puts File.read(fn)
			end
		end
		puts "Combined #{rls}"
	end
end

task :combineJS => JS_RLS

task :obfusJS => JS_OFS

task :combineCSS => CSS_RLS

task :obfusCSS => CSS_OFS