Auto-Compress *.css or *.js

compressor.py

#!/usr/bin/python

# Author: Guokai
# CreateDate: 2011-07-26
# Description: This script executed to auto-compress *.css or *.js files.
# Rely: YUI-compressor-x.y.z

# Usage (anyone below):
# --- compressor.py *.js
# --- compressor.py demo.css
# --- compressor.py *.js *.css
# --- compressor.py in.js style.css

# for example,if you use compressor.py style.css motools.js in-min.js,these files will be changed:
# style.css	----->	style-compressor-source.css (un-compressed) && style.css (compressed)
# mootools.js	----->	mootools-compressor-source.js (un-compressed) && mootools.js (compressed)
# in-min.js	----->	in-min.js (will skip and not compress it)

import os,sys,fnmatch,re

compressor_path='E:\\Tools\\yuicompressor-2.4.6\\build\\yuicompressor-2.4.6.jar'
compressor_charset='utf-8'
arg=sys.argv[1:]

def compressor(file):
	return '-min'.join([os.path.splitext(file)[0],os.path.splitext(file)[1]])

def walk(path,pattern):
	arr=[]
	for i in pattern:
		for root,dirs,files in os.walk(path):
			for filename in fnmatch.filter(files,i):
				# skip the files which have already been minified
				if(not re.match(r'(.*(-min|\.min|-compressor-source)\..*)',filename)):
					arr.append(os.path.join(root,filename))
	return arr;

def compress(files):
	for file in files:
		print(file+'\t-> [OK]')
		os.system('java -jar %s %s -o %s --charset %s --preserve-semi' % (compressor_path,file,compressor(file),compressor_charset))
		try:
			os.rename(file,re.sub(r'\.(?P<ext>css|js)$','-compressor-source.\g<ext>',file))
			os.rename(compressor(file),re.sub(r'-min\.(?P<ext>css|js)$','.\g<ext>',compressor(file)))
		except:
			print('There\'s some errors happened!')

# can't excuted without parameters
if(len(arg)<2):
	print('>>> Usage:\t compressor.py directory_name file1 file2 ... file{n}')
	print('>>> Example:\t compressor.py document *.js *.css demo.css')
	sys.exit(0)
else:
	path=arg.pop(0)
	pattern=arg
	files=walk(path,pattern)
	compress(files)