gistfile1.py

#!/usr/bin/env python
import sys
import urllib
import pprint
import optparse
import simplejson
 
CLOSURE_PARAMS = {
	'compilation_level': 'SIMPLE_OPTIMIZATIONS',
	'output_format': 'json',
}
 
CLOSURE_URL = 'http://closure-compiler.appspot.com/compile'
 
def print_section(title, data):
	print data
	print >> sys.stderr, title.capitalize()
	print >> sys.stderr, '=' * len(title)
	print >> sys.stderr, pprint.pformat(data) + '\n'
 
def minify(opts, args):
	params = CLOSURE_PARAMS.copy()
	params['js_code'] = concatenate(args)
 
	def load_info(kind):
		params['output_info'] = kind
		return simplejson.loads(urllib.urlopen(CLOSURE_URL, urllib.urlencode(params)).read())
 
	if opts.do_errors:
		errors = load_info('errors')
		if errors:
			print_section('errors', errors)
			sys.exit(1)
 
	if opts.do_warnings:
		warnings = load_info('warnings')
		if warnings:
			print_section('warnings', warnings['warnings'])
 
	if opts.do_statistics:
		print_section('statistics', load_info('statistics')['statistics'])
 
	print load_info('compiled_code')['compiledCode']
 
def concatenate(args):
	combined_js = ''
	for fname in args:
		combined_js += open(fname).read() + '\n'
	return combined_js.strip()
 
if __name__ == '__main__':
	parser = optparse.OptionParser()
	parser.add_option('--no-errors', dest='do_errors', action='store_false', default=True)
	parser.add_option('--no-warnings', dest='do_warnings', action='store_false', default=True)
	parser.add_option('--statistics', dest='do_statistics', action='store_true', default=False)
	parser.add_option('--concatenate-only', dest='concatenate', action='store_true', default=False)
	opts, args = parser.parse_args()
 
	if opts.concatenate:
		print concatenate(args)
	else:
		minify(opts, args)