Sample script to call google closure

gistfile1.py

import dircache
import os
import os.path
import fnmatch

# change these as needed

js_dirs = ["js/", "js/lib/"]
output_file = "output.js"
jar_path = "lib/java/"
compilation_level = "ADVANCED_OPTIMIZATIONS"

# you generally shouldn't need to change any of this

js_ext = ".js"

def files(dir):
    return filter(lambda f: f.endswith(js_ext), map(lambda f: dir + f, dircache.listdir(dir)))

def all_files():
    lists = map(files, js_dirs)
    return [item for sublist in lists for item in sublist]

cmd_prefix = "java -jar " + jar_path + "compiler.jar"

file_list = all_files()

js_file_str = ' '.join(map(lambda f: "--js " + f, file_list))

cmd = "%s --compilation_level %s %s --js_output_file %s" % (cmd_prefix, compilation_level, js_file_str, output_file)

print cmd
os.system(cmd)