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#!/usr/bin/env python2
'''
This is a helper tool which is designed to make it possible
for other apps to read emscripten's configuration variables
in a unified way. Usage:
em-config VAR_NAME
This tool prints the value of the variable to stdout if one
is found, or exits with 1 if the variable does not exist.
'''
import os, sys, re
from tools import shared
if len(sys.argv) != 2 or \
not re.match(r"^[\w\W_][\w\W_\d]*$", sys.argv[1]) or \
not (sys.argv[1] in dir(shared)):
print 'Usage: em-config VAR_NAME'
exit(1)
print eval('shared.' + sys.argv[1])
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