#!/usr/bin/env python2
#
#  Extract unique DUK_USE_xxx flags from current code base:
#
#    $ python extract_unique_options.py ../src/*.c ../src/*.h ../src/*.h.in
#

import os, sys, re

# DUK_USE_xxx/DUK_OPT_xxx are used as placeholders and not matched
# (only uppercase allowed)
re_use = re.compile(r'DUK_USE_[A-Z0-9_]+')
re_opt = re.compile(r'DUK_OPT_[A-Z0-9_]+')

def main():
	uses = {}
	opts = {}

	for fn in sys.argv[1:]:
		f = open(fn, 'rb')
		for line in f:
			for t in re.findall(re_use, line):
				if t[-1] != '_':  # skip e.g. 'DUK_USE_'
					uses[t] = True
			for t in re.findall(re_opt, line):
				if t[-1] != '_':
					opts[t] = True
		f.close()

	k = opts.keys()
	k.sort()
	for i in k:
		print(i)

	k = uses.keys()
	k.sort()
	for i in k:
		print(i)

if __name__ == '__main__':
	main()