gistfile1.py

def f(a):
	if a is full file path:
		return a
	elif a is a full directory path:
		ret = []
		for line in readfile(a+orderfile):
			if line starts with "/" or has ":/":
				ret += f(line)
			else: # relative path
				ret += f(a+"/"+line)
	elif a is regex:
		ret = []
		for b in glob(a):
			ret += f(a)
		return ret