#! /usr/bin/env python3
# vim: set tabstop=4 shiftwidth=4 noexpandtab filetype=python:

import sys
from pkg_resources import parse_version

def usage():
	print("Usage: compare_version <version> <operator> <version>")
	print("    where operator is one of lt, le, eq, ge, gt, or ne")
	sys.exit(2)

if len(sys.argv) != 4:
	usage()

ver1 = parse_version(sys.argv[1])
ver2 = parse_version(sys.argv[3])

# I suppose you could do something clever with meta-method mapping here
result = False
if sys.argv[2] == 'lt':
	result = ver1 < ver2
elif sys.argv[2] == 'le':
	result = ver1 <= ver2
elif sys.argv[2] == 'eq':
	result = ver1 == ver2
elif sys.argv[2] == 'ge':
	result = ver1 >= ver2
elif sys.argv[2] == 'gt':
	result = ver1 > ver2
elif sys.argv[2] == 'ne':
	result = ver1 != ver2
else:
	usage()

sys.exit(0 if result else 1)