#!/usr/bin/env python
# coding: utf-8

from hashlib import sha1 as hasher
import os
import sys
from multiprocessing import Pool, Manager


active = True


def get_hash(q):
	h = hasher()
	while active or not q.empty():
		with open(q.get(), 'rb') as f:
			for chunk in iter(lambda: f.read(2047), b''):
				h.update(chunk)
		print('{}\t{}'.format(path, h.hexdigest()))


def find(target):
	if os.path.isdir(target):
	    for root, dirs, files in os.walk(target):
	        for file in files:
	            yield os.path.join(root, file)
	else:
		yield target


def main():
    if len(sys.argv) < 2:
    	sys.exit(1)
    for target in sys.argv[1:]:
    	with Pool(processes=4) as pool:
    		q = Manager().Queue()
    		pool.map(get_hash, (q,))
	    	for path in find(target):
	    		q.put(path)
	    	active = False


if __name__ == '__main__':
    main()