mojo/tools/mopy/file_hash.py - Issue 878933003: Move the apptest runner and parts of mopy to the public SDK.

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Side by Side Diff: mojo/tools/mopy/file_hash.py

Issue 878933003: Move the apptest runner and parts of mopy to the public SDK. (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 5 years, 10 months ago

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1 # Copyright 2014 The Chromium Authors. All rights reserved.

2 # Use of this source code is governed by a BSD-style license that can be

3 # found in the LICENSE file.

4

5 import logging

6

7 # pylint: disable=E0611

8 from hashlib import sha256

9

10 from mopy.memoize import memoize

11

12 _logging = logging.getLogger()

13

14 @memoize

15 def file_hash(filename):

16 """Returns a string representing the hash of the given file."""

17 _logging.debug("Hashing %s ...", filename)

18 with open(filename, mode='rb') as f:

19 m = sha256()

20 while True:

21 block = f.read(4096)

22 if not block:

23 break

24 m.update(block)

25 _logging.debug(" => %s", m.hexdigest())

26 return m.hexdigest()

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