Index: infra_libs/experiments.py |
diff --git a/infra_libs/experiments.py b/infra_libs/experiments.py |
deleted file mode 100644 |
index 7a85037febf39748903b90756d6281783dc9eb99..0000000000000000000000000000000000000000 |
--- a/infra_libs/experiments.py |
+++ /dev/null |
@@ -1,45 +0,0 @@ |
-# Copyright 2015 The Chromium Authors. All rights reserved. |
-# Use of this source code is governed by a BSD-style license that can be |
-# found in the LICENSE file. |
- |
-"""Tools for gradually enabling a feature on a deterministic set of machines. |
- |
-Add a flag to your program to control the percentage of machines that a new |
-feature should be enabled on:: |
- |
- def add_argparse_options(self, parser): |
- parser.add_argument('--myfeature-percent', type=int, default=0) |
- |
- def main(self, opts): |
- if experiments.is_active_for_host('myfeature', opts.myfeature_percent): |
- # do myfeature |
-""" |
- |
-import hashlib |
-import logging |
-import socket |
-import struct |
- |
- |
-def _is_active(labels, percent): |
- h = hashlib.md5() |
- for label, value in sorted(labels.iteritems()): |
- h.update(label) |
- h.update(value) |
- |
- # The first 8 bytes of the hash digest as an unsigned integer. |
- hash_num = struct.unpack_from('Q', h.digest())[0] |
- |
- return (hash_num % 100) < percent |
- |
- |
-def is_active_for_host(experiment_name, percent): |
- ret = _is_active({ |
- 'name': experiment_name, |
- 'host': socket.getfqdn(), |
- }, percent) |
- |
- if ret: |
- logging.info('Experiment "%s" is active', experiment_name) |
- |
- return ret |