jschung | 25850f0 | 2020-06-17 14:38:11 +0900 | [diff] [blame] | 1 | # Copyright 2020 Google LLC |
| 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | # you may not use this file except in compliance with the License. |
| 5 | # You may obtain a copy of the License at |
| 6 | # |
| 7 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | # |
| 9 | # Unless required by applicable law or agreed to in writing, software |
| 10 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | # See the License for the specific language governing permissions and |
| 13 | # limitations under the License. |
| 14 | |
| 15 | """Common functions for the stress tester.""" |
| 16 | |
| 17 | import logging |
| 18 | import os |
| 19 | |
| 20 | from absl import flags |
| 21 | import stress_test_pb2 |
| 22 | from google.protobuf import text_format |
| 23 | |
| 24 | FLAGS = flags.FLAGS |
| 25 | |
| 26 | flags.DEFINE_string("resource_path", None, |
| 27 | "Optional override path where to grab resources from. By " |
| 28 | "default, resources are grabbed from " |
| 29 | "stress_test_common.RESOURCE_DIR, specifying this flag " |
| 30 | "will instead result in first looking in this path before " |
| 31 | "the module defined resource directory.") |
| 32 | |
| 33 | RESOURCE_DIR = "resources/" |
| 34 | |
| 35 | |
| 36 | def MakeDirsIfNeeded(path): |
| 37 | """Helper function to create all the directories on a path.""" |
| 38 | if not os.path.isdir(path): |
| 39 | os.makedirs(path) |
| 40 | |
| 41 | |
| 42 | def GetResourceContents(resource_name): |
| 43 | """Gets a string containing the named resource.""" |
| 44 | # Look in the resource override folder first (just go with the basename to |
| 45 | # find the file, rather than the full path). |
| 46 | if FLAGS.resource_path: |
| 47 | path = os.path.join(FLAGS.resource_path, os.path.basename(resource_name)) |
| 48 | if os.path.exists(path): |
| 49 | return open(path, "rb").read() |
| 50 | |
| 51 | # If the full path exists, grab that, otherwise fall back to the basename. |
| 52 | if os.path.exists(resource_name): |
| 53 | return open(resource_name, "rb").read() |
| 54 | return open(os.path.join(RESOURCE_DIR, os.path.basename(resource_name)), |
| 55 | "rb").read() |
| 56 | |
| 57 | |
| 58 | def LoadDeviceConfig(device_type, serial_number): |
| 59 | """Assembles a DeviceConfig proto following all includes, or the default.""" |
| 60 | |
| 61 | config = stress_test_pb2.DeviceConfig() |
| 62 | text_format.Merge(GetResourceContents( |
| 63 | os.path.join(RESOURCE_DIR, "device_config.common.ascii_proto")), config) |
| 64 | def RecursiveIncludeToConfig(resource_prefix, print_error): |
| 65 | """Load configurations recursively.""" |
| 66 | try: |
| 67 | new_config = stress_test_pb2.DeviceConfig() |
| 68 | text_format.Merge(GetResourceContents( |
| 69 | os.path.join(RESOURCE_DIR, |
| 70 | "device_config.%s.ascii_proto" % resource_prefix)), |
| 71 | new_config) |
| 72 | for include_name in new_config.include: |
| 73 | # If we've managed to import this level properly, then we should print |
| 74 | # out any errors if we hit them on the included files. |
| 75 | RecursiveIncludeToConfig(include_name, print_error=True) |
| 76 | config.MergeFrom(new_config) |
| 77 | except IOError as err: |
| 78 | if print_error: |
| 79 | logging.error(str(err)) |
| 80 | |
| 81 | RecursiveIncludeToConfig(device_type, print_error=True) |
| 82 | RecursiveIncludeToConfig(serial_number, print_error=False) |
| 83 | |
| 84 | def TakeOnlyLatestFromRepeatedField(message, field, key): |
| 85 | """Take only the latest version.""" |
| 86 | old_list = list(getattr(message, field)) |
| 87 | message.ClearField(field) |
| 88 | new_list = [] |
| 89 | for i in range(len(old_list) - 1, -1, -1): |
| 90 | element = old_list[i] |
| 91 | if not any([getattr(x, key) == getattr(element, key) |
| 92 | for x in old_list[i + 1:]]): |
| 93 | new_list.append(element) |
| 94 | getattr(message, field).extend(reversed(new_list)) |
| 95 | |
| 96 | # We actually need to do a bit of post-processing on the proto - we only want |
| 97 | # to take the latest version for each (that way people can override stuff if |
| 98 | # they want) |
| 99 | TakeOnlyLatestFromRepeatedField(config, "file_to_watch", "source") |
| 100 | TakeOnlyLatestFromRepeatedField(config, "file_to_move", "source") |
| 101 | TakeOnlyLatestFromRepeatedField(config, "event", "name") |
| 102 | TakeOnlyLatestFromRepeatedField(config, "daemon_process", "name") |
| 103 | |
| 104 | return config |