aboutsummaryrefslogtreecommitdiffhomepage
path: root/tools/builder_name_schema.py
blob: 31a5cca3cfe9482ae8272b8b412587efcf5fe69b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
# Copyright 2014 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.


""" Utilities for dealing with builder names. This module obtains its attributes
dynamically from builder_name_schema.json. """


import json
import os


# All of these global variables are filled in by _LoadSchema().

# The full schema.
BUILDER_NAME_SCHEMA = None

# Character which separates parts of a builder name.
BUILDER_NAME_SEP = None

# Builder roles.
BUILDER_ROLE_CANARY = 'Canary'
BUILDER_ROLE_BUILD = 'Build'
BUILDER_ROLE_HOUSEKEEPER = 'Housekeeper'
BUILDER_ROLE_INFRA = 'Infra'
BUILDER_ROLE_PERF = 'Perf'
BUILDER_ROLE_TEST = 'Test'
BUILDER_ROLES = (BUILDER_ROLE_CANARY,
                 BUILDER_ROLE_BUILD,
                 BUILDER_ROLE_HOUSEKEEPER,
                 BUILDER_ROLE_INFRA,
                 BUILDER_ROLE_PERF,
                 BUILDER_ROLE_TEST)

# Suffix which distinguishes trybots from normal bots.
TRYBOT_NAME_SUFFIX = None


def _LoadSchema():
  """ Load the builder naming schema from the JSON file. """

  def _UnicodeToStr(obj):
    """ Convert all unicode strings in obj to Python strings. """
    if isinstance(obj, unicode):
      return str(obj)
    elif isinstance(obj, dict):
      return dict(map(_UnicodeToStr, obj.iteritems()))
    elif isinstance(obj, list):
      return list(map(_UnicodeToStr, obj))
    elif isinstance(obj, tuple):
      return tuple(map(_UnicodeToStr, obj))
    else:
      return obj

  builder_name_json_filename = os.path.join(
      os.path.dirname(__file__), 'builder_name_schema.json')
  builder_name_schema_json = json.load(open(builder_name_json_filename))

  global BUILDER_NAME_SCHEMA
  BUILDER_NAME_SCHEMA = _UnicodeToStr(
      builder_name_schema_json['builder_name_schema'])

  global BUILDER_NAME_SEP
  BUILDER_NAME_SEP = _UnicodeToStr(
      builder_name_schema_json['builder_name_sep'])

  global TRYBOT_NAME_SUFFIX
  TRYBOT_NAME_SUFFIX = _UnicodeToStr(
      builder_name_schema_json['trybot_name_suffix'])

  # Since the builder roles are dictionary keys, just assert that the global
  # variables above account for all of them.
  assert len(BUILDER_ROLES) == len(BUILDER_NAME_SCHEMA)
  for role in BUILDER_ROLES:
    assert role in BUILDER_NAME_SCHEMA


_LoadSchema()


def MakeBuilderName(role, extra_config=None, is_trybot=False, **kwargs):
  schema = BUILDER_NAME_SCHEMA.get(role)
  if not schema:
    raise ValueError('%s is not a recognized role.' % role)
  for k, v in kwargs.iteritems():
    if BUILDER_NAME_SEP in v:
      raise ValueError('%s not allowed in %s.' % (BUILDER_NAME_SEP, v))
    if not k in schema:
      raise ValueError('Schema does not contain "%s": %s' %(k, schema))
  if extra_config and BUILDER_NAME_SEP in extra_config:
    raise ValueError('%s not allowed in %s.' % (BUILDER_NAME_SEP,
                                                extra_config))
  name_parts = [role]
  name_parts.extend([kwargs[attribute] for attribute in schema])
  if extra_config:
    name_parts.append(extra_config)
  if is_trybot:
    name_parts.append(TRYBOT_NAME_SUFFIX)
  return BUILDER_NAME_SEP.join(name_parts)


def BuilderNameFromObject(obj, is_trybot=False):
  """Create a builder name based on properties of the given object.

  Args:
      obj: the object from which to create the builder name. The object must
          have as properties:
          - A valid builder role, as defined in the JSON file
          - All properties listed in the JSON file for that role
          - Optionally, an extra_config property
      is_trybot: bool; whether or not the builder is a trybot.
  Returns:
      string which combines the properties of the given object into a valid
          builder name.
  """
  schema = BUILDER_NAME_SCHEMA.get(obj.role)
  if not schema:
    raise ValueError('%s is not a recognized role.' % obj.role)
  name_parts = [obj.role]
  for attr_name in schema:
    attr_val = getattr(obj, attr_name)
    name_parts.append(attr_val)
  extra_config = getattr(obj, 'extra_config', None)
  if extra_config:
    name_parts.append(extra_config)
  if is_trybot:
    name_parts.append(TRYBOT_NAME_SUFFIX)
  return BUILDER_NAME_SEP.join(name_parts)


def IsTrybot(builder_name):
  """ Returns true if builder_name refers to a trybot (as opposed to a
  waterfall bot). """
  return builder_name.endswith(TRYBOT_NAME_SUFFIX)


def GetWaterfallBot(builder_name):
  """Returns the name of the waterfall bot for this builder. If it is not a
  trybot, builder_name is returned unchanged. If it is a trybot the name is
  returned without the trybot suffix."""
  if not IsTrybot(builder_name):
    return builder_name
  return _WithoutSuffix(builder_name, BUILDER_NAME_SEP + TRYBOT_NAME_SUFFIX)


def TrybotName(builder_name):
  """Returns the name of the trybot clone of this builder.

  If the given builder is a trybot, the name is returned unchanged. If not, the
  TRYBOT_NAME_SUFFIX is appended.
  """
  if builder_name.endswith(TRYBOT_NAME_SUFFIX):
    return builder_name
  return builder_name + BUILDER_NAME_SEP + TRYBOT_NAME_SUFFIX


def _WithoutSuffix(string, suffix):
  """ Returns a copy of string 'string', but with suffix 'suffix' removed.
  Raises ValueError if string does not end with suffix. """
  if not string.endswith(suffix):
    raise ValueError('_WithoutSuffix: string %s does not end with suffix %s' % (
        string, suffix))
  return string[:-len(suffix)]


def DictForBuilderName(builder_name):
  """Makes a dictionary containing details about the builder from its name."""
  split_name = builder_name.split(BUILDER_NAME_SEP)

  def pop_front():
    try:
      return split_name.pop(0)
    except:
      raise ValueError('Invalid builder name: %s' % builder_name)

  result = {'is_trybot': False}

  if split_name[-1] == TRYBOT_NAME_SUFFIX:
    result['is_trybot'] = True
    split_name.pop()

  if split_name[0] in BUILDER_NAME_SCHEMA.keys():
    key_list = BUILDER_NAME_SCHEMA[split_name[0]]
    result['role'] = pop_front()
    for key in key_list:
      result[key] = pop_front()
    if split_name:
      result['extra_config'] = pop_front()
    if split_name:
      raise ValueError('Invalid builder name: %s' % builder_name)
  else:
    raise ValueError('Invalid builder name: %s' % builder_name)
  return result