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# Copyright 2013 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Updates EnterprisePolicies enum in histograms.xml file with policy
definitions read from policies.yaml.
If the file was pretty-printed, the updated version is pretty-printed too.
"""
from __future__ import print_function
import os
import re
import sys
from ast import literal_eval
from optparse import OptionParser
from xml.dom import minidom
sys.path.append(os.path.join(os.path.dirname(__file__), '../../../third_party'))
import pyyaml
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
from diff_util import PromptUserToAcceptDiff
import path_util
import histogram_paths
import histogram_configuration_model
ENUMS_PATH = histogram_paths.ENUMS_XML
POLICY_LIST_PATH = 'components/policy/resources/templates/policies.yaml'
POLICIES_ENUM_NAME = 'EnterprisePolicies'
POLICY_ATOMIC_GROUPS_ENUM_NAME = 'PolicyAtomicGroups'
class UserError(Exception):
def __init__(self, message):
Exception.__init__(self, message)
@property
def message(self):
return self.args[0]
def UpdatePoliciesHistogramDefinitions(policy_ids, doc):
"""Sets the children of <enum name="EnterprisePolicies" ...> node in |doc| to
values generated from policy ids contained in |policy_templates|.
Args:
policy_ids: A dictionary mapping policy ids to their names.
doc: A minidom.Document object representing parsed histogram definitions
XML file.
"""
# Find EnterprisePolicies enum.
for enum_node in doc.getElementsByTagName('enum'):
if enum_node.attributes['name'].value == POLICIES_ENUM_NAME:
policy_enum_node = enum_node
break
else:
raise UserError('No policy enum node found')
# Remove existing values.
while policy_enum_node.hasChildNodes():
policy_enum_node.removeChild(policy_enum_node.lastChild)
# Add a "Generated from (...)" comment
comment = ' Generated from {0} '.format(POLICY_LIST_PATH)
policy_enum_node.appendChild(doc.createComment(comment))
# Add values generated from policy templates.
ordered_policies = [{
'id': id,
'name': name
} for id, name in policy_ids.items() if name]
ordered_policies.sort(key=lambda policy: policy['id'])
for policy in ordered_policies:
node = doc.createElement('int')
node.attributes['value'] = str(policy['id'])
node.attributes['label'] = policy['name']
policy_enum_node.appendChild(node)
def UpdateAtomicGroupsHistogramDefinitions(atomic_group_ids, doc):
"""Sets the children of <enum name="PolicyAtomicGroups" ...> node in |doc| to
values generated from policy ids contained in |policy_templates|.
Args:
atomic_group_ids: A dictionary mapping atomic policy goupr ids to their
names.
doc: A minidom.Document object representing parsed histogram definitions
XML file.
"""
# Find EnterprisePolicies enum.
for enum_node in doc.getElementsByTagName('enum'):
if enum_node.attributes['name'].value == POLICY_ATOMIC_GROUPS_ENUM_NAME:
atomic_group_enum_node = enum_node
break
else:
raise UserError('No policy atomic group enum node found')
# Remove existing values.
while atomic_group_enum_node.hasChildNodes():
atomic_group_enum_node.removeChild(atomic_group_enum_node.lastChild)
# Add a "Generated from (...)" comment
comment = ' Generated from {0} '.format(POLICY_LIST_PATH)
atomic_group_enum_node.appendChild(doc.createComment(comment))
# Add values generated from policy templates.
ordered_atomic_groups = [{
'id': id,
'name': name
} for id, name in atomic_group_ids.items() if name]
ordered_atomic_groups.sort(key=lambda group: group['id'])
for group in ordered_atomic_groups:
node = doc.createElement('int')
node.attributes['value'] = str(group['id'])
node.attributes['label'] = group['name']
atomic_group_enum_node.appendChild(node)
def main():
if len(sys.argv) > 1:
print('No arguments expected!', file=sys.stderr)
sys.stderr.write(__doc__)
sys.exit(1)
with open(os.path.join(POLICY_LIST_PATH), encoding='utf-8') as f:
policy_list_content = pyyaml.safe_load(f)
with open(ENUMS_PATH, 'rb') as f:
histograms_doc = minidom.parse(f)
f.seek(0)
xml = f.read().decode('utf-8')
UpdatePoliciesHistogramDefinitions(policy_list_content['policies'],
histograms_doc)
UpdateAtomicGroupsHistogramDefinitions(policy_list_content['atomic_groups'],
histograms_doc)
new_xml = histogram_configuration_model.PrettifyTree(histograms_doc)
if PromptUserToAcceptDiff(xml, new_xml, 'Is the updated version acceptable?'):
with open(ENUMS_PATH, 'wb') as f:
f.write(new_xml.encode('utf-8'))
if __name__ == '__main__':
try:
main()
except UserError as e:
print(e.message, file=sys.stderr)
sys.exit(1)
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