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# Copyright 2019 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.
import os
import sys
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import models
# Helpers
# A key for sorting XML nodes by the value of |attribute|.
_LOWERCASE_FN = lambda attribute: (lambda node: node.get(attribute).lower())
# A constant function as the sorting key for nodes whose orderings should be
# kept as given in the XML file within their parent node.
_KEEP_ORDER = lambda node: 1
# Model definitions
_OBSOLETE_TYPE = models.TextNodeType('obsolete')
_OWNER_TYPE = models.TextNodeType('owner', single_line=True)
_SUMMARY_TYPE = models.TextNodeType('summary')
_METRIC_TYPE = models.ObjectNodeType(
'metric',
attributes=[
('name', unicode, r'^[A-Za-z0-9_.]+$'),
('kind', unicode, r'^(?i)(|hashed-string|int)$'),
],
alphabetization=[
(_OBSOLETE_TYPE.tag, lambda _: 1),
(_SUMMARY_TYPE.tag, lambda _: 2),
],
children=[
models.ChildType(_OBSOLETE_TYPE.tag, _OBSOLETE_TYPE, multiple=False),
models.ChildType(_OWNER_TYPE.tag, _OWNER_TYPE, multiple=True),
models.ChildType(_SUMMARY_TYPE.tag, _SUMMARY_TYPE, multiple=False),
])
_EVENT_TYPE = models.ObjectNodeType(
'event',
attributes=[
('name', unicode, r'^[A-Z][A-Za-z0-9.]*$'),
('project', unicode, r'^([A-Z][A-Za-z0-9.]*)?$'),
],
alphabetization=[
(_OBSOLETE_TYPE.tag, lambda _: 1),
(_OWNER_TYPE.tag, lambda _: 2),
(_SUMMARY_TYPE.tag, lambda _: 3),
(_METRIC_TYPE.tag, _LOWERCASE_FN('name')),
],
extra_newlines=(1, 1, 1),
children=[
models.ChildType(_OBSOLETE_TYPE.tag, _OBSOLETE_TYPE, multiple=False),
models.ChildType(_OWNER_TYPE.tag, _OWNER_TYPE, multiple=True),
models.ChildType(_SUMMARY_TYPE.tag, _SUMMARY_TYPE, multiple=False),
models.ChildType(_METRIC_TYPE.tag, _METRIC_TYPE, multiple=True),
])
_EVENTS_TYPE = models.ObjectNodeType(
'events',
alphabetization=[(_EVENT_TYPE.tag, _LOWERCASE_FN('name'))],
extra_newlines=(2, 1, 1),
indent=False,
children=[
models.ChildType(_EVENT_TYPE.tag, _EVENT_TYPE, multiple=True),
])
_PROJECT_TYPE = models.ObjectNodeType(
'project',
attributes=[
('name', unicode, r'^[A-Z][A-Za-z0-9.]*$'),
],
alphabetization=[
(_OBSOLETE_TYPE.tag, lambda _: 1),
(_OWNER_TYPE.tag, lambda _: 2),
(_SUMMARY_TYPE.tag, lambda _: 3),
],
extra_newlines=(1, 1, 1),
children=[
models.ChildType(_OBSOLETE_TYPE.tag, _OBSOLETE_TYPE, multiple=False),
models.ChildType(_OWNER_TYPE.tag, _OWNER_TYPE, multiple=True),
models.ChildType(_SUMMARY_TYPE.tag, _SUMMARY_TYPE, multiple=False),
])
_PROJECTS_TYPE = models.ObjectNodeType(
'projects',
alphabetization=[(_PROJECT_TYPE.tag, _LOWERCASE_FN('name'))],
extra_newlines=(2, 1, 1),
indent=False,
children=[
models.ChildType(_PROJECT_TYPE.tag, _PROJECT_TYPE, multiple=True),
])
CONFIGURATION_TYPE = models.ObjectNodeType(
'structured-metrics',
alphabetization=[
(_EVENTS_TYPE.tag, lambda _: 1),
(_PROJECTS_TYPE.tag, lambda _: 2),
],
extra_newlines=(2, 1, 1),
indent=False,
children=[
models.ChildType(_EVENTS_TYPE.tag, _EVENTS_TYPE, multiple=False),
models.ChildType(_PROJECTS_TYPE.tag, _PROJECTS_TYPE, multiple=False),
])
XML_TYPE = models.DocumentType(CONFIGURATION_TYPE)
def PrettifyXML(original_xml):
"""Parses the original xml and return a pretty printed version.
Args:
original_xml: A string containing the original xml file contents.
Returns:
A pretty-printed xml string, or None if the config contains errors.
"""
config = XML_TYPE.Parse(original_xml)
return XML_TYPE.PrettyPrint(config)
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