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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import buildconfig
import collections
import re
import StringIO
import sys
def read_conf(conf_filename):
# Can't read/write from a single StringIO, so make a new one for reading.
stream = open(conf_filename, 'rU')
def parse_counters(stream):
for line_num, line in enumerate(stream):
line = line.rstrip('\n')
if not line or line.startswith('//'):
# empty line or comment
continue
m = re.match(r'method ([A-Za-z0-9]+)\.([A-Za-z0-9]+)$', line)
if m:
interface_name, method_name = m.groups()
yield { 'type': 'method',
'interface_name': interface_name,
'method_name': method_name }
continue
m = re.match(r'attribute ([A-Za-z0-9]+)\.([A-Za-z0-9]+)$', line)
if m:
interface_name, attribute_name = m.groups()
yield { 'type': 'attribute',
'interface_name': interface_name,
'attribute_name': attribute_name }
continue
m = re.match(r'property ([A-Za-z0-9]+)$', line)
if m:
property_name = m.group(1)
yield { 'type': 'property',
'property_name': property_name }
continue
raise ValueError('error parsing %s at line %d' % (conf_filename, line_num))
return parse_counters(stream)
def generate_histograms(filename):
# The mapping for use counters to telemetry histograms depends on the
# ordering of items in the dictionary.
items = collections.OrderedDict()
for counter in read_conf(filename):
def append_counter(name, desc):
items[name] = { 'expires_in_version': 'never',
'kind' : 'boolean',
'description': desc }
def append_counters(name, desc):
append_counter('USE_COUNTER2_%s_DOCUMENT' % name, 'Whether a document %s' % desc)
append_counter('USE_COUNTER2_%s_PAGE' % name, 'Whether a page %s' % desc)
if counter['type'] == 'method':
method = '%s.%s' % (counter['interface_name'], counter['method_name'])
append_counters(method.replace('.', '_').upper(), 'called %s' % method)
elif counter['type'] == 'attribute':
attr = '%s.%s' % (counter['interface_name'], counter['attribute_name'])
counter_name = attr.replace('.', '_').upper()
append_counters('%s_getter' % counter_name, 'got %s' % attr)
append_counters('%s_setter' % counter_name, 'set %s' % attr)
elif counter['type'] == 'property':
prop = counter['property_name']
append_counters('PROPERTY_%s' % prop.replace('-', '_').upper(), "used the '%s' property" % prop)
return items
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