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#!/usr/bin/python
# Copyright (c) 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.
"""Utility to rename a config in some subset of our GM expectation files.
Created for http://skbug.com/2752 ('split existing "gpu" GM results into "gl"
and "gles"')
Run with -h to see usage.
Example command lines:
rename_config.py gpu gles '.*Android.*'
TODO(epoger): Once https://codereview.chromium.org/397103003/ is committed,
we should add a unittest. Until then, we can test this as follows:
OLD=expectations/gm && NEW=/tmp/expectations && \
rm -rf $NEW && \
cp -a $OLD $NEW && \
gm/rename_config.py msaa4 gles-msaa4 '.*Android.*' \
--expectations-root $NEW && \
diff --recursive $OLD $NEW
"""
__author__ = 'Elliot Poger'
import argparse
import os
import re
import gm_json
DEFAULT_EXPECTATIONS_ROOT = os.path.join(
os.path.dirname(__file__), os.pardir, 'expectations', 'gm')
IMAGE_FILENAME_RE = re.compile(gm_json.IMAGE_FILENAME_PATTERN)
class Renamer(object):
def __init__(self, args):
"""
Params:
args: the Namespace object generated by argparse.parse_args()
"""
self._args = args
def run(self):
"""Perform all the subsitutions."""
for path in self._get_file_list():
self._rename_config(path=path,
old=self._args.old_config_name,
new=self._args.new_config_name)
def _rename_config(self, path, old, new):
"""Renames all instances of a config within a GM expectations file.
Params:
path: path to file which will be modified in place
old: old config name
new: new config name
"""
dic = gm_json.LoadFromFile(file_path=path)
expected_results = dic[gm_json.JSONKEY_EXPECTEDRESULTS]
orig_keys = expected_results.keys()
for key in orig_keys:
result = expected_results.pop(key)
(testname, config) = IMAGE_FILENAME_RE.match(key).groups()
if config == old:
config = new
key = '%s_%s.png' % (testname, config)
expected_results[key] = result
gm_json.WriteToFile(json_dict=dic, file_path=path)
def _get_file_list(self):
"""Returns the list of files we want to operate on (the complete path
to each file)."""
root = self._args.expectations_root
regex = re.compile(self._args.builder_name_pattern)
return [os.path.join(root, builder, 'expected-results.json')
for builder in os.listdir(root)
if regex.match(builder)]
def main():
parser = argparse.ArgumentParser()
parser.add_argument('old_config_name',
help=('Config name we want to replace.'))
parser.add_argument('new_config_name',
help=('Config name we want to replace the old one with.'))
parser.add_argument('builder_name_pattern',
help=('Regex pattern describing which builders we want '
'to make the substitution for; \'.*\' to perform '
'the replacement on all builders.'))
parser.add_argument('--expectations-root',
default=DEFAULT_EXPECTATIONS_ROOT,
help=('Root of the GM expectations dir; defaults to '
'%(default)s'))
args = parser.parse_args()
renamer = Renamer(args)
renamer.run()
if __name__ == '__main__':
main()
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