Revert "Revert "delete old things!""

gm/rename_config.py

-#!/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()