Revert "delete old things!"

gm/rename_config.py

Index: gm/rename_config.py
diff --git a/gm/rename_config.py b/gm/rename_config.py
new file mode 100755
index 0000000000000000000000000000000000000000..d1c6d568a7e2ca08201157a3f97ad8962f4e9d08
--- /dev/null
+++ b/gm/rename_config.py
@@ -0,0 +1,104 @@
+#!/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()