Add scripts to list or trace all test cases in a gtest executable.

tools/isolate/read_trace.py

Index: tools/isolate/read_trace.py
diff --git a/tools/isolate/read_trace.py b/tools/isolate/read_trace.py
new file mode 100755
index 0000000000000000000000000000000000000000..fda49238d0a4a1769d424de5f0c7d7cfa5eca880
--- /dev/null
+++ b/tools/isolate/read_trace.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Reads a trace. Mostly for testing."""
+
+import logging
+import optparse
+import os
+import sys
+
+import trace_inputs
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+ROOT_DIR = os.path.dirname(os.path.dirname(BASE_DIR))
+
+
+def read_trace(logname, root_dir, cwd_dir, product_dir):
+  # Resolve any symlink
+  root_dir = os.path.realpath(root_dir)
+  api = trace_inputs.get_api()
+  _, _, _, _, simplified = trace_inputs.load_trace(logname, root_dir, api)
+  variables = trace_inputs.generate_dict(simplified, cwd_dir, product_dir)
+  trace_inputs.pretty_print(variables, sys.stdout)
+
+
+def main():
+  """CLI frontend to validate arguments."""
+  parser = optparse.OptionParser(
+      usage='%prog <options> [gtest]')
+  parser.add_option(
+      '-v', '--verbose',
+      action='count',
+      default=0,
+      help='Use up to 3 times to increase logging level')
+  parser.add_option(
+      '-c', '--cwd',
+      default='chrome',
+      help='Signal to start the process from this relative directory. When '
+           'specified, outputs the inputs files in a way compatible for '
+           'gyp processing. Should be set to the relative path containing the '
+           'gyp file, e.g. \'chrome\' or \'net\'')
+  parser.add_option(
+      '-p', '--product-dir',
+      default='out/Release',
+      help='Directory for PRODUCT_DIR. Default: %default')
+  parser.add_option(
+      '--root-dir',
+      default=ROOT_DIR,
+      help='Root directory to base everything off. Default: %default')
+  options, args = parser.parse_args()
+
+  level = [logging.ERROR, logging.INFO, logging.DEBUG][min(2, options.verbose)]
+  logging.basicConfig(
+        level=level,
+        format='%(levelname)5s %(module)15s(%(lineno)3d):%(message)s')
+
+  if len(args) != 1:
+    parser.error('Please provide the log to read')
+  if not options.product_dir:
+    parser.error('--product-dir is required')
+  if not options.cwd:
+    parser.error('--cwd is required')
+
+  return read_trace(
+      args[0],
+      options.root_dir,
+      options.cwd,
+      options.product_dir)
+
+
+if __name__ == '__main__':
+  sys.exit(main())