Sync: Generalize entity injection in Android tests

sync/protocol/prepare_protos_for_java_tests.py

Index: sync/protocol/prepare_protos_for_java_tests.py
diff --git a/sync/protocol/prepare_protos_for_java_tests.py b/sync/protocol/prepare_protos_for_java_tests.py
new file mode 100755
index 0000000000000000000000000000000000000000..4f97b35eba8f73001aeba6e16ea749aa994042c8
--- /dev/null
+++ b/sync/protocol/prepare_protos_for_java_tests.py
@@ -0,0 +1,39 @@
+#!/usr/bin/python

[nyquist, 2015/03/24 00:25:35]

I think the new hotness is to use
#!/usr/bin/env python

[pval...(no longer on Chromium), 2015/03/26 21:17:57]

Done.

+# Copyright 2015 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.
+
+import optparse
+import os
+import shutil
+import sys
+
+def main():

[nyquist, 2015/03/24 00:25:36]

What does this script do? Could you add a python-specific docstring at the top
of the file?

[pval...(no longer on Chromium), 2015/03/26 21:17:57]

Done.

+  parser = optparse.OptionParser(
+      usage='Usage: %prog [options...] original_proto_files')
+  parser.add_option('-o', '--output_dir', dest='output_dir',
+                    help='Where to put the modified proto files')
+
+  options, args = parser.parse_args()
+  if not options.output_dir:
+    print 'output_dir not specified.'
+    return 1
+
+  # Copy the original proto files to the new location.
+  for original_proto_file in args:
+    shutil.copy(original_proto_file, options.output_dir)
+
+  for new_proto_file_name in os.listdir(options.output_dir):
+    new_proto_file_path = os.path.join(options.output_dir, new_proto_file_name)
+    # The retain_unknown_fields option is removed because it is not supported by
+    # the protobuf nano library (used in Chromium Java).
+    # Java-specific options are set to ensure that the protos are properly
+    # organized and compiled.
+    os.system("sed -i 's/option retain_unknown_fields = true;/"

[pval...(no longer on Chromium), 2015/03/13 00:32:45]

should I match whitespace here? for example, what if the proto files are like
this:

option        retain_unknown_fields    =  true;

[nyquist, 2015/03/24 00:25:36]

I'd use built in tools in python for regexp here instead of shelling out. It
would require reading the file, but I find that more correct I believe.

[pval...(no longer on Chromium), 2015/03/26 21:17:57]

Done.

+              "option java_multiple_files = true; "
+              "option java_package = \"org.chromium.sync.protocol\";"
+              "/g' %s" % new_proto_file_path)
+
+
+if __name__ == '__main__':
+  sys.exit(main())