Re-Re-land: Add download_file_types.proto with ascii->binary conversion, as a resource.

chrome/browser/resources/safe_browsing/gen_file_type_proto.py

+#!/usr/bin/python
+# Copyright 2016 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.
+
+"""
+ Convert the ASCII download_file_types.asciipb proto into a binary resource.
+"""
+
+import optparse
+import subprocess
+import sys
+
+
+def ConvertProto(opts):
+  # Find the proto code
+  for path in opts.path:
+    # Put the path to our proto libraries in front, so that we don't use system
+    # protobuf.
+    sys.path.insert(1, path)
+
+
+  import download_file_types_pb2 as config_pb2
+  import google.protobuf.text_format as text_format
+
+  # Read the ASCII
+  ifile = open(opts.infile, 'r')
+  ascii_pb_str = ifile.read()
+  ifile.close()
+
+  # Parse it into a structure PB
+  pb = config_pb2.DownloadFileTypeConfig()
+  text_format.Merge(ascii_pb_str, pb)
+
+  # Serialize it
+  binary_pb_str = pb.SerializeToString()
+
+  # Write it to disk
+  open(opts.outfile, 'w').write(binary_pb_str)
+
+
+def main():
+  parser = optparse.OptionParser()
+  # TODO(nparker): Remove this once the bug is fixed.
+  parser.add_option('-w', '--wrap', action="store_true", default=False,
+                     help='Wrap this script in another python '
+                     'execution to disable site-packages.  This is a '
+                     'fix for http://crbug.com/605592')
+  parser.add_option('-i', '--infile',
+                    help='The ASCII DownloadFileType-proto file to read.')
+  parser.add_option('-o', '--outfile',
+                    help='The binary file to write.')
+  parser.add_option('-p', '--path', action="append",
+                    help='Repeat this as needed.  Directory(s) containing ' +
+                    'the download_file_types_pb2.py and ' +
+                    'google.protobuf.text_format modules')
+  (opts, args) = parser.parse_args()
+  if opts.infile is None or opts.outfile is None:
+    parser.print_help()
+    return 1
+
+  if opts.wrap:
+    # Run this script again with different args to the interpreter.

[xyzzyz, 2016/04/25 23:02:21]

Explain in comment why we do this.

+    command = [sys.executable, '-S', '-s', sys.argv[0]]
+    command += ['-i', opts.infile]
+    command += ['-o', opts.outfile]
+    for path in opts.path:
+      command += ['-p', path]
+    sys.exit(subprocess.call(command))
+
+  try:
+    ConvertProto(opts)
+  except Exception as e:
+    print "ERROR: %s failed to parse ASCII proto\n%s: %s\n" % (
+        sys.argv, opts.infile, str(e))
+    return 1
+
+if __name__ == '__main__':
+  sys.exit(main())