1 files changed, 85 insertions, 0 deletions
diff --git a/build/protoc_java.py b/build/protoc_java.py
new file mode 100755
index 0000000000..2addb8210f
--- /dev/null
+++ b/build/protoc_java.py
@@ -0,0 +1,85 @@
+#!/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.
+
+"""Generate java source files from protobuf files.
+
+This is a helper file for the genproto_java action in protoc_java.gypi.
+
+It performs the following steps:
+1. Deletes all old sources (ensures deleted classes are not part of new jars).
+2. Creates source directory.
+3. Generates Java files using protoc (output into either --java-out-dir or
+   --srcjar).
+4. Creates a new stamp file.
+"""
+
+import os
+import optparse
+import shutil
+import subprocess
+import sys
+
+sys.path.append(os.path.join(os.path.dirname(__file__), "android", "gyp"))
+from util import build_utils
+
+def main(argv):
+  parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
+  parser.add_option("--protoc", help="Path to protoc binary.")
+  parser.add_option("--proto-path", help="Path to proto directory.")
+  parser.add_option("--java-out-dir",
+      help="Path to output directory for java files.")
+  parser.add_option("--srcjar", help="Path to output srcjar.")
+  parser.add_option("--stamp", help="File to touch on success.")
+  parser.add_option("--nano",
+      help="Use to generate nano protos.", action='store_true')
+  options, args = parser.parse_args(argv)
+
+  build_utils.CheckOptions(options, parser, ['protoc', 'proto_path'])
+  if not options.java_out_dir and not options.srcjar:
+    print 'One of --java-out-dir or --srcjar must be specified.'
+    return 1
+
+  with build_utils.TempDir() as temp_dir:
+    if options.nano:
+      # Specify arguments to the generator.
+      generator_args = ['optional_field_style=reftypes',
+                        'store_unknown_fields=true']
+      out_arg = '--javanano_out=' + ','.join(generator_args) + ':' + temp_dir
+    else:
+      out_arg = '--java_out=' + temp_dir
+
+      # Check if all proto files (which are listed in the args) are opting to
+      # use the lite runtime, otherwise we'd have to include the much heavier
+      # regular proto runtime in Chrome.
+      # TODO(jkrcal): Replace this check by '--java_lite_out=' for the out_arg
+      # above once this works on the master branch of the protobuf library,
+      # expected in version 4.0 (see https://crbug.com/800281).
+      for proto_file in args:
+        if not 'LITE_RUNTIME' in open(proto_file).read():
+          raise Exception(
+              'Chrome only supports lite protos. Please add "optimize_for = '
+              'LITE_RUNTIME" to your proto file to enable the lite runtime.')
+    # Generate Java files using protoc.
+    build_utils.CheckOutput(
+        [options.protoc, '--proto_path', options.proto_path, out_arg]
+        + args)
+
+    if options.java_out_dir:
+      build_utils.DeleteDirectory(options.java_out_dir)
+      shutil.copytree(temp_dir, options.java_out_dir)
+    else:
+      build_utils.ZipDir(options.srcjar, temp_dir)
+
+  if options.depfile:
+    assert options.srcjar
+    deps = args + [options.protoc]
+    build_utils.WriteDepfile(options.depfile, options.srcjar, deps)
+
+  if options.stamp:
+    build_utils.Touch(options.stamp)
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))