Updates to the ruby generator for protobuf 3.6.0 changes

test for verifying the ruby_package option
added WeWork to the AUTHORS file

AUTHORS

@@ -1 +1,2 @@
 Google Inc.
+WeWork Companies Inc.

src/compiler/ruby_generator.cc

@@ -160,12 +160,20 @@ grpc::string GetServices(const FileDescriptor* file) {
       return output;
     }
 
+    std::string package_name;
+
+    if (file->options().has_ruby_package()) {
+      package_name = file->options().ruby_package();
+    } else {
+      package_name = file->package();
+    }
+
     // Write out a file header.
     std::map<grpc::string, grpc::string> header_comment_vars = ListToDict({
         "file.name",
         file->name(),
         "file.package",
-        file->package(),
+        package_name,
     });
     out.Print("# Generated by the protocol buffer compiler.  DO NOT EDIT!\n");
     out.Print(header_comment_vars,
@@ -190,7 +198,7 @@ grpc::string GetServices(const FileDescriptor* file) {
 
     // Write out services within the modules
     out.Print("\n");
-    std::vector<grpc::string> modules = Split(file->package(), '.');
+    std::vector<grpc::string> modules = Split(package_name, '.');
     for (size_t i = 0; i < modules.size(); ++i) {
       std::map<grpc::string, grpc::string> module_vars = ListToDict({
           "module.name",

src/proto/grpc/testing/package_options.proto

@@ -0,0 +1,28 @@
+// Copyright 2018 gRPC authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package grpc.testing;
+
+// For sanity checking package definitions
+option ruby_package = "Grpc.Testing.Package.Options";
+
+message TestRequest { }
+
+message TestResponse { }
+
+service TestService {
+  rpc GetTest(TestRequest) returns (TestResponse) { }
+}

src/ruby/spec/pb/codegen/package_option_spec.rb

@@ -0,0 +1,53 @@
+# Copyright 2018 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'spec_helper'
+require 'open3'
+require 'tmpdir'
+
+describe 'Code Generation Options' do
+  it 'should generate and respect package options' do
+    fail 'CONFIG env variable unexpectedly unset' unless ENV['CONFIG']
+    bins_sub_dir = ENV['CONFIG']
+
+    src_dir = File.join(File.dirname(__FILE__), '..', '..', '..', '..')
+    pb_dir = File.join(src_dir, 'proto')
+    bins_dir = File.join(src_dir, '..', 'bins', bins_sub_dir)
+
+    plugin = File.join(bins_dir, 'grpc_ruby_plugin')
+    protoc = File.join(bins_dir, 'protobuf', 'protoc')
+
+    # Generate the service from the proto
+    Dir.mktmpdir(nil, File.dirname(__FILE__)) do |tmp_dir|
+      gen_file = system(protoc,
+                        '-I.',
+                        'grpc/testing/package_options.proto',
+                        "--grpc_out=#{tmp_dir}", # generate the service
+                        "--ruby_out=#{tmp_dir}", # generate the definitions
+                        "--plugin=protoc-gen-grpc=#{plugin}",
+                        chdir: pb_dir,
+                        out: File::NULL)
+
+      expect(gen_file).to be_truthy
+      begin
+        $LOAD_PATH.push(tmp_dir)
+        expect { Grpc::Testing::Package::Options::TestService::Service }.to raise_error(NameError)
+        expect(require('grpc/testing/package_options_services_pb')).to be_truthy
+        expect { Grpc::Testing::Package::Options::TestService::Service }.to_not raise_error
+      ensure
+        $LOAD_PATH.delete(tmp_dir)
+      end
+    end
+  end
+end