1 /*
2 *
3 * Copyright 2015 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 // Generates Node gRPC service interface out of Protobuf IDL.
20
21 #include <memory>
22
23 #include "src/compiler/config.h"
24 #include "src/compiler/node_generator.h"
25 #include "src/compiler/node_generator_helpers.h"
26
27 using grpc_node_generator::GenerateFile;
28 using grpc_node_generator::GetJSServiceFilename;
29
30 class NodeGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
31 public:
NodeGrpcGenerator()32 NodeGrpcGenerator() {}
~NodeGrpcGenerator()33 ~NodeGrpcGenerator() {}
34
GetSupportedFeatures() const35 uint64_t GetSupportedFeatures() const override {
36 return FEATURE_PROTO3_OPTIONAL;
37 }
38
Generate(const grpc::protobuf::FileDescriptor * file,const std::string & parameter,grpc::protobuf::compiler::GeneratorContext * context,std::string * error) const39 bool Generate(const grpc::protobuf::FileDescriptor* file,
40 const std::string& parameter,
41 grpc::protobuf::compiler::GeneratorContext* context,
42 std::string* error) const override {
43 grpc_node_generator::Parameters generator_parameters;
44 generator_parameters.minimum_node_version = 4;
45
46 if (!parameter.empty()) {
47 std::vector<std::string> parameters_list =
48 grpc_generator::tokenize(parameter, ",");
49 for (auto parameter_string = parameters_list.begin();
50 parameter_string != parameters_list.end(); parameter_string++) {
51 std::vector<std::string> param =
52 grpc_generator::tokenize(*parameter_string, "=");
53 if (param[0] == "minimum_node_version") {
54 sscanf(param[1].c_str(), "%d",
55 &generator_parameters.minimum_node_version);
56 } else {
57 *error = std::string("Unknown parameter: ") + *parameter_string;
58 return false;
59 }
60 }
61 }
62
63 std::string code = GenerateFile(file, generator_parameters);
64 if (code.size() == 0) {
65 return true;
66 }
67
68 // Get output file name
69 std::string file_name = GetJSServiceFilename(file->name());
70
71 std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
72 context->Open(file_name));
73 grpc::protobuf::io::CodedOutputStream coded_out(output.get());
74 coded_out.WriteRaw(code.data(), code.size());
75 return true;
76 }
77 };
78
main(int argc,char * argv[])79 int main(int argc, char* argv[]) {
80 NodeGrpcGenerator generator;
81 return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
82 }
83