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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Author: kenton@google.com (Kenton Varda)
#include <google/protobuf/compiler/plugin.h>
#include <iostream>
#include <set>
#ifdef _WIN32
#include <io.h>
#include <fcntl.h>
#ifndef STDIN_FILENO
#define STDIN_FILENO 0
#endif
#ifndef STDOUT_FILENO
#define STDOUT_FILENO 1
#endif
#else
#include <unistd.h>
#endif
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/compiler/plugin.pb.h>
#include <google/protobuf/compiler/code_generator.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
namespace google {
namespace protobuf {
namespace compiler {
class GeneratorResponseContext : public GeneratorContext {
public:
GeneratorResponseContext(CodeGeneratorResponse* response,
const vector<const FileDescriptor*>& parsed_files)
: response_(response),
parsed_files_(parsed_files) {}
virtual ~GeneratorResponseContext() {}
// implements GeneratorContext --------------------------------------
virtual io::ZeroCopyOutputStream* Open(const string& filename) {
CodeGeneratorResponse::File* file = response_->add_file();
file->set_name(filename);
return new io::StringOutputStream(file->mutable_content());
}
virtual io::ZeroCopyOutputStream* OpenForInsert(
const string& filename, const string& insertion_point) {
CodeGeneratorResponse::File* file = response_->add_file();
file->set_name(filename);
file->set_insertion_point(insertion_point);
return new io::StringOutputStream(file->mutable_content());
}
void ListParsedFiles(vector<const FileDescriptor*>* output) {
*output = parsed_files_;
}
private:
CodeGeneratorResponse* response_;
const vector<const FileDescriptor*>& parsed_files_;
};
int PluginMain(int argc, char* argv[], const CodeGenerator* generator) {
if (argc > 1) {
cerr << argv[0] << ": Unknown option: " << argv[1] << endl;
return 1;
}
#ifdef _WIN32
_setmode(STDIN_FILENO, _O_BINARY);
_setmode(STDOUT_FILENO, _O_BINARY);
#endif
CodeGeneratorRequest request;
if (!request.ParseFromFileDescriptor(STDIN_FILENO)) {
cerr << argv[0] << ": protoc sent unparseable request to plugin." << endl;
return 1;
}
DescriptorPool pool;
for (int i = 0; i < request.proto_file_size(); i++) {
const FileDescriptor* file = pool.BuildFile(request.proto_file(i));
if (file == NULL) {
// BuildFile() already wrote an error message.
return 1;
}
}
vector<const FileDescriptor*> parsed_files;
for (int i = 0; i < request.file_to_generate_size(); i++) {
parsed_files.push_back(pool.FindFileByName(request.file_to_generate(i)));
if (parsed_files.back() == NULL) {
cerr << argv[0] << ": protoc asked plugin to generate a file but "
"did not provide a descriptor for the file: "
<< request.file_to_generate(i) << endl;
return 1;
}
}
CodeGeneratorResponse response;
GeneratorResponseContext context(&response, parsed_files);
for (int i = 0; i < parsed_files.size(); i++) {
const FileDescriptor* file = parsed_files[i];
string error;
bool succeeded = generator->Generate(
file, request.parameter(), &context, &error);
if (!succeeded && error.empty()) {
error = "Code generator returned false but provided no error "
"description.";
}
if (!error.empty()) {
response.set_error(file->name() + ": " + error);
break;
}
}
if (!response.SerializeToFileDescriptor(STDOUT_FILENO)) {
cerr << argv[0] << ": Error writing to stdout." << endl;
return 1;
}
return 0;
}
} // namespace compiler
} // namespace protobuf
} // namespace google
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