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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.
#include "google/protobuf/compiler/python/helpers.h"
#include <algorithm>
#include <string>
#include <vector>
#include "y_absl/log/absl_check.h"
#include "y_absl/strings/escaping.h"
#include "y_absl/strings/match.h"
#include "y_absl/strings/str_replace.h"
#include "y_absl/strings/str_split.h"
#include "y_absl/strings/string_view.h"
#include "y_absl/strings/strip.h"
#include "google/protobuf/compiler/code_generator.h"
#include "google/protobuf/descriptor.h"
#include "google/protobuf/descriptor.pb.h"
namespace google {
namespace protobuf {
namespace compiler {
namespace python {
TProtoStringType FixEv(TProtoStringType filename) {
constexpr auto kSuffixLen = 3;
if (filename.EndsWith(".ev")) {
return filename.substr(0, filename.length() - kSuffixLen) + "_ev.proto";
}
return filename;
}
// Returns the Python module name expected for a given .proto filename.
TProtoStringType ModuleName(y_absl::string_view filename) {
TProtoStringType str(std::string{filename});
TProtoStringType basename = StripProto(FixEv(str));
y_absl::StrReplaceAll({{"-", "_"}, {"/", "."}}, &basename);
return y_absl::StrCat(basename, "_pb2");
}
TProtoStringType StrippedModuleName(y_absl::string_view filename) {
TProtoStringType module_name = ModuleName(filename);
return module_name;
}
// Keywords reserved by the Python language.
const char* const kKeywords[] = {
"False", "None", "True", "and", "as", "assert",
"async", "await", "break", "class", "continue", "def",
"del", "elif", "else", "except", "finally", "for",
"from", "global", "if", "import", "in", "is",
"lambda", "nonlocal", "not", "or", "pass", "raise",
"return", "try", "while", "with", "yield",
};
const char* const* kKeywordsEnd =
kKeywords + (sizeof(kKeywords) / sizeof(kKeywords[0]));
bool ContainsPythonKeyword(y_absl::string_view module_name) {
std::vector<y_absl::string_view> tokens = y_absl::StrSplit(module_name, '.');
for (int i = 0; i < static_cast<int>(tokens.size()); ++i) {
if (std::find(kKeywords, kKeywordsEnd, tokens[i]) != kKeywordsEnd) {
return true;
}
}
return false;
}
bool IsPythonKeyword(y_absl::string_view name) {
return (std::find(kKeywords, kKeywordsEnd, name) != kKeywordsEnd);
}
TProtoStringType ResolveKeyword(y_absl::string_view name) {
if (IsPythonKeyword(name)) {
return y_absl::StrCat("globals()['", name, "']");
}
return TProtoStringType(name);
}
TProtoStringType GetFileName(const FileDescriptor* file_des,
y_absl::string_view suffix) {
TProtoStringType module_name = ModuleName(file_des->name());
TProtoStringType filename = module_name;
y_absl::StrReplaceAll({{".", "/"}}, &filename);
y_absl::StrAppend(&filename, suffix);
return filename;
}
bool HasGenericServices(const FileDescriptor* file) {
return file->service_count() > 0 && file->options().py_generic_services();
}
TProtoStringType GeneratedCodeToBase64(const GeneratedCodeInfo& annotations) {
TProtoStringType result;
y_absl::Base64Escape(annotations.SerializeAsString(), &result);
return result;
}
template <typename DescriptorT>
TProtoStringType NamePrefixedWithNestedTypes(const DescriptorT& descriptor,
y_absl::string_view separator) {
TProtoStringType name = descriptor.name();
const Descriptor* parent = descriptor.containing_type();
if (parent != nullptr) {
TProtoStringType prefix = NamePrefixedWithNestedTypes(*parent, separator);
if (separator == "." && IsPythonKeyword(name)) {
return y_absl::StrCat("getattr(", prefix, ", '", name, "')");
} else {
return y_absl::StrCat(prefix, separator, name);
}
}
if (separator == ".") {
name = ResolveKeyword(name);
}
return name;
}
template TProtoStringType NamePrefixedWithNestedTypes<Descriptor>(
const Descriptor& descriptor, y_absl::string_view separator);
template TProtoStringType NamePrefixedWithNestedTypes<EnumDescriptor>(
const EnumDescriptor& descriptor, y_absl::string_view separator);
} // namespace python
} // namespace compiler
} // namespace protobuf
} // namespace google
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