| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file or at |
| // https://developers.google.com/open-source/licenses/bsd |
| |
| #include "google/protobuf/compiler/python/helpers.h" |
| |
| #include <algorithm> |
| #include <string> |
| #include <vector> |
| |
| #include "absl/log/absl_check.h" |
| #include "absl/strings/escaping.h" |
| #include "absl/strings/match.h" |
| #include "absl/strings/str_replace.h" |
| #include "absl/strings/str_split.h" |
| #include "absl/strings/string_view.h" |
| #include "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 { |
| |
| // Returns the Python module name expected for a given .proto filename. |
| std::string ModuleName(absl::string_view filename) { |
| std::string basename = StripProto(filename); |
| absl::StrReplaceAll({{"-", "_"}, {"/", "."}}, &basename); |
| return absl::StrCat(basename, "_pb2"); |
| } |
| |
| std::string StrippedModuleName(absl::string_view filename) { |
| std::string 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(absl::string_view module_name) { |
| std::vector<absl::string_view> tokens = 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(absl::string_view name) { |
| return (std::find(kKeywords, kKeywordsEnd, name) != kKeywordsEnd); |
| } |
| |
| std::string ResolveKeyword(absl::string_view name) { |
| if (IsPythonKeyword(name)) { |
| return absl::StrCat("globals()['", name, "']"); |
| } |
| return std::string(name); |
| } |
| |
| std::string GetFileName(const FileDescriptor* file_des, |
| absl::string_view suffix) { |
| std::string module_name = ModuleName(file_des->name()); |
| std::string filename = module_name; |
| absl::StrReplaceAll({{".", "/"}}, &filename); |
| absl::StrAppend(&filename, suffix); |
| return filename; |
| } |
| |
| bool HasGenericServices(const FileDescriptor* file) { |
| return file->service_count() > 0 && file->options().py_generic_services(); |
| } |
| |
| std::string GeneratedCodeToBase64(const GeneratedCodeInfo& annotations) { |
| std::string result; |
| absl::Base64Escape(annotations.SerializeAsString(), &result); |
| return result; |
| } |
| |
| template <typename DescriptorT> |
| std::string NamePrefixedWithNestedTypes(const DescriptorT& descriptor, |
| absl::string_view separator) { |
| std::string name = descriptor.name(); |
| const Descriptor* parent = descriptor.containing_type(); |
| if (parent != nullptr) { |
| std::string prefix = NamePrefixedWithNestedTypes(*parent, separator); |
| if (separator == "." && IsPythonKeyword(name)) { |
| return absl::StrCat("getattr(", prefix, ", '", name, "')"); |
| } else { |
| return absl::StrCat(prefix, separator, name); |
| } |
| } |
| if (separator == ".") { |
| name = ResolveKeyword(name); |
| } |
| return name; |
| } |
| |
| template std::string NamePrefixedWithNestedTypes<Descriptor>( |
| const Descriptor& descriptor, absl::string_view separator); |
| template std::string NamePrefixedWithNestedTypes<EnumDescriptor>( |
| const EnumDescriptor& descriptor, absl::string_view separator); |
| |
| } // namespace python |
| } // namespace compiler |
| } // namespace protobuf |
| } // namespace google |