| // Copyright 2022 The Centipede 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 |
| // |
| // https://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. |
| |
| #include "./centipede/config_util.h" |
| |
| #include "absl/flags/reflection.h" |
| #include "absl/strings/match.h" |
| #include "absl/strings/str_replace.h" |
| #include "absl/strings/substitute.h" |
| |
| namespace centipede::config { |
| |
| FlagInfosPerSource GetFlagsPerSource( |
| std::string_view source_prefix, |
| const std::set<std::string_view>& exclude_flags) { |
| FlagInfosPerSource flags_per_source; |
| for (const auto& [name, flag] : absl::GetAllFlags()) { |
| if (absl::StartsWith(flag->Filename(), source_prefix) && |
| exclude_flags.find(name) == exclude_flags.cend()) { |
| flags_per_source[flag->Filename()].emplace(FlagInfo{ |
| name, flag->CurrentValue(), flag->DefaultValue(), flag->Help()}); |
| } |
| } |
| return flags_per_source; |
| } |
| |
| std::string FormatFlagfileString(const FlagInfosPerSource& flags, |
| DefaultedFlags defaulted, |
| FlagComments comments) { |
| std::vector<std::string> lines; |
| lines.reserve(flags.size()); // this many files |
| |
| if (defaulted == DefaultedFlags::kIncluded) { |
| lines.emplace_back("# NOTE: Explicit and defaulted flags are included"); |
| } else if (defaulted == DefaultedFlags::kExcluded) { |
| lines.emplace_back("# NOTE: Defaulted flags are excluded"); |
| } else if (defaulted == DefaultedFlags::kCommentedOut) { |
| lines.emplace_back("# NOTE: Defaulted flags are commented out"); |
| } |
| lines.emplace_back(); |
| |
| for (const auto& [filename, flag_infos] : flags) { |
| lines.emplace_back(absl::Substitute("# Flags from $0:", filename)); |
| for (const auto& [name, value, default_value, help] : flag_infos) { |
| if (defaulted == DefaultedFlags::kExcluded && value == default_value) { |
| continue; |
| } |
| if (comments == FlagComments::kHelpAndDefault) { |
| const std::string prepped_help = |
| absl::StrReplaceAll(help, {{"\n", " "}}); |
| lines.emplace_back(absl::Substitute(" # $0", prepped_help)); |
| } |
| if (comments == FlagComments::kDefault || |
| comments == FlagComments::kHelpAndDefault) { |
| lines.emplace_back( |
| absl::Substitute(" # default: '$0'", default_value)); |
| } |
| if (defaulted == DefaultedFlags::kCommentedOut && |
| value == default_value) { |
| lines.emplace_back(absl::Substitute(" # --$0=$1", name, value)); |
| } else { |
| lines.emplace_back(absl::Substitute(" --$0=$1", name, value)); |
| } |
| if (comments == FlagComments::kDefault || |
| comments == FlagComments::kHelpAndDefault) { |
| lines.emplace_back(); |
| } |
| } |
| if (!lines.back().empty()) lines.emplace_back(); |
| } |
| |
| return absl::StrJoin(lines, "\n"); |
| } |
| |
| } // namespace centipede::config |