diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/flags/parse.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/flags/parse.cc | 823 |
1 files changed, 0 insertions, 823 deletions
diff --git a/third_party/abseil_cpp/absl/flags/parse.cc b/third_party/abseil_cpp/absl/flags/parse.cc deleted file mode 100644 index dd1a6796cabd..000000000000 --- a/third_party/abseil_cpp/absl/flags/parse.cc +++ /dev/null @@ -1,823 +0,0 @@ -// -// Copyright 2019 The Abseil 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 "absl/flags/parse.h" - -#include <stdlib.h> - -#include <algorithm> -#include <fstream> -#include <iostream> -#include <iterator> -#include <string> -#include <tuple> -#include <utility> -#include <vector> - -#ifdef _WIN32 -#include <windows.h> -#endif - -#include "absl/base/attributes.h" -#include "absl/base/config.h" -#include "absl/base/const_init.h" -#include "absl/base/thread_annotations.h" -#include "absl/flags/commandlineflag.h" -#include "absl/flags/config.h" -#include "absl/flags/flag.h" -#include "absl/flags/internal/commandlineflag.h" -#include "absl/flags/internal/flag.h" -#include "absl/flags/internal/parse.h" -#include "absl/flags/internal/private_handle_accessor.h" -#include "absl/flags/internal/program_name.h" -#include "absl/flags/internal/usage.h" -#include "absl/flags/reflection.h" -#include "absl/flags/usage.h" -#include "absl/flags/usage_config.h" -#include "absl/strings/ascii.h" -#include "absl/strings/str_cat.h" -#include "absl/strings/string_view.h" -#include "absl/strings/strip.h" -#include "absl/synchronization/mutex.h" - -// -------------------------------------------------------------------- - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace flags_internal { -namespace { - -ABSL_CONST_INIT absl::Mutex processing_checks_guard(absl::kConstInit); - -ABSL_CONST_INIT bool flagfile_needs_processing - ABSL_GUARDED_BY(processing_checks_guard) = false; -ABSL_CONST_INIT bool fromenv_needs_processing - ABSL_GUARDED_BY(processing_checks_guard) = false; -ABSL_CONST_INIT bool tryfromenv_needs_processing - ABSL_GUARDED_BY(processing_checks_guard) = false; - -ABSL_CONST_INIT absl::Mutex specified_flags_guard(absl::kConstInit); -ABSL_CONST_INIT std::vector<const CommandLineFlag*>* specified_flags - ABSL_GUARDED_BY(specified_flags_guard) = nullptr; - -struct SpecifiedFlagsCompare { - bool operator()(const CommandLineFlag* a, const CommandLineFlag* b) const { - return a->Name() < b->Name(); - } - bool operator()(const CommandLineFlag* a, absl::string_view b) const { - return a->Name() < b; - } - bool operator()(absl::string_view a, const CommandLineFlag* b) const { - return a < b->Name(); - } -}; - -} // namespace -} // namespace flags_internal -ABSL_NAMESPACE_END -} // namespace absl - -ABSL_FLAG(std::vector<std::string>, flagfile, {}, - "comma-separated list of files to load flags from") - .OnUpdate([]() { - if (absl::GetFlag(FLAGS_flagfile).empty()) return; - - absl::MutexLock l(&absl::flags_internal::processing_checks_guard); - - // Setting this flag twice before it is handled most likely an internal - // error and should be reviewed by developers. - if (absl::flags_internal::flagfile_needs_processing) { - ABSL_INTERNAL_LOG(WARNING, "flagfile set twice before it is handled"); - } - - absl::flags_internal::flagfile_needs_processing = true; - }); -ABSL_FLAG(std::vector<std::string>, fromenv, {}, - "comma-separated list of flags to set from the environment" - " [use 'export FLAGS_flag1=value']") - .OnUpdate([]() { - if (absl::GetFlag(FLAGS_fromenv).empty()) return; - - absl::MutexLock l(&absl::flags_internal::processing_checks_guard); - - // Setting this flag twice before it is handled most likely an internal - // error and should be reviewed by developers. - if (absl::flags_internal::fromenv_needs_processing) { - ABSL_INTERNAL_LOG(WARNING, "fromenv set twice before it is handled."); - } - - absl::flags_internal::fromenv_needs_processing = true; - }); -ABSL_FLAG(std::vector<std::string>, tryfromenv, {}, - "comma-separated list of flags to try to set from the environment if " - "present") - .OnUpdate([]() { - if (absl::GetFlag(FLAGS_tryfromenv).empty()) return; - - absl::MutexLock l(&absl::flags_internal::processing_checks_guard); - - // Setting this flag twice before it is handled most likely an internal - // error and should be reviewed by developers. - if (absl::flags_internal::tryfromenv_needs_processing) { - ABSL_INTERNAL_LOG(WARNING, - "tryfromenv set twice before it is handled."); - } - - absl::flags_internal::tryfromenv_needs_processing = true; - }); - -ABSL_FLAG(std::vector<std::string>, undefok, {}, - "comma-separated list of flag names that it is okay to specify " - "on the command line even if the program does not define a flag " - "with that name"); - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace flags_internal { - -namespace { - -class ArgsList { - public: - ArgsList() : next_arg_(0) {} - ArgsList(int argc, char* argv[]) : args_(argv, argv + argc), next_arg_(0) {} - explicit ArgsList(const std::vector<std::string>& args) - : args_(args), next_arg_(0) {} - - // Returns success status: true if parsing successful, false otherwise. - bool ReadFromFlagfile(const std::string& flag_file_name); - - int Size() const { return args_.size() - next_arg_; } - int FrontIndex() const { return next_arg_; } - absl::string_view Front() const { return args_[next_arg_]; } - void PopFront() { next_arg_++; } - - private: - std::vector<std::string> args_; - int next_arg_; -}; - -bool ArgsList::ReadFromFlagfile(const std::string& flag_file_name) { - std::ifstream flag_file(flag_file_name); - - if (!flag_file) { - flags_internal::ReportUsageError( - absl::StrCat("Can't open flagfile ", flag_file_name), true); - - return false; - } - - // This argument represents fake argv[0], which should be present in all arg - // lists. - args_.push_back(""); - - std::string line; - bool success = true; - - while (std::getline(flag_file, line)) { - absl::string_view stripped = absl::StripLeadingAsciiWhitespace(line); - - if (stripped.empty() || stripped[0] == '#') { - // Comment or empty line; just ignore. - continue; - } - - if (stripped[0] == '-') { - if (stripped == "--") { - flags_internal::ReportUsageError( - "Flagfile can't contain position arguments or --", true); - - success = false; - break; - } - - args_.push_back(std::string(stripped)); - continue; - } - - flags_internal::ReportUsageError( - absl::StrCat("Unexpected line in the flagfile ", flag_file_name, ": ", - line), - true); - - success = false; - } - - return success; -} - -// -------------------------------------------------------------------- - -// Reads the environment variable with name `name` and stores results in -// `value`. If variable is not present in environment returns false, otherwise -// returns true. -bool GetEnvVar(const char* var_name, std::string& var_value) { -#ifdef _WIN32 - char buf[1024]; - auto get_res = GetEnvironmentVariableA(var_name, buf, sizeof(buf)); - if (get_res >= sizeof(buf)) { - return false; - } - - if (get_res == 0) { - return false; - } - - var_value = std::string(buf, get_res); -#else - const char* val = ::getenv(var_name); - if (val == nullptr) { - return false; - } - - var_value = val; -#endif - - return true; -} - -// -------------------------------------------------------------------- - -// Returns: -// Flag name or empty if arg= -- -// Flag value after = in --flag=value (empty if --foo) -// "Is empty value" status. True if arg= --foo=, false otherwise. This is -// required to separate --foo from --foo=. -// For example: -// arg return values -// "--foo=bar" -> {"foo", "bar", false}. -// "--foo" -> {"foo", "", false}. -// "--foo=" -> {"foo", "", true}. -std::tuple<absl::string_view, absl::string_view, bool> SplitNameAndValue( - absl::string_view arg) { - // Allow -foo and --foo - absl::ConsumePrefix(&arg, "-"); - - if (arg.empty()) { - return std::make_tuple("", "", false); - } - - auto equal_sign_pos = arg.find("="); - - absl::string_view flag_name = arg.substr(0, equal_sign_pos); - - absl::string_view value; - bool is_empty_value = false; - - if (equal_sign_pos != absl::string_view::npos) { - value = arg.substr(equal_sign_pos + 1); - is_empty_value = value.empty(); - } - - return std::make_tuple(flag_name, value, is_empty_value); -} - -// -------------------------------------------------------------------- - -// Returns: -// found flag or nullptr -// is negative in case of --nofoo -std::tuple<CommandLineFlag*, bool> LocateFlag(absl::string_view flag_name) { - CommandLineFlag* flag = absl::FindCommandLineFlag(flag_name); - bool is_negative = false; - - if (!flag && absl::ConsumePrefix(&flag_name, "no")) { - flag = absl::FindCommandLineFlag(flag_name); - is_negative = true; - } - - return std::make_tuple(flag, is_negative); -} - -// -------------------------------------------------------------------- - -// Verify that default values of typed flags must be convertible to string and -// back. -void CheckDefaultValuesParsingRoundtrip() { -#ifndef NDEBUG - flags_internal::ForEachFlag([&](CommandLineFlag& flag) { - if (flag.IsRetired()) return; - -#define ABSL_FLAGS_INTERNAL_IGNORE_TYPE(T, _) \ - if (flag.IsOfType<T>()) return; - - ABSL_FLAGS_INTERNAL_SUPPORTED_TYPES(ABSL_FLAGS_INTERNAL_IGNORE_TYPE) -#undef ABSL_FLAGS_INTERNAL_IGNORE_TYPE - - flags_internal::PrivateHandleAccessor::CheckDefaultValueParsingRoundtrip( - flag); - }); -#endif -} - -// -------------------------------------------------------------------- - -// Returns success status, which is true if we successfully read all flag files, -// in which case new ArgLists are appended to the input_args in a reverse order -// of file names in the input flagfiles list. This order ensures that flags from -// the first flagfile in the input list are processed before the second flagfile -// etc. -bool ReadFlagfiles(const std::vector<std::string>& flagfiles, - std::vector<ArgsList>& input_args) { - bool success = true; - for (auto it = flagfiles.rbegin(); it != flagfiles.rend(); ++it) { - ArgsList al; - - if (al.ReadFromFlagfile(*it)) { - input_args.push_back(al); - } else { - success = false; - } - } - - return success; -} - -// Returns success status, which is true if were able to locate all environment -// variables correctly or if fail_on_absent_in_env is false. The environment -// variable names are expected to be of the form `FLAGS_<flag_name>`, where -// `flag_name` is a string from the input flag_names list. If successful we -// append a single ArgList at the end of the input_args. -bool ReadFlagsFromEnv(const std::vector<std::string>& flag_names, - std::vector<ArgsList>& input_args, - bool fail_on_absent_in_env) { - bool success = true; - std::vector<std::string> args; - - // This argument represents fake argv[0], which should be present in all arg - // lists. - args.push_back(""); - - for (const auto& flag_name : flag_names) { - // Avoid infinite recursion. - if (flag_name == "fromenv" || flag_name == "tryfromenv") { - flags_internal::ReportUsageError( - absl::StrCat("Infinite recursion on flag ", flag_name), true); - - success = false; - continue; - } - - const std::string envname = absl::StrCat("FLAGS_", flag_name); - std::string envval; - if (!GetEnvVar(envname.c_str(), envval)) { - if (fail_on_absent_in_env) { - flags_internal::ReportUsageError( - absl::StrCat(envname, " not found in environment"), true); - - success = false; - } - - continue; - } - - args.push_back(absl::StrCat("--", flag_name, "=", envval)); - } - - if (success) { - input_args.emplace_back(args); - } - - return success; -} - -// -------------------------------------------------------------------- - -// Returns success status, which is true if were able to handle all generator -// flags (flagfile, fromenv, tryfromemv) successfully. -bool HandleGeneratorFlags(std::vector<ArgsList>& input_args, - std::vector<std::string>& flagfile_value) { - bool success = true; - - absl::MutexLock l(&flags_internal::processing_checks_guard); - - // flagfile could have been set either on a command line or - // programmatically before invoking ParseCommandLine. Note that we do not - // actually process arguments specified in the flagfile, but instead - // create a secondary arguments list to be processed along with the rest - // of the comamnd line arguments. Since we always the process most recently - // created list of arguments first, this will result in flagfile argument - // being processed before any other argument in the command line. If - // FLAGS_flagfile contains more than one file name we create multiple new - // levels of arguments in a reverse order of file names. Thus we always - // process arguments from first file before arguments containing in a - // second file, etc. If flagfile contains another - // --flagfile inside of it, it will produce new level of arguments and - // processed before the rest of the flagfile. We are also collecting all - // flagfiles set on original command line. Unlike the rest of the flags, - // this flag can be set multiple times and is expected to be handled - // multiple times. We are collecting them all into a single list and set - // the value of FLAGS_flagfile to that value at the end of the parsing. - if (flags_internal::flagfile_needs_processing) { - auto flagfiles = absl::GetFlag(FLAGS_flagfile); - - if (input_args.size() == 1) { - flagfile_value.insert(flagfile_value.end(), flagfiles.begin(), - flagfiles.end()); - } - - success &= ReadFlagfiles(flagfiles, input_args); - - flags_internal::flagfile_needs_processing = false; - } - - // Similar to flagfile fromenv/tryfromemv can be set both - // programmatically and at runtime on a command line. Unlike flagfile these - // can't be recursive. - if (flags_internal::fromenv_needs_processing) { - auto flags_list = absl::GetFlag(FLAGS_fromenv); - - success &= ReadFlagsFromEnv(flags_list, input_args, true); - - flags_internal::fromenv_needs_processing = false; - } - - if (flags_internal::tryfromenv_needs_processing) { - auto flags_list = absl::GetFlag(FLAGS_tryfromenv); - - success &= ReadFlagsFromEnv(flags_list, input_args, false); - - flags_internal::tryfromenv_needs_processing = false; - } - - return success; -} - -// -------------------------------------------------------------------- - -void ResetGeneratorFlags(const std::vector<std::string>& flagfile_value) { - // Setting flagfile to the value which collates all the values set on a - // command line and programmatically. So if command line looked like - // --flagfile=f1 --flagfile=f2 the final value of the FLAGS_flagfile flag is - // going to be {"f1", "f2"} - if (!flagfile_value.empty()) { - absl::SetFlag(&FLAGS_flagfile, flagfile_value); - absl::MutexLock l(&flags_internal::processing_checks_guard); - flags_internal::flagfile_needs_processing = false; - } - - // fromenv/tryfromenv are set to <undefined> value. - if (!absl::GetFlag(FLAGS_fromenv).empty()) { - absl::SetFlag(&FLAGS_fromenv, {}); - } - if (!absl::GetFlag(FLAGS_tryfromenv).empty()) { - absl::SetFlag(&FLAGS_tryfromenv, {}); - } - - absl::MutexLock l(&flags_internal::processing_checks_guard); - flags_internal::fromenv_needs_processing = false; - flags_internal::tryfromenv_needs_processing = false; -} - -// -------------------------------------------------------------------- - -// Returns: -// success status -// deduced value -// We are also mutating curr_list in case if we need to get a hold of next -// argument in the input. -std::tuple<bool, absl::string_view> DeduceFlagValue(const CommandLineFlag& flag, - absl::string_view value, - bool is_negative, - bool is_empty_value, - ArgsList* curr_list) { - // Value is either an argument suffix after `=` in "--foo=<value>" - // or separate argument in case of "--foo" "<value>". - - // boolean flags have these forms: - // --foo - // --nofoo - // --foo=true - // --foo=false - // --nofoo=<value> is not supported - // --foo <value> is not supported - - // non boolean flags have these forms: - // --foo=<value> - // --foo <value> - // --nofoo is not supported - - if (flag.IsOfType<bool>()) { - if (value.empty()) { - if (is_empty_value) { - // "--bool_flag=" case - flags_internal::ReportUsageError( - absl::StrCat( - "Missing the value after assignment for the boolean flag '", - flag.Name(), "'"), - true); - return std::make_tuple(false, ""); - } - - // "--bool_flag" case - value = is_negative ? "0" : "1"; - } else if (is_negative) { - // "--nobool_flag=Y" case - flags_internal::ReportUsageError( - absl::StrCat("Negative form with assignment is not valid for the " - "boolean flag '", - flag.Name(), "'"), - true); - return std::make_tuple(false, ""); - } - } else if (is_negative) { - // "--noint_flag=1" case - flags_internal::ReportUsageError( - absl::StrCat("Negative form is not valid for the flag '", flag.Name(), - "'"), - true); - return std::make_tuple(false, ""); - } else if (value.empty() && (!is_empty_value)) { - if (curr_list->Size() == 1) { - // "--int_flag" case - flags_internal::ReportUsageError( - absl::StrCat("Missing the value for the flag '", flag.Name(), "'"), - true); - return std::make_tuple(false, ""); - } - - // "--int_flag" "10" case - curr_list->PopFront(); - value = curr_list->Front(); - - // Heuristic to detect the case where someone treats a string arg - // like a bool or just forgets to pass a value: - // --my_string_var --foo=bar - // We look for a flag of string type, whose value begins with a - // dash and corresponds to known flag or standalone --. - if (!value.empty() && value[0] == '-' && flag.IsOfType<std::string>()) { - auto maybe_flag_name = std::get<0>(SplitNameAndValue(value.substr(1))); - - if (maybe_flag_name.empty() || - std::get<0>(LocateFlag(maybe_flag_name)) != nullptr) { - // "--string_flag" "--known_flag" case - ABSL_INTERNAL_LOG( - WARNING, - absl::StrCat("Did you really mean to set flag '", flag.Name(), - "' to the value '", value, "'?")); - } - } - } - - return std::make_tuple(true, value); -} - -// -------------------------------------------------------------------- - -bool CanIgnoreUndefinedFlag(absl::string_view flag_name) { - auto undefok = absl::GetFlag(FLAGS_undefok); - if (std::find(undefok.begin(), undefok.end(), flag_name) != undefok.end()) { - return true; - } - - if (absl::ConsumePrefix(&flag_name, "no") && - std::find(undefok.begin(), undefok.end(), flag_name) != undefok.end()) { - return true; - } - - return false; -} - -} // namespace - -// -------------------------------------------------------------------- - -bool WasPresentOnCommandLine(absl::string_view flag_name) { - absl::MutexLock l(&specified_flags_guard); - ABSL_INTERNAL_CHECK(specified_flags != nullptr, - "ParseCommandLine is not invoked yet"); - - return std::binary_search(specified_flags->begin(), specified_flags->end(), - flag_name, SpecifiedFlagsCompare{}); -} - -// -------------------------------------------------------------------- - -std::vector<char*> ParseCommandLineImpl(int argc, char* argv[], - ArgvListAction arg_list_act, - UsageFlagsAction usage_flag_act, - OnUndefinedFlag on_undef_flag) { - ABSL_INTERNAL_CHECK(argc > 0, "Missing argv[0]"); - - // Once parsing has started we will not have more flag registrations. - // If we did, they would be missing during parsing, which is a problem on - // itself. - flags_internal::FinalizeRegistry(); - - // This routine does not return anything since we abort on failure. - CheckDefaultValuesParsingRoundtrip(); - - std::vector<std::string> flagfile_value; - - std::vector<ArgsList> input_args; - input_args.push_back(ArgsList(argc, argv)); - - std::vector<char*> output_args; - std::vector<char*> positional_args; - output_args.reserve(argc); - - // This is the list of undefined flags. The element of the list is the pair - // consisting of boolean indicating if flag came from command line (vs from - // some flag file we've read) and flag name. - // TODO(rogeeff): Eliminate the first element in the pair after cleanup. - std::vector<std::pair<bool, std::string>> undefined_flag_names; - - // Set program invocation name if it is not set before. - if (ProgramInvocationName() == "UNKNOWN") { - flags_internal::SetProgramInvocationName(argv[0]); - } - output_args.push_back(argv[0]); - - absl::MutexLock l(&specified_flags_guard); - if (specified_flags == nullptr) { - specified_flags = new std::vector<const CommandLineFlag*>; - } else { - specified_flags->clear(); - } - - // Iterate through the list of the input arguments. First level are arguments - // originated from argc/argv. Following levels are arguments originated from - // recursive parsing of flagfile(s). - bool success = true; - while (!input_args.empty()) { - // 10. First we process the built-in generator flags. - success &= HandleGeneratorFlags(input_args, flagfile_value); - - // 30. Select top-most (most recent) arguments list. If it is empty drop it - // and re-try. - ArgsList& curr_list = input_args.back(); - - curr_list.PopFront(); - - if (curr_list.Size() == 0) { - input_args.pop_back(); - continue; - } - - // 40. Pick up the front remaining argument in the current list. If current - // stack of argument lists contains only one element - we are processing an - // argument from the original argv. - absl::string_view arg(curr_list.Front()); - bool arg_from_argv = input_args.size() == 1; - - // 50. If argument does not start with - or is just "-" - this is - // positional argument. - if (!absl::ConsumePrefix(&arg, "-") || arg.empty()) { - ABSL_INTERNAL_CHECK(arg_from_argv, - "Flagfile cannot contain positional argument"); - - positional_args.push_back(argv[curr_list.FrontIndex()]); - continue; - } - - if (arg_from_argv && (arg_list_act == ArgvListAction::kKeepParsedArgs)) { - output_args.push_back(argv[curr_list.FrontIndex()]); - } - - // 60. Split the current argument on '=' to figure out the argument - // name and value. If flag name is empty it means we've got "--". value - // can be empty either if there were no '=' in argument string at all or - // an argument looked like "--foo=". In a latter case is_empty_value is - // true. - absl::string_view flag_name; - absl::string_view value; - bool is_empty_value = false; - - std::tie(flag_name, value, is_empty_value) = SplitNameAndValue(arg); - - // 70. "--" alone means what it does for GNU: stop flags parsing. We do - // not support positional arguments in flagfiles, so we just drop them. - if (flag_name.empty()) { - ABSL_INTERNAL_CHECK(arg_from_argv, - "Flagfile cannot contain positional argument"); - - curr_list.PopFront(); - break; - } - - // 80. Locate the flag based on flag name. Handle both --foo and --nofoo - CommandLineFlag* flag = nullptr; - bool is_negative = false; - std::tie(flag, is_negative) = LocateFlag(flag_name); - - if (flag == nullptr) { - // Usage flags are not modeled as Abseil flags. Locate them separately. - if (flags_internal::DeduceUsageFlags(flag_name, value)) { - continue; - } - - if (on_undef_flag != OnUndefinedFlag::kIgnoreUndefined) { - undefined_flag_names.emplace_back(arg_from_argv, - std::string(flag_name)); - } - continue; - } - - // 90. Deduce flag's value (from this or next argument) - auto curr_index = curr_list.FrontIndex(); - bool value_success = true; - std::tie(value_success, value) = - DeduceFlagValue(*flag, value, is_negative, is_empty_value, &curr_list); - success &= value_success; - - // If above call consumed an argument, it was a standalone value - if (arg_from_argv && (arg_list_act == ArgvListAction::kKeepParsedArgs) && - (curr_index != curr_list.FrontIndex())) { - output_args.push_back(argv[curr_list.FrontIndex()]); - } - - // 100. Set the located flag to a new new value, unless it is retired. - // Setting retired flag fails, but we ignoring it here while also reporting - // access to retired flag. - std::string error; - if (!flags_internal::PrivateHandleAccessor::ParseFrom( - *flag, value, SET_FLAGS_VALUE, kCommandLine, error)) { - if (flag->IsRetired()) continue; - - flags_internal::ReportUsageError(error, true); - success = false; - } else { - specified_flags->push_back(flag); - } - } - - for (const auto& flag_name : undefined_flag_names) { - if (CanIgnoreUndefinedFlag(flag_name.second)) continue; - - flags_internal::ReportUsageError( - absl::StrCat("Unknown command line flag '", flag_name.second, "'"), - true); - - success = false; - } - -#if ABSL_FLAGS_STRIP_NAMES - if (!success) { - flags_internal::ReportUsageError( - "NOTE: command line flags are disabled in this build", true); - } -#endif - - if (!success) { - flags_internal::HandleUsageFlags(std::cout, - ProgramUsageMessage()); - std::exit(1); - } - - if (usage_flag_act == UsageFlagsAction::kHandleUsage) { - int exit_code = flags_internal::HandleUsageFlags( - std::cout, ProgramUsageMessage()); - - if (exit_code != -1) { - std::exit(exit_code); - } - } - - ResetGeneratorFlags(flagfile_value); - - // Reinstate positional args which were intermixed with flags in the arguments - // list. - for (auto arg : positional_args) { - output_args.push_back(arg); - } - - // All the remaining arguments are positional. - if (!input_args.empty()) { - for (int arg_index = input_args.back().FrontIndex(); arg_index < argc; - ++arg_index) { - output_args.push_back(argv[arg_index]); - } - } - - // Trim and sort the vector. - specified_flags->shrink_to_fit(); - std::sort(specified_flags->begin(), specified_flags->end(), - SpecifiedFlagsCompare{}); - return output_args; -} - -} // namespace flags_internal - -// -------------------------------------------------------------------- - -std::vector<char*> ParseCommandLine(int argc, char* argv[]) { - return flags_internal::ParseCommandLineImpl( - argc, argv, flags_internal::ArgvListAction::kRemoveParsedArgs, - flags_internal::UsageFlagsAction::kHandleUsage, - flags_internal::OnUndefinedFlag::kAbortIfUndefined); -} - -ABSL_NAMESPACE_END -} // namespace absl |