| // |
| // Copyright 2022 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/log/internal/flags.h" |
| |
| #include <stddef.h> |
| |
| #include <algorithm> |
| #include <cstdlib> |
| #include <string> |
| |
| #include "absl/base/attributes.h" |
| #include "absl/base/config.h" |
| #include "absl/base/log_severity.h" |
| #include "absl/flags/flag.h" |
| #include "absl/flags/marshalling.h" |
| #include "absl/log/globals.h" |
| #include "absl/log/internal/config.h" |
| #include "absl/strings/numbers.h" |
| #include "absl/strings/string_view.h" |
| |
| namespace absl { |
| ABSL_NAMESPACE_BEGIN |
| namespace log_internal { |
| namespace { |
| |
| void SyncLoggingFlags() { |
| absl::SetFlag(&FLAGS_minloglevel, static_cast<int>(absl::MinLogLevel())); |
| absl::SetFlag(&FLAGS_log_prefix, absl::ShouldPrependLogPrefix()); |
| } |
| |
| bool RegisterSyncLoggingFlags() { |
| log_internal::SetLoggingGlobalsListener(&SyncLoggingFlags); |
| return true; |
| } |
| |
| ABSL_ATTRIBUTE_UNUSED const bool unused = RegisterSyncLoggingFlags(); |
| |
| template <typename T> |
| T GetFromEnv(const char* varname, T dflt) { |
| const char* val = ::getenv(varname); |
| if (val != nullptr) { |
| std::string err; |
| ABSL_INTERNAL_CHECK(absl::ParseFlag(val, &dflt, &err), err.c_str()); |
| } |
| return dflt; |
| } |
| |
| constexpr absl::LogSeverityAtLeast StderrThresholdDefault() { |
| return absl::LogSeverityAtLeast::kError; |
| } |
| |
| } // namespace |
| } // namespace log_internal |
| ABSL_NAMESPACE_END |
| } // namespace absl |
| |
| ABSL_FLAG(int, stderrthreshold, |
| static_cast<int>(absl::log_internal::StderrThresholdDefault()), |
| "Log messages at or above this threshold level are copied to stderr.") |
| .OnUpdate([] { |
| absl::log_internal::RawSetStderrThreshold( |
| static_cast<absl::LogSeverityAtLeast>( |
| absl::GetFlag(FLAGS_stderrthreshold))); |
| }); |
| |
| ABSL_FLAG(int, minloglevel, static_cast<int>(absl::LogSeverityAtLeast::kInfo), |
| "Messages logged at a lower level than this don't actually " |
| "get logged anywhere") |
| .OnUpdate([] { |
| absl::log_internal::RawSetMinLogLevel( |
| static_cast<absl::LogSeverityAtLeast>( |
| absl::GetFlag(FLAGS_minloglevel))); |
| }); |
| |
| ABSL_FLAG(std::string, log_backtrace_at, "", |
| "Emit a backtrace when logging at file:linenum.") |
| .OnUpdate([] { |
| const std::string log_backtrace_at = |
| absl::GetFlag(FLAGS_log_backtrace_at); |
| if (log_backtrace_at.empty()) return; |
| |
| const size_t last_colon = log_backtrace_at.rfind(':'); |
| if (last_colon == log_backtrace_at.npos) return; |
| |
| const absl::string_view file = |
| absl::string_view(log_backtrace_at).substr(0, last_colon); |
| int line; |
| if (absl::SimpleAtoi( |
| absl::string_view(log_backtrace_at).substr(last_colon + 1), |
| &line)) { |
| absl::SetLogBacktraceLocation(file, line); |
| } |
| }); |
| |
| ABSL_FLAG(bool, log_prefix, true, |
| "Prepend the log prefix to the start of each log line") |
| .OnUpdate([] { |
| absl::log_internal::RawEnableLogPrefix(absl::GetFlag(FLAGS_log_prefix)); |
| }); |