121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
//
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// Copyright 2022 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/log/internal/flags.h"
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#include <stddef.h>
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#include <algorithm>
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#include <cstdlib>
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#include <string>
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#include "absl/base/attributes.h"
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#include "absl/base/config.h"
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#include "absl/base/log_severity.h"
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#include "absl/flags/flag.h"
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#include "absl/flags/marshalling.h"
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#include "absl/log/globals.h"
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#include "absl/log/internal/config.h"
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#include "absl/strings/numbers.h"
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#include "absl/strings/string_view.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace log_internal {
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namespace {
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void SyncLoggingFlags() {
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absl::SetFlag(&FLAGS_minloglevel, static_cast<int>(absl::MinLogLevel()));
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absl::SetFlag(&FLAGS_log_prefix, absl::ShouldPrependLogPrefix());
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}
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bool RegisterSyncLoggingFlags() {
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log_internal::SetLoggingGlobalsListener(&SyncLoggingFlags);
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return true;
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}
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ABSL_ATTRIBUTE_UNUSED const bool unused = RegisterSyncLoggingFlags();
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template <typename T>
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T GetFromEnv(const char* varname, T dflt) {
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const char* val = ::getenv(varname);
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if (val != nullptr) {
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std::string err;
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ABSL_INTERNAL_CHECK(absl::ParseFlag(val, &dflt, &err), err.c_str());
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}
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return dflt;
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}
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constexpr absl::LogSeverityAtLeast StderrThresholdDefault() {
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return absl::LogSeverityAtLeast::kError;
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}
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} // namespace
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} // namespace log_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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ABSL_FLAG(int, stderrthreshold,
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static_cast<int>(absl::log_internal::StderrThresholdDefault()),
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"Log messages at or above this threshold level are copied to stderr.")
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.OnUpdate([] {
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absl::log_internal::RawSetStderrThreshold(
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static_cast<absl::LogSeverityAtLeast>(
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absl::GetFlag(FLAGS_stderrthreshold)));
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});
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ABSL_FLAG(int, minloglevel, static_cast<int>(absl::LogSeverityAtLeast::kInfo),
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"Messages logged at a lower level than this don't actually "
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"get logged anywhere")
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.OnUpdate([] {
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absl::log_internal::RawSetMinLogLevel(
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static_cast<absl::LogSeverityAtLeast>(
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absl::GetFlag(FLAGS_minloglevel)));
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});
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ABSL_FLAG(std::string, log_backtrace_at, "",
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"Emit a backtrace when logging at file:linenum.")
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.OnUpdate([] {
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const std::string log_backtrace_at =
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absl::GetFlag(FLAGS_log_backtrace_at);
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if (log_backtrace_at.empty()) {
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absl::ClearLogBacktraceLocation();
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return;
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}
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const size_t last_colon = log_backtrace_at.rfind(':');
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if (last_colon == log_backtrace_at.npos) {
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absl::ClearLogBacktraceLocation();
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return;
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}
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const absl::string_view file =
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absl::string_view(log_backtrace_at).substr(0, last_colon);
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int line;
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if (!absl::SimpleAtoi(
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absl::string_view(log_backtrace_at).substr(last_colon + 1),
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&line)) {
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absl::ClearLogBacktraceLocation();
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return;
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}
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absl::SetLogBacktraceLocation(file, line);
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});
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ABSL_FLAG(bool, log_prefix, true,
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"Prepend the log prefix to the start of each log line")
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.OnUpdate([] {
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absl::log_internal::RawEnableLogPrefix(absl::GetFlag(FLAGS_log_prefix));
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});
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