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//
// 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/log/internal/vlog_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()) {
absl::ClearLogBacktraceLocation();
return;
}
const size_t last_colon = log_backtrace_at.rfind(':');
if (last_colon == log_backtrace_at.npos) {
absl::ClearLogBacktraceLocation();
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::ClearLogBacktraceLocation();
return;
}
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));
});
ABSL_FLAG(int, v, 0,
"Show all VLOG(m) messages for m <= this. Overridable by --vmodule.")
.OnUpdate([] {
absl::log_internal::UpdateGlobalVLogLevel(absl::GetFlag(FLAGS_v));
});
ABSL_FLAG(
std::string, vmodule, "",
"per-module log verbosity level."
" Argument is a comma-separated list of <module name>=<log level>."
" <module name> is a glob pattern, matched against the filename base"
" (that is, name ignoring .cc/.h./-inl.h)."
" A pattern without slashes matches just the file name portion, otherwise"
" the whole file path below the workspace root"
" (still without .cc/.h./-inl.h) is matched."
" ? and * in the glob pattern match any single or sequence of characters"
" respectively including slashes."
" <log level> overrides any value given by --v.")
.OnUpdate([] {
absl::log_internal::UpdateVModule(absl::GetFlag(FLAGS_vmodule));
});
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