1 files changed, 120 insertions, 0 deletions
diff --git a/abseil-cpp/absl/log/flags.cc b/abseil-cpp/absl/log/flags.cc
new file mode 100644
index 0000000..215b7bd
--- /dev/null
+++ b/abseil-cpp/absl/log/flags.cc
@@ -0,0 +1,120 @@
+//
+// 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()) {
+        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));
+    });