/
level.go
78 lines (68 loc) · 2.04 KB
/
level.go
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package logging
// Copy-pasted from prometheus/common/promlog.
// Copyright 2017 The Prometheus 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
//
// http://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.
import (
"flag"
"github.com/go-kit/log/level"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// Level is a settable identifier for the minimum level a log entry
// must be have.
type Level struct {
s string
Logrus logrus.Level
Gokit level.Option
}
// RegisterFlags adds the log level flag to the provided flagset.
func (l *Level) RegisterFlags(f *flag.FlagSet) {
l.Set("info")
f.Var(l, "log.level", "Only log messages with the given severity or above. Valid levels: [debug, info, warn, error]")
}
func (l *Level) String() string {
return l.s
}
// UnmarshalYAML implements yaml.Unmarshaler.
func (l *Level) UnmarshalYAML(unmarshal func(interface{}) error) error {
var level string
if err := unmarshal(&level); err != nil {
return err
}
return l.Set(level)
}
// MarshalYAML implements yaml.Marshaler.
func (l Level) MarshalYAML() (interface{}, error) {
return l.String(), nil
}
// Set updates the value of the allowed level. Implments flag.Value.
func (l *Level) Set(s string) error {
switch s {
case "debug":
l.Logrus = logrus.DebugLevel
l.Gokit = level.AllowDebug()
case "info":
l.Logrus = logrus.InfoLevel
l.Gokit = level.AllowInfo()
case "warn":
l.Logrus = logrus.WarnLevel
l.Gokit = level.AllowWarn()
case "error":
l.Logrus = logrus.ErrorLevel
l.Gokit = level.AllowError()
default:
return errors.Errorf("unrecognized log level %q", s)
}
l.s = s
return nil
}