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logger.go
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logger.go
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// Copyright 2018 Shift Devices AG
//
// 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.
package logging
import (
"fmt"
"os"
"path/filepath"
"github.com/digitalbitbox/bitbox-wallet-app/util/errp"
"github.com/sirupsen/logrus"
)
// Logger adds a method to the logrus logger.
type Logger struct {
logrus.Logger
}
// NewLogger returns a new logger based on the given configuration.
func NewLogger(configuration *Configuration) *Logger {
var logger = Logger{}
logger.Formatter = &logrus.TextFormatter{}
logger.Hooks = make(logrus.LevelHooks)
logger.AddHook(stackHook{
stackLevels: []logrus.Level{logrus.PanicLevel, logrus.FatalLevel, logrus.ErrorLevel, logrus.WarnLevel},
})
switch configuration.Output {
case "STDOUT":
logger.Out = os.Stdout
case "STDERR":
logger.Out = os.Stderr
default:
if err := os.MkdirAll(filepath.Dir(configuration.Output), os.ModeDir|os.ModePerm); err != nil {
panic(errp.WithStack(err))
}
file, err := os.OpenFile(configuration.Output, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
panic(errp.WithStack(err))
}
logger.Out = file
}
logger.Level = configuration.Level
fmt.Printf("Logging into '%s' from '%s'.\n", configuration.Output, configuration.Level)
return &logger
}
// WithGroup sets a trace group for the log entry.
func (logger *Logger) WithGroup(group string) *logrus.Entry {
return logger.WithField("group", group)
}