nvidia-container-toolkit/cmd/nvidia-container-runtime/logger.go
Evan Lezar b6a585c77d Copy code from nvidia-container-runtime
This change copies the cmd/nvidia-container-runtime, internal, and test
folders from github.com/NVIDIA/nvidia-container-runtime@8a63b4b34f3ce3b4167f0516aa3f7207ca280dfb

Signed-off-by: Evan Lezar <elezar@nvidia.com>
2021-09-07 13:13:03 +02:00

80 lines
2.0 KiB
Go

/*
# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
#
# 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 main
import (
"fmt"
"io"
"os"
"github.com/sirupsen/logrus"
"github.com/tsaikd/KDGoLib/logrusutil"
)
// Logger adds a way to manage output to a log file to a logrus.Logger
type Logger struct {
*logrus.Logger
previousOutput io.Writer
logFile *os.File
}
// NewLogger constructs a Logger with a preddefined formatter
func NewLogger() *Logger {
logrusLogger := logrus.New()
formatter := &logrusutil.ConsoleLogFormatter{
TimestampFormat: "2006/01/02 15:04:07",
Flag: logrusutil.Ltime,
}
logger := &Logger{
Logger: logrusLogger,
}
logger.SetFormatter(formatter)
return logger
}
// LogToFile opens the specified file for appending and sets the logger to
// output to the opened file. A reference to the file pointer is stored to
// allow this to be closed.
func (l *Logger) LogToFile(filename string) error {
logFile, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return fmt.Errorf("error opening debug log file: %v", err)
}
l.logFile = logFile
l.previousOutput = l.Out
l.SetOutput(logFile)
return nil
}
// CloseFile closes the log file (if any) and resets the logger output to what it
// was before LogToFile was called.
func (l *Logger) CloseFile() error {
if l.logFile == nil {
return nil
}
logFile := l.logFile
l.SetOutput(l.previousOutput)
l.logFile = nil
return logFile.Close()
}