forked from openshift/ansible-service-broker
/
logger.go
107 lines (86 loc) · 2.16 KB
/
logger.go
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package app
import (
"errors"
"github.com/op/go-logging"
"io"
"os"
)
type LogConfig struct {
LogFile string
Stdout bool
Level string
Color bool
}
type Log struct {
*logging.Logger
file *os.File
}
const MODULE = "asb"
// TODO: Consider no output?
func NewLog(config LogConfig) (*Log, error) {
var err error
if config.LogFile == "" && !config.Stdout {
return nil, errors.New("Cannot have a blank logfile and not log to stdout")
}
// TODO: More validation? Check file is good?
// TODO: Validate level is actually possible?
log := &Log{}
logger := logging.MustGetLogger(MODULE)
var backends []logging.Backend
colorFormatter := logging.MustStringFormatter(
"%{color}[%{time}] [%{level}] %{message}%{color:reset}",
)
standardFormatter := logging.MustStringFormatter(
"[%{time}] [%{level}] %{message}",
)
var formattedBackend = func(writer io.Writer, isColored bool) logging.Backend {
backend := logging.NewLogBackend(writer, "", 0)
formatter := standardFormatter
if isColored {
formatter = colorFormatter
}
return logging.NewBackendFormatter(backend, formatter)
}
if config.LogFile != "" {
var logFile *os.File
if _, err = os.Stat(config.LogFile); os.IsNotExist(err) {
if logFile, err = os.Create(config.LogFile); err != nil {
logFile.Close()
return nil, err
}
} else {
if logFile, err = os.OpenFile(config.LogFile, os.O_APPEND|os.O_WRONLY, 0666); err != nil {
logFile.Close()
return nil, err
}
}
log.file = logFile
backends = append(backends, formattedBackend(logFile, false))
}
if config.Stdout {
backends = append(backends, formattedBackend(os.Stdout, config.Color))
}
multiBackend := logging.MultiLogger(backends...)
logger.SetBackend(multiBackend)
logging.SetLevel(levelFromString(config.Level), MODULE)
log.Logger = logger
return log, nil
}
func levelFromString(str string) logging.Level {
var level logging.Level
switch str {
case "critical":
level = logging.CRITICAL
case "error":
level = logging.ERROR
case "warning":
level = logging.WARNING
case "notice":
level = logging.NOTICE
case "info":
level = logging.INFO
default:
level = logging.DEBUG
}
return level
}