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package logger
import (
"fmt"
"io"
golog "log"
"log/syslog"
"os"
"sync"
"gitlab.com/gitlab-org/gitlab-shell/go/internal/config"
log "github.com/sirupsen/logrus"
)
var (
logWriter io.Writer
bootstrapLogger *golog.Logger
pid int
mutex sync.Mutex
ProgName string
)
func Configure(cfg *config.Config) error {
mutex.Lock()
defer mutex.Unlock()
pid = os.Getpid()
var err error
logWriter, err = os.OpenFile(cfg.LogFile, os.O_WRONLY|os.O_APPEND, 0)
if err != nil {
return err
}
log.SetOutput(logWriter)
if cfg.LogFormat == "json" {
log.SetFormatter(&log.JSONFormatter{})
}
return nil
}
func logPrint(msg string, err error) {
mutex.Lock()
defer mutex.Unlock()
if logWriter == nil {
bootstrapLogPrint(msg, err)
return
}
log.WithError(err).WithFields(log.Fields{
"pid": pid,
}).Error(msg)
}
func Fatal(msg string, err error) {
logPrint(msg, err)
// We don't show the error to the end user because it can leak
// information that is private to the GitLab server.
fmt.Fprintf(os.Stderr, "%s: fatal: %s\n", ProgName, msg)
os.Exit(1)
}
// If our log file is not available we want to log somewhere else, but
// not to standard error because that leaks information to the user. This
// function attemps to log to syslog.
//
// We assume the logging mutex is already locked.
func bootstrapLogPrint(msg string, err error) {
if bootstrapLogger == nil {
var err error
bootstrapLogger, err = syslog.NewLogger(syslog.LOG_ERR|syslog.LOG_USER, 0)
if err != nil {
// The message will not be logged.
return
}
}
bootstrapLogger.Print(ProgName+":", msg+":", err)
}
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