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package logger
import (
"fmt"
"io"
"io/ioutil"
golog "log"
"log/syslog"
"math"
"os"
"sync"
"time"
"gitlab.com/gitlab-org/gitlab-shell/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()
ProgName, _ = os.Executable()
// Avoid leaking output if we can't set up the logging output
log.SetOutput(ioutil.Discard)
output, err := os.OpenFile(cfg.LogFile, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
if err != nil {
setupBootstrapLogger()
logPrint("Unable to configure logging", err)
return err
}
logWriter = output
log.SetOutput(logWriter)
if cfg.LogFormat == "json" {
log.SetFormatter(&log.JSONFormatter{})
}
return nil
}
// 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 attempts to log to syslog.
func logPrint(msg string, err error) {
if logWriter == nil {
if bootstrapLogger != nil {
bootstrapLogger.Print(ProgName+":", msg+":", err)
}
return
}
log.WithError(err).WithFields(log.Fields{
"pid": pid,
}).Error(msg)
}
func Fatal(msg string, err error) {
mutex.Lock()
defer mutex.Unlock()
setupBootstrapLogger()
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)
}
// We assume the logging mutex is already locked.
func setupBootstrapLogger() {
if bootstrapLogger == nil {
bootstrapLogger, _ = syslog.NewLogger(syslog.LOG_ERR|syslog.LOG_USER, 0)
}
}
func ElapsedTime(since time.Time) float64 {
// Later versions of Go support Milliseconds directly:
// https://go-review.googlesource.com/c/go/+/167387/
return roundFloat(time.Since(since).Seconds() * 1e3)
}
func roundFloat(x float64) float64 {
return round(x, 0.001)
}
func round(x, unit float64) float64 {
return math.Round(x/unit) * unit
}
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