add mlog package to stack filter list (#717)

server/services/mlog/mlog.go

@@ -8,6 +8,8 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
+	"runtime"
+	"strings"
 	"time"
 
 	"github.com/mattermost/logr/v2"
@@ -18,6 +20,18 @@ const (
 	ShutdownTimeout = time.Second * 15
 )
 
+var (
+	mlogPkg string
+)
+
+func init() {
+	// Calc current package name
+	pcs := make([]uintptr, 2)
+	_ = runtime.Callers(0, pcs)
+	tmp := runtime.FuncForPC(pcs[1]).Name()
+	mlogPkg = GetPackageName(tmp)
+}
+
 // Type and function aliases from Logr to limit the spread of dependencies throughout Focalboard.
 type Field = logr.Field
 type Level = logr.Level
@@ -108,6 +122,8 @@ type Logger struct {
 
 // NewLogger creates a new Logger instance which can be configured via `(*Logger).Configure`.
 func NewLogger(options ...Option) *Logger {
+	options = append(options, logr.StackFilter(GetPackageName(mlogPkg)))
+
 	lgr, _ := logr.New(options...)
 	log := lgr.NewLogger()
 
@@ -248,3 +264,18 @@ func (l *Logger) Shutdown() error {
 	defer cancel()
 	return l.log.Logr().ShutdownWithTimeout(ctx)
 }
+
+// GetPackageName reduces a fully qualified function name to the package name
+// By sirupsen: https://github.com/sirupsen/logrus/blob/master/entry.go
+func GetPackageName(f string) string {
+	for {
+		lastPeriod := strings.LastIndex(f, ".")
+		lastSlash := strings.LastIndex(f, "/")
+		if lastPeriod > lastSlash {
+			f = f[:lastPeriod]
+		} else {
+			break
+		}
+	}
+	return f
+}