Merge pull request #913 from sirupsen/example_caller_prettyfier

Example caller prettyfier

example_custom_caller_test.go

@@ -0,0 +1,28 @@
+package logrus_test
+
+import (
+	"os"
+	"path"
+	"runtime"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+)
+
+func ExampleCustomFormatter() {
+	l := logrus.New()
+	l.SetReportCaller(true)
+	l.Out = os.Stdout
+	l.Formatter = &logrus.JSONFormatter{
+		DisableTimestamp: true,
+		CallerPrettyfier: func(f *runtime.Frame) (string, string) {
+			s := strings.Split(f.Function, ".")
+			funcname := s[len(s)-1]
+			_, filename := path.Split(f.File)
+			return funcname, filename
+		},
+	}
+	l.Info("example of custom format caller")
+	// Output:
+	// {"file":"example_custom_caller_test.go","func":"ExampleCustomFormatter","level":"info","msg":"example of custom format caller"}
+}

json_formatter.go

@@ -93,7 +93,6 @@ func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
 		fileVal := fmt.Sprintf("%s:%d", entry.Caller.File, entry.Caller.Line)
 		if f.CallerPrettyfier != nil {
 			funcVal, fileVal = f.CallerPrettyfier(entry.Caller)
-			fmt.Println(funcVal, fileVal)
 		}
 		if funcVal != "" {
 			data[f.FieldMap.resolve(FieldKeyFunc)] = funcVal