Log to file optionally and update config locations

logger/logger.go

@@ -2,6 +2,7 @@ package logger
 
 import (
 	"fmt"
+	"io"
 	"log"
 	"os"
 	"sync"
@@ -48,6 +49,11 @@ func (l *Logger) SetLevel(level LogLevel) {
 	l.level = level
 }
 
+// SetOutput sets the output destination for the logger
+func (l *Logger) SetOutput(w io.Writer) {
+	l.logger.SetOutput(w)
+}
+
 // log handles the actual logging
 func (l *Logger) log(level LogLevel, format string, args ...interface{}) {
 	if level < l.level {
@@ -120,3 +126,8 @@ func Error(format string, args ...interface{}) {
 func Fatal(format string, args ...interface{}) {
 	GetLogger().Fatal(format, args...)
 }
+
+// SetOutput sets the output destination for the default logger
+func SetOutput(w io.Writer) {
+	GetLogger().SetOutput(w)
+}