logger: write internal / outlet errors to an error outlet

refs #28

cmd/config_logging.go

@@ -13,7 +13,7 @@ import (
 )
 
 type LoggingConfig struct {
-	Outlets logger.Outlets
+	Outlets *logger.Outlets
 }
 
 type MetadataFlags int64
@@ -26,10 +26,21 @@ const (
 	MetadataAll  MetadataFlags = ^0
 )
 
+func LoggerErrorOutlet() logger.Outlet {
+
+	formatter := &HumanFormatter{}
+	writer := os.Stderr
+	formatter.SetMetadataFlags(MetadataAll)
+	return WriterOutlet{
+		formatter, writer,
+	}
+}
+
 func parseLogging(i interface{}) (c *LoggingConfig, err error) {
 
 	c = &LoggingConfig{}
-	c.Outlets = logger.NewOutlets()
+
+	c.Outlets = logger.NewOutlets(LoggerErrorOutlet())
 
 	var asList []interface{}
 	if err = mapstructure.Decode(i, &asList); err != nil {

cmd/test.go

@@ -65,7 +65,7 @@ func init() {
 
 func testCmdGlobalInit(cmd *cobra.Command, args []string) {
 
-	out := logger.NewOutlets()
+	out := logger.NewOutlets(WriterOutlet{&NoFormatter{}, os.Stderr})
 	out.Add(WriterOutlet{&NoFormatter{}, os.Stdout}, logger.Info)
 	log := logger.NewLogger(out, 1*time.Second)
 	testCmdGlobal.log = log