Finalizing for 1.2.0

logging/funcs_std.go

@@ -2,6 +2,7 @@ package logging
 
 import (
 	"fmt"
+	`io`
 	`log`
 	`os`
 	`strings`
@@ -13,14 +14,34 @@ import (
 */
 func (l *StdLogger) Setup() (err error) {
 
+	var multi io.Writer
+
 	// This uses a shared handle across the import. We don't want that.
 	// l.Logger = log.Default()
 	if l.Prefix != "" {
 		l.Prefix = strings.TrimRight(l.Prefix, " ") + " "
 		// l.Logger.SetPrefix(l.Prefix)
 	}
-	// (stdlib).log.std is returned by log.Default(), which uses os.Stderr.
-	l.Logger = log.New(os.Stderr, l.Prefix, l.LogFlags)
+	// (stdlib).log.std is returned by log.Default(), which uses os.Stderr but we have flags for that.
+	// https://stackoverflow.com/a/36719588/733214
+	switch {
+	case l.EnableStdErr && l.EnableStdOut:
+		multi = io.MultiWriter(os.Stdout, os.Stderr)
+	case l.EnableStdErr:
+		multi = os.Stderr
+	case l.EnableStdOut:
+		multi = os.Stdout
+	default:
+		multi = nil
+	}
+	if multi != nil {
+		l.Logger = log.New(multi, l.Prefix, l.LogFlags)
+	} else {
+		// This honestly should throw an error.
+		l.Logger = &log.Logger{}
+		l.Logger.SetPrefix(l.Prefix)
+		l.Logger.SetFlags(l.LogFlags)
+	}
 
 	return
 }