initial commit

logger.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	logger "log"
+	"os"
+)
+
+var log *logger.Logger
+
+func newLogger(file string) {
+	if file == "" {
+		log = logger.New(os.Stdout, "", logger.LstdFlags)
+		return
+	}
+	f, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
+	if err != nil {
+		logger.Fatal(err)
+	}
+	logger.SetOutput(f)
+	log = logger.New(f, "", logger.LstdFlags)
+}