switch to go vendoring

vendor/github.com/gookit/goutil/sysutil/sysutil.go

@@ -0,0 +1,24 @@
+// Package sysutil provide some system util functions. eg: sysenv, exec, user, process
+package sysutil
+
+import (
+	"os"
+	"path"
+)
+
+// Workdir get
+func Workdir() string {
+	dir, _ := os.Getwd()
+	return dir
+}
+
+// BinDir get
+func BinDir() string {
+	binFile := os.Args[0]
+	return path.Dir(binFile)
+}
+
+// BinFile get
+func BinFile() string {
+	return os.Args[0]
+}