fix issue #831 (#850)

* fix issue #831

* fix typo

Co-authored-by: anqiansong <anqiansong@xiaoheiban.cn>

tools/goctl/util/file.go

@@ -17,6 +17,12 @@ const (
 	goctlDir = ".goctl"
 )
 
+var goctlHome string
+
+func RegisterGoctlHome(home string) {
+	goctlHome = home
+}
+
 // CreateIfNotExist creates a file if it is not exists
 func CreateIfNotExist(file string) (*os.File, error) {
 	_, err := os.Stat(file)
@@ -62,6 +68,10 @@ func FileNameWithoutExt(file string) string {
 
 // GetGoctlHome returns the path value of the goctl home where Join $HOME with .goctl
 func GetGoctlHome() (string, error) {
+	if len(goctlHome) != 0 {
+		return goctlHome, nil
+	}
+
 	home, err := os.UserHomeDir()
 	if err != nil {
 		return "", err