Code refactor, adding GoLand workspace with Bazel plugin.

mapping/elf/core.go

@@ -143,14 +143,7 @@ func reload() {
 	parsedFunc = &globals
 }
 
-func GetMapping(ip string) string {
-	thread := pool.Get()
-	ret, err := starlark.Call(thread, (*parsedFunc)["getMapping"],
-		starlark.Tuple{starlark.String(ip)}, nil)
-	if err != nil {
-		log.Println("Starlark execute error:", err.Error())
-		return ""
-	}
+func getTarget(ret starlark.Value) string {
 	switch r := ret.(type) {
 	case starlark.String:
 		return string(r)
@@ -205,6 +198,17 @@ scriptError:
 	return ""
 }
 
+func GetMapping(ip string) string {
+	thread := pool.Get()
+	ret, err := starlark.Call(thread, (*parsedFunc)["getMapping"],
+		starlark.Tuple{starlark.String(ip)}, nil)
+	if err != nil {
+		log.Println("Starlark execute error:", err.Error())
+		return ""
+	}
+	return getTarget(ret)
+}
+
 func GetNodes() (res []string) {
 	thread := pool.Get()
 	ret, err := starlark.Call(thread, (*parsedFunc)["getNodes"], nil, nil)
@@ -215,12 +219,11 @@ func GetNodes() (res []string) {
 	if r, ok := ret.(*starlark.List); ok {
 		res = make([]string, r.Len())
 		for i := 0; i < r.Len(); i++ {
-			v := r.Index(i)
-			if s, ok := v.(starlark.String); ok {
-				res[i] = string(s)
-			} else {
+			res[i] = getTarget(r.Index(i))
+			if res[i] == "" {
 				log.Println("Script returned unexpected result:",
 					ret.String())
+				return nil
 			}
 		}
 	} else {