Fix #1585 #1547 (#1624)

tools/goctl/rpc/generator/defaultgenerator.go

@@ -1,8 +1,7 @@
 package generator
 
 import (
-	"os/exec"
-
+	"github.com/zeromicro/go-zero/tools/goctl/env"
 	"github.com/zeromicro/go-zero/tools/goctl/util/console"
 )
 
@@ -25,17 +24,5 @@ func NewDefaultGenerator() Generator {
 // Prepare provides environment detection generated by rpc service,
 // including go environment, protoc, whether protoc-gen-go is installed or not
 func (g *DefaultGenerator) Prepare() error {
-	_, err := exec.LookPath("go")
-	if err != nil {
-		return err
-	}
-
-	_, err = exec.LookPath("protoc")
-	if err != nil {
-		return err
-	}
-
-	_, err = exec.LookPath("protoc-gen-go")
-
-	return err
+	return env.Prepare(true, true)
 }