use helper to detect import paths

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

gorilla.go

@@ -23,22 +23,18 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 
 		gorillaPackageFiles[file.GoPackageName] = struct{}{}
 		gname := "micro" + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
+		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
 
 		gfile.P("// Code generated by protoc-gen-micro")
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
-		gfile.P("import (")
-		gfile.P(`"fmt"`)
-		gfile.P(`"net/http"`)
-		gfile.P(`"reflect"`)
-		gfile.P(`"strings"`)
-		gfile.P()
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(`mux "github.com/gorilla/mux"`)
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(fmtPackage)
+		gfile.Import(httpPackage)
+		gfile.Import(reflectPackage)
+		gfile.Import(stringsPackage)
+		gfile.Import(microApiPackage)
+		gfile.Import(gorillaMuxPackage)
 
 		gfile.P("func RegisterHandlers(r *mux.Router, h interface{}, eps []*micro_api.Endpoint) error {")
 		gfile.P("v := reflect.ValueOf(h)")