use helper to detect import paths

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

http.go

@@ -25,7 +25,7 @@ func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin) erro
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_micro_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
+		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
 
 		gfile.P("// Code generated by protoc-gen-micro")
 		gfile.P("// source: ", *file.Proto.Name)
@@ -87,9 +87,14 @@ func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin) erro
 		}
 	}
 
-	for file, err := range files {
-		gfile := plugin.NewGeneratedFile(file+"_micro_errors.pb.go", ".")
-		generateServiceErrors(gfile, err)
+	for _, file := range plugin.Files {
+		for efile, err := range files {
+			if file.GeneratedFilenamePrefix != efile {
+				continue
+			}
+			gfile := plugin.NewGeneratedFile(efile+"_micro_errors.pb.go", file.GoImportPath)
+			generateServiceErrors(gfile, err)
+		}
 	}
 
 	return nil