One plugin per dir.

plugin/builtin/SecretGenerator.go

@@ -1,10 +1,5 @@
-// +build plugin
-
-// Copyright 2019 The Kubernetes Authors.
-// SPDX-License-Identifier: Apache-2.0
-
-//go:generate go run sigs.k8s.io/kustomize/cmd/pluginator
-package main
+// Code generated by pluginator on SecretGenerator; DO NOT EDIT.
+package builtin
 
 import (
 	"sigs.k8s.io/kustomize/pkg/ifc"
@@ -13,16 +8,18 @@ import (
 	"sigs.k8s.io/yaml"
 )
 
-type plugin struct {
+type SecretGeneratorPlugin struct {
 	ldr ifc.Loader
 	rf  *resmap.Factory
 	types.GeneratorOptions
 	types.SecretArgs
 }
 
-var KustomizePlugin plugin
+func NewSecretGeneratorPlugin() *SecretGeneratorPlugin {
+  return &SecretGeneratorPlugin{}
+}
 
-func (p *plugin) Config(
+func (p *SecretGeneratorPlugin) Config(
 	ldr ifc.Loader, rf *resmap.Factory, config []byte) (err error) {
 	p.GeneratorOptions = types.GeneratorOptions{}
 	p.SecretArgs = types.SecretArgs{}
@@ -32,7 +29,7 @@ func (p *plugin) Config(
 	return
 }
 
-func (p *plugin) Generate() (resmap.ResMap, error) {
+func (p *SecretGeneratorPlugin) Generate() (resmap.ResMap, error) {
 	argsList := make([]types.SecretArgs, 1)
 	argsList[0] = p.SecretArgs
 	return p.rf.NewResMapFromSecretArgs(