Break the dep between fs and pgmconfig.

pkg/pgmconfig/config.go

@@ -27,7 +27,6 @@ import (
 const (
 	XDG_CONFIG_HOME     = "XDG_CONFIG_HOME"
 	defaultConfigSubdir = ".config"
-	PluginRoot          = "plugin"
 )
 
 // Use https://github.com/kirsle/configdir instead?

pkg/pgmconfig/constants.go

@@ -1,36 +1,28 @@
-/*
-Copyright 2017 The Kubernetes Authors.
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-// Package constants holds global constants for the kustomize tool.
+// Package pgmconfig holds global constants for the kustomize tool.
 package pgmconfig
 
 // KustomizationFileNames is a list of filenames
 // that kustomize recognizes.
 // To avoid ambiguity, a directory cannot contain
 // more than one match to this list.
-var KustomizationFileNames = []string{
-	"kustomization.yaml",
-	"kustomization.yml",
-	"Kustomization",
+func KustomizationFileNames() []string {
+	return []string{
+		KustomizationFileName0,
+		KustomizationFileName1,
+		KustomizationFileName2}
 }
 
 const (
+	KustomizationFileName0 = "kustomization.yaml"
+	KustomizationFileName1 = "kustomization.yml"
+	KustomizationFileName2 = "Kustomization"
 	// Program name, for help, finding the XDG_CONFIG_DIR, etc.
 	ProgramName = "kustomize"
 	// Domain from which kustomize code is imported, for locating
 	// plugin source code under $GOPATH.
 	DomainName = "sigs.k8s.io"
+	PluginRoot = "plugin"
 )