Put goplugins behind flag.

pkg/pgmconfig/config.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+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 commands holds the CLI glue mapping textual commands/args to method calls.
+package pgmconfig
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+const (
+	XDG_CONFIG_HOME     = "XDG_CONFIG_HOME"
+	defaultConfigSubdir = ".config"
+)
+
+// Use https://github.com/kirsle/configdir instead?
+func ConfigRoot() string {
+	dir := os.Getenv(XDG_CONFIG_HOME)
+	if len(dir) == 0 {
+		dir = filepath.Join(
+			homeDir(), defaultConfigSubdir)
+	}
+	return filepath.Join(dir, PgmName)
+}
+
+func homeDir() string {
+	home := os.Getenv(homeEnv())
+	if len(home) > 0 {
+		return home
+	}
+	return "~"
+}
+
+func homeEnv() string {
+	if runtime.GOOS == "windows" {
+		return "USERPROFILE"
+	}
+	return "HOME"
+}