Add boolptr helper package

Signed-off-by: Andy Goldstein <andy.goldstein@gmail.com>

pkg/util/boolptr/boolptr.go

@@ -0,0 +1,39 @@
+/*
+Copyright 2017 the Heptio Ark contributors.
+
+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 boolptr
+
+// IsSetToTrue returns true if and only if the bool pointer is non-nil and set to true.
+func IsSetToTrue(b *bool) bool {
+	return b != nil && *b == true
+}
+
+// IsSetToFalse returns true if and only if the bool pointer is non-nil and set to false.
+func IsSetToFalse(b *bool) bool {
+	return b != nil && *b == false
+}
+
+// True returns a *bool whose underlying value is true.
+func True() *bool {
+	t := true
+	return &t
+}
+
+// False returns a *bool whose underlying value is false.
+func False() *bool {
+	t := false
+	return &t
+}