Add dependencies for code generator

vendor/k8s.io/code-generator/pkg/util/build.go

@@ -0,0 +1,61 @@
+/*
+Copyright 2017 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 util
+
+import (
+	gobuild "go/build"
+	"path"
+	"path/filepath"
+	"reflect"
+	"strings"
+)
+
+type empty struct{}
+
+// CurrentPackage returns the go package of the current directory, or "" if it cannot
+// be derived from the GOPATH.
+func CurrentPackage() string {
+	for _, root := range gobuild.Default.SrcDirs() {
+		if pkg, ok := hasSubdir(root, "."); ok {
+			return pkg
+		}
+	}
+	return ""
+}
+
+func hasSubdir(root, dir string) (rel string, ok bool) {
+	// ensure a tailing separator to properly compare on word-boundaries
+	const sep = string(filepath.Separator)
+	root = filepath.Clean(root)
+	if !strings.HasSuffix(root, sep) {
+		root += sep
+	}
+
+	// check whether root dir starts with root
+	dir = filepath.Clean(dir)
+	if !strings.HasPrefix(dir, root) {
+		return "", false
+	}
+
+	// cut off root
+	return filepath.ToSlash(dir[len(root):]), true
+}
+
+// BoilerplatePath uses the boilerplate in code-generator by calculating the relative path to it.
+func BoilerplatePath() string {
+	return path.Join(reflect.TypeOf(empty{}).PkgPath(), "/../../hack/boilerplate.go.txt")
+}