Build for apimachinery builders from vendor

Makefile

@@ -293,9 +293,8 @@ examples:
 # api machinery regenerate
 
 apimachinery:
-	# conversion: go install ./cmd/libs/go2idl/conversion-gen
+	./hack/make-apimachinery.sh
 	${GOPATH}/bin/conversion-gen --skip-unsafe=true --input-dirs k8s.io/kops/pkg/apis/kops/v1alpha1 --v=8  --output-file-base=zz_generated.conversion
-	# defaulters: go install ./cmd/libs/go2idl/defaulter-gen
 	${GOPATH}/bin/defaulter-gen --input-dirs k8s.io/kops/pkg/apis/kops/v1alpha1 --v=8  --output-file-base=zz_generated.defaults
 	${GOPATH}/bin/defaulter-gen --input-dirs k8s.io/kops/pkg/apis/kops/v1alpha2 --v=8  --output-file-base=zz_generated.defaults
 	#go install github.com/ugorji/go/codec/codecgen

hack/make-apimachinery.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# Copyright 2016 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.
+
+# Build apimachinery executables from vendor-ed dependencies
+
+. $(dirname "${BASH_SOURCE}")/common.sh
+
+WORK_DIR=`mktemp -d`
+
+function cleanup {
+  rm -rf "$WORK_DIR"
+}
+trap cleanup EXIT
+
+mkdir -p ${WORK_DIR}/go/
+ln -s ${GOPATH}/src/k8s.io/kops/vendor/ ${WORK_DIR}/go/src
+
+GOPATH=${WORK_DIR}/go/ go install k8s.io/kubernetes/cmd/libs/go2idl/conversion-gen
+cp ${WORK_DIR}/go/bin/conversion-gen ${GOPATH}/bin/
+
+GOPATH=${WORK_DIR}/go/ go install k8s.io/kubernetes/cmd/libs/go2idl/defaulter-gen
+cp ${WORK_DIR}/go/bin/defaulter-gen ${GOPATH}/bin/