implement rest scoper

return filesystem errors

fixes #549

example/non-etcd/go.mod

@@ -6,34 +6,23 @@ require (
 	github.com/go-logr/zapr v0.1.1 // indirect
 	github.com/go-openapi/loads v0.19.4
 	github.com/go-openapi/spec v0.19.3
-	github.com/golang/protobuf v1.3.4 // indirect
-	github.com/google/go-cmp v0.3.1 // indirect
-	github.com/gorilla/websocket v1.4.1 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190723091251-e0797f438f94 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/kubernetes-incubator/reference-docs v0.0.0 // indirect
 	github.com/markbates/inflect v1.0.4 // indirect
-	github.com/onsi/ginkgo v1.11.0
-	github.com/onsi/gomega v1.8.1
-	github.com/pkg/errors v0.8.1 // indirect
-	github.com/spf13/cobra v0.0.5 // indirect
+	github.com/onsi/ginkgo v1.14.1
+	github.com/onsi/gomega v1.10.2
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	golang.org/x/net v0.0.0-20191004110552-13f9640d40b9
-	golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 // indirect
-	k8s.io/api v0.18.4 // indirect
-	k8s.io/apimachinery v0.18.4
-	k8s.io/apiserver v0.18.4
-	k8s.io/client-go v0.18.4
-	k8s.io/gengo v0.0.0-20200114144118-36b2048a9120 // indirect
+	golang.org/x/net v0.0.0-20200707034311-ab3426394381
+	k8s.io/apimachinery v0.19.2
+	k8s.io/apiserver v0.19.2
+	k8s.io/client-go v0.19.2
 	k8s.io/klog v1.0.0
 	k8s.io/kube-aggregator v0.18.4 // indirect
-	k8s.io/kube-openapi v0.0.0-20200410145947-61e04a5be9a6
-	k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89 // indirect
+	k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6
 	sigs.k8s.io/apiserver-builder-alpha v1.18.0
 	sigs.k8s.io/controller-runtime v0.6.0
 	sigs.k8s.io/controller-tools v0.1.12 // indirect
-	sigs.k8s.io/kubebuilder v1.0.8 // indirect
 	sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06 // indirect
 	sigs.k8s.io/testing_frameworks v0.1.1 // indirect
 )