Use apiextension v1

- upgrade from apiextension v1beta1 to v1
 - generate yaml manifest for crd intead of applying it at runtime
  - users will have to apply the manifest with kubectl
 - kg and kgctl log an error if the crd is not present
 - now validation should actually work

Signed-off-by: leonnicolas <leonloechner@gmx.de>

vendor/sigs.k8s.io/controller-tools/pkg/loader/errors.go

@@ -0,0 +1,67 @@
+/*
+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 loader
+
+import (
+	"fmt"
+	"go/token"
+)
+
+// PositionedError represents some error with an associated position.
+// The position is tied to some external token.FileSet.
+type PositionedError struct {
+	Pos token.Pos
+	error
+}
+
+// Node is the intersection of go/ast.Node and go/types.Var.
+type Node interface {
+	Pos() token.Pos // position of first character belonging to the node
+}
+
+// ErrFromNode returns the given error, with additional information
+// attaching it to the given AST node.  It will automatically map
+// over error lists.
+func ErrFromNode(err error, node Node) error {
+	if asList, isList := err.(ErrList); isList {
+		resList := make(ErrList, len(asList))
+		for i, baseErr := range asList {
+			resList[i] = ErrFromNode(baseErr, node)
+		}
+		return resList
+	}
+	return PositionedError{
+		Pos:   node.Pos(),
+		error: err,
+	}
+}
+
+// MaybeErrList constructs an ErrList if the given list of
+// errors has any errors, otherwise returning nil.
+func MaybeErrList(errs []error) error {
+	if len(errs) == 0 {
+		return nil
+	}
+	return ErrList(errs)
+}
+
+// ErrList is a list of errors aggregated together into a single error.
+type ErrList []error
+
+func (l ErrList) Error() string {
+	return fmt.Sprintf("%v", []error(l))
+}