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/visit.go

@@ -0,0 +1,81 @@
+/*
+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 (
+	"go/ast"
+	"reflect"
+	"strconv"
+)
+
+// TypeCallback is a callback called for each raw AST (gendecl, typespec) combo.
+type TypeCallback func(file *ast.File, decl *ast.GenDecl, spec *ast.TypeSpec)
+
+// EachType calls the given callback for each (gendecl, typespec) combo in the
+// given package.  Generally, using markers.EachType is better when working
+// with marker data, and has a more convinient representation.
+func EachType(pkg *Package, cb TypeCallback) {
+	visitor := &typeVisitor{
+		callback: cb,
+	}
+	pkg.NeedSyntax()
+	for _, file := range pkg.Syntax {
+		visitor.file = file
+		ast.Walk(visitor, file)
+	}
+}
+
+// typeVisitor visits all TypeSpecs, calling the given callback for each.
+type typeVisitor struct {
+	callback TypeCallback
+	decl     *ast.GenDecl
+	file     *ast.File
+}
+
+// Visit visits all TypeSpecs.
+func (v *typeVisitor) Visit(node ast.Node) ast.Visitor {
+	if node == nil {
+		v.decl = nil
+		return v
+	}
+
+	switch typedNode := node.(type) {
+	case *ast.File:
+		v.file = typedNode
+		return v
+	case *ast.GenDecl:
+		v.decl = typedNode
+		return v
+	case *ast.TypeSpec:
+		v.callback(v.file, v.decl, typedNode)
+		return nil // don't recurse
+	default:
+		return nil
+	}
+}
+
+// ParseAstTag parses the given raw tag literal into a reflect.StructTag.
+func ParseAstTag(tag *ast.BasicLit) reflect.StructTag {
+	if tag == nil {
+		return reflect.StructTag("")
+	}
+	tagStr, err := strconv.Unquote(tag.Value)
+	if err != nil {
+		return reflect.StructTag("")
+	}
+	return reflect.StructTag(tagStr)
+}