vendor update for E2E framework

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/kubernetes/pkg/kubectl/util/rbac/rbac.go

@@ -0,0 +1,128 @@
+/*
+Copyright 2018 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 rbac
+
+import (
+	rbacv1 "k8s.io/api/rbac/v1"
+	"reflect"
+	"strings"
+)
+
+type simpleResource struct {
+	Group             string
+	Resource          string
+	ResourceNameExist bool
+	ResourceName      string
+}
+
+// CompactRules combines rules that contain a single APIGroup/Resource, differ only by verb, and contain no other attributes.
+// this is a fast check, and works well with the decomposed "missing rules" list from a Covers check.
+func CompactRules(rules []rbacv1.PolicyRule) ([]rbacv1.PolicyRule, error) {
+	compacted := make([]rbacv1.PolicyRule, 0, len(rules))
+
+	simpleRules := map[simpleResource]*rbacv1.PolicyRule{}
+	for _, rule := range rules {
+		if resource, isSimple := isSimpleResourceRule(&rule); isSimple {
+			if existingRule, ok := simpleRules[resource]; ok {
+				// Add the new verbs to the existing simple resource rule
+				if existingRule.Verbs == nil {
+					existingRule.Verbs = []string{}
+				}
+				existingRule.Verbs = append(existingRule.Verbs, rule.Verbs...)
+			} else {
+				// Copy the rule to accumulate matching simple resource rules into
+				simpleRules[resource] = rule.DeepCopy()
+			}
+		} else {
+			compacted = append(compacted, rule)
+		}
+	}
+
+	// Once we've consolidated the simple resource rules, add them to the compacted list
+	for _, simpleRule := range simpleRules {
+		compacted = append(compacted, *simpleRule)
+	}
+
+	return compacted, nil
+}
+
+// isSimpleResourceRule returns true if the given rule contains verbs, a single resource, a single API group, at most one Resource Name, and no other values
+func isSimpleResourceRule(rule *rbacv1.PolicyRule) (simpleResource, bool) {
+	resource := simpleResource{}
+
+	// If we have "complex" rule attributes, return early without allocations or expensive comparisons
+	if len(rule.ResourceNames) > 1 || len(rule.NonResourceURLs) > 0 {
+		return resource, false
+	}
+	// If we have multiple api groups or resources, return early
+	if len(rule.APIGroups) != 1 || len(rule.Resources) != 1 {
+		return resource, false
+	}
+
+	// Test if this rule only contains APIGroups/Resources/Verbs/ResourceNames
+	simpleRule := &rbacv1.PolicyRule{APIGroups: rule.APIGroups, Resources: rule.Resources, Verbs: rule.Verbs, ResourceNames: rule.ResourceNames}
+	if !reflect.DeepEqual(simpleRule, rule) {
+		return resource, false
+	}
+
+	if len(rule.ResourceNames) == 0 {
+		resource = simpleResource{Group: rule.APIGroups[0], Resource: rule.Resources[0], ResourceNameExist: false}
+	} else {
+		resource = simpleResource{Group: rule.APIGroups[0], Resource: rule.Resources[0], ResourceNameExist: true, ResourceName: rule.ResourceNames[0]}
+	}
+
+	return resource, true
+}
+
+// BreakdownRule takes a rule and builds an equivalent list of rules that each have at most one verb, one
+// resource, and one resource name
+func BreakdownRule(rule rbacv1.PolicyRule) []rbacv1.PolicyRule {
+	subrules := []rbacv1.PolicyRule{}
+	for _, group := range rule.APIGroups {
+		for _, resource := range rule.Resources {
+			for _, verb := range rule.Verbs {
+				if len(rule.ResourceNames) > 0 {
+					for _, resourceName := range rule.ResourceNames {
+						subrules = append(subrules, rbacv1.PolicyRule{APIGroups: []string{group}, Resources: []string{resource}, Verbs: []string{verb}, ResourceNames: []string{resourceName}})
+					}
+
+				} else {
+					subrules = append(subrules, rbacv1.PolicyRule{APIGroups: []string{group}, Resources: []string{resource}, Verbs: []string{verb}})
+				}
+
+			}
+		}
+	}
+
+	// Non-resource URLs are unique because they only combine with verbs.
+	for _, nonResourceURL := range rule.NonResourceURLs {
+		for _, verb := range rule.Verbs {
+			subrules = append(subrules, rbacv1.PolicyRule{NonResourceURLs: []string{nonResourceURL}, Verbs: []string{verb}})
+		}
+	}
+
+	return subrules
+}
+
+// SortableRuleSlice is used to sort rule slice
+type SortableRuleSlice []rbacv1.PolicyRule
+
+func (s SortableRuleSlice) Len() int      { return len(s) }
+func (s SortableRuleSlice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
+func (s SortableRuleSlice) Less(i, j int) bool {
+	return strings.Compare(s[i].String(), s[j].String()) < 0
+}