use istio client-go library instead of knative (#1661)

use istio client-go library instead of knative
bump kubernetes dependency version
change code coverage to codecov

vendor/k8s.io/apimachinery/pkg/apis/meta/v1/validation/validation.go

@@ -17,7 +17,11 @@ limitations under the License.
 package validation
 
 import (
+	"fmt"
+	"unicode"
+
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/validation"
 	"k8s.io/apimachinery/pkg/util/validation/field"
@@ -85,21 +89,67 @@ func ValidateDeleteOptions(options *metav1.DeleteOptions) field.ErrorList {
 		*options.PropagationPolicy != metav1.DeletePropagationOrphan {
 		allErrs = append(allErrs, field.NotSupported(field.NewPath("propagationPolicy"), options.PropagationPolicy, []string{string(metav1.DeletePropagationForeground), string(metav1.DeletePropagationBackground), string(metav1.DeletePropagationOrphan), "nil"}))
 	}
-	allErrs = append(allErrs, validateDryRun(field.NewPath("dryRun"), options.DryRun)...)
+	allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
 	return allErrs
 }
 
 func ValidateCreateOptions(options *metav1.CreateOptions) field.ErrorList {
-	return validateDryRun(field.NewPath("dryRun"), options.DryRun)
+	return append(
+		ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager")),
+		ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...,
+	)
 }
 
 func ValidateUpdateOptions(options *metav1.UpdateOptions) field.ErrorList {
-	return validateDryRun(field.NewPath("dryRun"), options.DryRun)
+	return append(
+		ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager")),
+		ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...,
+	)
+}
+
+func ValidatePatchOptions(options *metav1.PatchOptions, patchType types.PatchType) field.ErrorList {
+	allErrs := field.ErrorList{}
+	if patchType != types.ApplyPatchType {
+		if options.Force != nil {
+			allErrs = append(allErrs, field.Forbidden(field.NewPath("force"), "may not be specified for non-apply patch"))
+		}
+	} else {
+		if options.FieldManager == "" {
+			// This field is defaulted to "kubectl" by kubectl, but HAS TO be explicitly set by controllers.
+			allErrs = append(allErrs, field.Required(field.NewPath("fieldManager"), "is required for apply patch"))
+		}
+	}
+	allErrs = append(allErrs, ValidateFieldManager(options.FieldManager, field.NewPath("fieldManager"))...)
+	allErrs = append(allErrs, ValidateDryRun(field.NewPath("dryRun"), options.DryRun)...)
+	return allErrs
+}
+
+var FieldManagerMaxLength = 128
+
+// ValidateFieldManager valides that the fieldManager is the proper length and
+// only has printable characters.
+func ValidateFieldManager(fieldManager string, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+	// the field can not be set as a `*string`, so a empty string ("") is
+	// considered as not set and is defaulted by the rest of the process
+	// (unless apply is used, in which case it is required).
+	if len(fieldManager) > FieldManagerMaxLength {
+		allErrs = append(allErrs, field.TooLong(fldPath, fieldManager, FieldManagerMaxLength))
+	}
+	// Verify that all characters are printable.
+	for i, r := range fieldManager {
+		if !unicode.IsPrint(r) {
+			allErrs = append(allErrs, field.Invalid(fldPath, fieldManager, fmt.Sprintf("invalid character %#U (at position %d)", r, i)))
+		}
+	}
+
+	return allErrs
 }
 
 var allowedDryRunValues = sets.NewString(metav1.DryRunAll)
 
-func validateDryRun(fldPath *field.Path, dryRun []string) field.ErrorList {
+// ValidateDryRun validates that a dryRun query param only contains allowed values.
+func ValidateDryRun(fldPath *field.Path, dryRun []string) field.ErrorList {
 	allErrs := field.ErrorList{}
 	if !allowedDryRunValues.HasAll(dryRun...) {
 		allErrs = append(allErrs, field.NotSupported(fldPath, dryRun, allowedDryRunValues.List()))
@@ -108,3 +158,29 @@ func validateDryRun(fldPath *field.Path, dryRun []string) field.ErrorList {
 }
 
 const UninitializedStatusUpdateErrorMsg string = `must not update status when the object is uninitialized`
+
+// ValidateTableOptions returns any invalid flags on TableOptions.
+func ValidateTableOptions(opts *metav1.TableOptions) field.ErrorList {
+	var allErrs field.ErrorList
+	switch opts.IncludeObject {
+	case metav1.IncludeMetadata, metav1.IncludeNone, metav1.IncludeObject, "":
+	default:
+		allErrs = append(allErrs, field.Invalid(field.NewPath("includeObject"), opts.IncludeObject, "must be 'Metadata', 'Object', 'None', or empty"))
+	}
+	return allErrs
+}
+
+func ValidateManagedFields(fieldsList []metav1.ManagedFieldsEntry, fldPath *field.Path) field.ErrorList {
+	var allErrs field.ErrorList
+	for _, fields := range fieldsList {
+		switch fields.Operation {
+		case metav1.ManagedFieldsOperationApply, metav1.ManagedFieldsOperationUpdate:
+		default:
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("operation"), fields.Operation, "must be `Apply` or `Update`"))
+		}
+		if fields.FieldsType != "FieldsV1" {
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("fieldsType"), fields.FieldsType, "must be `FieldsV1`"))
+		}
+	}
+	return allErrs
+}