vendor: revendor metrics-server, custom-metrics-apiserver

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

@@ -18,6 +18,7 @@ package validation
 
 import (
 	"fmt"
+	"regexp"
 	"unicode"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -184,3 +185,78 @@ func ValidateManagedFields(fieldsList []metav1.ManagedFieldsEntry, fldPath *fiel
 	}
 	return allErrs
 }
+
+func ValidateConditions(conditions []metav1.Condition, fldPath *field.Path) field.ErrorList {
+	var allErrs field.ErrorList
+
+	conditionTypeToFirstIndex := map[string]int{}
+	for i, condition := range conditions {
+		if _, ok := conditionTypeToFirstIndex[condition.Type]; ok {
+			allErrs = append(allErrs, field.Duplicate(fldPath.Index(i).Child("type"), condition.Type))
+		} else {
+			conditionTypeToFirstIndex[condition.Type] = i
+		}
+
+		allErrs = append(allErrs, ValidateCondition(condition, fldPath.Index(i))...)
+	}
+
+	return allErrs
+}
+
+// validConditionStatuses is used internally to check validity and provide a good message
+var validConditionStatuses = sets.NewString(string(metav1.ConditionTrue), string(metav1.ConditionFalse), string(metav1.ConditionUnknown))
+
+const (
+	maxReasonLen  = 1 * 1024
+	maxMessageLen = 32 * 1024
+)
+
+func ValidateCondition(condition metav1.Condition, fldPath *field.Path) field.ErrorList {
+	var allErrs field.ErrorList
+
+	// type is set and is a valid format
+	allErrs = append(allErrs, ValidateLabelName(condition.Type, fldPath.Child("type"))...)
+
+	// status is set and is an accepted value
+	if !validConditionStatuses.Has(string(condition.Status)) {
+		allErrs = append(allErrs, field.NotSupported(fldPath.Child("status"), condition.Status, validConditionStatuses.List()))
+	}
+
+	if condition.ObservedGeneration < 0 {
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("observedGeneration"), condition.ObservedGeneration, "must be greater than or equal to zero"))
+	}
+
+	if condition.LastTransitionTime.IsZero() {
+		allErrs = append(allErrs, field.Required(fldPath.Child("lastTransitionTime"), "must be set"))
+	}
+
+	if len(condition.Reason) == 0 {
+		allErrs = append(allErrs, field.Required(fldPath.Child("reason"), "must be set"))
+	} else {
+		for _, currErr := range isValidConditionReason(condition.Reason) {
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("reason"), condition.Reason, currErr))
+		}
+		if len(condition.Reason) > maxReasonLen {
+			allErrs = append(allErrs, field.TooLong(fldPath.Child("reason"), condition.Reason, maxReasonLen))
+		}
+	}
+
+	if len(condition.Message) > maxMessageLen {
+		allErrs = append(allErrs, field.TooLong(fldPath.Child("message"), condition.Message, maxMessageLen))
+	}
+
+	return allErrs
+}
+
+const conditionReasonFmt string = "[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?"
+const conditionReasonErrMsg string = "a condition reason must start with alphabetic character, optionally followed by a string of alphanumeric characters or '_,:', and must end with an alphanumeric character or '_'"
+
+var conditionReasonRegexp = regexp.MustCompile("^" + conditionReasonFmt + "$")
+
+// isValidConditionReason tests for a string that conforms to rules for condition reasons. This checks the format, but not the length.
+func isValidConditionReason(value string) []string {
+	if !conditionReasonRegexp.MatchString(value) {
+		return []string{validation.RegexError(conditionReasonErrMsg, conditionReasonFmt, "my_name", "MY_NAME", "MyName", "ReasonA,ReasonB", "ReasonA:ReasonB")}
+	}
+	return nil
+}