40 lines
1.4 KiB
Go
40 lines
1.4 KiB
Go
/*
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Copyright 2025 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package validate
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import (
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"context"
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"k8s.io/apimachinery/pkg/api/operation"
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"k8s.io/apimachinery/pkg/util/validation/field"
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)
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// Immutable verifies that the specified value has not changed in the course of
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// an update operation. It does nothing if the old value is not provided.
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//
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// This function unconditionally returns a validation error as it
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// relies on the default ratcheting mechanism to only be called when a
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// change to the field has already been detected. This avoids a redundant
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// equivalence check across ratcheting and this function.
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func Immutable[T any](_ context.Context, op operation.Operation, fldPath *field.Path, _, _ T) field.ErrorList {
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if op.Type != operation.Update {
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return nil
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}
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return field.ErrorList{
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field.Invalid(fldPath, nil, "field is immutable").WithOrigin("immutable"),
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}
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}
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