/
mergekey.go
59 lines (49 loc) · 1.74 KB
/
mergekey.go
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// Copyright 2022 The kpt 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 engine
import (
"context"
"fmt"
"github.com/GoogleContainerTools/kpt/internal/util/addmergecomment"
"github.com/GoogleContainerTools/kpt/porch/pkg/repository"
"sigs.k8s.io/kustomize/kyaml/kio"
)
// addMergeKeyMutation adds merge-key comment directive to reconcile
// identity of resources in a downstream package with the ones in upstream package
// This is required to ensure package update is able to merge resources in
// downstream package with upstream.
func ensureMergeKey(ctx context.Context, resources repository.PackageResources) (repository.PackageResources, error) {
pr := &packageReader{
input: resources,
extra: map[string]string{},
}
result := repository.PackageResources{
Contents: map[string]string{},
}
amc := &addmergecomment.AddMergeComment{}
pipeline := kio.Pipeline{
Inputs: []kio.Reader{pr},
Filters: []kio.Filter{kio.FilterAll(amc)},
Outputs: []kio.Writer{&packageWriter{
output: result,
}},
}
if err := pipeline.Execute(); err != nil {
return repository.PackageResources{}, fmt.Errorf("failed to add merge-key directive: %w", err)
}
for k, v := range pr.extra {
result.Contents[k] = v
}
return result, nil
}