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Merge pull request #61905 from mengqiy/mergePatchesInSMP

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

add a func to merge multiple Strategic Merge Patches into one patch

This PR is adding a function similar to 9fa11df836/merge.go (L95-L100)
It merges multiple SMPs and yield another SMP.

This PR has no risk to existing SMP code.

```release-note
NONE
```
/cc @apelisse
/assign @pwittrock
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Kubernetes Submit Queue 2018-04-05 13:30:03 -07:00 committed by GitHub
commit 6a8ebdca90
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23
staging/src/k8s.io/apimachinery/pkg/util/strategicpatch/patch.go
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@ -880,6 +880,29 @@ func StrategicMergeMapPatchUsingLookupPatchMeta(original, patch JSONMap, schema
return mergeMap(original, patch, schema, mergeOptions) return mergeMap(original, patch, schema, mergeOptions)
} }
// MergeStrategicMergeMapPatchUsingLookupPatchMeta merges strategic merge
// patches retaining `null` fields and parallel lists. If 2 patches change the
// same fields and the latter one will override the former one. If you don't
// want that happen, you need to run func MergingMapsHaveConflicts before
// merging these patches. Applying the resulting merged merge patch to a JSONMap
// yields the same as merging each strategic merge patch to the JSONMap in
// succession.
func MergeStrategicMergeMapPatchUsingLookupPatchMeta(schema LookupPatchMeta, patches ...JSONMap) (JSONMap, error) {
mergeOptions := MergeOptions{
MergeParallelList: false,
IgnoreUnmatchedNulls: false,
}
merged := JSONMap{}
var err error
for _, patch := range patches {
merged, err = mergeMap(merged, patch, schema, mergeOptions)
if err != nil {
return nil, err
}
}
return merged, nil
}
// handleDirectiveInMergeMap handles the patch directive when merging 2 maps. // handleDirectiveInMergeMap handles the patch directive when merging 2 maps.
func handleDirectiveInMergeMap(directive interface{}, patch map[string]interface{}) (map[string]interface{}, error) { func handleDirectiveInMergeMap(directive interface{}, patch map[string]interface{}) (map[string]interface{}, error) {
if directive == replaceDirective { if directive == replaceDirective {