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Merge pull request #57500 from niuzhenguo/unique-resource-mappings

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Automatic merge from submit-queue (batch tested with PRs 57500, 58840, 58883). 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>.

Make REST mappings for resources a unique list

This ensures the mappings list for resources(shortcuts, plural) unique,
instead of doing multiple requests to server for the same resource.



**What this PR does / why we need it**:
Treat resource shortcuts, plurals the same thing on kubectl side instead of doing multiple requests to servers, and outputs should not duplicate entires.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #57498 

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2018-01-26 13:34:33 -08:00 committed by GitHub
commit c338209e4f
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1 changed files with 6 additions and 0 deletions
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6
pkg/kubectl/resource/builder.go
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@ -622,11 +622,17 @@ func (b *Builder) resourceMappings() ([]*meta.RESTMapping, error) {
return nil, fmt.Errorf("you may only specify a single resource type")
}
mappings := []*meta.RESTMapping{}
seen := map[schema.GroupVersionKind]bool{}
for _, r := range b.resources {
mapping, err := b.mappingFor(r)
if err != nil {
return nil, err
}
// This ensures the mappings for resources(shortcuts, plural) unique
if seen[mapping.GroupVersionKind] {
continue
}
seen[mapping.GroupVersionKind] = true
mappings = append(mappings, mapping)
}