Automatic merge from submit-queue (batch tested with PRs 53606, 49361). 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 ApproximatePodTemplateForObject factory method
Makes it possible to get at a pod spec template even if an object is scaled to zero, for use with commands that care about pod templates.
**Release note**:
```release-note
NONE
```
Related downstream patch and use-case: https://github.com/openshift/origin/pull/16379
cc @smarterclayton
Automatic merge from submit-queue (batch tested with PRs 51771, 52971). 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>.
pass labelSelector to server side opaquely
**What this PR does / why we need it**:
From @smarterclayton
> The server is responsible for handling label selection for the most part. There is some level of client side processing possible, but for the most part `label selector` should be able to be passed opaquely.
xref #50140
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
/assign @smarterclayton @liggitt
**Release note**:
```release-note
None
```
**What this PR does / why we need it**:
Makes functions in validation/schema.go private to kubectl,
further isolating kubectl.
**Which issue this PR fixes**
Part of a series of PRs to address kubernetes/community#598
**Release note**:
```release-note
NONE
```
Get command now uses metadata x-kubernetes-print-columns, if present, in Openapi schema
to format output for a resource. This functionality is guarded by a boolean
flag 'use-openapi-print-columns'.
Automatic merge from submit-queue (batch tested with PRs 42087, 43383, 43622)
move category expansion out of restmapper
RESTMapping isn't related to CategoryExpansion (the bit that expands "all" into items to be RESTMapped). This provides that separation and simplifies the RESTMapper interface.
@kubernetes/sig-cli-pr-reviews
The factory knows all possible types, and should abstract the process of
creating all printers. A future refactor can further reduce the
dependencies between printer code and internal types.
Automatic merge from submit-queue (batch tested with PRs 41706, 39063, 41330, 41739, 41576)
deprecate and disconnect --output-version
For at least two releases, there haven't been multiple versions of API groups and we don't plan to support conversions in commands other than `kubectl convert`. This disconnects the `--output-version` option to be consistent with conversion agnostic command before it becomes an issue.
@kubernetes/sig-cli-pr-reviews @fabianofranz @smarterclayton
```release-note
`--output-version` is ignored for all commands except `kubectl convert`. This is consistent with the generic nature of `kubectl` CRUD commands and the previous removal of `--api-version`. Specific versions can be specified in the resource field: `resource.version.group`, `jobs.v1.batch`.
```
hot fix
add unit test and statefulSet
update example
remove package
change to ResourceNames
remove some code
remove strings
add fake testing func for AttachablePodForObject
minor change
add test.obj nil check
update testfile
gofmt
update
add fallthough
revert back
