This makes it a little easier to look at the main Makefile without getting
overwhelmed by code-generation stuff.

This is sort of gravy.  There's no good way to do this for arbitrary
directories because of the way Make works (we'd have to declare them all
PHONY).

If people hate using make directly we could wrap it in another level of
indirection, but I didn't yet.  E.g.

  build/make-all.sh -> make -> make-rules/all.sh -> go install

This would insulate people from 'make' atthe cost of custom build tools.  I
prefer being able to say 'make' and having it just work.

This makes code generation MUCH MUCH faster.

Just a naming nit that was too hard to fixup-and-rebase.

This forces a regeneration if the generation tools are rebuilt.

Also clean up Makefile a bit.

This should only rebuild when ACTUALLY needed.

Default SHELL and some other variables for max correctness.

Conversion is now generated by Makefile, on demand, rather than all at once.
Manually verified no net change in generated code.

Easier to clean up the mess when needed.

This mostly takes the previously checked in files and removes them, and moves
the generation to be on-demand instead of manual.  Manually verified no change
in generated output.

This makes followup commits easier wrt finding binaries during build.

This allows us to start building real dependencies into Makefile.

Leave old hack/* scripts in place but advise to use 'make'.  There are a few
rules that call things like 'go run' or 'build/*' that I left as-is for now.

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Deepcopy: avoid struct copies and reflection Call

- make signature of generated deepcopy methods symmetric with `in *type, out *type`, avoiding copies of big structs on the stack
- switch to `in interface{}, out interface{}` which allows us to call them with without `reflect.Call`

The first change reduces runtime of BenchmarkPodCopy-4 from `> 3500ns` to around `2300ns`.

The second change reduces runtime to around `1900ns`.

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Fix kubectl run to print object on dry run

Originally Authored By tnachen in PR:
https://github.com/kubernetes/kubernetes/pull/25842

Fixes #19636

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controller: wait for synced old replica sets on Recreate

Partially fixes https://github.com/kubernetes/kubernetes/issues/27362

Any other work on it should be handled in the replica set level (and/or kubelet if it's required)

@kubernetes/deployment PTAL

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Fix some errors in the e2e doc and make it more consistent


- "--tests" is not a valid argument
- use --ginko-skip to exclude (not focus)
- add "--check_node_count=false" to test against local cluster
- always use "--" for long args (there was a mix of "-" and "--" and it was a bit confusing)

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Add development doc with go tips & tools

Encourage knowledge sharing among Kubernetes developers!

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node_e2e: configure gce images via config file

This file provides the abiliy to specify image project on a per-image
basis and is more extensible for future changes.

For backwards compatibility and local development convenience, the
existing flags are kept and should work.

The eventual goal is to be able to source some images, such as the CoreOS one (and possibly containervm one) from their upstream projects and do all new configuration changes via a cloud-init key added to the image config.

This PR is a first step there. A following PR will add a config key of `cloud-init` or `user-data` and migrate the CoreOS e2e to use that.

This motivation is driven by the fact that currently the changes needed for the CoreOS image can all be done quickly in cloud-init and this will make it much easier to update the image and ensure that changes are applied consistently.

/cc @timstclair @vishh @yifan-gu @pwittrock 

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Add --quiet to hide the 'waiting for pods to be running' message in kubectl run

Ref #28695  

@kubernetes/kubectl 

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Change route controller to use patch to set node condition.

Change the route controller to use `PatchStatus` function in `NodeExpansion` to update node condition.
@caesarxuchao 

/cc @wojtek-t 


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rbac authorizer: cleanups to rule evaluation for non-resource URLs

An few oversights in the RBAC authorizer. Fixes #28291 and permits non-resource URLs to use stars in the path. E.g. ("/apis/*").

cc @liggitt @kubernetes/sig-auth 

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fix image staging to non gcr.io repos

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Node E2E: Prep for continuous Docker validation node e2e test

Based on https://github.com/kubernetes/kubernetes/pull/28516, for https://github.com/kubernetes/kubernetes/issues/25215.

https://github.com/kubernetes/kubernetes/pull/26813 added support to run e2e test on gci preview image and newest docker version.
This PR added the same support to node e2e test.

The main dependencies of node e2e test are `docker`, `kubelet`, `etcd` and `apiserver`.
Currently, node e2e test builds `kubelet` and `apiserver` locally, and copies them into `/tmp` directory in VM instance. GCI also has built-in `docker`. So the only dependency missing is `etcd`.

This PR injected a simple cloud-init script when creating instance to install `etcd` during node startup.

@andyzheng0831 for the cloud init script.
@wonderfly for the gci instance setup.
@pwittrock for the node e2e test change.

/cc @dchen1107 

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Add known versions to release 1.4 clientset.

These imports install the API groups and register them with the API machinery. The release_1_4 clientset cannot be used without these imports. 

Follow up for PR #26588

@kubernetes/sig-api-machinery


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kubectl: make --container-port actually work for expose

Even if it was recently deprecated, it should work as expected.

@kubernetes/kubectl 

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Controllers doesn't take any actions when being deleted.

I started doing it for other controllers but it's not always clear to me how it should work. I'll be adding other ones as separate commits to this PR.

cc @caesarxuchao @lavalamp