Apply Builders for client-go's typed client

[jpbetz]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR is the first step toward implementing Apply for client-go's typed client

umbrella issue: kubernetes/enhancements#2155

Special notes for your reviewer:

Generated code is in a separate commit.

Example usage:

deployment := appsv1ac.Deployment("nginx-deployment-3", "default").
	WithSpec(appsv1ac.DeploymentSpec().
		WithSelector(metav1ac.LabelSelector().
			WithMatchLabels(map[string]string{"app": "nginx"}),
		).
		WithTemplate(corev1ac.PodTemplateSpec().
			WithLabels(map[string]string{"app": "nginx"}).
			WithSpec(corev1ac.PodSpec().
				WithContainers(
					corev1ac.Container().
						WithName("nginx").
						WithImage("nginx:1.14.2").
						WithStdin(true).
						WithPorts(
							corev1ac.ContainerPort().
								WithContainerPort(8080).
								WithProtocol(v1.ProtocolTCP),
						).
						WithResources(corev1ac.ResourceRequirements().
							WithLimits(v1.ResourceList{
								v1.ResourceCPU:    resource.MustParse("4"),
								v1.ResourceMemory: resource.MustParse("32Gi"),
							}),
						),
				),
			),
		),
	)

client.AppsV1().Deployments("default").Apply(context.TODO(), deployment, metav1.ApplyOptions{FieldManager: "test-mgr", Force: true})

Does this PR introduce a user-facing change?:

Release note will be added when all the last change in the umbrella issue is merged

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

• [KEP]: KEP 2155

TODO

/sig api-machinery
/wg api-expression

[jpbetz]

/triage accepted
/priority important-soon
/cc @apelisse @Jefftree @kevindelgado

[k8s-ci-robot]

@jpbetz: GitHub didn't allow me to request PR reviews from the following users: kevindelgado.

Note that only kubernetes members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

/triage accepted
/priority important-soon
/cc @apelisse @Jefftree @kevindelgado

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[apelisse]

Looked at a few generated types, it looks good in general, I'm just trying to understand some decisions (probably because I don't have enough context of the implementation details).

[fejta-bot]

/retest
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Review the full test history for this PR.

Silence the bot with an /lgtm cancel or /hold comment for consistent failures.

[dims]

/hold

[dims]

/hold cancel
/retest

[dims]

/hold

[dims]

/hold cancel

[jpbetz]

Rebased and fix a corner case we found when implementing extract-- non-inlined embeds must be nill-able. Some details at: https://gist.github.com/jpbetz/a5a3a8dd0f12641e8546a9c1a525ea3f

[lavalamp]

/lgtm

[jpbetz]

Rebased and reran generator to pick up added NamespaceSelector in PodAffinityTerm.

[k8s-ci-robot]

@jpbetz: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-kubernetes-e2e-aks-engine-azure	86184be	link	/test pull-kubernetes-e2e-aks-engine-azure
pull-kubernetes-e2e-azure-disk-windows	86184be	link	/test pull-kubernetes-e2e-azure-disk-windows

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[lavalamp]

/lgtm