For change proposals, see [Proposing Changes To Go](https://go.dev/s/proposal-process).

## Contributing code

Please read the [Contribution Guidelines](https://golang.org/doc/contribute.html) before sending patches.

Unless otherwise noted, the Go source files are distributed under

  Push your changes to a topic branch in your fork of the repository.
+ Make commits of logical units.
+ Respect the original code style: by using the same [codestyle][code-style],
  patches should only highlight the actual difference, not being disturbed by any formatting issues:
  + Only use spaces for indentation.
  + Create minimal diffs - disable on save actions like reformat source code or organize imports.

        // There are finer grained version requirements, but we don't need to worry about them here, as we use latest patch versions
        if (javaVersion.isCompatibleWith(JavaVersion.VERSION_1_9)) {
            // All latest patches of 2.13 work on Java 9+
            // 2.12 in theory supports it, but doesn't actually take it as a -target so we can't use it
            return VersionCoverage.versionsAtLeast(SCALA_2, "2.13.0")
        }

		Short: "Upgrade the kubelet configuration for this node",
		Long:  kubeletConfigLongDesc,
		Run:   runKubeletConfigPhase(),
		InheritFlags: []string{
			options.DryRun,
			options.KubeconfigPath,
			options.Patches,
		},
	}
	return phase
}

func runKubeletConfigPhase() func(c workflow.RunData) error {
	return func(c workflow.RunData) error {
		data, ok := c.(Data)
		if !ok {

		Run:   runControlPlane(),
		InheritFlags: []string{
			options.DryRun,
			options.KubeconfigPath,
			options.CertificateRenewal,
			options.EtcdUpgrade,
			options.Patches,
		},
	}
	return phase
}

func runControlPlane() func(c workflow.RunData) error {
	return func(c workflow.RunData) error {
		data, ok := c.(Data)
		if !ok {

		InheritFlags: getEtcdPhaseFlags(),
	}
	return phase
}

func getEtcdPhaseFlags() []string {
	flags := []string{
		options.CertificatesDir,
		options.CfgPath,
		options.ImageRepository,
		options.Patches,
		options.DryRun,
	}
	return flags
}

func runEtcdPhaseLocal() func(c workflow.RunData) error {
	return func(c workflow.RunData) error {
		data, ok := c.(InitData)
		if !ok {

			options.FileDiscovery,
			options.TokenDiscovery,
			options.TokenDiscoveryCAHash,
			options.TokenDiscoverySkipCAHash,
			options.TLSBootstrapToken,
			options.TokenStr,
			options.CertificateKey,
			options.Patches,
			options.DryRun,
		}
	case "download-certs":
		flags = []string{
			options.CfgPath,
			options.ControlPlane,
			options.FileDiscovery,
			options.TokenDiscovery,
			options.TokenDiscoveryCAHash,

	var (
		input          = []byte("bar: 0\nfoo: 0\n")
		patch          = []byte("bar: 1\n")
		expectedOutput = []byte("bar: 1\nfoo: 0\n")
	)

	dir, err := os.MkdirTemp("", "patches")
	if err != nil {
		t.Fatalf("could not create temp dir: %v", err)
	}
	defer os.RemoveAll(dir)

	if err := os.WriteFile(filepath.Join(dir, "kubeletconfiguration.yaml"), patch, 0644); err != nil {

	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/strategicpatch"
	clientset "k8s.io/client-go/kubernetes"
	podutil "k8s.io/kubernetes/pkg/api/v1/pod"
)

// PatchPodStatus patches pod status. It returns true and avoids an update if the patch contains no changes.

	return phase
}

func getControlPlanePhaseFlags(name string) []string {
	flags := []string{
		options.CfgPath,
		options.CertificatesDir,
		options.KubernetesVersion,
		options.ImageRepository,
		options.Patches,
		options.DryRun,
	}
	if name == "all" || name == kubeadmconstants.KubeAPIServer {
		flags = append(flags,
			options.APIServerAdvertiseAddress,
			options.ControlPlaneEndpoint,
			options.APIServerBindPort,