# Contribution guidelines

So you want to hack on Istio? Yay! Please refer to Istio's overall
[contribution guidelines](https://github.com/istio/community/blob/master/CONTRIBUTING.md)

// used rather than just deleting the webhook since we want to keep it around after changing the default so user can later
// switch back to it. This is a hack but it is meant to cover a corner case where a user wants to migrate from a non-revisioned
// old version and then later decides to switch back to the old revision again.
func DeactivateIstioInjectionWebhook(ctx context.Context, client kubernetes.Interface) error {

type KubeOptions struct {
	Kubeconfig string
	Context    string
	Namespace  string
}

// Inherit the common kubernetes flags defined in the root package. This is a bit of a hack,
// but it allows us to directly get the final values for each of these flags without needing
// to pass pointers-to-flags through all of the (sub)commands.
func (o *KubeOptions) prepare(ctx cli.Context) {

# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.

# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.

# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.

func portForward(podName, namespace, flavor, urlFormat, localAddress string, remotePort int,
	client kube.CLIClient, writer io.Writer, browser bool,
) error {
	// port preference:
	// - If --listenPort is specified, use it
	// - without --listenPort, prefer the remotePort but fall back to a random port
	var portPrefs []int
	if listenPort != 0 {

		"-s", hostProbeSNAT.String(),
		"-p", "tcp",
		"-m", "tcp",
		"-j", "ACCEPT",
	)

	// CLI: -t NAT -A ISTIO_OUTPUT -d 169.254.7.127 -p tcp -m tcp -j ACCEPT
	//
	// DESC: Anything coming BACK from the pod healthcheck port with a dest of our SNAT-ed hostside IP
	// we also short-circuit.
	iptablesBuilder.AppendRule(
		iptableslog.UndefinedCommand, ChainInpodOutput, iptablesconstants.NAT,

  // on its own node object.
  // When Kubernetes does topology aware provisioning, it can use this list to
  // determine which labels it should retrieve from the node object and pass
  // back to the driver.
  // It is possible for different nodes to use different topology keys.
  // This can be empty if driver does not support topology.
  // +optional
  repeated string topologyKeys = 3;

     explicitly and finally terminates Your grants, and (b) on an ongoing basis,
     if such Contributor fails to notify You of the non-compliance by some
     reasonable means prior to 60 days after You have come back into compliance.
     Moreover, Your grants from a particular Contributor are reinstated on an
     ongoing basis if such Contributor notifies You of the non-compliance by