return netlink.LinkByIndex(linkIndex)
}

// getPodNetNs finds the network namespace for a given pod. There is not a great way to do this. Network namespaces live
// under the procfs, /proc/<pid>/ns/net. In majority of cases, this is not used directly, but is rather bind mounted to
// /var/run/netns/<name>. However, this pattern is not ubiquitous. Some platforms bind mount to other places. As we run

tidy-go:
	@find -name go.mod -execdir go mod tidy \;

mod-download-go:
	@-GOFLAGS="-mod=readonly" find -name go.mod -execdir go mod download \;
# go mod tidy is needed with Golang 1.16+ as go mod download affects go.sum
# https://github.com/golang/go/issues/43994
	@find -name go.mod -execdir go mod tidy \;

format-go: tidy-go

		if !strings.EqualFold(workload.Namespace, wf.Namespace) {
			return false
		}
	}

	if wf.Address != "" {
		var find bool
		for _, ip := range workload.WorkloadIPs {
			if strings.EqualFold(ip, wf.Address) {
				find = true
				break
			}
		}
		if !find {
			return false
		}
	}
	if wf.Node != "" && !strings.EqualFold(workload.Node, wf.Node) {
		return false
	}
	return true
}

	})
	if err != nil {
		panic(err)
	}
	defer podUIDNetns.Close()

	if len(podUIDNetns) == 0 {
		t.Fatal("expected to find pod netns")
	}

	expectedUID := "863b91d4-4b68-4efa-917f-4b560e3e86aa"
	if podUIDNetns[expectedUID] == (WorkloadInfo{}) {
		t.Fatal("expected to find pod netns under pod uid")
	}
}

// copied and modified from spire

func TestGetContainerIDFromCGroups(t *testing.T) {

		istiodDump := &configdump.Wrapper{}
		err := json.Unmarshal(resp, istiodDump)
		if err != nil {
			continue
		}
		c.istiod = istiodDump
		break
	}
	if c.istiod == nil {
		return nil, fmt.Errorf("unable to find config dump in Istiod responses")
	}
	envoyDump := &configdump.Wrapper{}
	err := json.Unmarshal(envoyResponse, envoyDump)
	if err != nil {
		return nil, err
	}
	c.envoy = envoyDump
	c.w = w
	c.context = 7

	}))

	return s
}

func (s *InformerHandlers) GetPodIfAmbient(podName, podNamespace string) (*corev1.Pod, error) {
	ns := s.namespaces.Get(podNamespace, "")
	if ns == nil {
		return nil, fmt.Errorf("failed to find namespace %v", ns)
	}
	pod := s.pods.Get(podName, podNamespace)
	if util.PodRedirectionEnabled(ns, pod) {
		return pod, nil
	}
	return nil, nil
}

func (s *InformerHandlers) Start() {

}

func forEachLoopbackRoute(cfg *Config, f func(*netlink.Route) error) error {
	loopbackLink, err := netlink.LinkByName("lo")
	if err != nil {
		return fmt.Errorf("failed to find 'lo' link: %v", err)
	}

	// Set up netlink routes for localhost
	cidrs := []string{"0.0.0.0/0"}
	if cfg.EnableIPv6 {
		cidrs = append(cidrs, "0::0/0")
	}
	for _, fullCIDR := range cidrs {

    PATCH_OUT="${ARTIFACTS}/${PATCH_NAME}"
    git diff > "${PATCH_OUT}"

    [ -n "${JOB_NAME}" ] && [ -n "${BUILD_ID}" ]
    IN_PROW="$?"

    # Don't persist large diffs (30M+) on CI
    LARGE_FILE="$(find "${ARTIFACTS}" -name "${PATCH_NAME}" -type 'f' -size +30M)"
    if [ "${IN_PROW}" -eq 0 ] && [ -n "${LARGE_FILE}" ]; then
      rm "${PATCH_OUT}"
      echo "WARNING: patch file was too large to persist ($(du -h "${PATCH_OUT}"))"

	// Pod is referred to using something like "deployment/httpbin".  Use the kubectl
	// libraries to look up the resource name, find the pods it selects, and return
	// one of those pods.
	builder := factory.NewBuilder().
		WithScheme(kubelib.IstioScheme, kubelib.IstioScheme.PrioritizedVersionsAllGroups()...).
		NamespaceParam(ns).DefaultNamespace().

				returnErr = fmt.Errorf("can not dump ROOTCA from secret: %v", err)
			} else {
				returnStr = strCA
				returnErr = nil
			}
			return returnStr, returnErr
		}
	}
	return "", fmt.Errorf("can not find ROOTCA from secret")
}

func (c *ConfigWriter) getIstioVersionInfo(bootstrapDump *adminv3.BootstrapConfigDump) (version, sha string) {
	const (
		istioVersionKey  = "ISTIO_VERSION"