kube-codegen: update tool to generate client-go libs

generate-internal-groups.sh and generate-groups.sh were deprecated and
then removed, replaced by kube::codegen::gen_client and
kube::codegen::gen_helpers.

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>

pkg/k8s/Makefile

@@ -21,26 +21,7 @@ generate:
 .PHONY: __do_generate
 __do_generate:
 	./tools/controller-gen crd paths=./apis/... output:dir=apis/cilium.io/client/crds/v1alpha1
-	chmod +x vendor/k8s.io/code-generator/generate-internal-groups.sh
-	# Do two invocations of generate-groups.sh, one with --plural-exceptions, one without
-	export GOPATH=$$(go env GOPATH); \
-	  bash vendor/k8s.io/code-generator/generate-groups.sh deepcopy,defaulter \
-	  github.com/cilium/tetragon/pkg/k8s/client \
-	  github.com/cilium/tetragon/pkg/k8s/apis \
-	  cilium.io:v1alpha1 \
-	  --go-header-file hack/custom-boilerplate.go.txt \
-	  -o . \
-	  --trim-path-prefix github.com/cilium/tetragon/pkg/k8s \
-	  ; \
-	  bash vendor/k8s.io/code-generator/generate-groups.sh lister,informer,client \
-	  github.com/cilium/tetragon/pkg/k8s/client \
-	  github.com/cilium/tetragon/pkg/k8s/apis \
-	  cilium.io:v1alpha1 \
-	  --go-header-file hack/custom-boilerplate.go.txt \
-	  -o . \
-	  --trim-path-prefix github.com/cilium/tetragon/pkg/k8s \
-	  --plural-exceptions TracingPolicyNamespaced:TracingPoliciesNamespaced \
-	  --plural-exceptions PodInfo:PodInfo \
+	./tools/k8s-code-gen.sh
 
 .PHONY: vendor
 vendor:

pkg/k8s/tools/k8s-code-gen.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+K8S_PKG="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)/.."
+CODEGEN_PKG=$K8S_PKG/vendor/k8s.io/code-generator
+
+source "${CODEGEN_PKG}/kube_codegen.sh"
+
+PLURAL_EXCEPTIONS="TracingPolicyNamespaced:TracingPoliciesNamespaced,PodInfo:PodInfo"
+
+kube::codegen::gen_client \
+    --with-watch \
+    --output-dir "${K8S_PKG}/client" \
+    --output-pkg "github.com/cilium/tetragon/pkg/k8s/client" \
+    --plural-exceptions ${PLURAL_EXCEPTIONS} \
+    --boilerplate "${K8S_PKG}/hack/custom-boilerplate.go.txt" \
+    "${K8S_PKG}/apis"
+
+kube::codegen::gen_helpers \
+    --boilerplate "${K8S_PKG}/hack/custom-boilerplate.go.txt" \
+    "${K8S_PKG}/apis"