Codegen script permission fix

Makefile

@@ -19,7 +19,8 @@ bootConfigSrc := $(shell find cmd/nats-boot-config/ pkg/bootconfig/ -name "*.go"
 # You might override this so as to use a more recent version, to update old
 # generated imports, and so migrate away from old import paths and get back to
 # a consistent import tree.
-codeGeneratorDir ?=
+CODEGEN_DIR := $(shell go list -m -f '{{.Dir}}' k8s.io/code-generator)
+CODEGEN_SCRIPT := $(CODEGEN_DIR)/generate-groups.sh
 
 default:
 	# Try these (read Makefile for more recipes):
@@ -29,7 +30,9 @@ default:
 
 pkg/jetstream/generated pkg/jetstream/apis/jetstream/v1beta2/zz_generated.deepcopy.go: fetch-modules $(jetstreamGenIn) pkg/k8scodegen/file-header.txt
 	rm -rf pkg/jetstream/generated
-	D="$(codeGeneratorDir)"; : "$${D:=`go list -m -f '{{.Dir}}' k8s.io/code-generator`}"; GOFLAGS='' bash "$$D/generate-groups.sh" all \
+	# Temporary fix until we migrate to kube_codegen.sh
+	chmod u+x "$(CODEGEN_DIR)/generate-internal-groups.sh"
+	GOFLAGS='' bash "$(CODEGEN_SCRIPT)" all \
 		github.com/nats-io/nack/pkg/jetstream/generated \
 		github.com/nats-io/nack/pkg/jetstream/apis \
 		"jetstream:v1beta2" \