build: upgrade codegen tooling to the latest version

This includes and is based on the changes of:

https://github.com/rook/rook/pull/14894

Co-authored-by: Blaine Gardner <b.blaine.gardner@gmail.com>
Co-authored-by: subhamkrai <srai@redhat.com>
Signed-off-by: Michael Adam <obnox@samba.org>

Fixes: #14894
(cherry picked from commit 9e725b6214)

build/codegen/codegen.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env -S bash -e
+#!/usr/bin/env bash
 
 # Copyright 2018 The Rook Authors. All rights reserved.
 #
@@ -14,29 +14,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-GROUP_VERSIONS="ceph.rook.io:v1"
+set -o errexit
+set -o nounset
+set -o pipefail
 
-scriptdir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-# CODE GENERATION
-# we run deepcopy and client,lister,informer generations separately so we can use the flag "--plural-exceptions"
-# which is only known by client,lister,informer binary and not the deepcopy binary
+base_dir="$(cd "${script_dir}/../.."  && pwd)"
 
-# run code deepcopy generation
-bash ${CODE_GENERATOR}/generate-groups.sh \
-    deepcopy \
-    github.com/rook/rook/pkg/client \
-    github.com/rook/rook/pkg/apis \
-    "${GROUP_VERSIONS}" \
-    --output-base "$(dirname "${BASH_SOURCE[0]}")/../../../../.." \
-    --go-header-file "${scriptdir}/boilerplate.go.txt"
+boilerplate="${base_dir}"/build/codegen/header.txt
 
-# run code client,lister,informer generation
-bash ${CODE_GENERATOR}/generate-groups.sh \
-    client,lister,informer \
-    github.com/rook/rook/pkg/client \
-    github.com/rook/rook/pkg/apis \
-    "${GROUP_VERSIONS}" \
-    --output-base "$(dirname "${BASH_SOURCE[0]}")/../../../../.." \
-    --go-header-file "${scriptdir}/boilerplate.go.txt" \
-    --plural-exceptions "CephNFS:CephNFSes" \
+source "${CODE_GENERATOR}/kube_codegen.sh"
+(
+  # because apis is a separate go module, code generation
+  # must be run from within the corresponding directory.
+  cd  ${base_dir}/pkg/apis
+
+  # run code deepcopy generation
+  kube::codegen::gen_helpers \
+      --boilerplate "${boilerplate}" \
+      "${base_dir}/pkg/apis" \
+  
+  # run code client,lister,informer generation
+  kube::codegen::gen_client \
+      --output-dir "${base_dir}/pkg/client" \
+      --output-pkg "github.com/rook/rook/pkg/client" \
+      --boilerplate "${boilerplate}" \
+      --plural-exceptions "CephNFS:CephNFSes" \
+      --with-watch \
+      "${base_dir}/pkg/apis"
+)