Use codegen for type generation

Makefile

@@ -110,12 +110,9 @@ check: $(GOIMPORTS) $(GOLANGCI_LINT) $(MOCKGEN)
 	@REPO_ROOT=$(REPO_ROOT) bash $(GARDENER_HACK_DIR)/check-charts.sh ./charts
 
 .PHONY: generate
-generate: deepcopy-gen defaulter-gen conversion-gen $(CONTROLLER_GEN) $(HELM) $(MOCKGEN) $(YQ) $(VGOPATH)
+generate: $(CONTROLLER_GEN) $(HELM) $(MOCKGEN) $(YQ) $(VGOPATH)
 	@GOPATH=$(GOPATH) VGOPATH=$(VGOPATH) \
 	MOCKGEN=$(MOCKGEN) \
-	DEEPCOPY_GEN=$(DEEPCOPY_GEN) \
-	DEFAULTER_GEN=$(DEFAULTER_GEN) \
-	CONVERSION_GEN=$(CONVERSION_GEN) \
 	REPO_ROOT=$(REPO_ROOT) \
 	GARDENER_HACK_DIR=$(GARDENER_HACK_DIR) \
 	bash $(GARDENER_HACK_DIR)/generate-sequential.sh ./charts/... ./cmd/... ./example/... ./pkg/...
@@ -163,9 +160,6 @@ $(LOCALBIN):
 	mkdir -p $(LOCALBIN)
 
 ## Tool Binaries
-DEEPCOPY_GEN ?= $(LOCALBIN)/deepcopy-gen
-CONVERSION_GEN ?= $(LOCALBIN)/conversion-gen
-DEFAULTER_GEN ?= $(LOCALBIN)/defaulter-gen
 ENVTEST ?= $(LOCALBIN)/setup-envtest
 
 ## Tool Versions
@@ -178,18 +172,3 @@ ENVTEST_K8S_VERSION = 1.31.0
 envtest: $(ENVTEST) ## Download envtest-setup locally if necessary.
 $(ENVTEST): $(LOCALBIN)
 	test -s $(LOCALBIN)/setup-envtest || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
-
-.PHONY: deepcopy-gen
-deepcopy-gen: $(DEEPCOPY_GEN) ## Download deepcopy-gen locally if necessary.
-$(DEEPCOPY_GEN): $(LOCALBIN)
-	test -s $(LOCALBIN)/deepcopy-gen || GOBIN=$(LOCALBIN) go install k8s.io/code-generator/cmd/deepcopy-gen@$(CODE_GENERATOR_VERSION)
-
-.PHONY: defaulter-gen
-defaulter-gen: $(DEFAULTER_GEN) ## Download defaulter-gen locally if necessary.
-$(DEFAULTER_GEN): $(LOCALBIN)
-	test -s $(LOCALBIN)/defaulter-gen || GOBIN=$(LOCALBIN) go install k8s.io/code-generator/cmd/defaulter-gen@$(CODE_GENERATOR_VERSION)
-
-.PHONY: conversion-gen
-conversion-gen: $(CONVERSION_GEN) ## Download conversion-gen locally if necessary.
-$(CONVERSION_GEN): $(LOCALBIN)
-	test -s $(LOCALBIN)/conversion-gen || GOBIN=$(LOCALBIN) go install k8s.io/code-generator/cmd/conversion-gen@$(CODE_GENERATOR_VERSION)

hack/update-codegen.sh

@@ -1,86 +1,24 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
 set -o errexit
 set -o nounset
 set -o pipefail
 
-BASE_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
-export TERM="xterm-256color"
-
-VGOPATH="$VGOPATH"
-DEEPCOPY_GEN="$DEEPCOPY_GEN"
-DEFAULTER_GEN="$DEFAULTER_GEN"
-CONVERSION_GEN="$CONVERSION_GEN"
-
-bold="$(tput bold)"
-blue="$(tput setaf 4)"
-normal="$(tput sgr0)"
-
-function qualify-gvs() {
-  APIS_PKG="$1"
-  GROUPS_WITH_VERSIONS="$2"
-  join_char=""
-  res=""
-
-  for GVs in ${GROUPS_WITH_VERSIONS}; do
-    IFS=: read -r G Vs <<<"${GVs}"
-
-    for V in ${Vs//,/ }; do
-      res="$res$join_char$APIS_PKG/$G/$V"
-      join_char=","
-    done
-  done
-
-  echo "$res"
-}
-
-function qualify-gs() {
-  APIS_PKG="$1"
-  unset GROUPS
-  IFS=' ' read -ra GROUPS <<< "$2"
-  join_char=""
-  res=""
-
-  for G in "${GROUPS[@]}"; do
-    res="$res$join_char$APIS_PKG/$G"
-    join_char=","
-  done
-
-  echo "$res"
-}
-
 # setup virtual GOPATH
 source "$GARDENER_HACK_DIR"/vgopath-setup.sh
 
-# We need to explicitly pass GO111MODULE=off to k8s.io/code-generator as it is significantly slower otherwise,
-# see https://github.com/kubernetes/code-generator/issues/100.
-export GO111MODULE=off
-
-echo "${bold}Public types${normal}"
-
-echo "Generating ${blue}deepcopy${normal}"
-"$DEEPCOPY_GEN" \
-  --go-header-file "$BASE_DIR/boilerplate.go.txt" \
-  --input-dirs "$(qualify-gvs "github.com/ironcore-dev/gardener-extension-provider-metal/pkg/apis" "config:v1alpha1 metal:v1alpha1")" \
-  -O zz_generated.deepcopy
+CODE_GEN_DIR=$(go list -m -f '{{.Dir}}' k8s.io/code-generator)
+source "${CODE_GEN_DIR}/kube_codegen.sh"
 
-echo "${bold}Internal types${normal}"
+rm -f $GOPATH/bin/*-gen
 
-echo "Generating ${blue}deepcopy${normal}"
-"$DEEPCOPY_GEN" \
-  --go-header-file "$BASE_DIR/boilerplate.go.txt" \
-  --input-dirs "$(qualify-gs "github.com/ironcore-dev/gardener-extension-provider-metal/pkg/apis" "config metal")" \
-  -O zz_generated.deepcopy
+CURRENT_DIR=$(dirname $0)
+PROJECT_ROOT="${CURRENT_DIR}"/..
 
-echo "Generating ${blue}defaulter${normal}"
-"$DEFAULTER_GEN" \
-  --go-header-file "$BASE_DIR/boilerplate.go.txt" \
-  --input-dirs "$(qualify-gvs "github.com/ironcore-dev/gardener-extension-provider-metal/pkg/apis" "config:v1alpha1 metal:v1alpha1")" \
-  -O zz_generated.defaults
+kube::codegen::gen_helpers \
+  --boilerplate "${GARDENER_HACK_DIR}/LICENSE_BOILERPLATE.txt" \
+  "${PROJECT_ROOT}/pkg/apis/metal"
 
-echo "Generating ${blue}conversion${normal}"
-"$CONVERSION_GEN" \
-  --go-header-file "$BASE_DIR/boilerplate.go.txt" \
-  --input-dirs "$(qualify-gs "github.com/ironcore-dev/gardener-extension-provider-metal/pkg/apis" "config metal")" \
-  --input-dirs "$(qualify-gvs "github.com/ironcore-dev/gardener-extension-provider-metal/pkg/apis" "config:v1alpha1 metal:v1alpha1")" \
-  -O zz_generated.conversion
+kube::codegen::gen_helpers \
+  --boilerplate "${GARDENER_HACK_DIR}/LICENSE_BOILERPLATE.txt" \
+  "${PROJECT_ROOT}/pkg/apis/config"