Modernize code generation (#3003)

Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>

hack/update-codegen.sh

@@ -1,26 +1,67 @@
-#!/usr/bin/env bash
+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 set -o errexit
 set -o nounset
 set -o pipefail
 
-GENERATED_PACKAGE_ROOT="github.com"
-OPERATOR_PACKAGE_ROOT="${GENERATED_PACKAGE_ROOT}/zalando/postgres-operator"
-SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
-TARGET_CODE_DIR=${1-${SCRIPT_ROOT}/pkg}
-CODEGEN_PKG=${CODEGEN_PKG:-$(cd "${SCRIPT_ROOT}"; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo "${GOPATH}"/src/k8s.io/code-generator)}
+SRC="github.com"
+GOPKG="$SRC/zalando/postgres-operator"
+CUSTOM_RESOURCE_NAME_ZAL="zalando.org"
+CUSTOM_RESOURCE_NAME_ACID="acid.zalan.do"
+CUSTOM_RESOURCE_VERSION="v1"
 
-cleanup() {
-    rm -rf "${GENERATED_PACKAGE_ROOT}"
-}
-trap "cleanup" EXIT SIGINT
+SCRIPT_ROOT="$(dirname "${BASH_SOURCE[0]}")/.."
 
-bash "${CODEGEN_PKG}/generate-groups.sh" client,deepcopy,informer,lister \
-  "${OPERATOR_PACKAGE_ROOT}/pkg/generated" "${OPERATOR_PACKAGE_ROOT}/pkg/apis" \
-  "acid.zalan.do:v1 zalando.org:v1" \
-  --go-header-file "${SCRIPT_ROOT}"/hack/custom-boilerplate.go.txt \
-  -o ./
+OUTPUT_DIR="pkg/generated"
+OUTPUT_PKG="${GOPKG}/${OUTPUT_DIR}"
+APIS_PKG="${GOPKG}/pkg/apis"
+GROUPS_WITH_VERSIONS="${CUSTOM_RESOURCE_NAME_ZAL}:${CUSTOM_RESOURCE_VERSION},${CUSTOM_RESOURCE_NAME_ACID}:${CUSTOM_RESOURCE_VERSION}"
 
-cp -r "${OPERATOR_PACKAGE_ROOT}"/pkg/* "${TARGET_CODE_DIR}"
+echo "Generating deepcopy funcs"
+go tool deepcopy-gen \
+  --output-file zz_generated.deepcopy.go \
+  --bounding-dirs "${APIS_PKG}" \
+  --go-header-file "${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ZAL}/${CUSTOM_RESOURCE_VERSION}" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ACID}/${CUSTOM_RESOURCE_VERSION}"
 
-cleanup
+echo "Generating clientset for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}"
+go tool client-gen \
+  --clientset-name versioned \
+  --input-base "${APIS_PKG}" \
+  --input "${CUSTOM_RESOURCE_NAME_ZAL}/${CUSTOM_RESOURCE_VERSION},${CUSTOM_RESOURCE_NAME_ACID}/${CUSTOM_RESOURCE_VERSION}" \
+  --output-pkg "${OUTPUT_PKG}/clientset" \
+  --go-header-file "${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt" \
+  --output-dir "${OUTPUT_DIR}/clientset"
+
+echo "Generating listers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/listers"
+go tool lister-gen \
+  --output-pkg "${OUTPUT_PKG}/listers" \
+  --go-header-file "${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt" \
+  --output-dir "${OUTPUT_DIR}/listers" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ZAL}/${CUSTOM_RESOURCE_VERSION}" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ACID}/${CUSTOM_RESOURCE_VERSION}"
+
+echo "Generating informers for ${GROUPS_WITH_VERSIONS} at ${OUTPUT_PKG}/informers"
+go tool informer-gen \
+  --versioned-clientset-package "${OUTPUT_PKG}/${CLIENTSET_PKG_NAME:-clientset}/${CLIENTSET_NAME_VERSIONED:-versioned}" \
+  --listers-package "${OUTPUT_PKG}/listers" \
+  --output-pkg "${OUTPUT_PKG}/informers" \
+  --go-header-file "${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt" \
+  --output-dir "${OUTPUT_DIR}/informers" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ZAL}/${CUSTOM_RESOURCE_VERSION}" \
+  "${APIS_PKG}/${CUSTOM_RESOURCE_NAME_ACID}/${CUSTOM_RESOURCE_VERSION}"