#!/usr/bin/env 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

SCRIPT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
DIFFROOT="${SCRIPT_ROOT}/pkg"
TMP_DIFFROOT="$(mktemp -d -t "$(basename "$0").XXXXXX")/pkg"

cleanup() {
  rm -rf "${TMP_DIFFROOT}"
}
trap "cleanup" EXIT SIGINT

cleanup

# Ensure model-schema generator matches the version from
# k8s.io/kubernetes/pkg/generated/openapi/cmd/models-schema/main.go
echo "Ensuring models-schema is up-to-date"
K8S_MODELS_SCHEMA="${SCRIPT_ROOT}/../../../../pkg/generated/openapi/cmd/models-schema/main.go"
SAMPLE_CONTROLLER_MODELS_SCHEMA="${SCRIPT_ROOT}/pkg/generated/openapi/cmd/models-schema/main.go"
# these two files will only differ in the imported lines for generated openapi
if ! diff -I "k8s.io/kubernetes/pkg/generated/openapi" \
  -I "k8s.io/sample-controller/pkg/generated/openapi" \
  "${K8S_MODELS_SCHEMA}" "${SAMPLE_CONTROLLER_MODELS_SCHEMA}"; then
  echo "${SAMPLE_CONTROLLER_MODELS_SCHEMA} is out of date. Compare changes with ${K8S_MODELS_SCHEMA}"
  exit 1
fi

mkdir -p "${TMP_DIFFROOT}"
cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"

"${SCRIPT_ROOT}/hack/update-codegen.sh"
echo "diffing ${DIFFROOT} against freshly generated codegen"
ret=0
diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
if [[ $ret -eq 0 ]]; then
  echo "${DIFFROOT} up to date."
else
  echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
fi
exit $ret