#!/bin/bash

# Copyright 2016 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 pipefail
set -o nounset

if [[ -z "${KUBE_ROOT:-}" ]]; then
	KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
fi

source "${KUBE_ROOT}/cluster/lib/logging.sh"

if [[ ! -d "${KUBE_ROOT}/examples" ]]; then
	echo "${KUBE_ROOT}/examples not detected.  This script should be run from a location where the source dirs are available."
	exit 1
fi

if ! which go-bindata &>/dev/null ; then
	echo "Cannot find go-bindata. Install with"
	echo "  go get -u github.com/jteeuwen/go-bindata/go-bindata"
	echo "  and make sure GOBIN is in the system PATH"
	exit 5
fi

BINDATA_OUTPUT="${KUBE_ROOT}/test/e2e/generated/bindata.go"
go-bindata -nometadata -prefix "${KUBE_ROOT}" -o "${BINDATA_OUTPUT}.tmp" -pkg generated \
	-ignore .jpg -ignore .png -ignore .md \
	"${KUBE_ROOT}/examples/..." \
	"${KUBE_ROOT}/test/e2e/testing-manifests/..." \
	"${KUBE_ROOT}/test/images/..." \
	"${KUBE_ROOT}/test/fixtures/..."

gofmt -s -w "${BINDATA_OUTPUT}.tmp"

# Here we compare and overwrite only if different to avoid updating the
# timestamp and triggering a rebuild. The 'cat' redirect trick to preserve file
# permissions of the target file.
if ! cmp -s "${BINDATA_OUTPUT}.tmp" "${BINDATA_OUTPUT}" ; then
	cat "${BINDATA_OUTPUT}.tmp" > "${BINDATA_OUTPUT}"
	V=2 kube::log::info "Generated bindata file : ${BINDATA_OUTPUT} has $(wc -l ${BINDATA_OUTPUT}) lines of lovely automated artifacts"
else
	V=2 kube::log::info "No changes in generated bindata file: ${BINDATA_OUTPUT}"
fi

rm -f "${BINDATA_OUTPUT}.tmp"