chart_single_check

#!/usr/bin/env bash
# SPDX-FileCopyrightText: 2018-present Open Networking Foundation <info@opennetworking.org>
#
# SPDX-License-Identifier: Apache-2.0

set -eu -o pipefail

modified_charts=$(git diff HEAD^ HEAD | grep Chart.yaml | grep -v /charts/ | grep +++ | cut -d " " -f2 | sed s^b/^^) || true

modified_component_charts=""
for chart in ${modified_charts}; do
    git diff HEAD^ HEAD ${chart}
    version=$(git diff HEAD^ HEAD ${chart} | grep +version: | cut -d " " -f2) || true
    if [ ! -z ${version} ]; then
        # figure out the tag for this chart
        component=`echo ${chart} | cut -d "/" -f1`
        modified_component_charts="${modified_component_charts} ${component}"
    fi
done

if [ "${modified_component_charts}" = "" ]; then
    echo No charts were modified
    exit 0
fi

count=$(wc -w <<<${modified_component_charts})
count=${count//[[:blank:]]/}
if (( ${count} != 1 )); then
    echo Found more than one modified chart: ${modified_component_charts}
    exit 1
fi

exit 0