check_helm_chart

#!/bin/sh

## Exit code legend
# -2: Unknown error
# -1: Missing arguments
#  0: Success (chart matches or chart is new/uploaded)
#  1: Chart doesn't match

set -e  ## Exit on error

TMPDIR=$(mktemp -d)
if [ -z "$1" ]; then
    echo "Missing Arguments" >&2
    echo "Usage: $0 <path/to/chart> [--upload]"
    echo "Note: Order is important. If specified `--upload` MUST come after `path/to/chart`"
    exit -1
fi

CHARTDIR=$(realpath "$1")

cd ${TMPDIR}
helm dep up "${CHARTDIR}"
helm package "${CHARTDIR}"
LOCAL_PACKAGE=$(ls *.tgz | head -n1)
REMOTE_PACKAGE=${LOCAL_PACKAGE%%.tgz}.remote.tgz

RESULT=$(curl https://eccr.ecmwf.int/chartrepo/geoglows_api/charts/${LOCAL_PACKAGE} -so ${REMOTE_PACKAGE} -u ${ECCR_USER}:${ECCR_PASSWORD} -w '%{http_code}\n')
if [ ${RESULT} -eq  404 ]; then
    echo "Chart not found on remote" >&2
    if [[ "$2" == "--upload" ]]; then
        helm package ${CHARTDIR} --sign --key 'Aquaveo Chart Signing Key' --keyring ~/.gnupg/secring.gpg
        echo "Uploading chart..."
        curl -F "chart=@${LOCAL_PACKAGE}" -F "prov=@${LOCAL_PACKAGE}.prov" https://eccr.ecmwf.int/api/chartrepo/geoglows_api/charts -u ${ECCR_USER}:${ECCR_PASSWORD}
        echo -e "\nDone."
    fi
    exit 0
elif [ ${RESULT} -ne 200 ]; then
    echo "Unknown error while trying to retrieve chart from remote" >&2
    exit -2
fi
mkdir local remote
tar xf ${LOCAL_PACKAGE} -C local
tar xf ${REMOTE_PACKAGE} -C remote
for DIR in local remote; do
    rm -f ${DIR}/**/*.lock
done
set +e
diff -r local remote
RESULT=$?
if [ $RESULT -eq 1 ]; then
    echo "Chart contains changes, but the version number has not been updated!" >&2
    exit 1
else
    echo "No changes detected!"
fi
echo "Done."