docker-nextcloudclient/start.sh

#!/bin/sh

USER_NAME=${USER_NAME:-nextcloudclient}
USER_GROUP=${USER_GROUP:-nextcloudgroup}
USER_UID=${USER_UID:-1000}
USER_GID=${USER_GID:-1000}
NEXTCLOUD_USERNAME=${NEXTCLOUD_USERNAME:-username}
NEXTCLOUD_PASSWORD=${NEXTCLOUD_PASSWORD:-password}
NEXTCLOUD_URL=${NEXTCLOUD_URL:-https://nextcloud.example.com}
NEXTCLOUD_DIR=${NEXTCLOUD_DIR:-/data}
NEXTCLOUD_DIR_CHOWN=${NEXTCLOUD_DIR_CHOWN:-1}
NEXTCLOUD_SLEEP=${NEXTCLOUD_SLEEP:-30}

# check if group already exists
GRP_NAME=$(getent group ${USER_GID} )
if [ "${GRP_NAME}" ] ; then
	USER_GROUP=$( echo ${GRP_NAME} | sed 's/\:.*//' )
else
	# if not, we create the group
	addgroup -g ${USER_GID} ${USER_GROUP}
fi

# check if user already exists
USR_NAME=$(getent passwd ${USER_UID} )
if [ "${USR_NAME}" ] ; then
	USER_NAME=$( echo ${USR_NAME} | sed 's/\:.*//' )
else
	# if not, we create the user
	adduser -s /bin/false -D -H -G ${USER_GROUP} -u ${USER_UID} ${USER_NAME}
fi

# create dir if not exists (it should exist if you mapped it outside the container)
if [ ! -d "${NEXTCLOUD_DIR}" ] ; then
	mkdir -p "${NEXTCLOUD_DIR}"
fi

# replace data directory permissions
if [ "${NEXTCLOUD_DIR_CHOWN}" = "1" ] ; then
	chown -R ${USER_UID}:${USER_GID} "${NEXTCLOUD_DIR}"
fi

PARAMS=
if [ "${NEXTCLOUD_FORCE_TRUST}" = "1" ] ; then
	PARAMS="${PARAMS} --trust"
fi
if [ ! "${NEXTCLOUD_HTTPPROXY}" = "" ] ; then
	PARAMS="${PARAMS} --httpproxy '${NEXTCLOUD_HTTPPROXY}'"
fi
if [ ! "${NEXTCLOUD_UPLIMIT}" = "" ] ; then
	PARAMS="${PARAMS} --uplimit '${NEXTCLOUD_UPLIMIT}'"
fi
if [ ! "${NEXTCLOUD_DOWNLIMIT}" = "" ] ; then
	PARAMS="${PARAMS} --downlimit '${NEXTCLOUD_DOWNLIMIT}'"
fi
if [ ! "${NEXTCLOUD_EXCLUDEFILE}" = "" ] ; then
	if [ -r "${NEXTCLOUD_EXCLUDEFILE}" ] ; then
		PARAMS="${PARAMS} --exclude '${NEXTCLOUD_EXCLUDEFILE}'"
	fi
fi
if [ ! "${NEXTCLOUD_UNSYNCFILE}" = "" ] ; then
	if [ -r "${NEXTCLOUD_UNSYNCFILE}" ] ; then
		PARAMS="${PARAMS} --unsyncedfolders '${NEXTCLOUD_UNSYNCFILE}'"
	fi
fi
if [ "${NEXTCLOUD_SILENT}" = "1" ] ; then
	PARAMS="${PARAMS} --silent"
fi

PARAMS="${PARAMS} --non-interactive -u ${NEXTCLOUD_USERNAME} -p ${NEXTCLOUD_PASSWORD} ${NEXTCLOUD_DIR} ${NEXTCLOUD_URL}"

# main loop
while true; do
	/bin/su -s /bin/sh ${USER_NAME} -c "/usr/bin/nextcloudcmd ${PARAMS}"
	sleep ${NEXTCLOUD_SLEEP}
done