docker-nextcloudclient/start.sh

#!/bin/bash

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

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

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