Nextcloud Core Update Checker and Apps Updater

nextcloud-update-check

#!/bin/env ash
# shellcheck shell=dash
#
# Check Nextcloud core for available updates.
# * Update all Nextcloud apps to their latest available versions.
# * Notify if core update is available or any apps have been updated.
# * Stay silent otherwise (for cron-jobs or scheduled tasks).
# * Runs on standard Linux (Ubuntu, etc.), as well as Synology NAS DSM (if you get your settings right).
# * Works with different instances with dedicated Linux user profiles.
#
# See https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/occ_command.html
#

# --------------------------------------------------
# Configuration Settings
# --------------------------------------------------

# Installed Nextcloud instances
_NEXTCLOUD_DIRS="
    /var/services/web/nextcloud
    /var/www/example.net/nextcloud
    /var/www/example.org/nextcloud
    /var/www/example.com/nextcloud
"

# Ensure PHP version of web-server matches
_PHP_CLI="/usr/local/bin/php74"

# Recomended PHP.INI options
_PHP_OPTIONS="
    memory_limit=-1
    extension_dir=/volume1/@appstore/PHP7.4/usr/local/lib/php74/modules
    extension=apcu.so
    apc.enable_cli=1
    opcache.enable_cli=1"

# Abort on any error on unset variable
set -e -u

_php_cmd_opts=""
for _php_option in $_PHP_OPTIONS; do
    _php_cmd_opts="$_php_cmd_opts --define $_php_option"
done

for _nc_dir in $_NEXTCLOUD_DIRS; do

    # Get the Linux system user who owns this Nextcloud instance
    _nextcloud_owner=$(stat -c '%U' "$_nc_dir")

    cd "$_nc_dir" || exit

    _occ_cmd="sudo -u $_nextcloud_owner  $_PHP_CLI $_php_cmd_opts -f ./occ --"

    # Update any app, regardeless
    _occ_app_result=$( $_occ_cmd --no-ansi app:update --all )

    # Check for Nextcloud core and apps updates
    _occ_core_result=$( $_occ_cmd --no-ansi update:check )

    if [ "$_occ_core_result" != "Everything up to date" ] || [ -n "$_occ_app_result" ]; then
        echo "Updates for $(basename "$( dirname "$_nc_dir" )" ):"
        echo "$_occ_core_result\n"
        echo "$_occ_app_result\n"
    fi
done