Invoice Ninja Automatic Update Script v4.6.3

#!/bin/bash -ue
#Invoice Ninja Self-Hosted Automatic Update - USE AT YOUR OWN RISK
#This version will check https://invoiceninja.org for an updated version and install if found.
#Tested and works with cron. Lines 51, 54, & 79 output timestamps so you can pipe to a logfile.
#This does NOT backup the MySQL database. Use mysqldump if you would like to create a backup.
#Replace lines 14 and 58 with your specifics (omit <>), obviously.
#If using UPDATE_SECRET in the .env file, uncomment lines 64 & 83, and comment out line 84.
#!!IMPORTANT!! Be sure to edit lines 17 & 18 if www-data is not the owner/group for /ninja/storage!


#SET INITIAL VARIABLES
#Remaining variables will be set if an update is required
#--------------------------------------------------------
ninja_home="</path/to/ninja>"
ninja_storage="$ninja_home/storage"
versiontxt="$ninja_storage/version.txt"
storage_owner="www-data"
storage_group="www-data"


#GET INSTALLED AND CURRENT VERSION NUMBERS
#--------------------------------------------------------
ninja_installed=$(cat "$versiontxt")
ninja_current=$((wget -qO- https://invoiceninja.org/index.php) | (grep -oP 'Download Version \K[0-9]+\.[0-9]+(\.[0-9]+)'))


#SEE IF AN UPDATE IS REQUIRED
#--------------------------------------------------------
update_required="no"
set -f
array_ninja_installed=(${ninja_installed//./ })
array_ninja_current=(${ninja_current//./ })

if (( ${#array_ninja_installed[@]} == "2" ))
then
    array_ninja_installed+=("0")
fi

for ((i=0; i<${#array_ninja_installed[@]}; i++))
do
    if (( ${array_ninja_installed[$i]} < ${array_ninja_current[$i]} ))
    then
    update_required="yes"
    fi
done


#MAIN UPDATE SECTION
#--------------------------------------------------------
case $update_required in
    no)
    printf '%s - Invoice Ninja v%s is installed and is current. No update required.\n' "$(date)" "$ninja_installed"
    ;;
    yes)
    printf '\n%s - Updating Invoice Ninja from v%s to v%s.\n\n' "$(date)" "$ninja_installed" "$ninja_current"

    #Set remaining variables
    tempdir="</download/path>/InvoiceNinja"
    ninja_temp="$tempdir/ninja"
    ninja_file="ninja-v$ninja_current.zip"
    ninja_url="https://download.invoiceninja.com/$ninja_file"
    ninja_zip="$tempdir/$ninja_file"
    app_url="$(grep -oP '(?<=APP_URL=).*' "$ninja_home/.env")"
    #update_key="$(grep -oP '(?<=UPDATE_SECRET).*' "$ninja_home/.env")"

    printf 'Downloading Invoice Ninja v%s archive "%s" ...\n\n' "$ninja_current" "$ninja_url"
    wget -P "$tempdir/" "$ninja_url"

    printf 'Extracting to temporary folder "%s" ...\n\n' "$tempdir"
    unzip -q "$ninja_zip" -d "$tempdir/"

    printf 'Syncing to install folder "%s" ...\n' "$ninja_home"
    sudo rsync -tr --stats "$ninja_temp/" "$ninja_home/"

    printf '\nResetting permissions for "%s" ...\n\n' "$ninja_storage"
    sudo chown -R "$storage_owner":"$storage_group" "$ninja_storage/"
    sudo chmod -R 775 "$ninja_storage/"

    printf 'Removing downloaded ZIP file "%s" ...\n\nRemoving temporary folder "%s" ...\n\n' "$ninja_zip" "$tempdir"
    rm -rf "$tempdir/"

    printf 'Running update migration commands (%s/update)...\n\n' "$app_url"
    #wget -q --spider "$app_url/update?secret=$update_key"
    wget -q --spider "$app_url/update"

    printf '%s - Invoice Ninja successfully updated to v%s!\n\n' "$(date)" "$ninja_current"
    ;;
esac