From 7e256f1902a3b6993b8c248c9102c7b7bc71554f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Gaspar?=
 <46165813+ericgaspar@users.noreply.github.com>
Date: Wed, 1 Mar 2023 09:33:49 +0100
Subject: [PATCH] Update upgrade

---
 scripts/upgrade | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/scripts/upgrade b/scripts/upgrade
index b8481b4..6811224 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -27,30 +27,30 @@ ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 fi
 
 # If the admin is not defined, We can't upgrade this app
-if [ -z "$admin" ]; then
+if [ -z "${admin:-}" ]; then
 	ynh_die --message="This app can't be upgraded from a very old version of the package. Please remove and reinstall Moodle"
 fi
 
 # If the site_name is not defined
-if [ -z "$site_name" ]; then
+if [ -z "${site_name:-}" ]; then
 	site_name="YunoHost"
 	ynh_app_setting_set --app=$app --key=site_name --value=$site_name
 fi
 
 # If fpm_footprint doesn't exist, create it
-if [ -z "$fpm_footprint" ]; then
+if [ -z "${fpm_footprint:-}" ]; then
     fpm_footprint=low
     ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
 fi
 
 # If fpm_free_footprint doesn't exist, create it
-if [ -z "$fpm_free_footprint" ]; then
+if [ -z "${fpm_free_footprint:-}" ]; then
     fpm_free_footprint=0
     ynh_app_setting_set --app=$app --key=fpm_free_footprint --value=$fpm_free_footprint
 fi
 
 # If fpm_usage doesn't exist, create it
-if [ -z "$fpm_usage" ]; then
+if [ -z "${fpm_usage:-}" ]; then
     fpm_usage=low
     ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
 fi