diff --git a/scripts/.fonctions b/scripts/.fonctions
index 961bcd7..5268a86 100644
--- a/scripts/.fonctions
+++ b/scripts/.fonctions
@@ -169,3 +169,48 @@ REMOVE_SYS_USER () {   # Delete user
     	sudo userdel $app
     fi
 }
+
+#=================================================
+# BACKUP
+#=================================================
+
+BACKUP_FAIL_UPGRADE () {
+	WARNING echo "Upgrade failed."
+	app_bck=${app//_/-}	# Replace all '_' by '-'
+	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$backup_number; then	# Vérifie l'existence de l'archive avant de supprimer l'application et de restaurer
+		sudo yunohost app remove $app	# Supprime l'application avant de la restaurer.
+		sudo yunohost backup restore --ignore-hooks $app_bck-pre-upgrade$backup_number --apps $app --force	# Restore the backup if upgrade failed
+		ynh_die "The app was restored to the way it was before the failed upgrade."
+	fi
+}
+
+BACKUP_BEFORE_UPGRADE () {	# Backup the current version of the app, restore it if the upgrade fails
+	backup_number=1
+	old_backup_number=2
+	app_bck=${app//_/-}	# Replace all '_' by '-'
+	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade1; then	# Vérifie l'existence d'une archive déjà numéroté à 1.
+		backup_number=2	# Et passe le numéro de l'archive à 2
+		old_backup_number=1
+	fi
+
+	sudo yunohost backup create --ignore-hooks --apps $app --name $app_bck-pre-upgrade$backup_number	# Créer un backup différent de celui existant.
+	if [ "$?" -eq 0 ]; then	# Si le backup est un succès, supprime l'archive précédente.
+		if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$old_backup_number; then	# Vérifie l'existence de l'ancienne archive avant de la supprimer, pour éviter une erreur.
+			QUIET sudo yunohost backup delete $app_bck-pre-upgrade$old_backup_number
+		fi
+	else	# Si le backup a échoué
+		ynh_die "Backup failed, the upgrade process was aborted."
+	fi
+}
+
+
+# Exit if an error occurs during the execution of the script.
+#
+# Stop immediatly the execution if an error occured or if a empty variable is used.
+# The execution of the script is derivate to ynh_exit_properly function before exit.
+#
+# Usage: ynh_abort_if_errors
+ynh_abort_if_errors () {
+	set -eu	# Exit if a command fail, and if a variable is used unset.
+	trap ynh_exit_properly EXIT	# Capturing exit signals on shell script
+}
diff --git a/scripts/upgrade b/scripts/upgrade
index e05b4f9..7c55d10 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,43 +1,146 @@
 #!/bin/bash
 
-# Exit on command errors and treat unset variables as an error
 set -eu
 
-source .fonctions	# Loads the generic functions usually used in the script
-source /usr/share/yunohost/helpers # Source YunoHost helpers
+#=================================================
+# GENERIC STARTING
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
+
+source .fonctions
+source /usr/share/yunohost/helpers
+
+#=================================================
+# LOAD SETTINGS
+#=================================================
 
-# See comments in install script
 app=$YNH_APP_INSTANCE_NAME
 
-# Retrieve app settings
 domain=$(ynh_app_setting_get $app domain)
 path=$(ynh_app_setting_get $app path)
 is_public=$(ynh_app_setting_get $app is_public)
+port=$(ynh_app_setting_get $app port)
+final_path=$(ynh_app_setting_get $app final_path)
+secret=$(ynh_app_setting_get $app secret)
+
+#=================================================
+# FIX OLD THINGS
+#=================================================
+
+if [ "$is_public" = "Yes" ]; then
+	ynh_app_setting_set $app is_public 1	# Fixe is_public en booléen
+	is_public=1
+elif [ "$is_public" = "No" ]; then
+	ynh_app_setting_set $app is_public 0
+	is_public=0
+fi
+
+if [ "${#final_path}" -eq 0 ]
+then	# Si final_path n'est pas renseigné dans la config yunohost, cas d'ancien script, code final_path en dur
+	final_path=/var/www/$app
+fi
+
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+
+BACKUP_BEFORE_UPGRADE	# Backup the current version of the app
+ynh_clean_setup () {
+	BACKUP_FAIL_UPGRADE	# restore it if the upgrade fails
+}
+ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.
+
 
 CHECK_PATH	# Checks and corrects the syntax of the path.
 
-final_path=/var/www/$app
-
 # Get source
 SETUP_SOURCE
 
+#=================================================
+# NGINX CONFIGURATION
+#=================================================
+
+# Et copie le fichier de config nginx
+sudo cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf
 # Modify Nginx configuration file and copy it to Nginx conf directory
-sudo sed -i "s@__PATHTOCHANGE__@$path@g" /etc/nginx/conf.d/$domain.d/$app.conf
-sudo sed -i "s@__FINALPATH__@$final_path@g" /etc/nginx/conf.d/$domain.d/$app.conf
-sudo sed -i "s@__NAMETOCHANGE__@$app@g" /etc/nginx/conf.d/$domain.d/$app.conf
+sudo sed -i "s@__PATH__@$path@g" /etc/nginx/conf.d/$domain.d/$app.conf
+sudo sed -i "s@__PORT__@$port@g" /etc/nginx/conf.d/$domain.d/$app.conf
+
 
 if [ "$is_public" = "Yes" ];
 then
 	sudo sed -i "s@#--PRIVATE--@@g" /etc/nginx/conf.d/$domain.d/$app.conf
 fi
 
-# Setup SSOwat
-ynh_app_setting_set "$app" is_public "$is_public"
-if [ "$is_public" = "Yes" ];
-then
-  ynh_app_setting_set "$app" unprotected_uris "/"
+#=================================================
+# SPECIFIC UPGRADE
+#=================================================
+# SETUP LUFI
+#=================================================
+
+## Copie et configuration du fichier de conf.
+CHECK_MD5_CONFIG "lufi.conf" "$final_path/lufi.conf"	# Créé un backup du fichier de config si il a été modifié.
+sudo cp ../conf/lufi.conf.template "$final_path/lufi.conf"
+sudo sed -i "s@__DOMAIN__@$domain@g" "$final_path/lufi.conf"
+sudo sed -i "s@__PATH__@$path_url@g" "$final_path/lufi.conf"
+sudo sed -i "s@__PORT__@$port@g" "$final_path/lufi.conf"
+sudo sed -i "s@__SECRET__@$secret@g" "${final_path}/lufi.conf"
+STORE_MD5_CONFIG "lufi.conf" "$final_path/lufi.conf"	# Réenregistre la somme de contrôle du fichier de config
+
+#=================================================
+# SETUP SYSTEMD
+#=================================================
+
+# Mise en place du script systemd
+sudo systemctl stop $app
+sudo cp ../conf/lufi.service /etc/systemd/system/$app.service
+sudo chown root: /etc/systemd/system/$app.service
+sudo sed -i "s@__FINALPATH__@$final_path/@g" /etc/systemd/system/$app.service
+sudo sed -i "s@__APP__@$app@g" /etc/systemd/system/$app.service
+## Démarrage auto du service
+sudo systemctl enable $app
+
+#=================================================
+# SETUP CRON
+#=================================================
+
+sudo cp ../conf/cron_lufi /etc/cron.d/$app
+sudo sed -i "s@__FINALPATH__@$final_path/@g" /etc/cron.d/$app
+
+#=================================================
+# UPDATE LUFI WITH CARTON
+#=================================================
+
+pushd $final_path	# cd avec une stack pour revenir en arrière
+sudo carton install 2>&1 | sudo tee -a "/var/log/$app/setup_carton.log"
+popd	# Revient au dossier courant avant pushd
+
+#=================================================
+# SECURING FILES AND DIRECTORIES
+#=================================================
+
+sudo chown -R $app: $final_path
+
+#=================================================
+# RESTART LUFI
+#=================================================
+
+sudo systemctl restart lufi
+
+#=================================================
+# SETUP SSOWAT
+#=================================================
+
+ynh_app_setting_set $app skipped_uris "/"
+if [ $is_public -eq 0 ]
+then	
+	ynh_app_setting_set "$app" unprotected_uris "/"
 fi
 
-# Reload Nginx
+#=================================================
+# RELOAD NGINX
+#=================================================
+
 sudo systemctl reload nginx
-sudo yunohost app ssowatconf
\ No newline at end of file
+sudo yunohost app ssowatconf