better way to detect fpm version

scripts/backup

@@ -10,16 +10,6 @@
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-current_version=$(yunohost app info alltube | grep version | cut -d ':' -f 2)
-current_version=${current_version/ /''}
-
-if [  "2.2.1~ynh1" != "`echo -e "2.2.1~ynh1\n$current_version" | sort -V | head -n1`" ]; then
-	CURRENT_PHP_VERSION="7.0"
-else
-	CURRENT_PHP_VERSION="7.3"
-fi
-
-
 #=================================================
 # MANAGE SCRIPT FAILURE
 #=================================================
@@ -37,6 +27,7 @@ app=$YNH_APP_INSTANCE_NAME
 final_path=$(ynh_app_setting_get $app final_path)
 domain=$(ynh_app_setting_get $app domain)
 db_name=$(ynh_app_setting_get $app db_name)
+fpm_config_dir=$(ynh_app_setting_get $app fpm_config_dir)
 
 #=================================================
 # STANDARD BACKUP STEPS
@@ -59,7 +50,7 @@ ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
 #=================================================
 ynh_script_progression --message="Backing up php-fpm configuration..." --weight=1
 
-ynh_backup "/etc/php/$CURRENT_PHP_VERSION/fpm/pool.d/$app.conf"
+ynh_backup "$fpm_config_dir/pool.d/$app.conf"
 
 #=================================================
 # END OF SCRIPT

scripts/restore

@@ -29,6 +29,8 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get $app domain)
 path_url=$(ynh_app_setting_get $app path)
 final_path=$(ynh_app_setting_get $app final_path)
+fpm_config_dir=$(ynh_app_setting_get $app fpm_config_dir)
+fpm_service=$(ynh_app_setting_get $app fpm_service)
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
@@ -75,7 +77,7 @@ chown -R alltube: $final_path/templates_c/
 # RESTORE THE PHP-FPM CONFIGURATION
 #=================================================
 
-ynh_restore_file --origin_path="/etc/php/$YNH_PHP_VERSION/fpm/pool.d/$app.conf"
+ynh_restore_file --origin_path="$fpm_config_dir/pool.d/$app.conf"
 
 #=================================================
 # SPECIFIC RESTORATION
@@ -85,8 +87,13 @@ ynh_restore_file --origin_path="/etc/php/$YNH_PHP_VERSION/fpm/pool.d/$app.conf"
 ynh_script_progression --message="Reinstalling dependencies.." --weight=60
 
 # Define and install dependencies
-ynh_install_app_dependencies $pkg_dependencies
+if [ "$fpm_service" = "php7.0-fpm" ]; then
-ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+	apt_dependencies=$(ynh_app_setting_get $app apt_dependencies)
+	ynh_install_app_dependencies $apt_dependencie
+else
+	ynh_install_app_dependencies $pkg_dependencies
+	ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+fi
 
 #=================================================
 # GENERIC FINALIZATION

scripts/upgrade

@@ -22,6 +22,7 @@ domain=$(ynh_app_setting_get $app domain)
 path_url=$(ynh_app_setting_get $app path)
 is_public=$(ynh_app_setting_get $app is_public)
 final_path=$(ynh_app_setting_get $app final_path)
+fpm_service=$(ynh_app_setting_get $app fpm_service)
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
@@ -37,14 +38,12 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
-current_version=$(yunohost app info alltube | grep version | cut -d ':' -f 2)
-current_version=${current_version/ /''}
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility.." --weight=1
 
-if [  "2.2.1~ynh1" != "`echo -e "2.2.1~ynh1\n$current_version" | sort -V | head -n1`" ]; then
+if [ "$fpm_service" = "php7.0-fpm" ]; then
 	ynh_remove_fpm_config
 fi