Install/remove php only on stretch

scripts/install

@@ -56,9 +56,11 @@ ynh_app_setting_set --app=$app --key=user_home --value=$user_home
 #=================================================
 ynh_script_progression --message="Installing dependencies..." --weight=60
 
-ynh_install_app_dependencies $pkg_dependencies
-
-ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+if [ "$(lsb_release --codename --short)" = "buster" ]; then
+	pkg_dependencies="$pkg_dependencies $extra_pkg_dependencies"
+else
+	ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+fi
 
 #=================================================
 # CREATE A MYSQL DATABASE

scripts/remove

@@ -30,6 +30,10 @@ ynh_script_progression --message="Removing dependencies..." --weight=20
 # Remove metapackage and its dependencies
 ynh_remove_app_dependencies
 
+if [ "$(lsb_release --codename --short)" = "stretch" ]; then
+	ynh_remove_php
+fi
+
 #=================================================
 # REMOVE THE MYSQL DATABASE
 #=================================================

scripts/restore

@@ -93,10 +93,11 @@ 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 $pkg_dependencies
-
-ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+if [ "$(lsb_release --codename --short)" = "buster" ]; then
+	pkg_dependencies="$pkg_dependencies $extra_pkg_dependencies"
+else
+	ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+fi
 
 #=================================================
 # RESTORE THE CRON FILE

scripts/upgrade

@@ -137,9 +137,11 @@ path_url=$(ynh_normalize_url_path --path_url=$path_url)
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..." --weight=7
 
-ynh_install_app_dependencies $pkg_dependencies
-
-ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+if [ "$(lsb_release --codename --short)" = "buster" ]; then
+	pkg_dependencies="$pkg_dependencies $extra_pkg_dependencies"
+else
+	ynh_install_php --phpversion="$YNH_PHP_VERSION" --package="$extra_pkg_dependencies"
+fi
 
 #=================================================
 # STANDARD UPGRADE STEPS