From 52c685bc842bc5fc14c2634b99022c560f0a3ca7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Gaspar?=
 <46165813+ericgaspar@users.noreply.github.com>
Date: Sat, 4 Mar 2023 18:48:00 +0100
Subject: [PATCH] fix

---
 doc/POST_UPGRADE.md |  3 +++
 scripts/upgrade     | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 doc/POST_UPGRADE.md

diff --git a/doc/POST_UPGRADE.md b/doc/POST_UPGRADE.md
new file mode 100644
index 0000000..06a3064
--- /dev/null
+++ b/doc/POST_UPGRADE.md
@@ -0,0 +1,3 @@
+Your SMP server address:
+
+smp://__FINGERPRINT__@__PUBLIC_IP4__:__PORT__
\ No newline at end of file
diff --git a/scripts/upgrade b/scripts/upgrade
index 256d212..4e4a699 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -15,6 +15,23 @@ source /usr/share/yunohost/helpers
 
 upgrade_type=$(ynh_check_app_version_changed)
 
+#=================================================
+# ENSURE DOWNWARD COMPATIBILITY
+#=================================================
+ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+
+# If public_ip4 doesn't exist, create it
+if [ -z "$public_ip4" ]; then
+	public_ip4="$(curl -s ip.yunohost.org)" || true)
+	ynh_app_setting_set --app=$app --key=public_ip4 --value=$public_ip4
+fi
+
+# If fingerprint doesn't exist, create it
+if [ -z "$fingerprint" ]; then
+	fingerprint=$(cat /etc/opt/simplex/fingerprint)
+	ynh_app_setting_set --app=$app --key=fingerprint --value=$fingerprint
+fi
+
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================