From 038280e26ed71facff8675181db4bcd6f8c2e793 Mon Sep 17 00:00:00 2001
From: Eric Nemchik <eric@nemchik.com>
Date: Sat, 17 Jun 2023 21:37:15 -0500
Subject: [PATCH] Add max upgrade check

Signed-off-by: Eric Nemchik <eric@nemchik.com>
---
 root/etc/s6-overlay/s6-rc.d/init-nextcloud-config/run | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/root/etc/s6-overlay/s6-rc.d/init-nextcloud-config/run b/root/etc/s6-overlay/s6-rc.d/init-nextcloud-config/run
index b9153f9..2f7f849 100755
--- a/root/etc/s6-overlay/s6-rc.d/init-nextcloud-config/run
+++ b/root/etc/s6-overlay/s6-rc.d/init-nextcloud-config/run
@@ -50,6 +50,10 @@ installed_version=$(php -r "require '/config/www/nextcloud/config/config.php'; e
 if [ "${installed_version}" = "" ]; then
     installed_version="0.0.0.0"
 fi
+image_major="${image_version%%.*}"
+installed_major="${installed_version%%.*}"
+max_upgrade=
+((max_upgrade=installed_major+1))
 
 # compare versions
 vergte() { printf '%s\n%s' "${2}" "${1}" | sort -C -V; }
@@ -57,6 +61,11 @@ vergt() { ! vergte "${2}" "${1}"; }
 verlte() { printf '%s\n%s' "${1}" "${2}" | sort -C -V; }
 verlt() { ! verlte "${2}" "${1}"; }
 
+if [ "${installed_version}" != "0.0.0.0" ] && vergt "${image_version}" "${max_upgrade}"; then
+    echo "Can't start Nextcloud because the version of the data (${installed_version}) is more than one major version behind the docker image version (${image_version}) and upgrading more than one major version is not supported. Please run an image tagged for the major version ${max_upgrade} first."
+    sleep infinity
+fi
+
 if vergt "${installed_version}" "${image_version}"; then
     echo "Can't start Nextcloud because the version of the data (${installed_version}) is higher than the docker image version (${image_version}) and downgrading is not supported. Are you sure you have pulled the newest image version?"
     sleep infinity