From 3acb44aa7857424f47ef366adc4851b4b7670a71 Mon Sep 17 00:00:00 2001
From: Kienan Stewart <kienan@koumbit.org>
Date: Wed, 14 Oct 2020 16:35:44 -0400
Subject: [PATCH 1/2] Update upgrade notice to mention passing through 3.3.12

Refs #415 #416
---
 README.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index cf256069..7f2fb4e9 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,11 @@ This project native language is French, and the code is commented in English. Th
 
 [Pour installer AlternC, merci de suivre la documentation d'installation](https://alternc.com/Install-fr)
 
-### Upgrading from AlternC 3.[1,2,3].11
+### Upgrading from AlternC 3.[1,2,3].11 or earlier
+
+The recommended process for upgrading is to upgrade to 3.3.12 before upgrading to 3.5. If
+you choose to upgrade directly to 3.5 from an earlier version, please read this information
+as there is a risk of a loss of data.
 
 AlternC >= 3.5 removes integrates alternc-ssl and alternc-admintools in the the core AlternC package.
 

From 695ba518dd3e70ebd8c2da139f12c48e69a02a71 Mon Sep 17 00:00:00 2001
From: Kienan Stewart <kienan@koumbit.org>
Date: Wed, 14 Oct 2020 17:47:07 -0400
Subject: [PATCH 2/2] Add confirmation to preinstallation to warn about data
 loss

Refs #415
---
 debian/alternc.preinst   | 10 +++++++++-
 debian/alternc.templates |  9 +++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/debian/alternc.preinst b/debian/alternc.preinst
index 6a57519d..2efee940 100644
--- a/debian/alternc.preinst
+++ b/debian/alternc.preinst
@@ -1,7 +1,6 @@
 #!/bin/bash
 
 set -e
-
 . /usr/share/debconf/confmodule
 
 # Create AlternC Panel user for web server
@@ -64,6 +63,15 @@ case "$1" in
             echo "/etc/bind/master was not empty. Please remove it manually."
     fi
 
+    if dpkg --compare-versions "$2" lt "3.3.12"; then
+        db_input high alternc/confirm_unsupported_upgrade
+        db_go
+        db_get alternc/confirm_unsupported_upgrade
+        if [ "$RET" == "false" ] ; then
+           echo "User chose to abort installation" >&2
+           exit 1
+        fi
+    fi
     ;;
 
   abort-upgrade)
diff --git a/debian/alternc.templates b/debian/alternc.templates
index 53e45640..70b25594 100644
--- a/debian/alternc.templates
+++ b/debian/alternc.templates
@@ -264,3 +264,12 @@ _Description: Remote mysql: connection error
  .
  This is a fatal error and will cause the package installation
  to fail.
+
+Template: alternc/confirm_unsupported_upgrade
+Type: boolean
+_Description: This upgrade may incur data loss. Continue anyway?
+ When upgrading from AlternC < 3.3.12 to AlternC 3.5, sub domains
+ with SSL will be lost. It is recommended to upgrade to 3.3.12
+ before upgrading to 3.5.
+ .
+ If you chose to not continue, this package installation will fail.
\ No newline at end of file