From 5e9306ad405136a47a867be6ef35b74eb751c85f Mon Sep 17 00:00:00 2001
From: Andrea Rabbaglietti <rabbagliettiandrea@gmail.com>
Date: Mon, 2 Oct 2017 17:37:17 +0200
Subject: [PATCH 1/3] Fix #2927

Fix to prevent dokku upgrade on debian systems overwrites ${DOKKU_ROOT}/VHOST
---
 debian/postinst | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/debian/postinst b/debian/postinst
index e6a1f2412..f43db7b10 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -100,14 +100,16 @@ case "$1" in
       exit 0
     fi
 
-    db_get "dokku/vhost_enable"
-    if [ "$RET" = "true" ]; then
-        db_get "dokku/hostname"
-        echo "$RET" > "${DOKKU_ROOT}/VHOST"
-    else
-        rm -f "${DOKKU_ROOT}/VHOST"
+    if [ ! -f "${DOKKU_ROOT}/VHOST" ]; then
+      db_get "dokku/vhost_enable"
+      if [ "$RET" = "true" ]; then
+          db_get "dokku/hostname"
+          echo "$RET" > "${DOKKU_ROOT}/VHOST"
+      else
+          rm -f "${DOKKU_ROOT}/VHOST"
+      fi
     fi
-
+    
     db_get "dokku/hostname"
     echo "$RET" > "${DOKKU_ROOT}/HOSTNAME"
 

From f664ad1cdeb00812b28c987692a7e7edf2cff609 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Mon, 2 Oct 2017 11:40:31 -0400
Subject: [PATCH 2/3] fix: remove extra whitespace

---
 debian/postinst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/debian/postinst b/debian/postinst
index f43db7b10..7b4d68054 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -109,7 +109,7 @@ case "$1" in
           rm -f "${DOKKU_ROOT}/VHOST"
       fi
     fi
-    
+
     db_get "dokku/hostname"
     echo "$RET" > "${DOKKU_ROOT}/HOSTNAME"
 

From 093414b846a269570b35f6dd6291f54b1085cb69 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Mon, 2 Oct 2017 11:48:29 -0400
Subject: [PATCH 3/3] feat: add logging

---
 debian/postinst | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/debian/postinst b/debian/postinst
index 7b4d68054..5f4643b4d 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -100,12 +100,16 @@ case "$1" in
       exit 0
     fi
 
-    if [ ! -f "${DOKKU_ROOT}/VHOST" ]; then
+    if [ -f "${DOKKU_ROOT}/VHOST" ]; then
+      echo "VHOST file detected, skipping modification"
+    else
       db_get "dokku/vhost_enable"
       if [ "$RET" = "true" ]; then
           db_get "dokku/hostname"
+          echo "Setting VHOST contents to $RET"
           echo "$RET" > "${DOKKU_ROOT}/VHOST"
       else
+          echo "VHOST disabled via debconf, removing"
           rm -f "${DOKKU_ROOT}/VHOST"
       fi
     fi