From 412efad20f27c7af17473615d60deefad3bbcdfa Mon Sep 17 00:00:00 2001
From: thecalcaholic <6317548+theCalcaholic@users.noreply.github.com>
Date: Wed, 28 Sep 2022 14:20:14 +0200
Subject: run-parts.sh: Backup docker instance when starting container

Signed-off-by: thecalcaholic <6317548+theCalcaholic@users.noreply.github.com>
---
 build/docker/debian-ncp/run-parts.sh | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/build/docker/debian-ncp/run-parts.sh b/build/docker/debian-ncp/run-parts.sh
index 0099a5a1..abcde008 100755
--- a/build/docker/debian-ncp/run-parts.sh
+++ b/build/docker/debian-ncp/run-parts.sh
@@ -13,7 +13,31 @@ sed -i 's|/data-ro|/data|' "/etc/mysql/mariadb.conf.d/90-ncp.cnf" || true
 trap cleanup SIGTERM
 
 # if an empty volume is mounted to /data, pre-populate it
-[[ $( ls -1A /data | wc -l ) -eq 0 ]] && { echo "Initializing empty volume.."; cp -raT /data-ro /data; }
+if [[ $( ls -1A /data | wc -l ) -eq 0 ]]
+then
+  echo "Initializing empty volume.."
+  cp -raT /data-ro /data
+else
+  echo "Cleanup old startup backups..."
+  BKPS="$(ls -1t "$BKPDIR"/nextcloud-bkp_*.tar.gz 2>/dev/null)"
+  while read -r bkp
+  do
+    rm -f "$BKPDIR/$bkp"
+  done <"$(echo "$BKPS" | tail -n + 5)"
+  BKPDIR=/data/ncp-startup-backups/
+  WITH_DATA=no
+  COMPRESSED=yes
+  LIMIT=0
+  mkdir -p "$BKPDIR"
+  echo "Back up current instance..."
+  set +eE
+  if ncp-backup "$BKPDIR" "$WITH_DATA" "$COMPRESSED" "$LIMIT"
+  then
+    echo "Backup stored at '$BKPDIR/$(ls -1t "$BKPDIR"/nextcloud-bkp_*.tar.gz 2>/dev/null | head -n1)'"
+  else
+    echo 'WARN: Backup creation failed'
+  fi
+fi
 
 # wrapper to simulate update-rc.d
 cat > /usr/local/sbin/update-rc.d <<'EOF'
-- 
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