From 293814277d2b9bb7b89f3f203962a43e0a1b8aaa Mon Sep 17 00:00:00 2001
From: paspo <paolo@asperti.com>
Date: Tue, 16 Dec 2025 13:51:50 +0100
Subject: [PATCH] retention

---
 README.md            |  1 +
 rootfs/app/backup.sh | 27 ++++++++++++++++++++++++---
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 78d1628..48ee25e 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ services:
       MARIADB_DATABASE: my-db
       CRONTAB: "15 */4 * * *"
       COMPRESSION: gzip  # gzip | bzip2 | xz | zstd
+      KEEP_SUCCESFUL_DAYS: 15  # default is 30
       RCLONE_REMOTE: myremote
       RCLONE_PATH: /backups
       RCLONE_CONFIG_FILE: /config/rclone.conf
diff --git a/rootfs/app/backup.sh b/rootfs/app/backup.sh
index 41dd3fc..57a202b 100755
--- a/rootfs/app/backup.sh
+++ b/rootfs/app/backup.sh
@@ -11,11 +11,12 @@ COMPRESSION=${COMPRESSION:-gzip}
 RCLONE_CONFIG_FILE=${RCLONE_CONFIG_FILE:-/config/rclone.conf}
 RCLONE_REMOTE=${RCLONE_REMOTE:-myremote}
 RCLONE_PATH=${RCLONE_PATH:-/backups}
+KEEP_SUCCESFUL_DAYS=${KEEP_SUCCESFUL_DAYS:-30}
 
 TMPDIR=$(mktemp -d)
 DEST_FILENAME=$(date +%Y-%m-%d_%H-%M-%S).sql
 BACKUP_FILE="${TMPDIR}/${DEST_FILENAME}"
-RCLONE_PATH="${RCLONE_PATH}/$(date +%Y-%m-%d)"
+RCLONE_DEST_PATH="${RCLONE_PATH}/$(date +%Y-%m-%d)"
 
 trap cleanup EXIT
 cleanup() {
@@ -55,6 +56,11 @@ copy_failed() {
   exit 1
 }
 
+delete_failed() {
+  echo "Cleanup delete failed"
+  exit 1
+}
+
 COMPRESSOR="cat"
 if [ "${COMPRESSION}" = "gzip" ]; then
   COMPRESSOR="gzip"
@@ -100,12 +106,27 @@ echo "Copying backup to remote"
 
 rclone \
   -v --config "${RCLONE_CONFIG_FILE}" \
-  mkdir "${RCLONE_REMOTE}:${RCLONE_PATH}" || mkdir_failed
+  mkdir "${RCLONE_REMOTE}:${RCLONE_DEST_PATH}" || mkdir_failed
 
 rclone \
   -v --config "${RCLONE_CONFIG_FILE}" \
-  copy "${BACKUP_FILE}" "${RCLONE_REMOTE}:${RCLONE_PATH}" || copy_failed
+  copy "${BACKUP_FILE}" "${RCLONE_REMOTE}:${RCLONE_DEST_PATH}" || copy_failed
 
 echo "success" > "${STATUS_FILE}"
 
 echo "Backup completed"
+
+echo "Cleaning up old backups"
+
+rclone \
+  -v --config "${RCLONE_CONFIG_FILE}" \
+  lsd "${RCLONE_REMOTE}:${RCLONE_PATH}" | \
+  awk '{print $5}' | sort -r | tail -n +$((KEEP_SUCCESFUL_DAYS + 1)) \
+  | while read -r line; do
+    echo "Deleting backup: ${line}"
+    rclone \
+      -v --config "${RCLONE_CONFIG_FILE}" \
+      purge "${RCLONE_REMOTE}:${RCLONE_PATH}/${line}" || delete_failed
+  done
+
+echo "Cleanup completed"