rotating sqlite backups

backup/backup-sqlite.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+
+#
+# Create rotating SQLite backups
+#
+
+# Backup location
+BACKUP_PATH='/private-backup/sqlite'
+
+# Location of the database
+MY_DATABASE="/var/lib/sqlite/users.sqlite"
+
+# Maximum number of backups
+ROT_PERIOD=30
+
+
+# fetch biggest id in dir
+cd "$BACKUP_PATH" || exit
+
+BIG_ID=$( ls -1 *_dump.gz | tail -n 1 | cut -d '_' -f 1 ) &> /dev/null
+
+if [ ! "$BIG_ID" ];
+then
+  BIG_ID=0
+fi
+
+# rotation if at least 1_dump.gz
+NEXT_ID=0
+for i in $( seq 1 $BIG_ID );
+do
+  NEXT_ID=$((i+1))
+  NEXT_FILENAME=$NEXT_ID'_dump.gz'
+  FILENAME="$i""_dump.gz"
+    if [ -e "$FILENAME" ];
+    then
+     # echo "$FILENAME exists"
+     if [ "$i" = "$ROT_PERIOD"  ];
+     then
+       # echo "Removing oldest archive..."
+       rm "$i""_dump.gz"
+     else
+       # echo "Rotating $i..."
+       cp "$FILENAME" "$NEXT_FILENAME"
+     fi
+    fi
+done
+
+# Converting  entire database to an ASCII text file
+echo '.dump' | sqlite3 "$MY_DATABASE" | gzip -c >"$BACKUP_PATH/1_dump.gz"