disable skip comments only when needed

backup.sh

@@ -29,7 +29,13 @@ do
     echo "==> Dumping database: $db"
     FILENAME=/backup/$DATE.$db.sql
     LATEST=/backup/latest.$db.sql
-    if mysqldump --single-transaction --skip-comments $MYSQLDUMP_OPTS -h "$MYSQL_HOST" -P "$MYSQL_PORT" -u "$MYSQL_USER" -p"$MYSQL_PASS" $MYSQL_SSL_OPTS "$db" > "$FILENAME"
+    BASIC_OPTS="--single-transaction"
+    if [ -n "$REMOVE_DUPLICATES" ]
+    then
+      echo "WARNING: disabling comments in backup to remove deuplicate backups. Automatic database name detection won't work so set MYSQL_DATABASE on restore"
+      BASIC_OPTS="$BASIC_OPTS" --skip-comments
+    fi
+    if mysqldump $BASIC_OPTS $MYSQLDUMP_OPTS -h "$MYSQL_HOST" -P "$MYSQL_PORT" -u "$MYSQL_USER" -p"$MYSQL_PASS" $MYSQL_SSL_OPTS "$db" > "$FILENAME"
     then
       EXT=
       if [ -z "${USE_PLAIN_SQL}" ]

docker-compose.yaml

@@ -30,6 +30,7 @@ services:
     environment:
       - MYSQL_HOST=my_mariadb
       - MYSQL_USER=root
+      - MYSQL_DATABASE=${DATABASE_NAME}
       - MYSQL_PASS=${MARIADB_ROOT_PASSWORD}
       - MAX_BACKUPS=1
       - INIT_BACKUP=1