Fix broken conditional check that identifies whether content is cached in order to clean it.

.sandstorm/launcher.sh

@@ -53,20 +53,19 @@ function cleanup()
 {
     local data_path="$1"        # full path to data directory of wiki
     local retention_days="$2"   # number of days after which old files are to be removed
- 
+
     # purge files older than ${retention_days} days from attic and media_attic (old revisions)
     find "${data_path}"/{media_,}attic/ -type f -mtime +${retention_days} -delete
- 
+
     # remove stale lock files (files which are 1-2 days old)
     find "${data_path}"/locks/ -name '*.lock' -type f -mtime +1 -delete
- 
+
     # remove empty directories
     find "${data_path}"/{attic,cache,index,locks,media,media_attic,media_meta,meta,pages,tmp}/ \
         -mindepth 1 -type d -empty -delete
- 
+
     # remove files older than ${retention_days} days from the cache
-    if [ -e "${data_path}"/cache/?/ ]
-    then
+    if [ ! -z "$(ls -A $data_path/cache)" ]; then
         find "${data_path}"/cache/?/ -type f -mtime +${retention_days} -delete
     fi
 }