Rotate cronscripts logs

Configurable per variable (override in local vars file), we keep (by
default) only 60 days

config/common/variables

@@ -35,6 +35,9 @@ PATH=${masterdir}:${PATH}
 # By default, add no timestamps to stage logs
 TIMESTAMP=false
 
+# How many days of logfiles to keep?
+declare -r logkeep=${logkeep:-60}
+
 declare -r HOSTNAME=$(hostname -s)
 
 # where do we want mails to go? For example log entries made with error()

config/debian/cronscript

@@ -287,6 +287,9 @@ function laststeps() {
     # and ensure its no longer used
     exec > "$logdir/after${PROGRAM}.log" 2>&1
 
+    # Rotate out old logfiles
+    find ${logdir}/${PROGRAM}_*.log.bz2 -mtime +${logkeep} -delete
+
     # Now, at the very (successful) end of this run, make sure we remove
     # our stage files, so the next script run will do it all again.
     if [[ ${successval} -eq 0 ]]; then