add cleanup script | fix verilator unknown bin

.circleci/clean-old-files.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# clean directories that are older than 30 days
+
+# get shared variables
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+source $SCRIPT_DIR/defaults.sh
+
+age () {
+	local AGE_SEC
+	local CUR_SEC
+	local DIFF_SEC
+	local SEC_PER_DAY
+
+	SEC_PER_DAY=86400
+
+	CUR_SEC=$(date +%s)
+	AGE_SEC=$(stat -c %Y -- "$1")
+	DIFF_SEC=$(expr $CUR_SEC - $AGE_SEC)
+
+	echo $(expr $DIFF_SEC / $SEC_PER_DAY)
+}
+
+for d in $CI_DIR/*/ ; do
+	DIR_AGE="$(age $d)"
+	if [ $DIR_AGE -ge 30 ]; then
+		echo "Deleting $d since is it $DIR_AGE old"
+		rm -rf $d
+	fi
+done