Continuous build script

build.sh

#!/bin/bash

SHASUM="HELLO WORLD"

while true; do
FILENAME=`ls -ltrap *.hs | grep -v / | awk  '{print $9}' | tail -1`
tmp_SHASUM=`shasum $FILENAME`
# echo "$tmp_SHASUM"
if [ "$SHASUM" != "$tmp_SHASUM" ]; then
#     echo "Strings are not equal"
    HASKFILE=`echo $tmp_SHASUM | awk '{print $2}'`
    runghc "$HASKFILE"
    SHASUM="$tmp_SHASUM"
fi
sleep 5;
done