Pre-commit hook to prevent dummy text from being committed

gistfile1.txt

#!/bin/sh
#
# This git hook should let us prevent commits from containing words that we sometimes use
# as "sky is blue" proof that a method is working when it's behaving strangely. 

disallowed="poop fart poopy farty shit fuck"

git diff --cached --name-status | while read x file; do
        if [ "$x" == 'D' ]; then continue; fi
        for word in $disallowed
        do
            if egrep $word $file ; then
                echo "ERROR: Disallowed expression \"${word}\" in file: ${file}"
                exit 1
            fi
        done
done || exit $?