#!/bin/sh

if [ "$#" -gt 1 ]; then
	echo "Usage: delete_whitespaces <directory>"
	exit 1
fi

if [ "$#" -eq 0 ]; then
	dir="$(pwd)"
else
	dir="$1"
fi

cd "$dir" || {
	echo "Couldn't cd to directory. Exiting..."
	exit 1
}

for file in "$dir"/*; do
	newname="$(echo "$file" | sed 's/[ \t]/\_/g')"
	mv "$file" "$newname"
done

exit 0