Find all occurrences of the files of DIR into other files and delete then

find-and-delete.sh

#!/bin/bash
HELP="Usage: $(basename ${0}) DIR
   or: $(basename ${0}) --help

Find all occurrences of the files of DIR into other files and delete then if 
there is no occurrence.

    --help  display this help and exit

Exemplos:
    
    $(basename ${0}) web/images
    $(basename ${0}) web/css

Report bugs to <fix@it.yourself>.";
if [ ! "${1}" ]
then
    echo "${HELP}" 1>&2;
    exit 1;
elif [ "${1}" == '--help' ]
    then
    echo "${HELP}";
    exit 0;
fi;

find "${1}" -name '*.*' | sort | while read filename; 
do
    basename=$(basename "${filename}");
    pattern=$(echo "${basename}" | sed 's/\./\\./g');
    occurrences=$(egrep -R "\b${pattern}\b" --include=*.* . | wc -l);
    message="${basename} has ${occurrences} occurrences";
    if [ ${occurrences} -eq 0 ]
    then
        message="${message}: $(rm -fv ${filename})";
    fi;
    echo "${message}";
done;