frep.sh

#!/usr/bin/env bash
# find and replace by regexp in many files
PRUNE=""
REPLACE=""
print_usage() {
    echo "USAGE: $(basename $0) [--prune EXTENSIONS] [--replace REPLACE] SEARCH"
    echo "  EXTENSIONS  Comma separated list of file extensions to ignore"
    exit 1
}
while true
do
    case "$1" in
        --prune) PRUNE="$PRUNE,$2" ; shift 2 ;;
        --replace) REPLACE="$2" ; shift 2 ;;
        --help) print_usage ;; 
        --) shift ; break ;;
        *) break ;;
	  esac
done
if [ $# -eq 0 ]
then
    print_usage
fi

if [ $PRUNE ];
then
    FIND_ARGUMENTS=`echo $PRUNE | sed "s/,*\([^,]*\)/ -o -name '*\1'/g"`
else
    FIND_ARGUMENTS=""
fi
FIND_ARGUMENTS="-name .svn $FIND_ARGUMENTS"
FIND_COMMAND="find . \( $FIND_ARGUMENTS \) -prune -o -type f -print0"

if [ "$REPLACE" == "" ];
then
    eval $FIND_COMMAND | xargs -0 grep --with-filename --line-number --ignore-case --color='always' "$1" | sed -e 's/^\([^:]*\):\([^:]*\):/\1 : \2 :/g'
else
    eval $FIND_COMMAND | xargs -0 grep --with-filename --line-number --ignore-case --files-with-matches "$1" | xargs sed -i -e "s/$1/$REPLACE/g"
fi