findIn

#!/bin/bash
#
# Whenever I want to find something in a folder hierarchy,
# but only for a specific type of files...
#
# e.g.:
#
#    findIn .py '^def.*order'
#
# or
#
#    findIn '.[ch]' '^void'
#
# To make a case-insensitive search, pass "-i" in front (before the extension)
# To make a whole-word search, pass "-w" in front (before the extension)

usage() {
    echo -e "Usage: $0 [-h] [-i] [-w] .extension regexp"
    echo -e "Where:"
    echo -e "\t-h\t\tshow this help"
    echo -e "\t-w\t\tperform word-boundary search"
    echo -e "\t-i\t\tperform case insensitive search"
    echo -e "\t-n\t\tshow line numbers in results"
    echo -e "\t.extension\tthe file extension to search in (e.g. .c, .py, etc)"
    echo -e "\tregexp\t\tthe regular expression to search for"
    exit 1
}

[ $# -eq 0 ] && usage

CASE=""
WORD=""
LINENOS=""
while getopts "iwhn" o ; do
    case "${o}" in 
        h)
            usage
            ;;
        i)
            CASE="-i"
            ;;
        w)
            WORD="-w"
            ;;
        n)
            LINENOS="-n"
            ;;
        *)
            usage
            ;;
    esac
done
            
shift $((OPTIND-1))

EXTENSION="$(echo "$1" | sed 's/\./\\./g')"

shift

# If output goes to a tty, I don't want a wrap around, but I do want colors
if [ -t 1 ] ; then
    COLORS="always"
    tput rmam  # Stop wrapping
else
    COLORS="none"
fi

# Go fetch!
find . -type f -iname '*'"${EXTENSION}" -exec \
    grep ${CASE} ${WORD} ${LINENOS} --color="$COLORS" -- "$@" '{}' /dev/null \; 2>/dev/null

# Reset wrapping
if [ -t 1 ] ; then
    tput smam
fi