#!/bin/bash

# Joerg Arndt's  cgrep
# ... online at http://www.jjj.de/
# your feedback is welcome  mailto: arndt (AT) jjj.de
# version: 2004-August-28 (13:42)

#set -vx

##################################
## Examples:

# cgrep -n PS1 ~/.profile
# man tar | cgrep -n -C2 tape
# locate howto | cgrep -i line
# locate howto | cgrep -i '[^\/]*line.*\b'

## cpipe might be be better for this:
# top -n 1 | cgrep -C999 bash
# pstree | cgrep -C999 bash

##################################

#GREP='grep'
GREP='grep --line-buffered'

IGNC='';  ## whether to ingnore case
for x in "$@"; do
    case $x in
        -i) IGNC='i'
            continue
            ;;
        -*) ## ignore all other options
            continue;
            ;;
        *) ## first nonoption is pattern
            PAT=$x;
            break;
            ;;
    esac
done


if [ ! -t 1 ]; then

    ## if output is a pipe then do not colorize
    ${GREP} "$@";

else

    ## if interrupted set:
#    trap "echo -n ''" 0 ## color to black and attributes to normal
    trap "echo -n ''" 0 ## attributes to normal

    ## red:
    #${GREP} "$@"  |  sed "s/$PAT/&/g${IGNC}"

    ## bold:
    #e${GREP} "$@"  |  sed "s/$PAT/&/g${IGNC}" | sed "s/^\([^:]*:\)/&/g"
    
    ## background-cyan:
    ${GREP} "$@"  |  sed "s/$PAT/&/g${IGNC}"
    
    ## reverse:
    #${GREP} "$@"  |  sed "s/$PAT/&/g${IGNC}"
    
    # underline (works only under X11):
    #${GREP} "$@"  |  sed "s/$PAT/&/g${IGNC}"
fi



exit $?
############################################