wg

#!/bin/sh

#define by Kent(2008/12/05), add 
#-i: ignore-case
#--colour=auto: Surround the matching string with the marker find in GREP_COLOR environment variable (RECMOMMENDED)
WCGREP_GREPARGS="-HnIi --colour=auto --mmap"
WCGREP_GREP="grep"
WCGREP_IGNORE=".*/\.git\(/\|$\)\|.*/tags\|.*/cscope.out\|.*~$\|.*/\.svn.*\(/\|$\)"

# below IFS is the keypoint
IFS=$'\t '

if [ "$#" -eq 0 ]; then
	echo "Usage: wg PATTERN [INDEX]"
	echo "       Open [INDEX]-th file by editor: $EDITOR"
	exit 0
fi

pattern="$1"
INDEX=$2

function _wcgrep() 
{
	find $pathargs -regex ${WCGREP_IGNORE:-'.*/\.git\(/\|$\)\|.*~$\|.*/\.svn\(/\|$\)'} -prune -o \
		-type f -print0 | xargs -r0 ${WCGREP_GREP:-grep} ${WCGREP_GREPARGS:--HnI} \
		$grepargs "$pattern" | nl -n ln | grep -Ii --colour=auto $grepargs "$pattern"
}

if [ -n "$INDEX" ]; then
	result=$(_wcgrep)

	if [[ "$INDEX" == "a" ]]; then
		#FIXME: Why "tr" executed before "cut" in this statement FILENAME=`echo $result | cut -d ":" -f 1 | tr '\n' '@' | sed 's/@/ /g' 
		FILENAME=`echo $result | awk '{print $2}' | cut -d ":" -f 1 | uniq` 
		FILENAME1=`echo $FILENAME | tr '\n' '@' | sed 's/@/ /g'`
		echo Edit $INDEX, Filename: $FILENAME1
		$EDITOR -X -p $FILENAME1
	else
		str=`echo $result | sed -n "${INDEX}p" | awk '{print $2}'`
		FILENAME=`echo $str | cut -d ":" -f 1`
		LINENUMBER=`echo $str |  cut -d ":" -f 2`
		$EDITOR $FILENAME +$LINENUMBER
	fi
else
	_wcgrep
fi