#!/bin/bash
 
if [ -z "$1" ]; then
	echo "I will not search for nothing!"
	exit 1
fi
DIR=/var/lib/pacman/sync
 
for REPO in core extra community; do (
#	echo -e "::Injecting $DIR/$REPO..."
	for PACKAGE in `ls $DIR/$REPO/`; do (
#		echo -e "::Checking $DIR/$REPO/$PACKAGE description..."
		# here we will do search and parse the results
		grep -qi $1 $DIR/$REPO/$PACKAGE/desc
		if [ "$?" -ne 1 ]; then
			echo "-------------------------"
			awk '/\%NAME\%/{getline;print}' $DIR/$REPO/$PACKAGE/desc
			awk '/\%DESC\%/{getline;print}' $DIR/$REPO/$PACKAGE/desc 			
			echo "in $DIR/$REPO/$PACKAGE"
		fi	
	);done
);done

[01:56:58][~]# paclook tux     
-------------------------
eigen
Eigen is a lightweight C++ template library for vector and matrix math, a.k.a. linear algebra.
in /var/lib/pacman/sync/extra/eigen-2.0.9-1
-------------------------
esound
Enlightened Sound Daemon
in /var/lib/pacman/sync/extra/esound-0.2.41-1
-------------------------
graveman
A CD-burning frontend for mkisofs, cdrecord and friends
in /var/lib/pacman/sync/extra/graveman-0.3.12.5-5
-------------------------
hibernate-script
Set of scripts for managing tux on ice, hibernation and suspend to RAM
in /var/lib/pacman/sync/extra/hibernate-script-1.99-2
-------------------------
kdetoys-ktux
KTux
in /var/lib/pacman/sync/extra/kdetoys-ktux-4.3.4-1
^C