#!/bin/bash
#
[ $# -lt 1 ] && echo "usage $0 pkg_list (generated with pacman -Q)" && exit 1

tmp=/tmp/__pkgs
[ -e $tmp ] && rm $tmp

echo " * read packages list"
pkgs=`cat $1 | gawk '{ print $1 }'`
echo " * search packages to install"
for pkg in $pkgs; do
    pacman -Q $pkg >/dev/null 2>&1 || echo $pkg >> $tmp
done
if [ -e $tmp ]; then
    echo " * install packages"
    pkgs=$(cat $tmp)
    pacman -S $pkgs || exit 1
    echo " * done"
else
    echo " * nothing todo"
fi