#! /usr/bin/perl -w

use strict;

my $pkglist = "/home/eelco/.nixactivations";

if (!-f $pkglist) {
    system "touch $pkglist";
}

my $hash;
foreach $hash (@ARGV) {
    system "grep -q $hash $pkglist";
    if ($?) {
	print STDERR "activating $hash\n";
	system "nix getpkg $hash > /dev/null";
	if ($?) { die "`nix getpkg' failed"; }
	system "echo $hash >> $pkglist";
    }
}

system "nix-populate";