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#! /usr/bin/perl -w
my $prefix = $ENV{"NIX"} || "/nix"; # !!! use prefix
my $etcdir = "$prefix/etc/nix";
my $exportdir = "$prefix/var/nix/prebuilts/exports";
my $knowns = "$prefix/var/nix/known-prebuilts";
umask 0022;
# For performance, put the known hashes in an associative array.
my %knowns = ();
open KNOWNS, "<$knowns";
while (<KNOWNS>) {
next unless /([0-9a-z]{32})/;
$knowns{$1} = 1;
}
close KNOWNS;
# For each installed package, check whether a prebuilt is known.
open PKGS, "nix listinst|";
while (<PKGS>) {
chomp;
next unless /([0-9a-z]{32})/;
my $pkghash = $1;
if (!defined $knowns{$1}) {
# No known prebuilt exists for this package; so export it.
print "exporting $pkghash...\n";
system "nix export '$exportdir' $pkghash";
if ($?) { die "`nix export' failed"; }
}
}
close PKGS;
# Push the prebuilts to the server. !!! FIXME
system "rsync -av -e ssh '$exportdir'/ eelco\@losser.st-lab.cs.uu.nl:/home/eelco/public_html/nix-prebuilts/";
# Rerun `nix-pull-prebuilts' to rescan the prebuilt source locations.
print "running nix-pull-prebuilts...";
system "nix-pull-prebuilts";
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