lix/scripts/nix-pull-prebuilts

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#! /usr/bin/perl -w
my $prefix = $ENV{"NIX"} || "/nix"; # !!! use prefix
my $etcdir = "$prefix/etc/nix";
my $knowns = "$prefix/var/nix/known-prebuilts";
my $tmpfile = "$prefix/var/nix/prebuilts.tmp";
my $conffile = "$etcdir/prebuilts.conf";
sub register {
my $fn = shift;
return unless $fn =~ /([^\/]*)-([0-9a-z]{32})-([0-9a-z]{32})\.tar\.bz2/;
my $id = $1;
my $pkghash = $2;
my $prebuilthash = $3;
print "$pkghash => $prebuilthash ($id)\n";
system "nix regprebuilt $pkghash $prebuilthash";
if ($?) { die "`nix regprebuilt' failed"; }
print KNOWNS "$pkghash\n";
}
open KNOWNS, ">$knowns";
open CONFFILE, "<$conffile";
while (<CONFFILE>) {
chomp;
if (/^\s*(\S+)\s*(\#.*)?$/) {
my $url = $1;
print "obtaining prebuilt list from $url...\n";
if ($url =~ /^\//) {
# It's a local path.
foreach my $fn (glob "$url/*") {
register $fn;
}
} else {
# It's a URL.
system "wget '$url' -O '$tmpfile' 2> /dev/null"; # !!! escape
if ($?) { die "`wget' failed"; }
open INDEX, "<$tmpfile";
while (<INDEX>) {
# Get all links to prebuilts, that is, file names of the
# form foo-HASH-HASH.tar.bz2.
next unless (/HREF=\"([^\"]*)\"/);
my $fn = $1;
next if $fn =~ /\.\./;
next if $fn =~ /\//;
register $fn;
}
close INDEX;
unlink $tmpfile;
}
}
}
close CONFFILE;
close KNOWNS;