path: root/scripts/nix-push

#! /usr/bin/perl -w

my @pushlist;

foreach my $hash (@ARGV) {

    die unless $hash =~ /^([0-9a-z]{32})$/;

    # Get all paths referenced by the normalisation of the given 
    # fstate expression.
    my @paths;
    open PATHS, "nix -qrh $hash 2> /dev/null |" or die "nix -qrh";
    while (<PATHS>) {
	chomp;
	next unless /^\//;
	push @paths, $_;
    }
    close PATHS;

    # For each path, create a Fix expression that turns the path into
    # a Nix archive.
    foreach my $path (@paths) {

	# Hash the path.
	my $phash = `nix-hash $path`;
	$? and die "nix-hash";
	chomp $phash;
	die unless $phash =~ /^([0-9a-z]{32})$/;

	# Construct a Fix expression that creates a Nar archive.
	my $fixexpr = 
          "App(IncludeFix(\"nar/nar.fix\"), " .
          "[ (\"path\", Path(\"$path\", Hash(\"$phash\"), [Include(\"$hash\")]))" .
          ", (\"name\", \"$phash.nar\")" .
          "])";
	
	my $fixfile = "/tmp/nix-push-tmp.fix";
	open FIX, ">$fixfile";
	print FIX $fixexpr;
	close FIX;

	# Instantiate a Nix expression from the Fix expression.
	my $nhash = `fix $fixfile`;
	$? and die "instantiating Nix archive expression";
	chomp $nhash;
	die unless $nhash =~ /^([0-9a-z]{32})$/;

	# Realise the Nix expression.
	my $npath = `nix -qph $nhash 2> /dev/null`;
	$? and die "creating Nix archive";
	chomp $npath;

	push @pushlist, $npath;

	print "$path -> $npath\n";
    }
}

# Push the prebuilts to the server. !!! FIXME
system "rsync -av -e ssh @pushlist eelco\@losser.st-lab.cs.uu.nl:/home/eelco/public_html/nix-dist/";