nix-super/scripts/nix-push.in

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#! /usr/bin/perl -w
use strict;
use POSIX qw(tmpnam);
my $tmpdir;
do { $tmpdir = tmpnam(); }
until mkdir $tmpdir, 0777;
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my $nixfile = "$tmpdir/create-nars.nix";
my $manifest = "$tmpdir/MANIFEST";
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END { unlink $manifest; unlink $nixfile; rmdir $tmpdir; }
my @paths;
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foreach my $id (@ARGV) {
die unless $id =~ /^\//;
# Get all paths referenced by the normalisation of the given
# Nix expression.
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system "nix-store --realise $id > /dev/null";
die if ($?);
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open PATHS, "nix-store --query --requisites --include-successors $id 2> /dev/null |" or die;
while (<PATHS>) {
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chomp;
die "bad: $_" unless /^\//;
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push @paths, $_;
}
close PATHS;
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}
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# For each path, create a Nix expression that turns the path into
# a Nix archive.
open NIX, ">$nixfile";
print NIX "[";
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foreach my $path (@paths) {
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die unless ($path =~ /\/[0-9a-z]{32}.*$/);
print "$path\n";
# Construct a Nix expression that creates a Nix archive.
my $nixexpr =
"((import @datadir@/nix/corepkgs/nar/nar.nix) " .
# !!! $path should be represented as a closure
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"{path = \"$path\"; system = \"@system@\";}) ";
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print NIX $nixexpr;
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}
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print NIX "]";
close NIX;
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# Instantiate a store expression from the Nix expression.
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my @nids;
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print STDERR "instantiating Nix expression...\n";
open NIDS, "nix-instantiate $nixfile |" or die "cannot run nix-instantiate";
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while (<NIDS>) {
chomp;
die unless /^\//;
push @nids, $_;
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print "$_\n";
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}
close NIDS;
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# Realise the store expression.
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print STDERR "creating archives...\n";
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system "nix-store --realise -v @nids > /dev/null";
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if ($?) { die "`nix-store --realise' failed"; }
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my @narpaths;
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open NIDS, "nix-store --query --list @nids |" or die "cannot run nix";
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while (<NIDS>) {
chomp;
die unless (/^\//);
push @narpaths, "$_";
}
close NIDS;
# Create the manifest.
print STDERR "creating manifest...\n";
open MANIFEST, ">$manifest";
my @pushlist;
push @pushlist, $manifest;
for (my $n = 0; $n < scalar @paths; $n++) {
my $storepath = $paths[$n];
my $nardir = $narpaths[$n];
$storepath =~ /\/([^\/]*)$/;
my $basename = $1;
defined $basename or die;
my $narname = "$basename.nar.bz2";
my $narfile = "$nardir/$narname";
(-f $narfile) or die "narfile for $storepath not found";
push @pushlist, $narfile;
open MD5, "$nardir/md5" or die "cannot open hash";
my $hash = <MD5>;
chomp $hash;
$hash =~ /^[0-9a-z]{32}$/ or die "invalid hash";
close MD5;
print MANIFEST "{\n";
print MANIFEST " StorePath: $storepath\n";
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print MANIFEST " NarName: $narname\n";
print MANIFEST " MD5: $hash\n";
if ($storepath =~ /\.nix$/) {
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open PREDS, "nix-store --query --predecessors $storepath |" or die "cannot run nix";
while (<PREDS>) {
chomp;
die unless (/^\//);
print MANIFEST " SuccOf: $_\n";
}
close PREDS;
}
print MANIFEST "}\n";
}
close MANIFEST;
# Push the prebuilts to the server. !!! FIXME
print STDERR "pushing to server...\n";
if (scalar @pushlist > 0) {
system "rsync -av -e ssh @pushlist eelco\@losser.st-lab.cs.uu.nl:/home/eelco/public_html/nix-dist/";
}