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|
#! /usr/bin/perl -w
use strict;
use POSIX qw(tmpnam);
my $tmpdir;
do { $tmpdir = tmpnam(); }
until mkdir $tmpdir, 0777;
my $nixfile = "$tmpdir/create-nars.nix";
my $manifest = "$tmpdir/MANIFEST";
END { unlink $manifest; unlink $nixfile; rmdir $tmpdir; }
my $curl = "curl --fail --silent";
# Parse the command line.
my $archives_put_url = shift @ARGV;
my $archives_get_url = shift @ARGV;
my $manifest_put_url = shift @ARGV;
# From the given store expressions, determine the requisite store
# paths.
my %storepaths;
foreach my $storeexpr (@ARGV) {
die unless $storeexpr =~ /^\//;
# Get all paths referenced by the normalisation of the given
# Nix expression.
system "nix-store --realise $storeexpr > /dev/null";
die if ($?);
open PATHS, "nix-store --query --requisites --include-successors $storeexpr 2> /dev/null |" or die;
while (<PATHS>) {
chomp;
die "bad: $_" unless /^\//;
$storepaths{$_} = "";
}
close PATHS;
}
my @storepaths = keys %storepaths;
# For each path, create a Nix expression that turns the path into
# a Nix archive.
open NIX, ">$nixfile";
print NIX "[";
foreach my $storepath (@storepaths) {
die unless ($storepath =~ /\/[0-9a-z]{32}.*$/);
# Construct a Nix expression that creates a Nix archive.
my $nixexpr =
"((import @datadir@/nix/corepkgs/nar/nar.nix) " .
# !!! $storepath should be represented as a closure
"{path = \"$storepath\"; system = \"@system@\";}) ";
print NIX $nixexpr;
}
print NIX "]";
close NIX;
# Instantiate store expressions from the Nix expression.
my @storeexprs;
print STDERR "instantiating store expressions...\n";
open STOREEXPRS, "nix-instantiate $nixfile |" or die "cannot run nix-instantiate";
while (<STOREEXPRS>) {
chomp;
die unless /^\//;
push @storeexprs, $_;
}
close STOREEXPRS;
# Realise the store expressions.
print STDERR "creating archives...\n";
my @narpaths;
my @tmp = @storeexprs;
while (scalar @tmp > 0) {
my $n = scalar @tmp;
if ($n > 256) { $n = 256 };
my @tmp2 = @tmp[0..$n - 1];
@tmp = @tmp[$n..scalar @tmp - 1];
system "nix-store --realise -B @tmp2 > /dev/null";
if ($?) { die "`nix-store --realise' failed"; }
open NARPATHS, "nix-store --query --list @tmp2 |" or die "cannot run nix";
while (<NARPATHS>) {
chomp;
die unless (/^\//);
push @narpaths, "$_";
}
close NARPATHS;
}
# Create the manifest.
print STDERR "creating manifest...\n";
open MANIFEST, ">$manifest";
my @nararchives;
for (my $n = 0; $n < scalar @storepaths; $n++) {
my $storepath = $storepaths[$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 @nararchives, $narfile;
open MD5, "$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";
print MANIFEST " NarURL: $archives_get_url/$narname\n";
print MANIFEST " MD5: $hash\n";
if ($storepath =~ /\.store$/) {
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;
# Upload the archives.
print STDERR "uploading archives...\n";
foreach my $nararchive (@nararchives) {
$nararchive =~ /\/([^\/]*)$/;
my $basename = $1;
if (system("$curl --head $archives_get_url/$basename > /dev/null") != 0) {
print STDERR " $nararchive\n";
system("$curl --show-error --upload-file " .
"'$nararchive' '$archives_put_url/$basename' > /dev/null") == 0 or
die "curl failed on $nararchive: $?";
}
}
# Upload the manifest.
print STDERR "uploading manifest...\n";
system("$curl --show-error --upload-file " .
"'$manifest' '$manifest_put_url' > /dev/null") == 0 or
die "curl failed on $manifest: $?";
|
