173 lines
4.2 KiB
Perl
173 lines
4.2 KiB
Perl
#! /usr/bin/perl -w
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use strict;
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use POSIX qw(tmpnam);
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my $tmpdir;
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do { $tmpdir = tmpnam(); }
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until mkdir $tmpdir, 0777;
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my $nixfile = "$tmpdir/create-nars.nix";
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my $manifest = "$tmpdir/MANIFEST";
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END { unlink $manifest; unlink $nixfile; rmdir $tmpdir; }
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my $curl = "curl --fail --silent";
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# Parse the command line.
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my $archives_put_url = shift @ARGV;
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my $archives_get_url = shift @ARGV;
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my $manifest_put_url = shift @ARGV;
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# From the given store expressions, determine the requisite store
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# paths.
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my %storepaths;
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foreach my $storeexpr (@ARGV) {
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die unless $storeexpr =~ /^\//;
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# Get all paths referenced by the normalisation of the given
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# Nix expression.
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system "nix-store --realise $storeexpr > /dev/null";
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die if ($?);
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open PATHS, "nix-store --query --requisites --include-successors $storeexpr 2> /dev/null |" or die;
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while (<PATHS>) {
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chomp;
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die "bad: $_" unless /^\//;
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$storepaths{$_} = "";
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}
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close PATHS;
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}
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my @storepaths = keys %storepaths;
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# For each path, create a Nix expression that turns the path into
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# a Nix archive.
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open NIX, ">$nixfile";
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print NIX "[";
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foreach my $storepath (@storepaths) {
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die unless ($storepath =~ /\/[0-9a-z]{32}.*$/);
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# Construct a Nix expression that creates a Nix archive.
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my $nixexpr =
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"((import @datadir@/nix/corepkgs/nar/nar.nix) " .
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# !!! $storepath should be represented as a closure
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"{path = \"$storepath\"; system = \"@system@\";}) ";
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print NIX $nixexpr;
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}
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print NIX "]";
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close NIX;
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# Instantiate store expressions from the Nix expression.
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my @storeexprs;
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print STDERR "instantiating store expressions...\n";
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open STOREEXPRS, "nix-instantiate $nixfile |" or die "cannot run nix-instantiate";
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while (<STOREEXPRS>) {
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chomp;
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die unless /^\//;
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push @storeexprs, $_;
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}
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close STOREEXPRS;
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# Realise the store expressions.
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print STDERR "creating archives...\n";
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my @narpaths;
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my @tmp = @storeexprs;
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while (scalar @tmp > 0) {
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my $n = scalar @tmp;
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if ($n > 256) { $n = 256 };
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my @tmp2 = @tmp[0..$n - 1];
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@tmp = @tmp[$n..scalar @tmp - 1];
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system "nix-store --realise -B @tmp2 > /dev/null";
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if ($?) { die "`nix-store --realise' failed"; }
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open NARPATHS, "nix-store --query --list @tmp2 |" or die "cannot run nix";
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while (<NARPATHS>) {
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chomp;
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die unless (/^\//);
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push @narpaths, "$_";
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}
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close NARPATHS;
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}
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# Create the manifest.
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print STDERR "creating manifest...\n";
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open MANIFEST, ">$manifest";
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my @nararchives;
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for (my $n = 0; $n < scalar @storepaths; $n++) {
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my $storepath = $storepaths[$n];
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my $nardir = $narpaths[$n];
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$storepath =~ /\/([^\/]*)$/;
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my $basename = $1;
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defined $basename or die;
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my $narname = "$basename.nar.bz2";
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my $narfile = "$nardir/$narname";
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(-f $narfile) or die "narfile for $storepath not found";
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push @nararchives, $narfile;
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open MD5, "$nardir/md5" or die "cannot open hash";
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my $hash = <MD5>;
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chomp $hash;
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$hash =~ /^[0-9a-z]{32}$/ or die "invalid hash";
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close MD5;
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print MANIFEST "{\n";
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print MANIFEST " StorePath: $storepath\n";
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print MANIFEST " NarURL: $archives_get_url/$narname\n";
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print MANIFEST " MD5: $hash\n";
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if ($storepath =~ /\.store$/) {
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open PREDS, "nix-store --query --predecessors $storepath |" or die "cannot run nix";
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while (<PREDS>) {
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chomp;
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die unless (/^\//);
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print MANIFEST " SuccOf: $_\n";
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}
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close PREDS;
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}
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print MANIFEST "}\n";
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}
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close MANIFEST;
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# Upload the archives.
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print STDERR "uploading archives...\n";
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foreach my $nararchive (@nararchives) {
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$nararchive =~ /\/([^\/]*)$/;
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my $basename = $1;
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if (system("$curl --head $archives_get_url/$basename > /dev/null") != 0) {
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print STDERR " $nararchive\n";
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system("$curl --show-error --upload-file " .
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"'$nararchive' '$archives_put_url/$basename' > /dev/null") == 0 or
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die "curl failed on $nararchive: $?";
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}
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}
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# Upload the manifest.
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print STDERR "uploading manifest...\n";
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system("$curl --show-error --upload-file " .
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"'$manifest' '$manifest_put_url/' > /dev/null") == 0 or
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die "curl failed on $manifest: $?";
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