mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-14 02:06:16 +02:00
57 lines
2.1 KiB
Perl
57 lines
2.1 KiB
Perl
package Nix::CopyClosure;
|
||
|
||
use strict;
|
||
use Nix::Config;
|
||
use Nix::Store;
|
||
use List::Util qw(sum);
|
||
|
||
|
||
sub copyTo {
|
||
my ($sshHost, $sshOpts, $storePaths, $compressor, $decompressor,
|
||
$includeOutputs, $dryRun, $sign, $progressViewer, $useSubstitutes) = @_;
|
||
|
||
# Get the closure of this path.
|
||
my @closure = reverse(topoSortPaths(computeFSClosure(0, $includeOutputs,
|
||
map { followLinksToStorePath $_ } @{$storePaths})));
|
||
|
||
# Optionally use substitutes on the remote host.
|
||
if (!$dryRun && $useSubstitutes) {
|
||
system "ssh $sshHost @{$sshOpts} nix-store -r --ignore-unknown @closure";
|
||
# Ignore exit status because this is just an optimisation.
|
||
}
|
||
|
||
# Ask the remote host which paths are invalid. Because of limits
|
||
# to the command line length, do this in chunks. Eventually,
|
||
# we'll want to use ‘--from-stdin’, but we can't rely on the
|
||
# target having this option yet.
|
||
my @missing = ();
|
||
my $missingSize = 0;
|
||
while (scalar(@closure) > 0) {
|
||
my @ps = splice(@closure, 0, 1500);
|
||
open(READ, "set -f; ssh $sshHost @{$sshOpts} nix-store --check-validity --print-invalid @ps|");
|
||
while (<READ>) {
|
||
chomp;
|
||
push @missing, $_;
|
||
my ($deriver, $narHash, $time, $narSize, $refs) = queryPathInfo($_, 1);
|
||
$missingSize += $narSize;
|
||
}
|
||
close READ or die;
|
||
}
|
||
|
||
$compressor = "$compressor |" if $compressor ne "";
|
||
$decompressor = "$decompressor |" if $decompressor ne "";
|
||
$progressViewer = "$progressViewer -s $missingSize |" if $progressViewer ne "";
|
||
|
||
# Export the store paths and import them on the remote machine.
|
||
if (scalar @missing > 0) {
|
||
print STDERR "copying ", scalar @missing, " missing paths to ‘$sshHost’...\n";
|
||
unless ($dryRun) {
|
||
open SSH, "| $progressViewer $compressor ssh $sshHost @{$sshOpts} '$decompressor nix-store --import' > /dev/null" or die;
|
||
exportPaths(fileno(SSH), $sign, @missing);
|
||
close SSH or die "copying store paths to remote machine `$sshHost' failed: $?";
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
1;
|