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;