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package Nix::CopyClosure;
use strict;
use Nix::Config;
use Nix::Store;
sub copyTo {
my ($sshHost, $sshOpts, $storePaths, $compressor, $decompressor,
$includeOutputs, $dryRun, $sign, $progressViewer, $useSubstitutes) = @_;
$compressor = "$compressor |" if $compressor ne "";
$decompressor = "$decompressor |" if $decompressor ne "";
$progressViewer = "$progressViewer |" if $progressViewer ne "";
# 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 = ();
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, $_;
}
close READ or die;
}
# Export the store paths and import them on the remote machine.
if (scalar @missing > 0) {
print STDERR "copying ", scalar @missing, " missing paths to ‘$sshHost’...\n";
unless ($dryRun) {
open SSH, "| $compressor $progressViewer 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;
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