mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-30 09:36:15 +02:00
5bbd693cae
‘nix-store --export’. * Add a Perl module that provides the functionality of ‘nix-copy-closure --to’. This is used by build-remote.pl so it no longer needs to start a separate nix-copy-closure process. Also, it uses the Perl API to do the export, so it doesn't need to start a separate nix-store process either. As a result, nix-copy-closure and build-remote.pl should no longer fail on very large closures due to an "Argument list too long" error. (Note that having very many dependencies in a single derivation can still fail because the environment can become too large. Can't be helped though.)
46 lines
1.6 KiB
Perl
46 lines
1.6 KiB
Perl
package Nix::CopyClosure;
|
||
|
||
use strict;
|
||
use Nix::Config;
|
||
use Nix::Store;
|
||
|
||
|
||
sub copyTo {
|
||
my ($sshHost, $sshOpts, $storePaths, $compressor, $decompressor, $includeOutputs, $dryRun, $sign) = @_;
|
||
|
||
$compressor = "$compressor |" if $compressor ne "";
|
||
$decompressor = "$decompressor |" if $decompressor ne "";
|
||
|
||
# Get the closure of this path.
|
||
my @closure = reverse(topoSortPaths(computeFSClosure(0, $includeOutputs,
|
||
map { followLinksToStorePath $_ } @{$storePaths})));
|
||
|
||
# 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";
|
||
#print STDERR " $_\n" foreach @missing;
|
||
unless ($dryRun) {
|
||
open SSH, "| $compressor ssh $sshHost @{$sshOpts} '$decompressor nix-store --import'" or die;
|
||
exportPaths(fileno(SSH), $sign, @missing);
|
||
close SSH or die "copying store paths to remote machine `$sshHost' failed: $?";
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
1;
|