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.)
105 lines
2.6 KiB
Plaintext
Executable file
105 lines
2.6 KiB
Plaintext
Executable file
#! @perl@ -w @perlFlags@
|
||
|
||
use Nix::SSH;
|
||
use Nix::Config;
|
||
use Nix::Store;
|
||
use Nix::CopyClosure;
|
||
|
||
|
||
if (scalar @ARGV < 1) {
|
||
print STDERR <<EOF
|
||
Usage: nix-copy-closure [--from | --to] HOSTNAME [--sign] [--gzip] PATHS...
|
||
EOF
|
||
;
|
||
exit 1;
|
||
}
|
||
|
||
|
||
# Get the target host.
|
||
my $sshHost;
|
||
|
||
my $sign = 0;
|
||
|
||
my $compressor = "";
|
||
my $decompressor = "";
|
||
|
||
my $toMode = 1;
|
||
|
||
my $includeOutputs = 0;
|
||
|
||
my $dryRun = 0;
|
||
|
||
|
||
# !!! Copied from nix-pack-closure, should put this in a module.
|
||
my @storePaths = ();
|
||
|
||
while (@ARGV) {
|
||
my $arg = shift @ARGV;
|
||
|
||
if ($arg eq "--sign") {
|
||
$sign = 1;
|
||
}
|
||
elsif ($arg eq "--gzip") {
|
||
$compressor = "gzip";
|
||
$decompressor = "gunzip";
|
||
}
|
||
elsif ($arg eq "--from") {
|
||
$toMode = 0;
|
||
}
|
||
elsif ($arg eq "--to") {
|
||
$toMode = 1;
|
||
}
|
||
elsif ($arg eq "--include-outputs") {
|
||
$includeOutputs = 1;
|
||
}
|
||
elsif ($arg eq "--dry-run") {
|
||
$dryRun = 1;
|
||
}
|
||
elsif (!defined $sshHost) {
|
||
$sshHost = $arg;
|
||
}
|
||
else {
|
||
push @storePaths, $arg;
|
||
}
|
||
}
|
||
|
||
|
||
openSSHConnection $sshHost or die "$0: unable to start SSH\n";
|
||
|
||
|
||
if ($toMode) { # Copy TO the remote machine.
|
||
Nix::CopyClosure::copyTo($sshHost, [ @sshOpts ], [ @storePaths ], $compressor, $decompressor, $includeOutputs, $dryRun, $sign);
|
||
}
|
||
|
||
else { # Copy FROM the remote machine.
|
||
|
||
# Query the closure of the given store paths on the remote
|
||
# machine. Paths are assumed to be store paths; there is no
|
||
# resolution (following of symlinks).
|
||
my $extraOpts = $includeOutputs ? "--include-outputs" : "";
|
||
my $pid = open(READ,
|
||
"set -f; ssh @sshOpts $sshHost nix-store --query --requisites $extraOpts @storePaths|") or die;
|
||
|
||
while (<READ>) {
|
||
chomp;
|
||
die "bad: $_" unless /^\//;
|
||
push @missing, $_ unless isValidPath($_);
|
||
}
|
||
|
||
close READ or die "nix-store on remote machine `$sshHost' failed: $?";
|
||
|
||
# Export the store paths on the remote machine and import them on locally.
|
||
if (scalar @missing > 0) {
|
||
print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
|
||
#print STDERR " $_\n" foreach @missing;
|
||
$compressor = "| $compressor" if $compressor ne "";
|
||
$decompressor = "$decompressor |" if $decompressor ne "";
|
||
unless ($dryRun) {
|
||
my $extraOpts = $sign ? "--sign" : "";
|
||
system("set -f; ssh $sshHost @sshOpts 'nix-store --export $extraOpts @missing $compressor' | $decompressor $Nix::Config::binDir/nix-store --import") == 0
|
||
or die "copying store paths from remote machine `$sshHost' failed: $?";
|
||
}
|
||
}
|
||
|
||
}
|