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https://github.com/NixOS/nix.git
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104 lines
2.5 KiB
Plaintext
Executable File
104 lines
2.5 KiB
Plaintext
Executable File
#! @perl@ -w @perlFlags@
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use utf8;
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use strict;
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use Nix::SSH;
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use Nix::Config;
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use Nix::Store;
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use Nix::CopyClosure;
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use List::Util qw(sum);
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binmode STDERR, ":encoding(utf8)";
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if (scalar @ARGV < 1) {
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print STDERR <<EOF
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Usage: nix-copy-closure [--from | --to] HOSTNAME [--gzip] [--bzip2] [--xz] PATHS...
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EOF
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;
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exit 1;
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}
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# Get the target host.
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my $sshHost;
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my $toMode = 1;
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my $includeOutputs = 0;
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my $dryRun = 0;
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my $useSubstitutes = 0;
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my $verbosity = 1;
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# !!! Copied from nix-pack-closure, should put this in a module.
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my @storePaths = ();
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while (@ARGV) {
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my $arg = shift @ARGV;
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if ($arg eq "--help") {
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exec "man nix-copy-closure" or die;
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}
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elsif ($arg eq "--gzip" || $arg eq "--bzip2" || $arg eq "--xz") {
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warn "$0: ‘$arg’ is not implemented\n" if $arg ne "--gzip";
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push @globalSshOpts, "-C";
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}
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elsif ($arg eq "--from") {
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$toMode = 0;
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}
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elsif ($arg eq "--to") {
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$toMode = 1;
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}
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elsif ($arg eq "--include-outputs") {
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$includeOutputs = 1;
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}
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elsif ($arg eq "--show-progress") {
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warn "$0: ‘$arg’ is not implemented\n";
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}
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elsif ($arg eq "--dry-run") {
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$dryRun = 1;
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}
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elsif ($arg eq "--use-substitutes" || $arg eq "-s") {
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$useSubstitutes = 1;
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}
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elsif ($arg eq "-v") {
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$verbosity++;
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setVerbosity($verbosity);
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}
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elsif (!defined $sshHost) {
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$sshHost = $arg;
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}
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else {
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push @storePaths, $arg;
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}
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}
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die "$0: you did not specify a host name\n" unless defined $sshHost;
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if ($toMode) { # Copy TO the remote machine.
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Nix::CopyClosure::copyTo(
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$sshHost, [ @storePaths ],
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$includeOutputs, $dryRun, $useSubstitutes);
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}
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else { # Copy FROM the remote machine.
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my ($from, $to) = connectToRemoteNix($sshHost, []);
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# Query the closure of the given store paths on the remote
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# machine. Paths are assumed to be store paths; there is no
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# resolution (following of symlinks).
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syswrite($to, pack("L<x4L<x4", 7, $includeOutputs ? 1 : 0)) or die;
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writeStrings(\@storePaths, $to);
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my @missing = grep { !isValidPath($_) } readStrings($from);
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# Export the store paths on the remote machine and import them locally.
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if (scalar @missing > 0) {
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print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
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writeInt(5, $to); # == cmdExportPaths
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writeInt(0, $to); # obsolete
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writeStrings(\@missing, $to);
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importPaths(fileno($from), 1);
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}
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}
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