forked from lix-project/lix
130 lines
3.5 KiB
Plaintext
Executable file
130 lines
3.5 KiB
Plaintext
Executable file
#! @perl@ -w @perlFlags@
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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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if (scalar @ARGV < 1) {
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print STDERR <<EOF
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Usage: nix-copy-closure [--from | --to] HOSTNAME [--sign] [--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 $sign = 0;
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my $compressor = "";
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my $decompressor = "";
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my $progressViewer = "";
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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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# !!! 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 ($arg eq "--sign") {
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$sign = 1;
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}
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elsif ($arg eq "--gzip") {
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$compressor = "gzip";
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$decompressor = "gunzip";
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}
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elsif ($arg eq "--bzip2") {
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$compressor = "bzip2";
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$decompressor = "bunzip2";
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}
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elsif ($arg eq "--xz") {
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$compressor = "xz";
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$decompressor = "xz -d";
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}
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elsif ($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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$progressViewer = "pv";
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}
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elsif ($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 (!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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openSSHConnection $sshHost or die "$0: unable to start SSH\n";
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if ($toMode) { # Copy TO the remote machine.
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Nix::CopyClosure::copyTo(
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$sshHost, [ @sshOpts ], [ @storePaths ], $compressor, $decompressor,
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$includeOutputs, $dryRun, $sign, $progressViewer, $useSubstitutes);
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}
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else { # Copy FROM the remote machine.
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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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my $extraOpts = $includeOutputs ? "--include-outputs" : "";
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my $pid = open(READ,
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"set -f; ssh @sshOpts $sshHost nix-store --query --requisites $extraOpts @storePaths|") or die;
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while (<READ>) {
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chomp;
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die "bad: $_" unless /^\//;
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push @missing, $_ unless isValidPath($_);
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}
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close READ or die "nix-store on remote machine `$sshHost' failed: $?";
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my $missingSize = 0;
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if ($progressViewer ne "") {
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$missingSize = sum (split ' ', `set -f; ssh @sshOpts $sshHost nix-store -q --size @missing`) or die;
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}
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# Export the store paths on the remote machine and import them locally.
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if (scalar @missing > 0) {
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print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
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unless ($dryRun) {
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if ($useSubstitutes) {
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system "$Nix::Config::binDir/nix-store -r --ignore-unknown @missing";
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}
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$compressor = "| $compressor" if $compressor ne "";
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$decompressor = "$decompressor |" if $decompressor ne "";
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$progressViewer = "$progressViewer -s $missingSize |" if $progressViewer ne "";
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my $extraOpts = $sign ? "--sign" : "";
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system("set -f; ssh $sshHost @sshOpts 'nix-store --export $extraOpts @missing $compressor' | $progressViewer $decompressor $Nix::Config::binDir/nix-store --import > /dev/null") == 0
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or die "copying store paths from remote machine `$sshHost' failed: $?";
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}
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}
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}
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