#! @perl@ -w @perlFlags@ use Nix::SSH; use Nix::Config; use Nix::Store; use Nix::CopyClosure; use List::Util qw(sum); if (scalar @ARGV < 1) { print STDERR <<EOF Usage: nix-copy-closure [--from | --to] HOSTNAME [--sign] [--gzip] [--bzip2] [--xz] PATHS... EOF ; exit 1; } # Get the target host. my $sshHost; my $sign = 0; my $compressor = ""; my $decompressor = ""; my $progressViewer = ""; my $toMode = 1; my $includeOutputs = 0; my $dryRun = 0; my $useSubstitutes = 0; # !!! Copied from nix-pack-closure, should put this in a module. my @storePaths = (); while (@ARGV) { my $arg = shift @ARGV; if ($arg eq "--help") { exec "man nix-copy-closure" or die; } elsif ($arg eq "--sign") { $sign = 1; } elsif ($arg eq "--gzip") { $compressor = "gzip"; $decompressor = "gunzip"; } elsif ($arg eq "--bzip2") { $compressor = "bzip2"; $decompressor = "bunzip2"; } elsif ($arg eq "--xz") { $compressor = "xz"; $decompressor = "xz -d"; } elsif ($arg eq "--from") { $toMode = 0; } elsif ($arg eq "--to") { $toMode = 1; } elsif ($arg eq "--include-outputs") { $includeOutputs = 1; } elsif ($arg eq "--show-progress") { $progressViewer = "@pv@"; } elsif ($arg eq "--dry-run") { $dryRun = 1; } elsif ($arg eq "--use-substitutes" || $arg eq "-s") { $useSubstitutes = 1; } elsif (!defined $sshHost) { $sshHost = $arg; } else { push @storePaths, $arg; } } die "$0: you did not specify a host name\n" unless defined $sshHost; 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, $progressViewer, $useSubstitutes); } 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: $?"; my $missingSize = 0; if ($progressViewer ne "") { $missingSize = sum (split ' ', `set -f; ssh @sshOpts $sshHost nix-store -q --size @missing`) or die; } # Export the store paths on the remote machine and import them locally. if (scalar @missing > 0) { print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n"; unless ($dryRun) { if ($useSubstitutes) { system "$Nix::Config::binDir/nix-store -r --ignore-unknown @missing"; } $compressor = "| $compressor" if $compressor ne ""; $decompressor = "$decompressor |" if $decompressor ne ""; $progressViewer = "$progressViewer -s $missingSize |" if $progressViewer ne ""; my $extraOpts = $sign ? "--sign" : ""; system("set -f; ssh $sshHost @sshOpts 'nix-store --export $extraOpts @missing $compressor' | $decompressor $progressViewer $Nix::Config::binDir/nix-store --import > /dev/null") == 0 or die "copying store paths from remote machine `$sshHost' failed: $?"; } } }