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|
#! @perl@ -w @perlFlags@
use strict;
use Nix::SSH;
use Nix::Config;
use Nix::Store;
use Nix::CopyClosure;
use List::Util qw(sum);
binmode STDERR, ":encoding(utf8)";
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 $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" || $arg eq "--bzip2" || $arg eq "--xz") {
warn "$0: ‘$arg’ is not implemented\n" if $arg ne "--gzip";
push @globalSshOpts, "-C";
}
elsif ($arg eq "--from") {
$toMode = 0;
}
elsif ($arg eq "--to") {
$toMode = 1;
}
elsif ($arg eq "--include-outputs") {
$includeOutputs = 1;
}
elsif ($arg eq "--show-progress") {
warn "$0: ‘$arg’ is not implemented\n";
}
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 $sshHost;
if ($toMode) { # Copy TO the remote machine.
Nix::CopyClosure::copyTo(
$sshHost, [ @sshOpts ], [ @storePaths ],
$includeOutputs, $dryRun, $sign, $useSubstitutes);
}
else { # Copy FROM the remote machine.
my ($from, $to) = connectToRemoteNix($sshHost, [ @sshOpts ]);
# 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).
syswrite($to, pack("L<x4L<x4", 7, $includeOutputs ? 1 : 0)) or die;
writeStrings(\@storePaths, $to);
my @missing = grep { !isValidPath($_) } readStrings($from);
# Export the store paths on the remote machine and import them locally.
if (scalar @missing > 0) {
print STDERR "copying ", scalar @missing, " missing paths from ‘$sshHost’...\n";
writeInt(5, $to); # == cmdExportPaths
writeInt($sign ? 1 : 0, $to);
writeStrings(\@missing, $to);
importPaths(fileno($from));
}
}
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