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|
#! @perl@ -w @perlFlags@
use Nix::SSH;
use Nix::Config;
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;
# !!! 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 (!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.
my @allStorePaths;
# Get the closure of this path.
my $pid = open(READ, "set -f; $Nix::Config::binDir/nix-store --query --requisites @storePaths|") or die;
while (<READ>) {
chomp;
die "bad: $_" unless /^\//;
push @allStorePaths, $_;
}
close READ or die "nix-store failed: $?";
# Ask the remote host which paths are invalid.
open(READ, "set -f; ssh $sshHost @sshOpts nix-store --check-validity --print-invalid @allStorePaths|");
my @missing = ();
while (<READ>) {
chomp;
push @missing, $_;
}
close READ or die;
# Export the store paths and import them on the remote machine.
if (scalar @missing > 0) {
print STDERR "copying these missing paths:\n";
print STDERR " $_\n" foreach @missing;
my $extraOpts = "";
$extraOpts .= "--sign" if $sign == 1;
system("set -f; nix-store --export $extraOpts @missing $compressor | ssh $sshHost @sshOpts '$decompressor nix-store --import'") == 0
or die "copying store paths to remote machine `$sshHost' failed: $?";
}
}
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 $pid = open(READ,
"set -f; ssh @sshOpts $sshHost nix-store --query --requisites @storePaths|") or die;
my @allStorePaths;
while (<READ>) {
chomp;
die "bad: $_" unless /^\//;
push @allStorePaths, $_;
}
close READ or die "nix-store on remote machine `$sshHost' failed: $?";
# What paths are already valid locally?
open(READ, "set -f; @bindir@/nix-store --check-validity --print-invalid @allStorePaths|");
my @missing = ();
while (<READ>) {
chomp;
push @missing, $_;
}
close READ or die;
# Export the store paths on the remote machine and import them on locally.
if (scalar @missing > 0) {
print STDERR "copying these missing paths:\n";
print STDERR " $_\n" foreach @missing;
my $extraOpts = "";
$extraOpts .= "--sign" if $sign == 1;
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: $?";
}
}
|
