1 files changed, 131 insertions, 0 deletions
diff --git a/scripts/nix-copy-closure.in b/scripts/nix-copy-closure.in
new file mode 100755
index 000000000000..23d5619519a4
--- /dev/null
+++ b/scripts/nix-copy-closure.in
@@ -0,0 +1,131 @@
+#! @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: $?";
+        }
+    }
+
+}