#! @perl@ -w my $binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@"; 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 $sshHost; my @sshOpts = split ' ', ($ENV{"NIX_SSHOPTS"} or ""); my $sign = 0; my $compressor = "cat"; my $decompressor = "cat"; 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, $arg; } } if ($toMode) { # Copy TO the remote machine. my @allStorePaths; # Get the closure of this path. my $pid = open(READ, "$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, "ssh @sshOpts $sshHost nix-store --check-validity --print-invalid @allStorePaths|"); my @missing = (); while (<READ>) { chomp; print STDERR "target machine needs $_\n"; push @missing, $_; } close READ or die; # Export the store paths and import them on the remote machine. if (scalar @missing > 0) { my $extraOpts = ""; $extraOpts .= "--sign" if $sign == 1; system("nix-store --export $extraOpts @missing | $compressor | ssh @sshOpts $sshHost '$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, "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, "@bindir@/nix-store --check-validity --print-invalid @allStorePaths|"); my @missing = (); while (<READ>) { chomp; print STDERR "local machine needs $_\n"; push @missing, $_; } close READ or die; # Export the store paths on the remote machine and import them on locally. if (scalar @missing > 0) { my $extraOpts = ""; $extraOpts .= "--sign" if $sign == 1; system("ssh @sshOpts $sshHost 'nix-store --export $extraOpts @missing | $compressor' | $decompressor | @bindir@/nix-store --import") == 0 or die "copying store paths to remote machine `$sshHost' failed: $?"; } }