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|
#! @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;
my %storePathsSeen;
foreach my $storePath (@storePaths) {
# $arg might be a symlink to the store, so resolve it.
my $storePath2 = (`$binDir/nix-store --query --resolve '$storePath'`
or die "cannot resolve `$storePath'");
chomp $storePath2;
# Get the closure of this path.
my $pid = open(READ,
"$binDir/nix-store --query --requisites '$storePath2'|") or die;
while (<READ>) {
chomp;
die "bad: $_" unless /^\//;
if (!defined $storePathsSeen{$_}) {
push @allStorePaths, $_;
$storePathsSeen{$_} = 1;
}
}
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;
my %storePathsSeen;
while (<READ>) {
chomp;
die "bad: $_" unless /^\//;
if (!defined $storePathsSeen{$_}) {
push @allStorePaths, $_;
$storePathsSeen{$_} = 1;
}
}
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: $?";
}
}
|
