024a8ed382
another machine through ssh. E.g.,
$ nix-copy-closure xyzzy $(which svn)
copies the closure of Subversion to machine `xyzzy'. This is like
`nix-pack-closure $(which svn) | ssh xyzzy', but it's much more
efficient since it only copies those paths that are missing on the
target machine.
55 lines
1.4 KiB
Text
55 lines
1.4 KiB
Text
#! @perl@ -w
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my $binDir = $ENV{"NIX_BIN_DIR"};
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$binDir = "@bindir@" unless defined $binDir;
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# Get the target host.
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my $sshHost = shift @ARGV;
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# !!! Copied from nix-pack-closure, should put this in a module.
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my %storePathsSeen;
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my @storePaths = ();
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while (@ARGV) {
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my $storePath = shift @ARGV;
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# $storePath might be a symlink to the store, so resolve it.
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$storePath = (`$binDir/nix-store --query --resolve '$storePath'`
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or die "cannot resolve `$storePath'");
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chomp $storePath;
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# Get the closure of this path.
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my $pid = open(READ,
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"$binDir/nix-store --query --requisites '$storePath'|") or die;
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while (<READ>) {
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chomp;
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die "bad: $_" unless /^\//;
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if (!defined $storePathsSeen{$_}) {
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push @storePaths, $_;
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$storePathsSeen{$_} = 1;
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}
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}
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close READ or die "nix-store failed: $?";
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}
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# Ask the remote host which paths are invalid.
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open(READ, "-|", "ssh", $sshHost, "nix-store", "--check-validity", "--print-invalid", @storePaths);
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my @missing = ();
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while (<READ>) {
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chomp;
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print STDERR "target needs $_\n";
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push @missing, $_;
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}
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close READ or die;
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# Export the store paths and import them on the remote machine.
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if (scalar @missing > 0) {
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system("nix-store --export @missing | ssh $sshHost nix-store --import") == 0
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or die "copying store paths to remote machine failed: $?";
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}
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