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lix/scripts/nix-collect-garbage.in

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#! @perl@ -w
use strict;
my $profilesDir = "@localstatedir@/nix/profiles";
# Process the command line arguments.
my @args = ();
my $removeOld = 0;
for my $arg (@ARGV) {
if ($arg eq "--delete-old" || $arg eq "-d") {
$removeOld = 1;
} else {
push @args, $arg;
}
}
# If `-d' was specified, remove all old generations of all profiles.
# Of course, this makes rollbacks to before this point in time
# impossible.
if ($removeOld) {
opendir DIR, $profilesDir or die;
foreach my $name (sort (readdir DIR)) {
$name = $profilesDir . "/" . $name;
if (-l $name && (readlink($name) =~ /link/)) {
print STDERR "removing old generations of profile $name\n";
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system("@bindir@/nix-env", "-p", $name, "--delete-generations", "old");
}
}
closedir DIR or die;
}
# Run the actual garbage collector.
exec "@bindir@/nix-store", "--gc", @args;