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#! @perl@ -w @perlFlags@
use strict;
use Nix::Config;
my $profilesDir = "@localstatedir@/nix/profiles";
# Process the command line arguments.
my @args = ();
my $arg;
my $removeOld = 0;
my $gen;
my $dryRun = 0;
while ($arg = shift) {
if ($arg eq "--delete-old" || $arg eq "-d") {
$removeOld = 1;
$gen = "old";
} elsif ($arg eq "--delete-older-than") {
$removeOld = 1;
$gen = shift;
} elsif ($arg eq "--dry-run") {
$dryRun = 1;
} elsif ($arg eq "--help") {
exec "man nix-collect-garbage" or die;
} 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.
sub removeOldGenerations;
sub removeOldGenerations {
my $dir = shift;
my $dh;
opendir $dh, $dir or die;
foreach my $name (sort (readdir $dh)) {
next if $name eq "." || $name eq "..";
$name = $dir . "/" . $name;
if (-l $name && (readlink($name) =~ /link/)) {
print STDERR "removing old generations of profile $name\n";
system("$Nix::Config::binDir/nix-env", "-p", $name, "--delete-generations", $gen, $dryRun ? "--dry-run" : ());
}
elsif (! -l $name && -d $name) {
removeOldGenerations $name;
}
}
closedir $dh or die;
}
removeOldGenerations $profilesDir if $removeOld;
# Run the actual garbage collector.
exec "$Nix::Config::binDir/nix-store", "--gc", @args unless $dryRun;
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