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https://github.com/NixOS/nix.git
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a562d544d8
I.e. do what git does. I'm too lazy to keep the builtin help text up to date :-) Also add ‘--help’ to various commands that lacked it (e.g. nix-collect-garbage).
58 lines
1.4 KiB
Plaintext
Executable File
58 lines
1.4 KiB
Plaintext
Executable File
#! @perl@ -w @perlFlags@
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use strict;
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use Nix::Config;
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my $profilesDir = "@localstatedir@/nix/profiles";
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# Process the command line arguments.
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my @args = ();
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my $removeOld = 0;
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my $dryRun = 0;
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for my $arg (@ARGV) {
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if ($arg eq "--delete-old" || $arg eq "-d") {
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$removeOld = 1;
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} elsif ($arg eq "--dry-run") {
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$dryRun = 1;
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} elsif ($arg eq "--help") {
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exec "man nix-collect-garbage" or die;
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} else {
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push @args, $arg;
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}
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}
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# If `-d' was specified, remove all old generations of all profiles.
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# Of course, this makes rollbacks to before this point in time
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# impossible.
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sub removeOldGenerations;
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sub removeOldGenerations {
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my $dir = shift;
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my $dh;
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opendir $dh, $dir or die;
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foreach my $name (sort (readdir $dh)) {
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next if $name eq "." || $name eq "..";
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$name = $dir . "/" . $name;
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if (-l $name && (readlink($name) =~ /link/)) {
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print STDERR "removing old generations of profile $name\n";
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system("$Nix::Config::binDir/nix-env", "-p", $name, "--delete-generations", "old", $dryRun ? "--dry-run" : ());
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}
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elsif (! -l $name && -d $name) {
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removeOldGenerations $name;
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}
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}
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closedir $dh or die;
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}
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removeOldGenerations $profilesDir if $removeOld;
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# Run the actual garbage collector.
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exec "$Nix::Config::binDir/nix-store", "--gc", @args unless $dryRun;
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