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nix-collect-garbage: Add --delete-older-than option

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This commit is contained in:
Ricardo M. Correia 2014-03-11 22:16:00 +01:00 committed by Eelco Dolstra
parent 7ef7597f71
commit 034b6f6062
2 changed files with 22 additions and 8 deletions
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18
doc/manual/nix-collect-garbage.xml
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@ -20,6 +20,7 @@
<command>nix-collect-garbage</command>
<arg><option>--delete-old</option></arg>
<arg><option>-d</option></arg>
<arg><option>--delete-older-than</option> <replaceable>period</replaceable></arg>
<group choice='opt'>
<arg choice='plain'><option>--print-roots</option></arg>
<arg choice='plain'><option>--print-live</option></arg>
@ -35,13 +36,18 @@
<para>The command <command>nix-collect-garbage</command> is mostly an
alias of <link linkend="rsec-nix-store-gc"><command>nix-store
--gc</command></link>, that is, it deletes all unreachable paths in
the Nix store to clean up your system. However, it provides an
additional option <option>-d</option> (<option>--delete-old</option>)
that deletes all old generations of all profiles in
the Nix store to clean up your system. However, it provides two
additional options: <option>-d</option> (<option>--delete-old</option>),
which deletes all old generations of all profiles in
<filename>/nix/var/nix/profiles</filename> by invoking
<literal>nix-env --delete-generations old</literal> on all profiles.
Of course, this makes rollbacks to previous configurations
impossible.</para>
<literal>nix-env --delete-generations old</literal> on all profiles
(of course, this makes rollbacks to previous configurations
impossible); and
<option>--delete-older-than</option> <replaceable>period</replaceable>,
where period is a value such as <literal>30d</literal>, which deletes
all non-current generations that are older than the specified number of
days in all profiles in <filename>/nix/var/nix/profiles</filename>.
</para>
</refsection>

12
scripts/nix-collect-garbage.in
View file

@ -8,12 +8,19 @@ my $profilesDir = "@localstatedir@/nix/profiles";
# Process the command line arguments.
my @args = ();
my $arg;
my $removeOld = 0;
my $gen;
my $dryRun = 0;
for my $arg (@ARGV) {
while ($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") {
@ -40,7 +47,8 @@ sub removeOldGenerations {
$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", "old", $dryRun ? "--dry-run" : ());
system("$Nix::Config::binDir/nix-env", "-p", $name, "--delete-generations", $gen, $dryRun ? "--dry-run" : ());
}
elsif (! -l $name && -d $name) {
removeOldGenerations $name;