* Look for GC roots in @localstatedir@/nix/gcroots.
This commit is contained in:
parent
d7238bc84e
commit
759c953196
2 changed files with 58 additions and 20 deletions
|
@ -19,8 +19,12 @@ init-state:
|
||||||
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/db
|
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/db
|
||||||
$(INSTALL) -d $(DESTDIR)$(localstatedir)/log/nix
|
$(INSTALL) -d $(DESTDIR)$(localstatedir)/log/nix
|
||||||
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/profiles
|
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/profiles
|
||||||
|
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/gcroots
|
||||||
|
$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/gcroots/tmp
|
||||||
|
rm -f $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
|
||||||
|
ln -s $(localstatedir)/nix/profiles $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
|
||||||
$(INSTALL) -d $(DESTDIR)$(prefix)/store
|
$(INSTALL) -d $(DESTDIR)$(prefix)/store
|
||||||
# $(bindir)/nix-store --init
|
# $(bindir)/nix-store --init
|
||||||
else
|
else
|
||||||
init-state:
|
init-state:
|
||||||
endif
|
endif
|
||||||
|
|
|
@ -3,41 +3,74 @@
|
||||||
use strict;
|
use strict;
|
||||||
use IPC::Open2;
|
use IPC::Open2;
|
||||||
|
|
||||||
my $linkdir = "@localstatedir@/nix/profiles";
|
my $rootsDir = "@localstatedir@/nix/gcroots";
|
||||||
my $storedir = "@storedir@";
|
my $storeDir = "@storedir@";
|
||||||
|
|
||||||
my %alive;
|
my %alive;
|
||||||
|
|
||||||
my $keepsuccessors = 1;
|
my $keepSuccessors = 1;
|
||||||
my $invert = 0;
|
my $invert = 0;
|
||||||
|
|
||||||
|
my @roots = ();
|
||||||
|
|
||||||
|
|
||||||
|
# Parse the command line.
|
||||||
foreach my $arg (@ARGV) {
|
foreach my $arg (@ARGV) {
|
||||||
if ($arg eq "--no-successors") { $keepsuccessors = 0; }
|
if ($arg eq "--no-successors") { $keepSuccessors = 0; }
|
||||||
elsif ($arg eq "--invert") { $invert = 1; }
|
elsif ($arg eq "--invert") { $invert = 1; }
|
||||||
else { die "unknown argument `$arg'" };
|
else { die "unknown argument `$arg'" };
|
||||||
}
|
}
|
||||||
|
|
||||||
opendir(DIR, $linkdir) or die "cannot open directory $linkdir: $!";
|
|
||||||
my @links = readdir DIR or die "cannot read directory $linkdir: $!";
|
|
||||||
closedir DIR;
|
|
||||||
|
|
||||||
my @roots;
|
# Read all GC roots from the given file.
|
||||||
foreach my $link (@links) {
|
sub readRoots {
|
||||||
$link = $linkdir . "/" . $link;
|
my $fileName = shift;
|
||||||
next if (!($link =~ /.gcroot$/));
|
open ROOT, "<$fileName" or die "cannot open `$fileName': $!";
|
||||||
open ROOT, "<$link" or die "cannot open $link: $!";
|
|
||||||
while (<ROOT>) {
|
while (<ROOT>) {
|
||||||
chomp;
|
chomp;
|
||||||
foreach my $root (split ' ') {
|
foreach my $root (split ' ') {
|
||||||
die "bad root `$root' in file `$link'" unless $root =~ /^\S+$/;
|
die "bad root `$root' in file `$fileName'"
|
||||||
|
unless $root =~ /^\S+$/;
|
||||||
push @roots, $root;
|
push @roots, $root;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
close ROOT;
|
close ROOT;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
# Recursively finds all *.gcroot files in the given directory.
|
||||||
|
sub findRoots;
|
||||||
|
sub findRoots {
|
||||||
|
my $followSymlinks = shift;
|
||||||
|
my $dir = shift;
|
||||||
|
|
||||||
|
opendir(DIR, $dir) or die "cannot open directory `$dir': $!";
|
||||||
|
my @names = readdir DIR or die "cannot read directory `$dir': $!";
|
||||||
|
closedir DIR;
|
||||||
|
|
||||||
|
foreach my $name (@names) {
|
||||||
|
next if $name eq "." || $name eq "..";
|
||||||
|
$name = $dir . "/" . $name;
|
||||||
|
if ($name =~ /.gcroot$/ && -f $name) {
|
||||||
|
readRoots $name;
|
||||||
|
}
|
||||||
|
elsif (-d $name) {
|
||||||
|
if ($followSymlinks || !-l $name) {
|
||||||
|
findRoots 0, $name;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
# Find GC roots, starting at $rootsDir.
|
||||||
|
findRoots 1, $rootsDir;
|
||||||
|
|
||||||
|
|
||||||
|
# Determine all store paths reachable from the roots.
|
||||||
my $extraarg = "";
|
my $extraarg = "";
|
||||||
if ($keepsuccessors) { $extraarg = "--include-successors"; };
|
if ($keepSuccessors) { $extraarg = "--include-successors"; };
|
||||||
my $pid = open2(\*READ, \*WRITE, "@bindir@/nix-store --query --requisites $extraarg @roots")
|
my $pid = open2(\*READ, \*WRITE, "@bindir@/nix-store --query --requisites $extraarg @roots")
|
||||||
or die "determining live paths";
|
or die "determining live paths";
|
||||||
close WRITE;
|
close WRITE;
|
||||||
|
@ -53,14 +86,15 @@ $? == 0 or die "determining live paths";
|
||||||
|
|
||||||
exit 0 if ($invert);
|
exit 0 if ($invert);
|
||||||
|
|
||||||
opendir(DIR, $storedir) or die "cannot open directory $storedir: $!";
|
|
||||||
my @names = readdir DIR;
|
|
||||||
closedir DIR;
|
|
||||||
|
|
||||||
foreach my $name (@names) {
|
# Using that information, find all store paths *not* reachable from
|
||||||
|
# the roots.
|
||||||
|
opendir(DIR, $storeDir) or die "cannot open directory $storeDir: $!";
|
||||||
|
foreach my $name (readdir DIR) {
|
||||||
next if ($name eq "." || $name eq "..");
|
next if ($name eq "." || $name eq "..");
|
||||||
$name = "$storedir/$name";
|
$name = "$storeDir/$name";
|
||||||
if (!$alive{$name}) {
|
if (!$alive{$name}) {
|
||||||
print "$name\n";
|
print "$name\n";
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
closedir DIR;
|
||||||
|
|
Loading…
Reference in a new issue