diff options
Diffstat (limited to 'scripts/nix-switch')
| -rwxr-xr-x | scripts/nix-switch | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/scripts/nix-switch b/scripts/nix-switch index 74bcef8566f9..aec61cbfe147 100755 --- a/scripts/nix-switch +++ b/scripts/nix-switch @@ -20,11 +20,17 @@ chomp $id; my $nr = 0; while (-e "$linkdir/$id-$nr") { $nr++; } my $link = "$linkdir/$id-$nr"; -print "$pkgdir\n"; # Create a symlink from $link to $pkgdir. symlink($pkgdir, $link) or die "cannot create $link"; +# Also store the hash of $pkgdir. This is useful for garbage +# collection and the like. +my $hashfile = "$linkdir/$id-$nr.hash"; +open HASH, "> $hashfile" or die "cannot create $hashfile"; +print HASH "$hash\n"; +close HASH; + # Make $link the current generation by pointing $linkdir/current to # it. The rename() system call is supposed to be essentially atomic # on Unix. That is, if we have links `current -> X' and `new_current |