www_stream: use DESTROY to cleanup temporary gits

Relying on a timer to handle cleanup in f9ac22a4b485 was
sub-optimal since the delay could prove expensive under heavy
traffic.  So rely on ->DESTROY instead since we we no longer
hold reference cycles by the time the show_blob callback
executes.

Fixes: f9ac22a4b485 ("git_async_cat: automatically cleanup temporary gits")

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/PublicInbox/ViewVCS.pm b/lib/PublicInbox/ViewVCS.pm
index 915cf2c5..b0f58455 100644
--- a/lib/PublicInbox/ViewVCS.pm
+++ b/lib/PublicInbox/ViewVCS.pm
@@ -414,6 +414,7 @@ blob $oid $size bytes $raw_link</pre>
 EOM
         }
         @{$ctx->{-paths}} = ($path, $raw_link);
+        bless $ctx, 'PublicInbox::WwwStream'; # for DESTROY
         $ctx->{git} = $git;
         if ($ctx->{env}->{'pi-httpd.async'}) {
                 ibx_async_cat($ctx, $oid, \&show_blob, $ctx);