support altid mechanism for v2

There's enough gmane links out there in wild that it makes sense
to maintain support for these mappings.

1 files changed, 17 insertions, 3 deletions

diff --git a/lib/PublicInbox/AltId.pm b/lib/PublicInbox/AltId.pm
index d1b2dc24..f8aa4cb8 100644
--- a/lib/PublicInbox/AltId.pm
+++ b/lib/PublicInbox/AltId.pm
@@ -22,17 +22,31 @@ sub new {
         } split(/[&;]/, $query);
         my $f = $params{file} or die "file: required for $type spec $spec\n";
         unless (index($f, '/') == 0) {
-                $f = "$inbox->{mainrepo}/public-inbox/$f";
+                if (($inbox->{version} || 1) == 1) {
+                        $f = "$inbox->{mainrepo}/public-inbox/$f";
+                } else {
+                        $f = "$inbox->{mainrepo}/$f";
+                }
         }
         bless {
-                mm_alt => PublicInbox::Msgmap->new_file($f, $writable),
+                filename => $f,
+                writable => $writable,
                 xprefix => 'X'.uc($prefix),
         }, $class;
 }
 
+sub mm_alt {
+        my ($self) = @_;
+        $self->{mm_alt} ||= eval {
+                my $f = $self->{filename};
+                my $writable = $self->{filename};
+                PublicInbox::Msgmap->new_file($f, $writable);
+        };
+}
+
 sub mid2alt {
         my ($self, $mid) = @_;
-        $self->{mm_alt}->num_for($mid);
+        $self->mm_alt->num_for($mid);
 }
 
 1;