searchview: avoid uninitialized vals in %rmap_inc

Modules (e.g. `PublicInbox::Gcf2') may have an undef value in
the %rmap_inc hash table if an attempt has been made to load it
and failed due to a missing libgit2-dev dependency.  Avoid using
it in interpolation to avoid warnings.

diff --git a/lib/PublicInbox/SearchView.pm b/lib/PublicInbox/SearchView.pm
index 9919e25cb5cd6ce85ebe3f1c5c25d66a991041b1..9ce1b1eed8f7572ecb97cf63480274b149b8ff83 100644 (file)
--- a/lib/PublicInbox/SearchView.pm
+++ b/lib/PublicInbox/SearchView.pm
@@ -154,9 +154,15 @@ sub path2inc ($) {
        if (my $short = $rmap_inc{$full}) {
                return $short;
        } elsif (!scalar(keys %rmap_inc) && -e $full) {
-               %rmap_inc = map {; "$INC{$_}" => $_ } keys %INC;
+               # n.b. $INC{'PublicInbox::Gcf2'} is undef if libgit2-dev
+               # doesn't exist
+               my $f;
+               %rmap_inc = map {;
+                       $f = $INC{$_};
+                       defined $f ? ($f, $_) : ();
+               } keys %INC;
                # fall back to basename as last resort
-               $rmap_inc{$full} // (split('/', $full))[-1];
+               $rmap_inc{$full} // (split(m'/', $full))[-1];
        } else {
                $full;
        }