comments: collect metadata in a scan-phase preprocess hook

diff --git a/IkiWiki/Plugin/comments.pm b/IkiWiki/Plugin/comments.pm
index 9fb81d15aea5b22035e44ac42813c723caa5fc80..3ad2a0e13a2a51ffce1301e020687b4b0c6b36d3 100755 (executable)
--- a/IkiWiki/Plugin/comments.pm
+++ b/IkiWiki/Plugin/comments.pm
@@ -21,7 +21,8 @@ my %commentstate;
 sub import {
        hook(type => "checkconfig", id => 'comments',  call => \&checkconfig);
        hook(type => "getsetup", id => 'comments',  call => \&getsetup);
-       hook(type => "preprocess", id => 'comment', call => \&preprocess);
+       hook(type => "preprocess", id => 'comment', call => \&preprocess,
+               scan => 1);
        hook(type => "preprocess", id => 'commentmoderation', call => \&preprocess_moderation);
        # here for backwards compatability with old comments
        hook(type => "preprocess", id => '_comment', call => \&preprocess);
@@ -143,22 +144,27 @@ sub preprocess {
        }
        $content =~ s/\\"/"/g;
 
-       if ($config{comments_allowdirectives}) {
-               $content = IkiWiki::preprocess($page, $params{destpage},
-                       $content);
-       }
+       if (defined wantarray) {
+               if ($config{comments_allowdirectives}) {
+                       $content = IkiWiki::preprocess($page, $params{destpage},
+                               $content);
+               }
 
-       # no need to bother with htmlize if it's just HTML
-       $content = IkiWiki::htmlize($page, $params{destpage}, $format, $content)
-               if defined $format;
+               # no need to bother with htmlize if it's just HTML
+               $content = IkiWiki::htmlize($page, $params{destpage}, $format, $content)
+                       if defined $format;
 
-       IkiWiki::run_hooks(sanitize => sub {
-               $content = shift->(
-                       page => $page,
-                       destpage => $params{destpage},
-                       content => $content,
-               );
-       });
+               IkiWiki::run_hooks(sanitize => sub {
+                       $content = shift->(
+                               page => $page,
+                               destpage => $params{destpage},
+                               content => $content,
+                       );
+               });
+       }
+       else {
+               IkiWiki::preprocess($page, $params{destpage}, $content, 1);
+       }
 
        # set metadata, possibly overriding [[!meta]] directives from the
        # comment itself