add_depends: optimise influence calculation

I made match_* functions whose influences can vary depending on the page
matched set a special "" influence to indicate this.

Then add_depends can try just one page, and if static influences are found,
stop there.

1 files changed, 3 insertions, 3 deletions

diff --git a/IkiWiki/Plugin/meta.pm b/IkiWiki/Plugin/meta.pm
index c675880b3..8dcd73a1a 100644
--- a/IkiWiki/Plugin/meta.pm
+++ b/IkiWiki/Plugin/meta.pm
@@ -291,14 +291,14 @@ sub match {
 
 	if (defined $val) {
 		if ($val=~/^$re$/i) {
-			return IkiWiki::SuccessReason->new("$re matches $field of $page", $page => $IkiWiki::DEPEND_CONTENT);
+			return IkiWiki::SuccessReason->new("$re matches $field of $page", $page => $IkiWiki::DEPEND_CONTENT, "" => 1);
 		}
 		else {
-			return IkiWiki::FailReason->new("$re does not match $field of $page");
+			return IkiWiki::FailReason->new("$re does not match $field of $page", "" => 1);
 		}
 	}
 	else {
-		return IkiWiki::FailReason->new("$page does not have a $field");
+		return IkiWiki::FailReason->new("$page does not have a $field", "" => 1);
 	}
 }