add displaytime hook

Need to use a hook because an exported function cannot be reliably
overridden. The replacement verstion was actually only affecting plugins
loaded after it.

formattime doesn't need a hook, since there's no reason to export it.

1 files changed, 7 insertions, 1 deletions

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index daf70c8e2..856b34ba1 100644
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -196,7 +196,6 @@ generating the page.
 
 	hook(type => "pagetemplate", id => "foo", call => \&pagetemplate);
 
-
 [[Templates|wikitemplates]] are filled out for many different things in
 ikiwiki, like generating a page, or part of a blog page, or an rss feed, or
 a cgi. This hook allows modifying the variables available on those
@@ -361,6 +360,13 @@ This hook is called whenever ikiwiki normally saves its state, just before
 the state is saved. The function can save other state, modify values before
 they're saved, etc.
 
+### displaytime
+
+	hook(type => "displaytime", id => "foo", call => \&display);
+
+This hook can be registered to override the regular `displaytime` function.
+Only the last displaytime hook will be used.
+
 ### renamepage
 
 	hook(type => "renamepage", id => "foo", call => \&renamepage);