Migrate escaped directives (\[[) in doc/plugins to have \[[! prefix

[ikiwiki.git] / doc / plugins / write.mdwn

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 6b49ec58d9379b86b8fc6c842bce8479401681d8..22bd5d114872a62e80f29c7e3ab9d6bdf10f3a42 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -3,7 +3,7 @@ written to extend ikiwiki in many ways. Despite the length of this page,
 it's not really hard. This page is a complete reference to everything a
 plugin might want to do. There is also a quick [[tutorial]].
 
-[[toc levels=2]]
+[[!toc levels=2]]
 
 ## Types of plugins
 
@@ -189,7 +189,7 @@ 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
 templates. The function is passed named parameters. The "page" and
 "destpage" parameters are the same as for a preprocess hook. The "template"
-parameter is a [[cpan HTML::Template]] object that is the template that
+parameter is a [[!cpan HTML::Template]] object that is the template that
 will be used to generate the page. The function can manipulate that
 template object.
 
@@ -216,6 +216,17 @@ modify the body of a page after it has been fully converted to html.
 The function is passed named parameters: "page", "destpage", and "content",
 and should return the sanitized content.
 
+### postscan
+
+       hook(type => "postscan", id => "foo", call => \&postscan);
+
+This hook is called once the full page body is available (but before the
+format hook). The most common use is to update search indexes. Added in
+ikiwiki 2.54.
+
+The function is passed named parameters "page" and "content". Its return
+value is ignored.
+
 ### format
 
        hook(type => "format", id => "foo", call => \&format);
@@ -314,7 +325,7 @@ It can modify the content as desired, and should return the content.
        hook(type => "formbuilder_setup", id => "foo", call => \&formbuilder_setup);
        hook(type => "formbuilder", id => "foo", call => \&formbuilder);
 
-These hooks allow tapping into the parts of ikiwiki that use [[cpan
+These hooks allow tapping into the parts of ikiwiki that use [[!cpan
 CGI::FormBuilder]] to generate web forms. These hooks are passed named
 parameters: `cgi`, `session`, `form`, and `buttons`. These are, respectively,
 the `CGI` object, the user's `CGI::Session`, a `CGI::FormBuilder`, and a
@@ -412,16 +423,17 @@ Aborts with an error message. If the second parameter is passed, it is a
 function that is called after the error message is printed, to do any final
 cleanup.
 
-Note that while any plugin can use this for a fatal error, plugins should
-try to avoid dying on bad input when building a page, as that will halt
-the entire wiki build and make the wiki unusable. So for example, if a
-[[ikiwiki/PreProcessorDirective]] is passed bad parameters, it's better to
-return an error message, which can appear on the wiki page, rather than
-calling error().
+If called inside a preprocess hook, error() does not abort the entire
+wiki build, but instead replaces the [[ikiwiki/PreProcessorDirective]] with
+a version containing the error message.
+
+In other hooks, error() is a fatal error, so use with care. Try to avoid
+dying on bad input when building a page, as that will halt
+the entire wiki build and make the wiki unusable.
 
 #### `template($;@)`
 
-Creates and returns a [[cpan HTML::Template]] object. The first parameter
+Creates and returns a [[!cpan HTML::Template]] object. The first parameter
 is the name of the file in the template directory. The optional remaining
 parameters are passed to `HTML::Template->new`.