* Add the needsbuild hook. Plugins can use this to manipulate which files

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

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index d9f25641d9d1ae82e888543902e5d61d91293a96..9d85d4a9f04d602ee1a61994ca54468dd06d2999 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -32,12 +32,6 @@ hook, a "id" paramter, which should be a unique string for this plugin, and
 a "call" parameter, which is a reference to a function to call for the
 hook.
 
-An optional "scan" parameter, if set to a true value, makes the hook be
-called during the preliminary scan that ikiwiki makes of updated pages,
-before begining to render pages. This parameter should be set to true if
-the hook modifies data in `%links`. Note that doing so will make the hook
-be run twice per page build, so avoid doing it for expensive hooks.
-
 An optional "last" parameter, if set to a true value, makes the hook run
 after all other hooks of its type. Useful if the hook depends on some other
 hook being run first.
@@ -68,6 +62,15 @@ configuration. It's called early in the startup process. The
 function is passed no values. It's ok for the function to call
 `error()` if something isn't configured right.
 
+### needsbuild
+
+       hook(type => "needsbuild", id => "foo", call => \&needsbuild);
+
+This allows a plugin the manipulate the list of files that need to be
+built when the wiki is refreshed. The function is passed a reference to an
+array of pages that will be rebuilt, and can modify the array, either
+adding or removing files from it.
+
 ### filter
 
        hook(type => "filter", id => "foo", call => \&filter);
@@ -76,14 +79,6 @@ Runs on the raw source of a page, before anything else touches it, and can
 make arbitrary changes. The function is passed named parameters `page` and
 `content` and should return the filtered content.
 
-### scan
-
-       hook(type => "scan", id => "foo", call => \&scan);
-
-This is identical to a preprocess hook (see below), except that it is
-called in the initial pass that scans pages for data that will be used in
-later passes. Scan hooks are the only hook that should modify `%links`.
-
 ### preprocess
 
 Adding a [[PreProcessorDirective]] is probably the most common use of a
@@ -104,6 +99,12 @@ parameters included in the directive are included as named parameters as
 well. Whatever the function returns goes onto the page in place of the
 directive.
 
+An optional "scan" parameter, if set to a true value, makes the hook be
+called during the preliminary scan that ikiwiki makes of updated pages,
+before begining to render pages. This parameter should be set to true if
+the hook modifies data in `%links`. Note that doing so will make the hook
+be run twice per page build, so avoid doing it for expensive hooks.
+
 Note that if the [[htmlscrubber]] is enabled, html in
 [[PreProcessorDirective]] output is sanitised, which may limit what your
 plugin can do. Also, the rest of the page content is not in html format at
@@ -448,4 +449,5 @@ IkiWiki::PageSpec package, that is named `match_foo`, where "foo()" is
 how it will be accessed in a [[PageSpec]]. The function will be passed
 two parameters: The name of the page being matched, and the thing to match
 against. It may also be passed additional, named parameters. It should return
-true if the page matches.
+a IkiWiki::SuccessReason object if the match succeeds, or an
+IkiWiki::FailReason object if the match fails.