Added a "changes" hook. Renamed the "change" hook to "rendered", but

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

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 3cab7588ec99c7a83fa6755fe3870fc93d6fb4d3..4c66e51f865dc4f0490a18d9426286909dfd2d5e 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -1,4 +1,4 @@
-lkiwiki's plugin interface allows all kinds of useful [[plugins]] to be
+Ikiwiki's plugin interface allows all kinds of useful [[plugins]] to be
 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]].
@@ -356,21 +356,48 @@ when the page is being previewed.)
 The function is passed named parameters: "page" and "content", and 
 should return the formatted content.
 
+### build_affected
+
+       hook(type => "build_affected", id => "foo", call => \&build_affected);
+
+This hook is called after the directly changed pages have been built,
+and can cause extra pages to be built. If links and backlinks were provided
+by a plugin, this would be where that plugin would rebuild pages whose
+backlinks have changed, for instance. The [[trail]] plugin uses this hook
+to rebuild pages whose next or previous page has changed.
+
+The function should currently ignore its parameters. It returns a list with
+an even number of items (a hash in list context), where the first item of
+each pair is a page name to be rebuilt (if it was not already rebuilt), and
+the second is a log message resembling
+`building plugins/write because the phase of the moon has changed`.
+
 ### delete
 
        hook(type => "delete", id => "foo", call => \&delete);
 
-Each time a page or pages is removed from the wiki, the referenced function
+After a page or pages is removed from the wiki, the referenced function
 is called, and passed the names of the source files that were removed.
 
-### change
+### rendered
 
-       hook(type => "change", id => "foo", call => \&render);
+       hook(type => "rendered", id => "foo", call => \&rendered);
 
-Each time ikiwiki renders a change or addition (but not deletion) to the
+After ikiwiki renders a change or addition (but not deletion) to the
 wiki, the referenced function is called, and passed the names of the
 source files that were rendered.
 
+(This hook used to be called "change", but that was not accurate.
+For now, plugins using the old hook name will still work.)
+
+### changes
+
+       hook(type => "changes", id => "foo", call => \&changes);
+
+After ikiwiki renders changes to the wiki, the referenced function is
+called, and passed the names of the source files that were added, modified,
+or deleted.
+
 ### cgi
 
        hook(type => "cgi", id => "foo", call => \&cgi);
@@ -580,6 +607,7 @@ describes the plugin as a whole. For example:
 * `description` is a short description of the option.
 * `link` is a link to further information about the option. This can either
   be a [[ikiwiki/WikiLink]], or an url.
+* `htmldescription` is displayed instead of the description by websetup.
 * `advanced` can be set to true if the option is more suitable for advanced
   users.
 * `safe` should be false if the option should not be displayed in unsafe
@@ -988,6 +1016,9 @@ Construct a relative url to the first parameter from the page named by the
 second. The first parameter can be either a page name, or some other
 destination file, as registered by `will_render`.
 
+Provide a second parameter whenever possible, since this leads to better
+behaviour for the [[plugins/po]] plugin and `file:///` URLs.
+
 If the second parameter is not specified (or `undef`), the URL will be
 valid from any page on the wiki, or from the CGI; if possible it'll
 be a path starting with `/`, but an absolute URL will be used if
@@ -1106,9 +1137,7 @@ to version control; the subdir can be added if so.
 Remove a file. The filename is relative to the root of the srcdir.
 
 Note that this should not commit the removal, it should only prepare for it
-to be committed when `rcs_commit` (or `rcs_commit_staged`) is called. Note
-that the new file may be in a new subdir that is not yet in version
-control; the subdir can be added if so.
+to be committed when `rcs_commit` (or `rcs_commit_staged`) is called.
 
 #### `rcs_rename($$)`
 
@@ -1148,11 +1177,13 @@ The data structure returned for each change is:
                ],
        }
 
-#### `rcs_diff($)`
+#### `rcs_diff($;$)`
+
+The first parameter is the rev from `rcs_recentchanges`.
+The optional second parameter is how many lines to return (default: all).
 
-The parameter is the rev from `rcs_recentchanges`.
 Should return a list of lines of the diff (including \n) in list
-context, and the whole diff in scalar context.
+context, and a string containing the whole diff in scalar context.
 
 #### `rcs_getctime($)`