a "call" parameter, which is a reference to a function to call for the
hook.
-# Writing a [[PreProcessorDirective]]
+# Types of hooks
-This is probably the most common use of a plugin.
+In roughly the order they are called.
+
+## getopt
+
+ IkiWiki::hook(type => "getopt", id => "foo", call => \&getopt);
+
+This allows for plugins to perform their own processing of command-line
+options and so add options to the ikiwiki command line. It's called during
+command line processing, with @ARGV full of any options that ikiwiki was
+not able to process on its own. The function should process any options it
+can, removing them from @ARGV, and probably recording the configuration
+settings in %IkiWiki::config. It should take care not to abort if it sees
+an option it cannot process, and should just skip over those options and
+leave them in @ARGV.
+
+## checkconfig
+
+ IkiWiki::hook(type => "checkconfig", id => "foo", call => \&checkconfig);
+
+This is useful if the plugin needs to check for or modify ikiwiki's
+configuration. It's called early in the startup process. The
+function is passed no values. It's ok for the function to call
+IkiWiki::error if something isn't configured right.
+
+## filter
+
+ IkiWiki::hook(type => "filter", id => "foo", call => \&filter);
+
+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.
+
+## preprocess
+
+Adding a [[PreProcessorDirective]] is probably the most common use of a
+plugin.
IkiWiki::hook(type => "preprocess", id => "foo", call => \&preprocess);
-Replace "foo" with the command name that will be used inside brackers for
+Replace "foo" with the command name that will be used inside brackets for
the preprocessor directive.
Each time the directive is processed, the referenced function (`preprocess`
in the directive are included as named parameters as well. Whatever the
function returns goes onto the page in place of the directive.
-## Error handing
-
-While a plugin can call ikiwiki's error routine for a fatal error, for
-errors that aren't intended to halt the entire wiki build, including bad
-parameters passed to a [[PreProcessorDirective]], etc, it's better to just
-return the error message as the output of the plugin.
-
-## Html issues
-
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
through markdown (or whatever engine is used to htmlize the page) along
with the rest of the page.
-# Other types of hooks
-
-Beyond PreProcessorDirectives, Other types of hooks that can be used by
-plugins include:
-
-## checkconfig
-
- IkiWiki::hook(type => "checkconfig", id => "foo", call => \&checkconfig);
-
-This is useful if the plugin needs to check for, or modify ikiwiki's
-configuration. It's called early in the ikiwiki startup process. The
-function is passed no values. It's ok for the function to call
-IkiWiki::error if something isn't configured right.
-
-## filter
-
- IkiWiki::hook(type => "filter", id => "foo", call => \&filter);
-
-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.
-
## htmlize
- IkiWiki::hook(type => "htmlize", id => "ext", call => \&filter);
+ IkiWiki::hook(type => "htmlize", id => "ext", call => \&htmlize);
Runs on the raw source of a page and turns it into html. The id parameter
specifies the filename extension that a file must have to be htmlized using
IkiWiki::hook(type => "pagetemplate", id => "foo", call => \&pagetemplate);
-Each time a page is rendered, a [[template|templates]] is filled out.
-This hook allows modifying that template. The function is passed named
-parameters. The "page" and "destpage" parameters are the same as for a
-preprocess hook. The "template" parameter is a `HTML::Template` object that
-is the template that will be used to generate the page. The function
-can manipulate that template object.
+Each time a page (or part of a blog page, or an rss feed) is rendered, a
+[[template|templates]] is filled out. This hook allows modifying that
+template. The function is passed named parameters. The "page" and
+"destpage" parameters are the same as for a preprocess hook. The "template"
+parameter is a `HTML::Template` object that is the template that will be
+used to generate the page. The function can manipulate that template
+object.
The most common thing to do is probably to call $template->param() to add
-a new custom parameter to the template. Note that in order to be robust,
-it's a good idea to check whether the template has a variable before trying
-to set it, as setting a variable that's not present is an error.
-
- if ($template->query(name => 'foo')) {
- $template->param("foo" => "bar");
- }
+a new custom parameter to the template.
## sanitize
IkiWiki::hook(type => "sanitize", id => "foo", call => \&sanitize);
Use this to implement html sanitization or anything else that needs to
-modify the content of a page after it has been fully converted to html.
+modify the body of a page after it has been fully converted to html.
The function is passed the page content and should return the sanitized
content.
+## format
+
+ IkiWiki::hook(type => "format", id => "foo", call => \&format);
+
+The function is passed the complete page content and can reformat it
+and return the new content. The difference between format and sanitize is
+that sanitize only acts on the page body, while format can modify the
+entire html page including the header and footer inserted by ikiwiki, the
+html document type, etc.
+
## delete
- IkiWiki::hook(type => "delete", id => "foo", call => \&dele);
+ IkiWiki::hook(type => "delete", id => "foo", call => \&delete);
Each time 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.
parameters, and if it will handle this CGI request, output a page and
terminate the program.
+## savestate
+
+ IkiWiki::hook(type => "savestate", id => "foo", call => \&savestate);
+
+This hook is called wheneven ikiwiki normally saves its state, just before
+the state is saved. The function can save other state, modify values before
+they're saved, etc.
+
+## Error handing
+
+While a plugin can call ikiwiki's error routine for a fatal error, for
+errors that aren't intended to halt the entire wiki build, including bad
+parameters passed to a [[PreProcessorDirective]], etc, it's better to just
+return the error message as the output of the plugin.
+
# Wiki configuration
A plugin can access the wiki's configuration via the `%IkiWiki::config`
* `%IkiWiki::renderedfiles` contains the name of the file rendered by a
page
* `%IkiWiki::pagesources` contains the name of the source file for a page.
-* `%IkiWiki::depends` contains a [[GlobList]] that is used to specify other
+* `%IkiWiki::depends` contains a [[PageSpec]] that is used to specify other
pages that a page depends on. If one of its dependencies is updated, the
page will also get rebuilt.
Many plugins will need to add dependencies to this hash; the best way to do
it is by using the IkiWiki::add_depends function, which takes as its
- parameters the page name and a [[GlobList]] of dependencies to add.
+ parameters the page name and a [[PageSpec]] of dependencies to add.
+* `%IkiWiki::forcerebuild` any pages set as the keys to this hash will be
+ treated as if they're modified and rebuilt.
# A note on generating html links
Many plugins need to generate html links and add them to a page. This is
-done by using the htmllink() function in ikiwiki. The usual way to call
-htmlllink is: `htmllink($page, $page, $link)`
+done by using the `IkiWiki::htmllink` function. The usual way to call
+htmlllink is:
+
+ htmllink($page, $page, $link)
Why is $page repeated? Because if a page is inlined inside another, and a
link is placed on it, the right way to make that link is actually:
-`htmllink($page, $destpage, $link)`
+
+ htmllink($page, $destpage, $link)
Here $destpage is the inlining page. A destpage parameter is passed to some
of the hook functions above; the ones that are not passed it are not used
sipb-www / ikiwiki.git / blobdiff