report trouble trying to use IkiWiki::Setup::load outside ikiwiki

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

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 896b988270914e47faa9b714ac036f6a3da9fd7b..e8ba0a6abe6826924b8e41aee71b3ceea50ae13e 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -123,34 +123,42 @@ make arbitrary changes. The function is passed named parameters "page",
 
 ### preprocess
 
 
 ### preprocess
 

-Adding a [[ikiwiki/PreProcessorDirective]] is probably the most common use
+Adding a preprocessor [[ikiwiki/directive]] is probably the most common use

 of a plugin.
 
         hook(type => "preprocess", id => "foo", call => \&preprocess);
 
 of a plugin.
 
         hook(type => "preprocess", id => "foo", call => \&preprocess);
 

-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 example above) is called, and is passed named parameters. A "page"
-parameter gives the name of the page that embedded the preprocessor
-directive, while a "destpage" parameter gives the name of the page the
-content is going to (different for inlined pages), and a "preview"
-parameter is set to a true value if the page is being previewed. All
-parameters included in the directive are included as named parameters as
-well. Whatever the function returns goes onto the page in place of the
+Replace "foo" with the command name that will be used for the preprocessor

 directive.
 
 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. (As an
-optimisation, if your preprocessor hook is called in a void contets, you
-can assume it's being run in scan mode.)
+Each time the directive is processed, the referenced function (`preprocess`
+in the example above) is called. Whatever the function returns goes onto
+the page in place of the directive. Or, if the function aborts using
+`error()`, the directive will be replaced with the error message.
+
+The function is passed named parameters. First come the parameters set
+in the preprocessor directive. These are passed in the same order as
+they're in the directive, and if the preprocessor directive contains a bare
+parameter (example: `\[[!foo param]]`), that parameter will be passed with
+an empty value.
+
+After the parameters from the preprocessor directive some additional ones
+are passed: A "page" parameter gives the name of the page that embedded the
+preprocessor directive, while a "destpage" parameter gives the name of the
+page the content is going to (different for inlined pages), and a "preview"
+parameter is set to a true value if the page is being previewed.
+
+If `hook` is passed an optional "scan" parameter, set to a true value, this
+makes the hook be called during the preliminary scan that ikiwiki makes of
+updated pages, before begining to render pages. This should be done 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. (As an
+optimisation, if your preprocessor hook is called in a void context, you
+can assume it's being run in scan mode, and avoid doing expensive things at
+that point.)

 
 Note that if the [[htmlscrubber]] is enabled, html in
 
 Note that if the [[htmlscrubber]] is enabled, html in

-[[ikiwiki/PreProcessorDirective]] output is sanitised, which may limit what
+preprocessor [[ikiwiki/directive]] output is sanitised, which may limit what

 your plugin can do. Also, the rest of the page content is not in html
 format at preprocessor time. Text output by a preprocessor directive will
 be linkified and passed through markdown (or whatever engine is used to
 your plugin can do. Also, the rest of the page content is not in html
 format at preprocessor time. Text output by a preprocessor directive will
 be linkified and passed through markdown (or whatever engine is used to


@@ -184,6 +192,7 @@ return the htmlized content.
 
        hook(type => "pagetemplate", id => "foo", call => \&pagetemplate);
 
 
        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
 [[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


@@ -348,7 +357,7 @@ 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.
 
 the state is saved. The function can save other state, modify values before
 they're saved, etc.
 

-## renamepage
+### renamepage

 
        hook(type => "renamepage", id => "foo", call => \&renamepage);
 
 
        hook(type => "renamepage", id => "foo", call => \&renamepage);
 


@@ -367,36 +376,53 @@ configuration options.
 
 The hook is passed no parameters. It returns data about the configuration
 options added by the plugin. It can also check if the plugin is usable, and
 
 The hook is passed no parameters. It returns data about the configuration
 options added by the plugin. It can also check if the plugin is usable, and

-die if the plugin is not available, which will cause the plugin to not be
-offered in the configuration interface.
+die if not, which will cause the plugin to not be offered in the configuration
+interface.

 
 The data returned is a list of `%config` options, followed by a hash
 
 The data returned is a list of `%config` options, followed by a hash

-describing the option. For example:
+describing the option. There can also be an item named "plugin", which
+describes the plugin as a whole. For example:

 
                 return
                        option_foo => {
                                type => "boolean",
 
                 return
                        option_foo => {
                                type => "boolean",

-                               description => "enable foo",
+                               description => "enable foo?",
+                               advanced => 1,

                                safe => 1,
                                rebuild => 1,
                        },
                        option_bar => {
                                type => "string",
                                example => "hello",
                                safe => 1,
                                rebuild => 1,
                        },
                        option_bar => {
                                type => "string",
                                example => "hello",

-                               description => "what to say",
+                               description => "option bar",

                                safe => 1,
                                rebuild => 0,
                        },
                                safe => 1,
                                rebuild => 0,
                        },

+                       plugin => {
+                               description => "description of this plugin",
+                               safe => 1,
+                               rebuild => 1,
+                       },

 
 

-* `type` can be "boolean", "string", "integer", "internal" (used for values
-  that are not user-visible). The type is the type of the leaf values; 
-  the `%config` option may be an array or hash of these.
+* `type` can be "boolean", "string", "integer", "pagespec",
+  or "internal" (used for values that are not user-visible). The type is
+  the type of the leaf values;  the `%config` option may be an array or
+  hash of these.

 * `example` can be set to an example value.
 * `description` is a short description of the option.
 * `example` can be set to an example value.
 * `description` is a short description of the option.

+* `link` is a link to further information about the option. This can either
+  be a wikilink, or an url.
+* `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
   configuration methods, such as the web interface. Anything that specifies
   a command to run, a path on disk, or a regexp should be marked as unsafe.
 * `safe` should be false if the option should not be displayed in unsafe
   configuration methods, such as the web interface. Anything that specifies
   a command to run, a path on disk, or a regexp should be marked as unsafe.

-* `rebuild` should be true if changing the option will require a wiki rebuild.
+  If a plugin is marked as unsafe, that prevents it from being
+  enabled/disabled.
+* `rebuild` should be true if changing the option (or enabling/disabling
+  the plugin) will require a wiki rebuild, false if no rebuild is needed,
+  and undef if a rebuild could be needed in some circumstances, but is not
+  strictly required.

 
 ## Plugin interface
 
 
 ## Plugin interface
 


@@ -417,14 +443,14 @@ it's not exported, the wise choice is to not use it.
 
 A plugin can access the wiki's configuration via the `%config`
 hash. The best way to understand the contents of the hash is to look at
 
 A plugin can access the wiki's configuration via the `%config`
 hash. The best way to understand the contents of the hash is to look at

-[[ikiwiki.setup]], which sets the hash content to configure the wiki.
+your ikiwiki setup file, which sets the hash content to configure the wiki.

 
 ### %pagestate
 
 The `%pagestate` hash can be used by plugins to save state that they will need
 next time ikiwiki is run. The hash holds per-page state, so to set a value,
 
 ### %pagestate
 
 The `%pagestate` hash can be used by plugins to save state that they will need
 next time ikiwiki is run. The hash holds per-page state, so to set a value,

-use `%pagestate{$page}{$id}{$key}=$value`, and to retrieve the value,
-use `%pagestate{$page}{$id}{$key}`.
+use `$pagestate{$page}{$id}{$key}=$value`, and to retrieve the value,
+use `$pagestate{$page}{$id}{$key}`.

 
 The `$value` can be anything that perl's Storable module is capable of
 serializing. `$key` can be any string you like, but `$id` must be the same
 
 The `$value` can be anything that perl's Storable module is capable of
 serializing. `$key` can be any string you like, but `$id` must be the same


@@ -474,7 +500,7 @@ function that is called after the error message is printed, to do any final
 cleanup.
 
 If called inside a preprocess hook, error() does not abort the entire
 cleanup.
 
 If called inside a preprocess hook, error() does not abort the entire

-wiki build, but instead replaces the [[ikiwiki/PreProcessorDirective]] with
+wiki build, but instead replaces the preprocessor [[ikiwiki/directive]] with

 a version containing the error message.
 
 In other hooks, error() is a fatal error, so use with care. Try to avoid
 a version containing the error message.
 
 In other hooks, error() is a fatal error, so use with care. Try to avoid


@@ -769,15 +795,15 @@ IkiWiki::FailReason object if the match fails.
 
 ### Setup plugins
 
 
 ### Setup plugins
 

-The ikiwiki setup file is loaded using a pluggable mechanism. If you
-look at the top of [[ikiwiki.setup]], it starts with 
-'use IkiWiki::Setup::Standard', and the rest of the file is passed to
-that module's import method.
+The ikiwiki setup file is loaded using a pluggable mechanism. If you look
+at the top of a setup file, it starts with 'use IkiWiki::Setup::Standard',
+and the rest of the file is passed to that module's import method.

 
 It's possible to write other modules in the `IkiWiki::Setup::` namespace that
 can be used to configure ikiwiki in different ways. These modules should,
 when imported, populate `$IkiWiki::Setup::raw_setup` with a reference
 
 It's possible to write other modules in the `IkiWiki::Setup::` namespace that
 can be used to configure ikiwiki in different ways. These modules should,
 when imported, populate `$IkiWiki::Setup::raw_setup` with a reference

-to a hash containing all the config items.
+to a hash containing all the config items. They should also implement a
+`gendump` function.

 
 By the way, to parse a ikiwiki setup file, a program just needs to
 do something like:
 
 By the way, to parse a ikiwiki setup file, a program just needs to
 do something like: