X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/998f47ed137959d0a0951368d8d0f891673c3ce5..25543d98b792a86357fa2cbad11a43707905accd:/doc/plugins/write.mdwn

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 9128c7f54..9a5ca60a0 100644
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -1,4 +1,4 @@
-Ikiwiki's plugin interface allows all kinds of useful [[plugins]] to be
+lkiwiki'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]].
@@ -39,7 +39,7 @@ built.
 Now that it knows what pages it needs to build, ikiwiki runs two
 compile passes. First, it runs `scan` hooks, which collect metadata about
 the pages. Then it runs a page rendering pipeline, by calling in turn these
-hooks: `filter`, `preprocess`, `linkify`, `htmlize`, `postscan`,
+hooks: `filter`, `preprocess`, `linkify`, `htmlize`, `indexhtml`,
 `pagetemplate`, `sanitize`, `format`.
 
 After all necessary pages are built, it calls the `change` hook. Finally,
@@ -177,10 +177,15 @@ function is passed no values.
 
 	hook(type => "needsbuild", id => "foo", call => \&needsbuild);
 
-This allows a plugin to 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 files that will be rebuilt, and can modify the array, either
-adding or removing files from it.
+This allows a plugin to observe or even manipulate the list of files that
+need to be built when the wiki is refreshed. 
+
+As its first parameter, the function is passed a reference to an array of
+files that will be built. It should return an array reference that is a
+modified version of its input. It can add or remove files from it.
+
+The second parameter passed to the function is a reference to an array of
+files that have been deleted.
 
 ### scan
 
@@ -198,8 +203,8 @@ value is ignored.
 
 	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",
+Runs on the full raw source of a page, before anything else touches it, and
+can make arbitrary changes. The function is passed named parameters "page",
 "destpage", and "content". It should return the filtered content.
 
 ### preprocess
@@ -282,16 +287,16 @@ like `Makefile` that have no extension.
 If `hook` is passed an optional "longname" parameter, this value is used
 when prompting a user to choose a page type on the edit page form.
 
-### postscan
+### indexhtml
 
-	hook(type => "postscan", id => "foo", call => \&postscan);
+	hook(type => "indexhtml", id => "foo", call => \&indexhtml);
 
 This hook is called once the page has been converted to html (but before
 the generated html is put in a template). 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.
+The function is passed named parameters "page", "destpage", and "content".
+Its return value is ignored.
 
 ### pagetemplate
 
@@ -319,6 +324,15 @@ should return the name of the template file to use (relative to the
 template directory), or undef if it doesn't want to change the default
 ("page.tmpl").
 
+### pageactions
+
+	hook(type => "pageactions", id => "foo", call => \&pageactions);
+
+This hook allows plugins to add arbitrary actions to the action bar on a
+page (next to Edit, RecentChanges, etc). The hook is passed a "page"
+parameter, and can return a list of html fragments to add to the action
+bar.
+
 ### sanitize
 
 	hook(type => "sanitize", id => "foo", call => \&sanitize);
@@ -566,6 +580,7 @@ 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
@@ -586,7 +601,17 @@ describes the plugin as a whole. For example:
 	hook(type => "genwrapper", id => "foo", call => \&genwrapper);
 
 This hook is used to inject C code (which it returns) into the `main`
-function of the ikiwiki wrapper when it is being generated.
+function of the ikiwiki wrapper when it is being generated. 
+
+The code runs before anything else -- in particular it runs before
+the suid wrapper has sanitized its environment.
+
+### disable
+
+	hook(type => "disable", id => "foo", call => \&disable);
+
+This hook is only run when a previously enabled plugin gets disabled
+during ikiwiki setup. Plugins can use this to perform cleanups.
 
 ## Exported variables
 
@@ -701,9 +726,11 @@ the entire wiki build and make the wiki unusable.
 
 ### `template($;@)`
 
-Creates and returns a [[!cpan HTML::Template]] object. The first parameter
-is the name of the template file. The optional remaining parameters are
-passed to `HTML::Template->new`.
+Creates and returns a [[!cpan HTML::Template]] object. (In a list context,
+returns the parameters needed to construct the obhect.) 
+
+The first parameter is the name of the template file. The optional remaining
+parameters are passed to `HTML::Template->new`.
 
 Normally, the template file is first looked for in the templates/ subdirectory
 of the srcdir. Failing that, it is looked for in the templatedir.
@@ -714,6 +741,8 @@ with no ".tmpl" extension. Template pages are normally looked for in
 the templates/ directory. If the page name starts with "/", a page
 elsewhere in the wiki can be used.
 
+If the template is not found, or contains a syntax error, an error is thrown.
+
 ### `template_depends($$;@)`
 
 Use this instead of `template()` if the content of a template is being
@@ -936,13 +965,16 @@ search for files.
 If the directory name is not absolute, ikiwiki will assume it is in
 the parent directory of the configured underlaydir.
 
-### `displaytime($;$)`
+### `displaytime($;$$)`
 
 Given a time, formats it for display.
 
 The optional second parameter is a strftime format to use to format the
 time.
 
+If the third parameter is true, this is the publication time of a page.
+(Ie, set the html5 pubdate attribute.)
+
 ### `gettext`
 
 This is the standard gettext function, although slightly optimised.
@@ -951,14 +983,22 @@ This is the standard gettext function, although slightly optimised.
 
 This is the standard ngettext function, although slightly optimised.
 
-### `urlto($$;$)`
+### `urlto($;$$)`
 
 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`.
 
-If the third parameter is passed and is true, an absolute url will be
-constructed instead of the default relative url.
+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
+the wiki and the CGI are on different domains.
+
+If the third parameter is passed and is true, the url will be a fully
+absolute url. This is useful when generating an url to publish elsewhere.
 
 ### `newpagefile($$)`
 
@@ -1037,16 +1077,20 @@ token, that will be passed into `rcs_commit` when committing. For example,
 it might return the current revision ID of the file, and use that
 information later when merging changes.
 
-#### `rcs_commit($$$;$$)`
+#### `rcs_commit(@)`
+
+Passed named parameters: `file`, `message`, `token` (from `rcs_prepedit`),
+and `session` (optional).
 
-Passed a file, message, token (from `rcs_prepedit`), user, and ip address.
 Should try to commit the file. Returns `undef` on *success* and a version
 of the page with the rcs's conflict markers on failure.
 
-#### `rcs_commit_staged($$$)`
+#### `rcs_commit_staged(@)`
+
+Passed named parameters: `message`, and `session` (optional).
 
-Passed a message, user, and ip address. Should commit all staged changes.
-Returns undef on success, and an error message on failure.
+Should commit all staged changes. Returns undef on success, and an
+error message on failure.
 
 Changes can be staged by calls to `rcs_add`, `rcs_remove`, and
 `rcs_rename`.
@@ -1089,7 +1133,9 @@ The data structure returned for each change is:
 
 	{
 		rev => # the RCSs id for this commit
-		user => # name of user who made the change,
+		user => # user who made the change (may be an openid),
+		nickname => # short name for user (optional; not an openid),
+		
 		committype => # either "web" or the name of the rcs,
 		when => # time when the change was made,
 		message => [
@@ -1106,19 +1152,19 @@ 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($)`
 
 This is used to get the page creation time for a file from the RCS, by looking
 it up in the history.
 
-It's ok if this is not implemented, and throws an error.
-
 If the RCS cannot determine a ctime for the file, return 0.
 
 #### `rcs_getmtime($)`
@@ -1139,9 +1185,9 @@ sense to implement for all RCSs.
 
 It should examine the incoming changes, and do any sanity 
 checks that are appropriate for the RCS to limit changes to safe file adds,
-removes, and changes. If something bad is found, it should exit
-nonzero, to abort the push. Otherwise, it should return a list of
-files that were changed, in the form:
+removes, and changes. If something bad is found, it should die, to abort
+the push. Otherwise, it should return a list of files that were changed,
+in the form:
 
 	{
 		file => # name of file that was changed
@@ -1154,6 +1200,28 @@ files that were changed, in the form:
 The list will then be checked to make sure that each change is one that
 is allowed to be made via the web interface.
 
+#### `rcs_preprevert($)`
+
+This is called by the revert web interface. It is passed a RCS-specific
+change ID, and should determine what the effects would be of reverting
+that change, and return the same data structure as `rcs_receive`.
+
+Like `rcs_receive`, it should do whatever sanity checks are appropriate
+for the RCS to limit changes to safe changes, and die if a change would
+be unsafe to revert.
+
+#### `rcs_revert($)`
+
+This is called by the revert web interface. It is passed a named
+parameter rev that is the RCS-specific change ID to revert.
+
+It should try to revert the specified rev, and leave the reversion staged
+so `rcs_commit_staged` will complete it. It should return undef on _success_
+and an error message on failure.
+
+This hook and `rcs_preprevert` are optional, if not implemented, no revert
+web interface will be available.
+
 ### PageSpec plugins
 
 It's also possible to write plugins that add new functions to