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 9128c7f5453bd14b679e37ea31fdd14510a3b58b..4c66e51f865dc4f0490a18d9426286909dfd2d5e 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -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
 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,
 `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);
 
 
        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
 
 
 ### scan
 


@@ -198,8 +203,8 @@ value is ignored.
 
        hook(type => "filter", id => "foo", call => \&filter);
 
 
        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
 "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.
 
 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.
 
 
 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
 
 
 ### 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").
 
 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);
 ### sanitize
 
        hook(type => "sanitize", id => "foo", call => \&sanitize);


@@ -342,21 +356,48 @@ when the page is being previewed.)
 The function is passed named parameters: "page" and "content", and 
 should return the formatted content.
 
 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);
 
 ### 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.
 
 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.
 
 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);
 ### cgi
 
        hook(type => "cgi", id => "foo", call => \&cgi);


@@ -566,6 +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.
 * `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
 * `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 +628,17 @@ 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`
        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
 
 
 ## Exported variables
 


@@ -701,9 +753,11 @@ the entire wiki build and make the wiki unusable.
 
 ### `template($;@)`
 
 
 ### `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.
 
 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 +768,8 @@ 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.
 
 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
 ### `template_depends($$;@)`
 
 Use this instead of `template()` if the content of a template is being


@@ -936,13 +992,16 @@ search for files.
 If the directory name is not absolute, ikiwiki will assume it is in
 the parent directory of the configured underlaydir.
 
 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.
 
 
 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.
 ### `gettext`
 
 This is the standard gettext function, although slightly optimised.


@@ -951,14 +1010,22 @@ This is the standard gettext function, although slightly optimised.
 
 This is the standard ngettext 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`.
 
 
 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($$)`
 
 
 ### `newpagefile($$)`
 


@@ -1037,16 +1104,20 @@ 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.
 
 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.
 
 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 a message, user, and ip address. Should commit all staged changes.
-Returns undef on success, and an error message on failure.
+Passed named parameters: `message`, and `session` (optional).
+
+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`.
 
 Changes can be staged by calls to `rcs_add`, `rcs_remove`, and
 `rcs_rename`.


@@ -1066,9 +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
 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($$)`
 
 
 #### `rcs_rename($$)`
 


@@ -1089,7 +1158,9 @@ The data structure returned for each change is:
 
        {
                rev => # the RCSs id for this commit
 
        {
                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 => [
                committype => # either "web" or the name of the rcs,
                when => # time when the change was made,
                message => [


@@ -1106,19 +1177,19 @@ 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
 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.
 
 
 #### `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($)`
 If the RCS cannot determine a ctime for the file, return 0.
 
 #### `rcs_getmtime($)`


@@ -1139,9 +1210,9 @@ 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,
 
 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
 
        {
                file => # name of file that was changed


@@ -1154,6 +1225,28 @@ 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.
 
 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
 ### PageSpec plugins
 
 It's also possible to write plugins that add new functions to