= Elnode Wiki =

This is Elnode's Wiki.  It is based on the {{{creole}}} wiki language
and is written completely in EmacsLisp.

{{default-wiki-logo.gif|GNUs sitting on clouds}}

== What does it do? ==

It does syntax coloring:

{{{
##! emacs-lisp
(defun elnode-wiki-handler (httpcon wikiroot)
  "A low level handler for Wiki operations.

Send the Wiki page requested, which must be a file existing under
the WIKIROOT, back to the HTTPCON.

Update operations are protected by authentication."
  (elnode-method httpcon
    (GET
     (elnode-docroot-for wikiroot
       with target-path
       on httpcon
       do
       (if (equal target-path (expand-file-name (concat wikiroot "/")))
           (elnode-wiki-page httpcon (concat wikiroot "/index.creole"))
           (elnode-wiki-page httpcon target-path))))
    (POST
     (elnode-with-auth httpcon 'elnode-wiki-auth
       (let* ((path (elnode-http-pathinfo httpcon))
              (text (elnode-wiki--text-param httpcon)))
         (if (not (elnode-http-param httpcon "preview"))
             ;; A save request in which case save the new text and then
             ;; send the wiki text.
             (elnode-wiki--save-request httpcon wikiroot path text)
             ;; Might be a preview request in which case send back the WIKI
             ;; text that's been sent.
             (with-temp-file "/tmp/preview"
               (insert text))
             (elnode-wiki-send httpcon "/tmp/preview" path)))))))
}}}

It does links, for example to
[[http://github.com/nicferrier/elwikicreole|Emacs Creole]] which is
the Wiki render engine used to display pages.

It does all the normal Wiki things like headings and lists.

You can also do some special Emacs things, like org-mode tables:

|       Date | Amount | Description         |
|------------+--------+---------------------|
| 2011-11-15 | 100.15 | Expensive lunch out |
| 2011-11-18 |   7.30 | Dry cleaning        |
| 2011-11-21 |  22.50 | Takeaway curry      |
|------------+--------+---------------------|
|            | 129.95 |                     |
#+TBLFM: @5$2=vsum(@I..@II)

and lisp callouts:

<<(
 (mapconcat
   (lambda (s)
     (format "* %s" s))
   '("which" "eval" "lisp" "and" "render" "the" "results")
   "\n")
)>>


== Authentication ==

By default, the Wiki uses an authentication database in the Emacs
instance running Elnode and the Wiki server.

If you want to add a user to the Wiki so you can edit pages you can do this in Emacs:

{{{
M-x elnode-auth-user-add
}}}

and it will ask you for a username and a password.  The user will be
stored in a persistent database.


== Where the Wiki pages are ==

By default the Elnode Wiki stores files in your {{{~/.emacs.d}}}
directory which is actually defined by the variable
{{{user-emacs-directory}}} in Emacs.

There is normally a directory {{{elnode}}} in that directory which
contains directories for the Web server document root and the Wiki.

The location of the Wiki files can be configured though, try:

{{{
M-x customize-variable [RET] elnode-wikiserver-wikiroot
}}}

== More customization ==

There are many other things in Elnode's Wiki that can be customized,
including the header and footer. Use:

{{{
M-x customize-group [RET] elnode-wikiserver [RET]
}}}

There is more to do with the Elnode Wiki server because there is so
much that Emacs can do.