There's been a lot of work on contrib syntax highlighting plugins. One should be
picked and added to ikiwiki core.

Ideally, it should support both converting whole source files into wiki
pages, as well as doing syntax highlighting as a preprocessor directive 
(which is either passed the text, or reads it from a file).

The big list of possibilities:

* [[plugins/contrib/highlightcode]] uses [[cpan Syntax::Highlight::Engine::Kate]],
  operates on whole source files only, has a few bugs (see
  [here](http://u32.net/Highlight_Code_Plugin/), and needs to be updated to
  support [[bugs/multiple_pages_with_same_name]].
* [[cpan IkiWiki-Plugin-syntax]] only operates as a directive.
  Interestingly, it supports multiple highlighting backends, including Kate
  and Vim.
* [[plugins/contrib/syntax]] only operates as a directive
  ([[not_on_source_code_files|automatic_use_of_syntax_plugin_on_source_code_files]]),
  and uses [[cpan Text::VimColor]].
* [[plugins/contrib/sourcehighlight]] uses src-highlight, and operates on
  whole source files only. Needs to be updated to
  support [[bugs/multiple_pages_with_same_name]].
* [[sourcecode|todo/automatic_use_of_syntax_plugin_on_source_code_files/discussion]]
  also uses src-highlight, and operates on whole source files.
  Has problems with [[bugs/multiple_pages_with_same_name]].

General problems:

* Using non-perl syntax highlighting backends is slow. I'd prefer either
  using a perl module, or a multiple-backend solution that can use a perl
  module as one option.
* Currently no single plugin supports both modes of operation (directive
  and whole source file to page).
* Nothing seems to support 
  [[wiki-formatted_comments|wiki-formatted_comments_with_syntax_plugin]]
  inside source files. Doing this probably means post-processing the 
  results of the highlighting engine, to find places where it's highlighted
  comments, and then running them through the ikiwiki rendering pipeline.
  This seems fairly doable with [[cpan Syntax::Highlight::Engine::Kate]],
  at least.
* The whole-file plugins tend to have a problem that things that look like
  wikilinks in the source code get munged into links by ikiwiki, which can
  have confusing results. Similar problem with preprocessor directives.
* The whole-file plugins all get confused if there is a `foo.c` and a `foo.h`.
  This is trivially fixable now by passing the keepextension option when
  registering the htmlize hooks, though.
* Whole-file plugins register a bunch of htmlize hooks. The wacky thing
  about it is that, when creating a new page, you can then pick "c" or
  "h" or "pl" etc from the dropdown that normally has "mdwn" etc in it.
  Is this a bug, or a feature? (Even if a feature, plugins with many
  extensions make the dropdown unusable..)
* The per page highlighters can't handle "Makefile", or other files
  without a significant extension.
*