If you use git, the `source` directory is assumed to be a clone of the
[[git]] repository.
+ If you use tla, the `source` directory is assumed to be a tla import.
+
+ If you use mercurial, the `source` directory is assumed to be the
+ [[mercurial]] repository.
+
In [[CGI]] mode, with a revision control system enabled pages edited via
the web will be committed. Also, the [[RecentChanges]] link will be placed
on pages.