+`ikiwiki` is a wiki compiler. It builds static html pages for a wiki, from
+`source` in the [[MarkDown]] language, and writes it out to `destination`.
+
+Note that most options can be shortened to single letters, and boolean
+flags such as --verbose can be negated with --no-verbose.
+
+# MODE OPTIONS
+
+These options control the mode that ikiwiki is operating in.
+
+* --refresh
+
+ Refresh the wiki, updating any changes pages. This is the default
+ behavior so you don't normally need to specify it.
+
+* --rebuild
+
+ Force a rebuild of all pages.
+
+* --cgi
+
+ Enable [[CGI]] mode. In cgi mode ikiwiki runs as a cgi script, and
+ supports editing pages, signing in, registration, and displaying
+ [[RecentChanges]].
+
+ To use ikiwiki as a [[CGI]] program you need to use --wrapper or --setup
+ to generate a wrapper. The wrapper will generally need to run suid 6755 to
+ the user who owns the `source` and `destination` directories.
+
+* --wrapper [file]
+
+ Generate a [[wrapper]] binary that is hardcoded to do action specified by
+ the other options, using the specified input files and `destination`
+ directory. The filename to use for the wrapper is optional.
+
+ The wrapper is designed to be safely made suid and be run by untrusted
+ users, as a [[Subversion]] [[post-commit]] hook, or as a [[CGI]].
+
+ Note that the generated wrapper will ignore all command line parameters.
+
+* --setup configfile
+
+ In setup mode, ikiwiki reads the config file, which is really a perl
+ program that can call ikiwiki internal functions.
+
+ The default action when --setup is specified is to automatically generate
+ wrappers for a wiki based on data in a config file, and rebuild the wiki.
+ If you also pass the --refresh option, ikiwiki will instead just refresh
+ the wiki described in the setup file.