This is my first cut at a feature like that requested in [[todo/Moving_Pages]]. In case it gets mangled you can find it on [my site](http://www.betacantrips.com//attic/move.patch).

A bunch of obvious shortcomings exist: 

* I'm not sure all the untaints are safe.
* No precautions whatsoever are made to protect against race conditions or failures
  in the rcs\_move function.
* movepage.tmpl doesn't exist yet.
* Some code is duplicated between cgi\_movepage and cgi\_editpage, as well
  as rcs\_commit and rcs\_move.
* The user interface is pretty lame -- there's no handy select list full 
  of possible places to move it or anything.
* I don't think I implemented cancelling.
* from is redundant with page.
* I don't think I called the right hook functions.
* No redirect pages like those mentioned on [[todo/Moving_Pages]] exist yet, 
  so none are created.
* It's not possible to get there through the actions listed on the wiki page.
  Instead you can select "Edit" and then change "edit" to "move" in the 
  location bar.

Anyhow, here's the patch, for whatever good it does.

    diff -urx .svn ikiwiki/IkiWiki/CGI.pm ikiwiki-new/IkiWiki/CGI.pm
    --- ikiwiki/IkiWiki/CGI.pm	2007-01-04 03:52:47.000000000 -0800
    +++ ikiwiki-new/IkiWiki/CGI.pm	2007-01-11 18:49:37.000000000 -0800
    @@ -523,6 +523,97 @@
     	}
     } #}}}
     
    +sub cgi_movepage($$) {
    +	my $q = shift;
    +	my $session = shift;
    +	eval q{use CGI::FormBuilder};
    +	error($@) if $@;
    +	my @fields=qw(do from rcsinfo subpage page newname message); # subpage ignored so far
    +	my @buttons=("Rename Page", "Cancel");
    +
    +	my $form = CGI::FormBuilder->new(
    +		fields => \@fields,
    +                header => 1,
    +                charset => "utf-8",
    +                method => 'POST',
    +		action => $config{cgiurl},
    +                template => (-e "$config{templatedir}/movepage.tmpl" ?
    +			     {template_params("movepage.tpml")} : ""),
    +	);
    +	run_hooks(formbuilder_setup => sub {
    +		shift->(form => $form, cgi => $q, session => $session);
    +	});
    +
    +	decode_form_utf8($form);
    +	
    +	# This untaint is safe because if the page doesn't exist, bail.
    +	my $page = $form->field('page');
    +	$page = possibly_foolish_untaint($page);
    +	if (! exists $pagesources{$page}) {
    +		error("page does not exist");
    +	}
    +	my $file=$pagesources{$page};
    +	my $type=pagetype($file);
    +
    +	my $from;
    +	if (defined $form->field('from')) {
    +		($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
    +	}
    +	
    +	$form->field(name => "do", type => 'hidden');
    +	$form->field(name => "from", type => 'hidden');
    +	$form->field(name => "rcsinfo", type => 'hidden');
    +	$form->field(name => "subpage", type => 'hidden');
    +	$form->field(name => "page", value => $page, force => 1);
    +	$form->field(name => "newname", type => "text", size => 80);
    +	$form->field(name => "message", type => "text", size => 80);
    +
    +	if (! $form->submitted) {
    +		$form->field(name => "rcsinfo", value => rcs_prepedit($file),
    +			     force => 1);
    +	}
    +
    +	if ($form->submitted eq "Cancel") {
    +		redirect($q, "$config{url}/".htmlpage($from));
    +		return;
    +	}
    +		
    +	if (! $form->submitted || $form->submitted eq "Preview" || 
    +	    ! $form->validate) {
    +		if ($form->field("do") eq "move"){
    +			page_locked($page, $session);
    +			$form->tmpl_param("page_select", 0);
    +			$form->field(name => "page", type => 'hidden');
    +			$form->field(name => "type", type => 'hidden');
    +			$form->title(sprintf(gettext("moving %s"), pagetitle($page)));
    +			if (! defined $form->field('newname') ||
    +			    ! length $form->field('newname')) {
    +				$form->field(name => "newname", 
    +					     value => pagetitle($page), force => 1);
    +			}
    +
    +		}
    +		print $form->render(submit => \@buttons);
    +	}
    +	else{
    +		# This untaint is safe because titlepage removes any problematic
    +		# characters.
    +		my ($newname)=$form->field('newname');
    +		$newname=titlepage(possibly_foolish_untaint($newname));
    +		if (! defined $newname || ! length $newname || file_pruned($newname, $config{srcdir}) || $newname=~/^\//) {
    +			error("bad page name");
    +		}
    +		page_locked($page, $session);
    +
    +		my $newfile = $newname . ".$type";
    +		my $message = $form->field('message');
    +		unlockwiki();
    +		rcs_move($file, $newfile, $message, $form->field("rcsinfo"), 
    +			 $session->param("name"), $ENV{REMOTE_ADDR});
    +		redirect($q, "$config{url}/".htmlpage($newname));
    +	}
    +}
    +
     sub cgi_getsession ($) { #{{{
     	my $q=shift;
     
    @@ -631,6 +722,9 @@
     	if ($do eq 'create' || $do eq 'edit') {
     		cgi_editpage($q, $session);
     	}
    +	elsif ($do eq 'move') {
    +		cgi_movepage($q, $session);
    +	}
     	elsif ($do eq 'prefs') {
     		cgi_prefs($q, $session);
     	}
    diff -urx .svn ikiwiki/IkiWiki/Rcs/svn.pm ikiwiki-new/IkiWiki/Rcs/svn.pm
    --- ikiwiki/IkiWiki/Rcs/svn.pm	2006-12-28 17:50:46.000000000 -0800
    +++ ikiwiki-new/IkiWiki/Rcs/svn.pm	2007-01-11 18:14:30.000000000 -0800
    @@ -60,6 +60,34 @@
     	}
     } #}}}
     
    +sub rcs_move ($$$$;$$) {
    +	my $file=shift;
    +	my $newname=shift;
    +	my $message=shift;
    +	my $rcstoken=shift;
    +	my $user=shift;
    +	my $ipaddr=shift;
    +	if (defined $user) {
    +		$message="web commit by $user".(length $message ? ": $message" : "");
    +	}
    +	elsif (defined $ipaddr) {
    +		$message="web commit from $ipaddr".(length $message ? ": $message" : "");
    +	}
    +
    +	chdir($config{srcdir}); # svn merge wants to be here
    +
    +	if (system("svn", "move", "--quiet", 
    +		   "$file", "$newname") != 0) {
    +		return 1;
    +	}
    +	if (system("svn", "commit", "--quiet", 
    +		   "--encoding", "UTF-8", "-m",
    +		   possibly_foolish_untaint($message)) != 0) {
    +		return 1;
    +	}
    +	return undef # success
    +}
    +
     sub rcs_commit ($$$;$$) { #{{{
     	# Tries to commit the page; returns undef on _success_ and
     	# a version of the page with the rcs's conflict markers on failure.