X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/56fd145ceb40422286ce0095183bdb9b869baa32..e622b275c576ff4939cada803b07eaa372119218:/ikiwiki

diff --git a/ikiwiki b/ikiwiki
index c57c2e507..da3dde46d 100755
--- a/ikiwiki
+++ b/ikiwiki
@@ -5,70 +5,75 @@ use strict;
 use File::Find;
 use Memoize;
 use File::Spec;
+use HTML::Template;
 
 BEGIN {
 	$blosxom::version="is a proper perl module too much to ask?";
 	do "/usr/bin/markdown";
 }
 
-memoize('pagename');
-memoize('bestlink');
-
-sub usage {
-	die "usage: ikiwiki [options] source dest\n";
-}
-
-my $link=qr/\[\[([^\s]+)\]\]/;
+$ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
+my ($srcdir, $templatedir, $destdir, %links, %oldlinks, %oldpagemtime,
+    %renderedfiles, %pagesources);
+my $wiki_link_regexp=qr/\[\[([^\s]+)\]\]/;
+my $wiki_file_regexp=qr/(^[-A-Za-z0-9_.:\/+]+$)/;
+my $wiki_file_prune_regexp=qr!((^|/).svn/|\.\.|^\.|\/\.|\.html?$)!;
 my $verbose=0;
-my $rebuild=0;
 my $wikiname="wiki";
-if (grep /^-/, @ARGV) {
-	eval {use Getopt::Long};
-	GetOptions(
-		"wikiname=s" => \$wikiname,
-		"verbose|v" => \$verbose,
-		"rebuild" => \$rebuild,
-	) || usage();
-}
-usage() unless @ARGV == 2;
-my ($srcdir) = shift =~ /(.*)/; # untaint
-my ($destdir) = shift =~ /(.*)/; # untaint
-
-my %links;
-my %oldlinks;
-my %oldpagemtime;
-my %renderedfiles;
-my %pagesources;
-
-sub error ($) {
-	die @_;
-}
+my $default_pagetype=".mdwn";
+my $cgi=0;
+my $url="";
+my $cgiurl="";
+my $historyurl="";
+my $svn=1;
+my $anonok=0;
+
+sub usage { #{{{
+	die "usage: ikiwiki [options] source templates dest\n";
+} #}}}
+
+sub error ($) { #{{{
+	if ($cgi) {
+		print "Content-type: text/html\n\n";
+		print "Error: @_\n";
+		exit 1;
+	}
+	else {
+		die @_;
+	}
+} #}}}
 
-sub debug ($) {
+sub debug ($) { #{{{
 	print "@_\n" if $verbose;
-}
+} #}}}
 
-sub mtime ($) {
+sub mtime ($) { #{{{
 	my $page=shift;
 	
 	return (stat($page))[9];
-}
+} #}}}
+
+sub possibly_foolish_untaint ($) { #{{{
+	my $tainted=shift;
+	my ($untainted)=$tainted=~/(.*)/;
+	return $untainted;
+} #}}}
 
-sub basename {
+sub basename ($) { #{{{
 	my $file=shift;
 
 	$file=~s!.*/!!;
 	return $file;
-}
+} #}}}
 
-sub dirname {
+sub dirname ($) { #{{{
 	my $file=shift;
 
 	$file=~s!/?[^/]+$!!;
 	return $file;
-}
+} #}}}
 
-sub pagetype ($) {
+sub pagetype ($) { #{{{
 	my $page=shift;
 	
 	if ($page =~ /\.mdwn$/) {
@@ -77,38 +82,38 @@ sub pagetype ($) {
 	else {
 		return "unknown";
 	}
-}
+} #}}}
 
-sub pagename ($) {
+sub pagename ($) { #{{{
 	my $file=shift;
 
 	my $type=pagetype($file);
 	my $page=$file;
 	$page=~s/\Q$type\E*$// unless $type eq 'unknown';
 	return $page;
-}
+} #}}}
 
-sub htmlpage ($) {
+sub htmlpage ($) { #{{{
 	my $page=shift;
 
 	return $page.".html";
-}
+} #}}}
 
-sub readpage ($) {
-	my $page=shift;
+sub readfile ($) { #{{{
+	my $file=shift;
 
 	local $/=undef;
-	open (PAGE, "$srcdir/$page") || error("failed to read $page: $!");
-	my $ret=<PAGE>;
-	close PAGE;
+	open (IN, "$file") || error("failed to read $file: $!");
+	my $ret=<IN>;
+	close IN;
 	return $ret;
-}
+} #}}}
 
-sub writepage ($$) {
-	my $page=shift;
+sub writefile ($$) { #{{{
+	my $file=shift;
 	my $content=shift;
 
-	my $dir=dirname("$destdir/$page");
+	my $dir=dirname($file);
 	if (! -d $dir) {
 		my $d="";
 		foreach my $s (split(m!/+!, $dir)) {
@@ -119,26 +124,26 @@ sub writepage ($$) {
 		}
 	}
 	
-	open (PAGE, ">$destdir/$page") || error("failed to write $page: $!");
-	print PAGE $content;
-	close PAGE;
-}
+	open (OUT, ">$file") || error("failed to write $file: $!");
+	print OUT $content;
+	close OUT;
+} #}}}
 
-sub findlinks {
+sub findlinks ($) { #{{{
 	my $content=shift;
 
 	my @links;
-	while ($content =~ /$link/g) {
+	while ($content =~ /$wiki_link_regexp/g) {
 		push @links, lc($1);
 	}
 	return @links;
-}
+} #}}}
 
 # Given a page and the text of a link on the page, determine which existing
 # page that link best points to. Prefers pages under a subdirectory with
 # the same name as the source page, failing that goes down the directory tree
 # to the base looking for matching pages.
-sub bestlink ($$) {
+sub bestlink ($$) { #{{{
 	my $page=shift;
 	my $link=lc(shift);
 	
@@ -154,49 +159,54 @@ sub bestlink ($$) {
 		}
 	} while $cwd=~s!/?[^/]+$!!;
 
-	print STDERR "warning: page $page, broken link: $link\n";
+	#print STDERR "warning: page $page, broken link: $link\n";
 	return "";
-}
+} #}}}
 
-sub isinlinableimage ($) {
+sub isinlinableimage ($) { #{{{
 	my $file=shift;
 	
 	$file=~/\.(png|gif|jpg|jpeg)$/;
-}
+} #}}}
 
-sub htmllink ($$) {
+sub htmllink { #{{{
 	my $page=shift;
 	my $link=shift;
+	my $noimagelink=shift;
 
 	my $bestlink=bestlink($page, $link);
 
 	return $link if $page eq $bestlink;
 	
+	# TODO BUG: %renderedfiles may not have it, if the linked to page
+	# was also added and isn't yet rendered! Note that this bug is
+	# masked by the bug mentioned below that makes all new files
+	# be rendered twice.
 	if (! grep { $_ eq $bestlink } values %renderedfiles) {
 		$bestlink=htmlpage($bestlink);
 	}
 	if (! grep { $_ eq $bestlink } values %renderedfiles) {
-		return "<a href=\"?\">?</a>$link"
+		return "<a href=\"$cgiurl?do=create&page=$link&from=$page\">?</a>$link"
 	}
 	
 	$bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 	
-	if (isinlinableimage($bestlink)) {
+	if (! $noimagelink && isinlinableimage($bestlink)) {
 		return "<img src=\"$bestlink\">";
 	}
 	return "<a href=\"$bestlink\">$link</a>";
-}
+} #}}}
 
-sub linkify ($$) {
+sub linkify ($$) { #{{{
 	my $content=shift;
 	my $file=shift;
 
-	$content =~ s/$link/htmllink(pagename($file), $1)/eg;
+	$content =~ s/$wiki_link_regexp/htmllink(pagename($file), $1)/eg;
 	
 	return $content;
-}
+} #}}}
 
-sub htmlize ($$) {
+sub htmlize ($$) { #{{{
 	my $type=shift;
 	my $content=shift;
 	
@@ -206,58 +216,94 @@ sub htmlize ($$) {
 	else {
 		error("htmlization of $type not supported");
 	}
-}
+} #}}}
 
-sub linkbacks ($$) {
-	my $content=shift;
+sub backlinks ($) { #{{{
 	my $page=shift;
 
 	my @links;
 	foreach my $p (keys %links) {
-		if (grep { $_ eq $page } @{$links{$p}}) {
+		next if bestlink($page, $p) eq $page;
+		if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 			my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
-			push @links, "<a href=\"$href\">$p</a>";
+			
+			# Trim common dir prefixes from both pages.
+			my $p_trimmed=$p;
+			my $page_trimmed=$page;
+			my $dir;
+			1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
+			        defined $dir &&
+			        $p_trimmed=~s/^\Q$dir\E// &&
+			        $page_trimmed=~s/^\Q$dir\E//;
+				       
+			push @links, { url => $href, page => $p_trimmed };
 		}
 	}
 
-	$content.="<hr><p>Links: ".join(" ", sort @links)."</p>\n" if @links;
-	return $content;
-}
-
-sub finalize ($$) {
-	my $content=shift;
+	return @links;
+} #}}}
+	
+sub parentlinks ($) { #{{{
 	my $page=shift;
-
-	my $title=basename($page);
-	$title=~s/_/ /g;
 	
+	my @ret;
 	my $pagelink="";
 	my $path="";
+	my $skip=1;
 	foreach my $dir (reverse split("/", $page)) {
-		if (length($pagelink)) {
-			$pagelink="<a href=\"$path$dir.html\">$dir</a>/ $pagelink";
+		if (! $skip) {
+			unshift @ret, { url => "$path$dir.html", page => $dir };
 		}
 		else {
-			$pagelink=$dir;
+			$skip=0;
 		}
 		$path.="../";
 	}
-	$path=~s/\.\.\/$/index.html/;
-	$pagelink="<a href=\"$path\">$wikiname</a>/ $pagelink";
+	return @ret;
+} #}}}
+
+sub indexlink () { #{{{
+	return "<a href=\"$url\">$wikiname</a>/ ";
+} #}}}
+	
+sub finalize ($$) { #{{{
+	my $content=shift;
+	my $page=shift;
+
+	my $title=basename($page);
+	$title=~s/_/ /g;
 	
-	$content="<html>\n<head><title>$title</title></head>\n<body>\n".
-	          "<h1>$pagelink</h1>\n".
-	          $content.
-	          "</body>\n</html>\n";
+	my $template=HTML::Template->new(blind_cache => 1,
+		filename => "$templatedir/page.tmpl");
 	
-	return $content;
-}
+	if (length $cgiurl) {
+		$template->param(editurl => "$cgiurl?do=edit&page=$page");
+		$template->param(recentchangesurl => "$cgiurl?do=recentchanges");
+	}
+
+	if (length $historyurl) {
+		my $u=$historyurl;
+		$u=~s/\[\[\]\]/$pagesources{$page}/g;
+		$template->param(historyurl => $u);
+	}
+	
+	$template->param(
+		title => $title,
+		indexlink => $url,
+		wikiname => $wikiname,
+		parentlinks => [parentlinks($page)],
+		content => $content,
+		backlinks => [backlinks($page)],
+	);
+	
+	return $template->output;
+} #}}}
 
-sub render ($) {
+sub render ($) { #{{{
 	my $file=shift;
 	
 	my $type=pagetype($file);
-	my $content=readpage($file);
+	my $content=readfile("$srcdir/$file");
 	if ($type ne 'unknown') {
 		my $page=pagename($file);
 		
@@ -265,48 +311,140 @@ sub render ($) {
 		
 		$content=linkify($content, $file);
 		$content=htmlize($type, $content);
-		$content=linkbacks($content, $page);
 		$content=finalize($content, $page);
 		
-		writepage(htmlpage($page), $content);
+		writefile("$destdir/".htmlpage($page), $content);
 		$oldpagemtime{$page}=time;
 		$renderedfiles{$page}=htmlpage($page);
 	}
 	else {
 		$links{$file}=[];
-		writepage($file, $content);
+		writefile("$destdir/$file", $content);
 		$oldpagemtime{$file}=time;
 		$renderedfiles{$file}=$file;
 	}
-}
+} #}}}
 
-sub loadindex () {
-	open (IN, "$srcdir/.index") || return;
+sub loadindex () { #{{{
+	open (IN, "$srcdir/.ikiwiki/index") || return;
 	while (<IN>) {
-		($_)=/(.*)/; # untaint
+		$_=possibly_foolish_untaint($_);
 		chomp;
 		my ($mtime, $file, $rendered, @links)=split(' ', $_);
 		my $page=pagename($file);
 		$pagesources{$page}=$file;
 		$oldpagemtime{$page}=$mtime;
-		$links{$page}=[@links];
 		$oldlinks{$page}=[@links];
+		$links{$page}=[@links];
 		$renderedfiles{$page}=$rendered;
 	}
 	close IN;
-}	
+} #}}}
 
-sub saveindex () {
-	open (OUT, ">$srcdir/.index") || error("cannot write to .index: $!");
+sub saveindex () { #{{{
+	if (! -d "$srcdir/.ikiwiki") {
+		mkdir("$srcdir/.ikiwiki");
+	}
+	open (OUT, ">$srcdir/.ikiwiki/index") || error("cannot write to index: $!");
 	foreach my $page (keys %oldpagemtime) {
-	print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
-	          join(" ", @{$links{$page}})."\n"
-			if $oldpagemtime{$page};
+		print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
+	        	join(" ", @{$links{$page}})."\n"
+				if $oldpagemtime{$page};
 	}
 	close OUT;
-}
+} #}}}
 
-sub prune ($) {
+sub rcs_update () { #{{{
+	if (-d "$srcdir/.svn") {
+		if (system("svn", "update", "--quiet", $srcdir) != 0) {
+			warn("svn update failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_commit ($) { #{{{
+	my $message=shift;
+
+	if (-d "$srcdir/.svn") {
+		if (system("svn", "commit", "--quiet", "-m",
+		           possibly_foolish_untaint($message), $srcdir) != 0) {
+			warn("svn commit failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_add ($) { #{{{
+	my $file=shift;
+
+	if (-d "$srcdir/.svn") {
+		my $parent=dirname($file);
+		while (! -d "$srcdir/$parent/.svn") {
+			$file=$parent;
+			$parent=dirname($file);
+		}
+		
+		if (system("svn", "add", "--quiet", "$srcdir/$file") != 0) {
+			warn("svn add failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_recentchanges ($) { #{{{
+	my $num=shift;
+	my @ret;
+	
+	eval q{use Date::Parse};
+	eval q{use Time::Duration};
+	
+	if (-d "$srcdir/.svn") {
+		my $info=`LANG=C svn info $srcdir`;
+		my ($svn_url)=$info=~/^URL: (.*)$/m;
+
+		# FIXME: currently assumes that the wiki is somewhere
+		# under trunk in svn, doesn't support other layouts.
+		my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
+		
+		my $div=qr/^--------------------+$/;
+		my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
+		my $state='start';
+		my ($rev, $user, $when, @pages, $message);
+		foreach (`LANG=C svn log -v '$svn_url'`) {
+			chomp;
+			if ($state eq 'start' && /$div/) {
+				$state='header';
+			}
+			elsif ($state eq 'header' && /$infoline/) {
+				$rev=$1;
+				$user=$2;
+				$when=concise(ago(time - str2time($3)));
+		    	}
+			elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/(.+)$/) {
+				push @pages, { link => htmllink("", pagename($1), 1) }
+					if length $1;
+			}
+			elsif ($state eq 'header' && /^$/) {
+				$state='body';
+			}
+			elsif ($state eq 'body' && /$div/) {
+				push @ret, { rev => $rev, user => $user,
+					when => $when, message => $message,
+					pages => [@pages] } if @pages;
+				return @ret if @ret >= $num;
+				
+				$state='header';
+				$message=$rev=$user=$when=undef;
+				@pages=();
+			}
+			elsif ($state eq 'body') {
+				$message.="$_<br>\n";
+			}
+		}
+	}
+
+	return @ret;
+} #}}}
+
+sub prune ($) { #{{{
 	my $file=shift;
 
 	unlink($file);
@@ -314,20 +452,20 @@ sub prune ($) {
 	while (rmdir($dir)) {
 		$dir=dirname($dir);
 	}
-}
+} #}}}
 
-sub refresh () {
+sub refresh () { #{{{
 	# Find existing pages.
 	my %exists;
 	my @files;
 	find({
 		no_chdir => 1,
 		wanted => sub {
-			if (/\/\.svn\//) {
+			if (/$wiki_file_prune_regexp/) {
 				$File::Find::prune=1;
 			}
-			elsif (! -d $_ && ! /\.html$/ && ! /\/\./) {
-				my ($f)=/(^[-A-Za-z0-9_.:\/+]+$)/; # untaint
+			elsif (! -d $_) {
+				my ($f)=/$wiki_file_regexp/; # untaint
 				if (! defined $f) {
 					warn("skipping bad filename $_\n");
 				}
@@ -361,6 +499,7 @@ sub refresh () {
 			prune($destdir."/".$renderedfiles{$page});
 			delete $renderedfiles{$page};
 			$oldpagemtime{$page}=0;
+			delete $pagesources{$page};
 		}
 	}
 	
@@ -374,18 +513,15 @@ sub refresh () {
 			render($file);
 			$rendered{$file}=1;
 		}
-		elsif ($rebuild) {
-			debug("rebuilding unchanged file $file");
-			render($file);
-			$rendered{$file}=1;
-		}
 	}
 	
 	# if any files were added or removed, check to see if each page
 	# needs an update due to linking to them
+	# TODO: inefficient; pages may get rendered above and again here;
+	# problem is the bestlink may have changed and we won't know until
+	# now
 	if (@add || @del) {
 FILE:		foreach my $file (@files) {
-			next if $rendered{$file};
 			my $page=pagename($file);
 			foreach my $f (@add, @del) {
 				my $p=pagename($f);
@@ -393,6 +529,7 @@ FILE:		foreach my $file (@files) {
 					if (bestlink($page, $link) eq $p) {
 		   				debug("rendering $file, which links to $p");
 						render($file);
+						$rendered{$file}=1;
 						next FILE;
 					}
 				}
@@ -400,27 +537,31 @@ FILE:		foreach my $file (@files) {
 		}
 	}
 
-	# handle linkbacks; if a page has added/removed links, update the
+	# handle backlinks; if a page has added/removed links, update the
 	# pages it links to
 	# TODO: inefficient; pages may get rendered above and again here;
-	# problem is the linkbacks could be wrong in the first pass render
-	# above.
+	# problem is the backlinks could be wrong in the first pass render
+	# above
 	if (%rendered) {
 		my %linkchanged;
 		foreach my $file (keys %rendered, @del) {
-			my $pagename=pagename($file);
-			if (exists $links{$pagename}) {
-				foreach my $link (@{$links{$pagename}}) {
-					if (! exists $oldlinks{$pagename} ||
-					    ! grep { $_ eq $link } @{$oldlinks{$pagename}}) {
+			my $page=pagename($file);
+			if (exists $links{$page}) {
+				foreach my $link (@{$links{$page}}) {
+					$link=bestlink($page, $link);
+					if (length $link &&
+					    ! exists $oldlinks{$page} ||
+					    ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 						$linkchanged{$link}=1;
 					}
 				}
 			}
-			if (exists $oldlinks{$pagename}) {
-				foreach my $link (@{$oldlinks{$pagename}}) {
-					if (! exists $links{$pagename} ||
-					    ! grep { $_ eq $link } @{$links{$pagename}}) {
+			if (exists $oldlinks{$page}) {
+				foreach my $link (@{$oldlinks{$page}}) {
+					$link=bestlink($page, $link);
+					if (length $link &&
+					    ! exists $links{$page} ||
+					    ! grep { $_ eq $link } @{$links{$page}}) {
 						$linkchanged{$link}=1;
 					}
 				}
@@ -429,13 +570,390 @@ FILE:		foreach my $file (@files) {
 		foreach my $link (keys %linkchanged) {
 		    	my $linkfile=$pagesources{$link};
 			if (defined $linkfile) {
-				debug("rendering $linkfile, to update its linkbacks");
+				debug("rendering $linkfile, to update its backlinks");
 				render($linkfile);
 			}
 		}
 	}
+} #}}}
+
+# Generates a C wrapper program for running ikiwiki in a specific way.
+# The wrapper may be safely made suid.
+sub gen_wrapper ($$) { #{{{
+	my ($svn, $rebuild)=@_;
+
+	eval q{use Cwd 'abs_path'};
+	$srcdir=abs_path($srcdir);
+	$destdir=abs_path($destdir);
+	my $this=abs_path($0);
+	if (! -x $this) {
+		error("$this doesn't seem to be executable");
+	}
+
+	my @params=($srcdir, $templatedir, $destdir, "--wikiname=$wikiname");
+	push @params, "--verbose" if $verbose;
+	push @params, "--rebuild" if $rebuild;
+	push @params, "--nosvn" if !$svn;
+	push @params, "--cgi" if $cgi;
+	push @params, "--url=$url" if $url;
+	push @params, "--cgiurl=$cgiurl" if $cgiurl;
+	push @params, "--historyurl=$historyurl" if $historyurl;
+	push @params, "--anonok" if $anonok;
+	my $params=join(" ", @params);
+	my $call='';
+	foreach my $p ($this, $this, @params) {
+		$call.=qq{"$p", };
+	}
+	$call.="NULL";
+	
+	my @envsave;
+	push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
+	               CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
+		       HTTP_COOKIE} if $cgi;
+	my $envsave="";
+	foreach my $var (@envsave) {
+		$envsave.=<<"EOF"
+	if ((s=getenv("$var")))
+		asprintf(&newenviron[i++], "%s=%s", "$var", s);
+EOF
+	}
+	
+	open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
+	print OUT <<"EOF";
+/* A wrapper for ikiwiki, can be safely made suid. */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+extern char **environ;
+
+int main (int argc, char **argv) {
+	/* Sanitize environment. */
+	char *s;
+	char *newenviron[$#envsave+3];
+	int i=0;
+$envsave
+	newenviron[i++]="HOME=$ENV{HOME}";
+	newenviron[i]=NULL;
+	environ=newenviron;
+
+	if (argc == 2 && strcmp(argv[1], "--params") == 0) {
+		printf("$params\\n");
+		exit(0);
+	}
+	
+	execl($call);
+	perror("failed to run $this");
+	exit(1);
+}
+EOF
+	close OUT;
+	if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
+		error("failed to compile ikiwiki-wrap.c");
+	}
+	unlink("ikiwiki-wrap.c");
+	print "successfully generated ikiwiki-wrap\n";
+	exit 0;
+} #}}}
+
+sub cgi_recentchanges ($) { #{{{
+	my $q=shift;
+	
+	my $template=HTML::Template->new(
+		filename => "$templatedir/recentchanges.tmpl");
+	$template->param(
+		title => "RecentChanges",
+		indexlink => $url,
+		wikiname => $wikiname,
+		changelog => [rcs_recentchanges(100)],
+	);
+	print $q->header, $template->output;
+} #}}}
+
+sub cgi_signin ($$) { #{{{
+	my $q=shift;
+	my $session=shift;
+
+	eval q{use CGI::FormBuilder};
+	my $form = CGI::FormBuilder->new(
+		title => "$wikiname signin",
+		fields => [qw(do page name password confirm_password email)],
+		header => 1,
+		method => 'POST',
+		validate => {
+			name => '/^\w+$/',
+			confirm_password => {
+				perl => q{eq $form->field("password")},
+			},
+			email => 'EMAIL',
+		},
+		required => 'NONE',
+		javascript => 0,
+		params => $q,
+		action => $q->request_uri,
+	);
+	
+	$form->sessionid($session->id);
+	$form->field(name => "name", required => 0);
+	$form->field(name => "do", type => "hidden");
+	$form->field(name => "page", type => "hidden");
+	$form->field(name => "password", type => "password", required => 0);
+	$form->field(name => "confirm_password", type => "password", required => 0);
+	$form->field(name => "email", required => 0);
+	if ($session->param("name")) {
+		$form->field(name => "name", value => $session->param("name"));
+	}
+	if ($q->param("do") ne "signin") {
+		$form->text("You need to log in before you can edit pages.");
+	}
+	
+	if ($form->submitted) {
+		# Set required fields based on how form was submitted.
+		my %required=(
+			"Login" => [qw(name password)],
+			"Register" => [qw(name password confirm_password email)],
+			"Mail Password" => [qw(name)],
+		);
+		foreach my $opt (@{$required{$form->submitted}}) {
+			$form->field(name => $opt, required => 1);
+		}
+	
+		# Validate password differently depending on how form was
+		# submitted.
+		if ($form->submitted eq 'Login') {
+			$form->field(
+				name => "password",
+				validate => sub {
+					# TODO get real user password
+					shift eq "foo";
+				},
+			);
+		}
+		else {
+			$form->field(name => "password", validate => 'VALUE');
+		}
+	}
+	else {
+		# Comments only shown first time.
+		$form->field(name => "name", comment => "use FirstnameLastName");
+		$form->field(name => "confirm_password", comment => "(only needed");
+		$form->field(name => "email",            comment => "for registration)");
+	}
+
+	if ($form->submitted && $form->validate) {
+		if ($form->submitted eq 'Login') {
+			$session->param("name", $form->field("name"));
+			if (defined $form->field("do")) {
+				$q->redirect(
+					"$cgiurl?do=".$form->field("do").
+					"&page=".$form->field("page"));
+			}
+			else {
+				$q->redirect($url);
+			}
+		}
+		elsif ($form->submitted eq 'Register') {
+			# TODO: save registration info
+			$form->field(name => "confirm_password", type => "hidden");
+			$form->field(name => "email", type => "hidden");
+			$form->text("Registration successful. Now you can Login.");
+			print $form->render(submit => ["Login"]);;
+		}
+		elsif ($form->submitted eq 'Mail Password') {
+			# TODO mail password
+			$form->text("Your password has been emailed to you.");
+			print $form->render(submit => ["Login", "Register", "Mail Password"]);;
+		}
+	}
+	else {
+		print $form->render(submit => ["Login", "Register", "Mail Password"]);;
+	}
+} #}}}
+
+sub cgi () { #{{{
+	eval q{use CGI};
+	eval q{use CGI::Session};
+	
+	my $q=CGI->new;
+	# session id has to be _sessionid for CGI::FormBuilder to work.
+	# TODO: stop having the formbuilder emit cookies and change session
+	# id to something else.
+	CGI::Session->name("_sessionid");
+	my $session = CGI::Session->new(undef, $q,
+		{ Directory=> "$srcdir/.ikiwiki/sessions" });
+	
+	my $do=$q->param('do');
+	if (! defined $do || ! length $do) {
+		error("\"do\" parameter missing");
+	}
+	
+	if ($do eq 'recentchanges') {
+		cgi_recentchanges($q);
+		return;
+	}
+	
+	if ((! $anonok && ! defined $session->param("name")) || $do eq 'signin') {
+		cgi_signin($q, $session);
+		return;
+	}
+	
+	my ($page)=$q->param('page')=~/$wiki_file_regexp/;
+	if (! defined $page || ! length $page || $page ne $q->param('page') ||
+	    $page=~/$wiki_file_prune_regexp/ || $page=~/^\//) {
+		error("bad page name");
+	}
+	$page=lc($page);
+	
+	my $action=$q->request_uri;
+	$action=~s/\?.*//;
+	
+	if ($do eq 'create') {
+		if (exists $pagesources{lc($page)}) {
+			# hmm, someone else made the page in the meantime?
+			print $q->redirect("$url/".htmlpage($page));
+		}
+
+		my @page_locs;
+		my ($from)=$q->param('from')=~/$wiki_file_regexp/;
+		if (! defined $from || ! length $from ||
+		    $from ne $q->param('from') ||
+		    $from=~/$wiki_file_prune_regexp/ || $from=~/^\//) {
+			@page_locs=$page;
+		}
+		else {
+			my $dir=$from."/";
+			$dir=~s![^/]+/$!!;
+			push @page_locs, $dir.$page;
+			push @page_locs, "$from/$page";
+			while (length $dir) {
+				$dir=~s![^/]+/$!!;
+				push @page_locs, $dir.$page;
+			}
+		}
+		
+		$q->param("do", "save");
+		print $q->header,
+		      $q->start_html("Creating $page"),
+		      $q->h1(indexlink()." Creating $page"),
+		      $q->start_form(-action => $action),
+		      $q->hidden('do'),
+		      "Select page location:",
+		      $q->popup_menu('page', \@page_locs),
+		      $q->textarea(-name => 'content',
+		               -default => "",
+		               -rows => 20,
+		               -columns => 80),
+		      $q->br,
+		      "Optional comment about this change:",
+		      $q->br,
+		      $q->textfield(-name => "comments", -size => 80),
+		      $q->br,
+		      $q->submit("Save Page"),
+		      $q->end_form,
+		      $q->end_html;
+	}
+	elsif ($do eq 'edit') {
+		my $content="";
+		if (exists $pagesources{lc($page)}) {
+			$content=readfile("$srcdir/$pagesources{lc($page)}");
+			$content=~s/\n/\r\n/g;
+		}
+		$q->param("do", "save");
+		print $q->header,
+		      $q->start_html("Editing $page"),
+		      $q->h1(indexlink()." Editing $page"),
+		      $q->start_form(-action => $action),
+		      $q->hidden('do'),
+		      $q->hidden('page'),
+		      $q->textarea(-name => 'content',
+		               -default => $content,
+		               -rows => 20,
+		               -columns => 80),
+		      $q->br,
+		      "Optional comment about this change:",
+		      $q->br,
+		      $q->textfield(-name => "comments", -size => 80),
+		      $q->br,
+		      $q->submit("Save Page"),
+		      $q->end_form,
+		      $q->end_html;
+	}
+	elsif ($do eq 'save') {
+		my $file=$page.$default_pagetype;
+		my $newfile=1;
+		if (exists $pagesources{lc($page)}) {
+			$file=$pagesources{lc($page)};
+			$newfile=0;
+		}
+		
+		my $content=$q->param('content');
+		$content=~s/\r\n/\n/g;
+		$content=~s/\r/\n/g;
+		writefile("$srcdir/$file", $content);
+		
+		my $message="web commit from $ENV{REMOTE_ADDR}";
+		if (defined $q->param('comments')) {
+			$message.=": ".$q->param('comments');
+		}
+		
+		if ($svn) {
+			if ($newfile) {
+				rcs_add($file);
+			}
+			# presumably the commit will trigger an update
+			# of the wiki
+			rcs_commit($message);
+		}
+		else {
+			refresh();
+		}
+		
+		print $q->redirect("$url/".htmlpage($page));
+	}
+	else {
+		error("unknown do parameter");
+	}
+} #}}}
+
+# main {{{
+my $rebuild=0;
+my $wrapper=0;
+if (grep /^-/, @ARGV) {
+	eval {use Getopt::Long};
+	GetOptions(
+		"wikiname=s" => \$wikiname,
+		"verbose|v" => \$verbose,
+		"rebuild" => \$rebuild,
+		"wrapper" => \$wrapper,
+		"svn!" => \$svn,
+		"anonok!" => \$anonok,
+		"cgi" => \$cgi,
+		"url=s" => \$url,
+		"cgiurl=s" => \$cgiurl,
+		"historyurl=s" => \$historyurl,
+	) || usage();
 }
+usage() unless @ARGV == 3;
+($srcdir) = possibly_foolish_untaint(shift);
+($templatedir) = possibly_foolish_untaint(shift);
+($destdir) = possibly_foolish_untaint(shift);
 
-loadindex();
-refresh();
-saveindex();
+if ($cgi && ! length $url) {
+	error("Must specify url to wiki with --url when using --cgi");
+}
+
+gen_wrapper($svn, $rebuild) if $wrapper;
+memoize('pagename');
+memoize('bestlink');
+loadindex() unless $rebuild;
+if ($cgi) {
+	cgi();
+}
+else {
+	rcs_update() if $svn;
+	refresh();
+	saveindex();
+}
+#}}}