X-Git-Url: http://git.tremily.us/?p=ikiwiki.git;a=blobdiff_plain;f=ikiwiki;h=4e64e4031d0d5996f68d072d4bac06e6a3aa4da4;hp=08d1c4f81618a9fbfa928fd88a907b7c5624753f;hb=4796acdae76a294199e8d8152c3c9ed53db808a2;hpb=198c2d9c45cb974aabf999797bdb7d6ab8636b2c

diff --git a/ikiwiki b/ikiwiki
index 08d1c4f81..4e64e4031 100755
--- a/ikiwiki
+++ b/ikiwiki
@@ -1,72 +1,118 @@
 #!/usr/bin/perl -T
+$ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
 
 use warnings;
 use strict;
-use File::Find;
 use Memoize;
 use File::Spec;
+use HTML::Template;
+use Getopt::Long;
 
-BEGIN {
-	$blosxom::version="is a proper perl module too much to ask?";
-	do "/usr/bin/markdown";
-}
+my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
 
-memoize('pagename');
-memoize('bestlink');
+my %config=( #{{{
+	wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$)},
+	wiki_link_regexp => qr/\[\[([^\s]+)\]\]/,
+	wiki_file_regexp => qr/(^[-A-Za-z0-9_.:\/+]+$)/,
+	verbose => 0,
+	wikiname => "wiki",
+	default_pageext => ".mdwn",
+	cgi => 0,
+	svn => 1,
+	url => '',
+	cgiurl => '',
+	historyurl => '',
+	anonok => 0,
+	rebuild => 0,
+	wrapper => undef,
+	wrappermode => undef,
+	srcdir => undef,
+	destdir => undef,
+	templatedir => undef,
+	setup => undef,
+); #}}}
 
-sub usage {
-	die "usage: ikiwiki [options] source dest\n";
-}
+GetOptions( #{{{
+	"setup=s" => \$config{setup},
+	"wikiname=s" => \$config{wikiname},
+	"verbose|v!" => \$config{verbose},
+	"rebuild!" => \$config{rebuild},
+	"wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
+	"wrappermode=i" => \$config{wrappermode},
+	"svn!" => \$config{svn},
+	"anonok!" => \$config{anonok},
+	"cgi!" => \$config{cgi},
+	"url=s" => \$config{url},
+	"cgiurl=s" => \$config{cgiurl},
+	"historyurl=s" => \$config{historyurl},
+	"exclude=s@" => sub {
+		$config{wiki_file_prune_regexp}=qr/$config{wiki_file_prune_regexp}|$_[1]/;
+	},
+) || usage();
 
-my $link=qr/\[\[([^\s]+)\]\]/;
-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();
+if (! $config{setup}) {
+	usage() unless @ARGV == 3;
+	$config{srcdir} = possibly_foolish_untaint(shift);
+	$config{templatedir} = possibly_foolish_untaint(shift);
+	$config{destdir} = possibly_foolish_untaint(shift);
+	if ($config{cgi} && ! length $config{url}) {
+		error("Must specify url to wiki with --url when using --cgi");
+	}
 }
-usage() unless @ARGV == 2;
-my ($srcdir) = shift =~ /(.*)/; # untaint
-my ($destdir) = shift =~ /(.*)/; # untaint
+#}}}
 
-my %links;
-my %oldpagemtime;
-my %renderedfiles;
+sub usage { #{{{
+	die "usage: ikiwiki [options] source templates dest\n";
+} #}}}
 
-sub error ($) {
-	die @_;
-}
+sub error { #{{{
+	if ($config{cgi}) {
+		print "Content-type: text/html\n\n";
+		print misctemplate("Error", "<p>Error: @_</p>");
+		exit 1;
+	}
+	else {
+		die @_;
+	}
+} #}}}
 
-sub debug ($) {
-	print "@_\n" if $verbose;
-}
+sub debug ($) { #{{{
+	return unless $config{verbose};
+	if (! $config{cgi}) {
+		print "@_\n";
+	}
+	else {
+		print STDERR "@_\n";
+	}
+} #}}}
 
-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 ($page =~ /\.mdwn$/) {
@@ -75,38 +121,38 @@ 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)) {
@@ -117,26 +163,27 @@ 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 ($content =~ /$config{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 ($$) {
+sub bestlink ($$) { #{{{
+	# 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.
 	my $page=shift;
 	my $link=lc(shift);
 	
@@ -152,137 +199,337 @@ 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 $noimageinline=shift; # don't turn links into inline html images
+	my $createsubpage=shift; # force creation of a subpage if page DNE
 
 	my $bestlink=bestlink($page, $link);
 
-	return $link if $page eq $bestlink;
+	return $link if length $bestlink && $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"
+		if (! $createsubpage) {
+			return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
+		}
+		else {
+			return "<a href=\"$config{cgiurl}?do=create&page=$page/$link\">?</a>$link"
+		}
 	}
 	
 	$bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 	
-	if (isinlinableimage($bestlink)) {
+	if (! $noimageinline && isinlinableimage($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;
+	$content =~ s/$config{wiki_link_regexp}/htmllink(pagename($file), $1)/eg;
 	
 	return $content;
-}
+} #}}}
 
-sub htmlize ($$) {
+sub htmlize ($$) { #{{{
 	my $type=shift;
 	my $content=shift;
 	
+	if (! $INC{"/usr/bin/markdown"}) {
+		no warnings 'once';
+		$blosxom::version="is a proper perl module too much to ask?";
+		use warnings 'all';
+		do "/usr/bin/markdown";
+	}
+	
 	if ($type eq '.mdwn') {
 		return Markdown::Markdown($content);
 	}
 	else {
 		error("htmlization of $type not supported");
 	}
-}
+} #}}}
 
-sub finalize ($$) {
-	my $content=shift;
+sub backlinks ($) { #{{{
 	my $page=shift;
 
-	my $title=basename($page);
-	$title=~s/_/ /g;
+	my @links;
+	foreach my $p (keys %links) {
+		next if bestlink($page, $p) eq $page;
+		if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
+			my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
+			
+			# 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 };
+		}
+	}
+
+	return sort { $a->{page} cmp $b->{page} } @links;
+} #}}}
+	
+sub parentlinks ($) { #{{{
+	my $page=shift;
 	
+	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";
+	unshift @ret, { url => $path , page => $config{wikiname} };
+	return @ret;
+} #}}}
+
+sub indexlink () { #{{{
+	return "<a href=\"$config{url}\">$config{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 $template=HTML::Template->new(blind_cache => 1,
+		filename => "$config{templatedir}/page.tmpl");
 	
-	return $content;
-}
+	if (length $config{cgiurl}) {
+		$template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
+		if ($config{svn}) {
+			$template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
+		}
+	}
+
+	if (length $config{historyurl}) {
+		my $u=$config{historyurl};
+		$u=~s/\[\[\]\]/$pagesources{$page}/g;
+		$template->param(historyurl => $u);
+	}
+	
+	$template->param(
+		title => $title,
+		wikiname => $config{wikiname},
+		parentlinks => [parentlinks($page)],
+		content => $content,
+		backlinks => [backlinks($page)],
+		discussionlink => htmllink($page, "Discussion", 1, 1),
+	);
+	
+	return $template->output;
+} #}}}
 
-sub render ($) {
+sub check_overwrite ($$) { #{{{
+	# Important security check. Make sure to call this before saving
+	# any files to the source directory.
+	my $dest=shift;
+	my $src=shift;
+	
+	if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
+		error("$dest exists and was rendered from ".
+			join(" ",(grep { $renderedfiles{$_} eq $dest } keys
+				%renderedfiles)).
+			", not from $src before not overwriting");
+	}
+} #}}}
+		
+sub render ($) { #{{{
 	my $file=shift;
 	
 	my $type=pagetype($file);
-	my $content=readpage($file);
+	my $content=readfile("$config{srcdir}/$file");
 	if ($type ne 'unknown') {
 		my $page=pagename($file);
+		
 		$links{$page}=[findlinks($content)];
-	
+		
 		$content=linkify($content, $file);
 		$content=htmlize($type, $content);
 		$content=finalize($content, $page);
 		
-		writepage(htmlpage($page), $content);
+		check_overwrite("$config{destdir}/".htmlpage($page), $page);
+		writefile("$config{destdir}/".htmlpage($page), $content);
 		$oldpagemtime{$page}=time;
 		$renderedfiles{$page}=htmlpage($page);
 	}
 	else {
 		$links{$file}=[];
-		writepage($file, $content);
+		check_overwrite("$config{destdir}/$file", $file);
+		writefile("$config{destdir}/$file", $content);
 		$oldpagemtime{$file}=time;
 		$renderedfiles{$file}=$file;
 	}
-}
+} #}}}
 
-sub loadindex () {
-	open (IN, "$srcdir/.index") || return;
+sub loadindex () { #{{{
+	open (IN, "$config{srcdir}/.ikiwiki/index") || return;
 	while (<IN>) {
+		$_=possibly_foolish_untaint($_);
 		chomp;
-		my ($mtime, $page, $rendered, @links)=split(' ', $_);
+		my ($mtime, $file, $rendered, @links)=split(' ', $_);
+		my $page=pagename($file);
+		$pagesources{$page}=$file;
 		$oldpagemtime{$page}=$mtime;
-		$links{$page}=\@links;
-		($renderedfiles{$page})=$rendered=~m/(.*)/; # untaint
+		$oldlinks{$page}=[@links];
+		$links{$page}=[@links];
+		$renderedfiles{$page}=$rendered;
 	}
 	close IN;
-}	
+} #}}}
 
-sub saveindex () {
-	open (OUT, ">$srcdir/.index") || error("cannot write to .index: $!");
+sub saveindex () { #{{{
+	if (! -d "$config{srcdir}/.ikiwiki") {
+		mkdir("$config{srcdir}/.ikiwiki");
+	}
+	open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
 	foreach my $page (keys %oldpagemtime) {
-	print OUT "$oldpagemtime{$page} $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 ($) {
+sub rcs_update () { #{{{
+	if (-d "$config{srcdir}/.svn") {
+		if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
+			warn("svn update failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_commit ($) { #{{{
+	my $message=shift;
+
+	if (-d "$config{srcdir}/.svn") {
+		if (system("svn", "commit", "--quiet", "-m",
+		           possibly_foolish_untaint($message),
+			   $config{srcdir}) != 0) {
+			warn("svn commit failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_add ($) { #{{{
+	my $file=shift;
+
+	if (-d "$config{srcdir}/.svn") {
+		my $parent=dirname($file);
+		while (! -d "$config{srcdir}/$parent/.svn") {
+			$file=$parent;
+			$parent=dirname($file);
+		}
+		
+		if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
+			warn("svn add failed\n");
+		}
+	}
+} #}}}
+
+sub rcs_recentchanges ($) { #{{{
+	my $num=shift;
+	my @ret;
+	
+	eval q{use Date::Parse};
+	eval q{use Time::Duration};
+	
+	if (-d "$config{srcdir}/.svn") {
+		my $info=`LANG=C svn info $config{srcdir}`;
+		my ($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/) {
+				my $committype="web";
+				if (defined $message[0] &&
+				    $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
+					$user="$1";
+					$message[0]->{line}=$2;
+				}
+				else {
+					$committype="svn";
+				}
+				
+				push @ret, { rev => $rev,
+					user => htmllink("", $user, 1),
+					committype => $committype,
+					when => $when, message => [@message],
+					pages => [@pages] } if @pages;
+				return @ret if @ret >= $num;
+				
+				$state='header';
+				$rev=$user=$when=undef;
+				@pages=@message=();
+			}
+			elsif ($state eq 'body') {
+				push @message, {line => $_},
+			}
+		}
+	}
+
+	return @ret;
+} #}}}
+
+sub prune ($) { #{{{
 	my $file=shift;
 
 	unlink($file);
@@ -290,49 +537,58 @@ sub prune ($) {
 	while (rmdir($dir)) {
 		$dir=dirname($dir);
 	}
-}
+} #}}}
 
-sub refresh () {
+sub refresh () { #{{{
 	# Find existing pages.
 	my %exists;
 	my @files;
+	
+	eval q{use File::Find};
 	find({
 		no_chdir => 1,
 		wanted => sub {
-			if (/\/\.svn\//) {
+			if (/$config{wiki_file_prune_regexp}/) {
+				no warnings 'once';
 				$File::Find::prune=1;
+				use warnings "all";
 			}
-			elsif (! -d $_ && ! /\.html$/ && ! /\/\./) {
-				my ($f)=/(^[-A-Za-z0-9_.:\/+]+$)/; # untaint
+			elsif (! -d $_) {
+				my ($f)=/$config{wiki_file_regexp}/; # untaint
 				if (! defined $f) {
 					warn("skipping bad filename $_\n");
 				}
 				else {
-					$f=~s/^\Q$srcdir\E\/?//;
+					$f=~s/^\Q$config{srcdir}\E\/?//;
 					push @files, $f;
 					$exists{pagename($f)}=1;
 				}
 			}
 		},
-	}, $srcdir);
+	}, $config{srcdir});
+
+	my %rendered;
 
 	# check for added or removed pages
-	my @adddel;
+	my @add;
 	foreach my $file (@files) {
 		my $page=pagename($file);
 		if (! $oldpagemtime{$page}) {
 			debug("new page $page");
-			push @adddel, $page;
+			push @add, $file;
 			$links{$page}=[];
+			$pagesources{$page}=$file;
 		}
 	}
+	my @del;
 	foreach my $page (keys %oldpagemtime) {
 		if (! $exists{$page}) {
 			debug("removing old page $page");
-			prune($destdir."/".$renderedfiles{$page});
+			push @del, $renderedfiles{$page};
+			prune($config{destdir}."/".$renderedfiles{$page});
 			delete $renderedfiles{$page};
 			$oldpagemtime{$page}=0;
-			push @adddel, $page;
+			delete $pagesources{$page};
 		}
 	}
 	
@@ -341,34 +597,585 @@ sub refresh () {
 		my $page=pagename($file);
 		
 		if (! exists $oldpagemtime{$page} ||
-		    mtime("$srcdir/$file") > $oldpagemtime{$page}) {
+		    mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 		    	debug("rendering changed file $file");
 			render($file);
-		}
-		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
-	if (@adddel) {
+	# 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) {
 			my $page=pagename($file);
-			foreach my $p (@adddel) {
+			foreach my $f (@add, @del) {
+				my $p=pagename($f);
 				foreach my $link (@{$links{$page}}) {
 					if (bestlink($page, $link) eq $p) {
 		   				debug("rendering $file, which links to $p");
 						render($file);
+						$rendered{$file}=1;
 						next FILE;
 					}
 				}
 			}
 		}
 	}
+
+	# 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 backlinks could be wrong in the first pass render
+	# above
+	if (%rendered) {
+		my %linkchanged;
+		foreach my $file (keys %rendered, @del) {
+			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 $oldlinks{$page}) {
+				foreach my $link (@{$oldlinks{$page}}) {
+					$link=bestlink($page, $link);
+					if (length $link &&
+					    ! exists $links{$page} ||
+					    ! grep { $_ eq $link } @{$links{$page}}) {
+						$linkchanged{$link}=1;
+					}
+				}
+			}
+		}
+		foreach my $link (keys %linkchanged) {
+		    	my $linkfile=$pagesources{$link};
+			if (defined $linkfile) {
+				debug("rendering $linkfile, to update its backlinks");
+				render($linkfile);
+			}
+		}
+	}
+} #}}}
+
+sub gen_wrapper (@) { #{{{
+	my %config=(@_);
+	eval q{use Cwd 'abs_path'};
+	$config{srcdir}=abs_path($config{srcdir});
+	$config{destdir}=abs_path($config{destdir});
+	my $this=abs_path($0);
+	if (! -x $this) {
+		error("$this doesn't seem to be executable");
+	}
+
+	if ($config{setup}) {
+		error("cannot create a wrapper that uses a setup file");
+	}
+	
+	my @params=($config{srcdir}, $config{templatedir}, $config{destdir},
+		"--wikiname=$config{wikiname}");
+	push @params, "--verbose" if $config{verbose};
+	push @params, "--rebuild" if $config{rebuild};
+	push @params, "--nosvn" if !$config{svn};
+	push @params, "--cgi" if $config{cgi};
+	push @params, "--url=$config{url}" if length $config{url};
+	push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
+	push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
+	push @params, "--anonok" if $config{anonok};
+	my $params=join(" ", map { "\'$_\'" } @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 $config{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 $this");
+	exit(1);
 }
+EOF
+	close OUT;
+	if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
+		error("failed to compile ikiwiki-wrap.c");
+	}
+	unlink("ikiwiki-wrap.c");
+	if (defined $config{wrappermode} &&
+	    ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
+		error("chmod $config{wrapper}: $!");
+	}
+	print "successfully generated $config{wrapper}\n";
+} #}}}
+		
+sub misctemplate ($$) { #{{{
+	my $title=shift;
+	my $pagebody=shift;
+	
+	my $template=HTML::Template->new(
+		filename => "$config{templatedir}/misc.tmpl"
+	);
+	$template->param(
+		title => $title,
+		indexlink => indexlink(),
+		wikiname => $config{wikiname},
+		pagebody => $pagebody,
+	);
+	return $template->output;
+}#}}}
+
+sub cgi_recentchanges ($) { #{{{
+	my $q=shift;
+	
+	my $template=HTML::Template->new(
+		filename => "$config{templatedir}/recentchanges.tmpl"
+	);
+	$template->param(
+		title => "RecentChanges",
+		indexlink => indexlink(),
+		wikiname => $config{wikiname},
+		changelog => [rcs_recentchanges(100)],
+	);
+	print $q->header, $template->output;
+} #}}}
+
+sub userinfo_get ($$) { #{{{
+	my $user=shift;
+	my $field=shift;
+
+	eval q{use Storable};
+	my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
+	if (! defined $userdata || ! ref $userdata || 
+	    ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
+		return "";
+	}
+	return $userdata->{$user}->{$field};
+} #}}}
+
+sub userinfo_set ($$) { #{{{
+	my $user=shift;
+	my $info=shift;
+	
+	eval q{use Storable};
+	my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
+	if (! defined $userdata || ! ref $userdata) {
+		$userdata={};
+	}
+	$userdata->{$user}=$info;
+	my $oldmask=umask(077);
+	my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
+	umask($oldmask);
+	return $ret;
+} #}}}
+
+sub cgi_signin ($$) { #{{{
+	my $q=shift;
+	my $session=shift;
+
+	eval q{use CGI::FormBuilder};
+	my $form = CGI::FormBuilder->new(
+		title => "$config{wikiname} signin",
+		fields => [qw(do page from name password confirm_password email)],
+		header => 1,
+		method => 'POST',
+		validate => {
+			confirm_password => {
+				perl => q{eq $form->field("password")},
+			},
+			email => 'EMAIL',
+		},
+		required => 'NONE',
+		javascript => 0,
+		params => $q,
+		action => $q->request_uri,
+		header => 0,
+		template => (-e "$config{templatedir}/signin.tmpl" ?
+		              "$config{templatedir}/signin.tmpl" : "")
+	);
+	
+	$form->field(name => "name", required => 0);
+	$form->field(name => "do", type => "hidden");
+	$form->field(name => "page", type => "hidden");
+	$form->field(name => "from", type => "hidden");
+	$form->field(name => "password", type => "password", required => 0);
+	$form->field(name => "confirm_password", type => "password", required => 0);
+	$form->field(name => "email", required => 0);
+	if ($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 {
+					length $form->field("name") &&
+					shift eq userinfo_get($form->field("name"), 'password');
+				},
+			);
+			$form->field(name => "name", validate => '/^\w+$/');
+		}
+		else {
+			$form->field(name => "password", validate => 'VALUE');
+		}
+		# And make sure the entered name exists when logging
+		# in or sending email, and does not when registering.
+		if ($form->submitted eq 'Register') {
+			$form->field(
+				name => "name",
+				validate => sub {
+					my $name=shift;
+					length $name &&
+					! userinfo_get($name, "regdate");
+				},
+			);
+		}
+		else {
+			$form->field(
+				name => "name",
+				validate => sub {
+					my $name=shift;
+					length $name &&
+					userinfo_get($name, "regdate");
+				},
+			);
+		}
+	}
+	else {
+		# First time settings.
+		$form->field(name => "name", comment => "use FirstnameLastName");
+		$form->field(name => "confirm_password", comment => "(only needed");
+		$form->field(name => "email",            comment => "for registration)");
+		if ($session->param("name")) {
+			$form->field(name => "name", value => $session->param("name"));
+		}
+	}
+
+	if ($form->submitted && $form->validate) {
+		if ($form->submitted eq 'Login') {
+			$session->param("name", $form->field("name"));
+			if (defined $form->field("do") && 
+			    $form->field("do") ne 'signin') {
+				print $q->redirect(
+					"$config{cgiurl}?do=".$form->field("do").
+					"&page=".$form->field("page").
+					"&from=".$form->field("from"));;
+			}
+			else {
+				print $q->redirect($config{url});
+			}
+		}
+		elsif ($form->submitted eq 'Register') {
+			my $user_name=$form->field('name');
+			if (userinfo_set($user_name, {
+				           'email' => $form->field('email'),
+				           'password' => $form->field('password'),
+				           'regdate' => time
+				         })) {
+				$form->field(name => "confirm_password", type => "hidden");
+				$form->field(name => "email", type => "hidden");
+				$form->text("Registration successful. Now you can Login.");
+				print $session->header();
+				print misctemplate($form->title, $form->render(submit => ["Login"]));
+			}
+			else {
+				error("Error saving registration.");
+			}
+		}
+		elsif ($form->submitted eq 'Mail Password') {
+			my $user_name=$form->field("name");
+			my $template=HTML::Template->new(
+				filename => "$config{templatedir}/passwordmail.tmpl"
+			);
+			$template->param(
+				user_name => $user_name,
+				user_password => userinfo_get($user_name, "password"),
+				wikiurl => $config{url},
+				wikiname => $config{wikiname},
+				REMOTE_ADDR => $ENV{REMOTE_ADDR},
+			);
+			
+			eval q{use Mail::Sendmail};
+			my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
+			sendmail(
+				To => userinfo_get($user_name, "email"),
+				From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
+				Subject => "$config{wikiname} information",
+				Message => $template->output,
+			) or error("Failed to send mail");
+			
+			$form->text("Your password has been emailed to you.");
+			$form->field(name => "name", required => 0);
+			print $session->header();
+			print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
+		}
+	}
+	else {
+		print $session->header();
+		print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
+	}
+} #}}}
+
+sub cgi_editpage ($$) { #{{{
+	my $q=shift;
+	my $session=shift;
+
+	eval q{use CGI::FormBuilder};
+	my $form = CGI::FormBuilder->new(
+		fields => [qw(do from page content comments)],
+		header => 1,
+		method => 'POST',
+		validate => {
+			content => '/.+/',
+		},
+		required => [qw{content}],
+		javascript => 0,
+		params => $q,
+		action => $q->request_uri,
+		table => 0,
+		template => "$config{templatedir}/editpage.tmpl"
+	);
+	
+	my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
+	if (! defined $page || ! length $page || $page ne $q->param('page') ||
+	    $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
+		error("bad page name");
+	}
+	$page=lc($page);
 
-loadindex();
-refresh();
-saveindex();
+	$form->field(name => "do", type => 'hidden');
+	$form->field(name => "from", type => 'hidden');
+	$form->field(name => "page", value => "$page", force => 1);
+	$form->field(name => "comments", type => "text", size => 80);
+	$form->field(name => "content", type => "textarea", rows => 20,
+		cols => 80);
+	
+	if ($form->submitted eq "Cancel") {
+		print $q->redirect("$config{url}/".htmlpage($page));
+		return;
+	}
+	if (! $form->submitted || ! $form->validate) {
+		if ($form->field("do") eq "create") {
+			if (exists $pagesources{lc($page)}) {
+				# hmm, someone else made the page in the
+				# meantime?
+				print $q->redirect("$config{url}/".htmlpage($page));
+				return;
+			}
+			
+			my @page_locs;
+			my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
+			if (! defined $from || ! length $from ||
+			    $from ne $form->param('from') ||
+			    $from=~/$config{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;
+				}
+			}
+
+			$form->tmpl_param("page_select", 1);
+			$form->field(name => "page", type => 'select',
+				options => \@page_locs);
+			$form->title("creating $page");
+		}
+		elsif ($form->field("do") eq "edit") {
+			my $content="";
+			if (exists $pagesources{lc($page)}) {
+				$content=readfile("$config{srcdir}/$pagesources{lc($page)}");
+				$content=~s/\n/\r\n/g;
+			}
+			$form->tmpl_param("page_select", 0);
+			$form->field(name => "content", value => $content,
+				force => 1);
+			$form->field(name => "page", type => 'hidden');
+			$form->title("editing $page");
+		}
+		
+		$form->tmpl_param("can_commit", $config{svn});
+		$form->tmpl_param("indexlink", indexlink());
+		print $form->render(submit => ["Save Page", "Cancel"]);
+	}
+	else {
+		# save page
+		my $file=$page.$config{default_pageext};
+		my $newfile=1;
+		if (exists $pagesources{lc($page)}) {
+			$file=$pagesources{lc($page)};
+			$newfile=0;
+		}
+		
+		my $content=$form->field('content');
+		$content=~s/\r\n/\n/g;
+		$content=~s/\r/\n/g;
+		writefile("$config{srcdir}/$file", $content);
+		
+		my $message="web commit ";
+		if ($session->param("name")) {
+			$message.="by ".$session->param("name");
+		}
+		else {
+			$message.="from $ENV{REMOTE_ADDR}";
+		}
+		if (defined $form->field('comments') &&
+		    length $form->field('comments')) {
+			$message.=": ".$form->field('comments');
+		}
+		
+		if ($config{svn}) {
+			if ($newfile) {
+				rcs_add($file);
+			}
+			# presumably the commit will trigger an update
+			# of the wiki
+			rcs_commit($message);
+		}
+		else {
+			refresh();
+		}
+		
+		# The trailing question mark tries to avoid broken
+		# caches and get the most recent version of the page.
+		print $q->redirect("$config{url}/".htmlpage($page)."?updated");
+	}
+} #}}}
+
+sub cgi () { #{{{
+	eval q{use CGI};
+	eval q{use CGI::Session};
+	
+	my $q=CGI->new;
+	
+	my $do=$q->param('do');
+	if (! defined $do || ! length $do) {
+		error("\"do\" parameter missing");
+	}
+	
+	# This does not need a session.
+	if ($do eq 'recentchanges') {
+		cgi_recentchanges($q);
+		return;
+	}
+	
+	CGI::Session->name("ikiwiki_session");
+
+	my $oldmask=umask(077);
+	my $session = CGI::Session->new("driver:db_file", $q,
+		{ FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
+	umask($oldmask);
+	
+	# Everything below this point needs the user to be signed in.
+	if ((! $config{anonok} && ! defined $session->param("name") ||
+		! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
+		cgi_signin($q, $session);
+	
+		# Force session flush with safe umask.
+		my $oldmask=umask(077);
+		$session->flush;
+		umask($oldmask);
+		
+		return;
+	}
+	
+	if ($do eq 'create' || $do eq 'edit') {
+		cgi_editpage($q, $session);
+	}
+	else {
+		error("unknown do parameter");
+	}
+} #}}}
+
+sub setup () { # {{{
+	my $setup=possibly_foolish_untaint($config{setup});
+	open (IN, $setup) || error("read $setup: $!\n");
+	local $/=undef;
+	my $code=<IN>;
+	($code)=$code=~/(.*)/s;
+	close IN;
+	eval $code;
+	error($@) if $@;
+	print "ikiwiki setup complete\n";
+	exit;
+} #}}}
+
+# main {{{
+setup() if $config{setup};
+if ($config{wrapper}) {
+	gen_wrapper(%config);
+	exit;
+}
+memoize('pagename');
+memoize('bestlink');
+loadindex() unless $config{rebuild};
+if ($config{cgi}) {
+	cgi();
+}
+else {
+	rcs_update() if $config{svn};
+	refresh();
+	saveindex();
+}
+#}}}