X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/ca366fc9025197a5d32034a446dc35b776101d78..3bb00d142a4d31316fc6f0eb1277aa2fafe4dbe9:/IkiWiki/Render.pm?ds=sidebyside

diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index 646e254a5..a8236b954 100644
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -1,254 +1,254 @@
+#!/usr/bin/perl
+
 package IkiWiki;
 
 use warnings;
 use strict;
-use File::Spec;
+use IkiWiki;
+use Encode;
+
+my %backlinks;
+our %brokenlinks;
+my $links_calculated=0;
+
+sub calculate_links () {
+	return if $links_calculated;
+	%backlinks=%brokenlinks=();
+	foreach my $page (keys %links) {
+		foreach my $link (@{$links{$page}}) {
+			my $bestlink=bestlink($page, $link);
+			if (length $bestlink) {
+				$backlinks{$bestlink}{$page}=1
+					if $bestlink ne $page;
+			}
+			else {
+				push @{$brokenlinks{$link}}, $page;
+			}
+		}
+	}
+	$links_calculated=1;
+}
 
-sub linkify ($$) { #{{{
-	my $content=shift;
+sub backlink_pages ($) {
 	my $page=shift;
 
-	$content =~ s{(\\?)$config{wiki_link_regexp}}{
-		$1 ? "[[$2]]" : htmllink($page, $2)
-	}eg;
-	
-	return $content;
-} #}}}
+	calculate_links();
 
-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 $type not supported");
-	}
-} #}}}
+	return keys %{$backlinks{$page}};
+}
 
-sub backlinks ($) { #{{{
+sub backlinks ($) {
 	my $page=shift;
 
 	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 };
-		}
+	foreach my $p (backlink_pages($page)) {
+		my $href=urlto($p, $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 => $href, page => pagetitle($p_trimmed) };
 	}
+	return @links;
+}
 
-	return sort { $a->{page} cmp $b->{page} } @links;
-} #}}}
-
-sub parentlinks ($) { #{{{
+sub genpage ($$) {
 	my $page=shift;
-	
-	my @ret;
-	my $pagelink="";
-	my $path="";
-	my $skip=1;
-	foreach my $dir (reverse split("/", $page)) {
-		if (! $skip) {
-			$path.="../";
-			unshift @ret, { url => "$path$dir.html", page => $dir };
-		}
-		else {
-			$skip=0;
-		}
-	}
-	unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
-	return @ret;
-} #}}}
-
-sub rsspage ($) { #{{{
-	my $page=shift;
-
-	return $page.".rss";
-} #}}}
-
-sub genpage ($$$) { #{{{
 	my $content=shift;
-	my $page=shift;
-	my $mtime=shift;
 
-	my $title=pagetitle(basename($page));
-	
-	my $template=HTML::Template->new(blind_cache => 1,
-		filename => "$config{templatedir}/page.tmpl");
-	
-	if (length $config{cgiurl}) {
-		$template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
-		$template->param(prefsurl => "$config{cgiurl}?do=prefs");
-		if ($config{rcs}) {
-			$template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
+	my $templatefile;
+	run_hooks(templatefile => sub {
+		return if defined $templatefile;
+		my $file=shift->(page => $page);
+		if (defined $file && defined template_file($file)) {
+			$templatefile=$file;
 		}
-	}
+	});
+	my $template=template(defined $templatefile ? $templatefile : 'page.tmpl', blind_cache => 1);
+	my $actions=0;
 
-	if (length $config{historyurl}) {
+	if (length $config{cgiurl}) {
+		$template->param(editurl => cgiurl(do => "edit", page => $page))
+			if IkiWiki->can("cgi_editpage");
+		$template->param(prefsurl => cgiurl(do => "prefs"))
+			if exists $hooks{auth};
+		$actions++;
+	}
+		
+	if (defined $config{historyurl} && length $config{historyurl}) {
 		my $u=$config{historyurl};
 		$u=~s/\[\[file\]\]/$pagesources{$page}/g;
 		$template->param(historyurl => $u);
+		$actions++;
+	}
+	if ($config{discussion}) {
+		if ($page !~ /.*\/\Q$config{discussionpage}\E$/ &&
+		   (length $config{cgiurl} ||
+		    exists $links{$page."/".$config{discussionpage}})) {
+			$template->param(discussionlink => htmllink($page, $page, $config{discussionpage}, noimageinline => 1, forcesubpage => 1));
+			$actions++;
+		}
 	}
 
-	if ($config{rss}) {
-		$template->param(rssurl => rsspage($page));
+	if ($actions) {
+		$template->param(have_actions => 1);
 	}
-	
+
+	my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
+	my ($backlinks, $more_backlinks);
+	if (@backlinks <= $config{numbacklinks} || ! $config{numbacklinks}) {
+		$backlinks=\@backlinks;
+		$more_backlinks=[];
+	}
+	else {
+		$backlinks=[@backlinks[0..$config{numbacklinks}-1]];
+		$more_backlinks=[@backlinks[$config{numbacklinks}..$#backlinks]];
+	}
+
 	$template->param(
-		title => $title,
+		title => $page eq 'index' 
+			? $config{wikiname} 
+			: pagetitle(basename($page)),
 		wikiname => $config{wikiname},
-		parentlinks => [parentlinks($page)],
 		content => $content,
-		backlinks => [backlinks($page)],
-		discussionlink => htmllink($page, "Discussion", 1, 1),
-		mtime => scalar(gmtime($mtime)),
+		backlinks => $backlinks,
+		more_backlinks => $more_backlinks,
+		mtime => displaytime($pagemtime{$page}),
+		ctime => displaytime($pagectime{$page}),
+		baseurl => baseurl($page),
 	);
-	
-	return $template->output;
-} #}}}
 
-sub date_822 ($) { #{{{
-	my $time=shift;
+	run_hooks(pagetemplate => sub {
+		shift->(page => $page, destpage => $page, template => $template);
+	});
+	
+	$content=$template->output;
+	
+	run_hooks(postscan => sub {
+		shift->(page => $page, content => $content);
+	});
 
-	eval q{use POSIX};
-	return POSIX::strftime("%a, %d %b %Y %H:%M:%S %z", localtime($time));
-} #}}}
+	run_hooks(format => sub {
+		$content=shift->(
+			page => $page,
+			content => $content,
+		);
+	});
 
-sub absolute_urls ($$) { #{{{
-	my $content=shift;
-	my $url=shift;
-
-	$url=~s/[^\/]+$//;
-	
-	$content=~s{<a\s+href="([^"]+)"}{
-		"<a href=\"$url$1\""
-	}ieg;
-	$content=~s{<img\s+src="([^"]+)"}{
-		"<img src=\"$url$1\""
-	}ieg;
 	return $content;
-} #}}}
+}
 
-sub genrss ($$$) { #{{{
-	my $content=shift;
-	my $page=shift;
-	my $mtime=shift;
+sub scan ($) {
+	my $file=shift;
 
-	my $url="$config{url}/".htmlpage($page);
-	
-	my $template=HTML::Template->new(blind_cache => 1,
-		filename => "$config{templatedir}/rsspage.tmpl");
-	
-	# Regular page gets a feed that is updated every time the
-	# page is changed, so the mtime is encoded in the guid.
-	my @items=(
-		{
-			itemtitle => pagetitle(basename($page)),
-			itemguid => "$url?mtime=$mtime",
-			itemurl => $url,
-			itempubdate => date_822($mtime),
-			itemcontent => absolute_urls($content, $url), # rss sucks
-		},
-	);
-	
-	$template->param(
-		title => pagetitle(basename($page)),
-		pageurl => $url,
-		items => \@items,
-	);
-	
-	return $template->output;
-} #}}}
-
-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 already exists and was rendered from ".
-			join(" ",(grep { $renderedfiles{$_} eq $dest } keys
-				%renderedfiles)).
-			", before, so not rendering from $src");
-	}
-} #}}}
+	my $type=pagetype($file);
+	if (defined $type) {
+		my $srcfile=srcfile($file);
+		my $content=readfile($srcfile);
+		my $page=pagename($file);
+		will_render($page, htmlpage($page), 1);
 
-sub mtime ($) { #{{{
-	my $page=shift;
-	
-	return (stat($page))[9];
-} #}}}
+		if ($config{discussion}) {
+			# Discussion links are a special case since they're
+			# not in the text of the page, but on its template.
+			$links{$page}=[ $page."/".lc($config{discussionpage}) ];
+		}
+		else {
+			$links{$page}=[];
+		}
 
-sub findlinks ($$) { #{{{
-	my $content=shift;
-	my $page=shift;
+		run_hooks(scan => sub {
+			shift->(
+				page => $page,
+				content => $content,
+			);
+		});
 
-	my @links;
-	while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
-		push @links, lc($1);
+		# Preprocess in scan-only mode.
+		preprocess($page, $page, $content, 1);
+	}
+	else {
+		will_render($file, $file, 1);
+	}
+}
+
+sub fast_file_copy (@) {
+	my $srcfile=shift;
+	my $destfile=shift;
+	my $srcfd=shift;
+	my $destfd=shift;
+	my $cleanup=shift;
+
+	my $blksize = 16384;
+	my ($len, $buf, $written);
+	while ($len = sysread $srcfd, $buf, $blksize) {
+		if (! defined $len) {
+			next if $! =~ /^Interrupted/;
+			error("failed to read $srcfile: $!", $cleanup);
+		}
+		my $offset = 0;
+		while ($len) {
+			defined($written = syswrite $destfd, $buf, $len, $offset)
+				or error("failed to write $destfile: $!", $cleanup);
+			$len -= $written;
+			$offset += $written;
+		}
 	}
-	# Discussion links are a special case since they're not in the text
-	# of the page, but on its template.
-	return @links, "$page/discussion";
-} #}}}
+}
 
-sub render ($) { #{{{
+sub render ($) {
 	my $file=shift;
 	
 	my $type=pagetype($file);
-	my $content=readfile("$config{srcdir}/$file");
-	if ($type ne 'unknown') {
+	my $srcfile=srcfile($file);
+	if (defined $type) {
 		my $page=pagename($file);
+		delete $depends{$page};
+		delete $depends_simple{$page};
+		will_render($page, htmlpage($page), 1);
+		return if $type=~/^_/;
 		
-		$links{$page}=[findlinks($content, $page)];
+		my $content=htmlize($page, $page, $type,
+			linkify($page, $page,
+			preprocess($page, $page,
+			filter($page, $page,
+			readfile($srcfile)))));
 		
-		$content=linkify($content, $page);
-		$content=htmlize($type, $content);
-		
-		check_overwrite("$config{destdir}/".htmlpage($page), $page);
-		writefile("$config{destdir}/".htmlpage($page),
-			genpage($content, $page, mtime("$config{srcdir}/$file")));		
-		$oldpagemtime{$page}=time;
-		$renderedfiles{$page}=htmlpage($page);
-
-		# TODO: should really add this to renderedfiles and call
-		# check_overwrite, as above, but currently renderedfiles
-		# only supports listing one file per page.
-		if ($config{rss}) {
-			writefile("$config{destdir}/".rsspage($page),
-				genrss($content, $page, mtime("$config{srcdir}/$file")));
-		}
+		my $output=htmlpage($page);
+		writefile($output, $config{destdir}, genpage($page, $content));
 	}
 	else {
-		$links{$file}=[];
-		check_overwrite("$config{destdir}/$file", $file);
-		writefile("$config{destdir}/$file", $content);
-		$oldpagemtime{$file}=time;
-		$renderedfiles{$file}=$file;
+		delete $depends{$file};
+		delete $depends_simple{$file};
+		will_render($file, $file, 1);
+		
+		if ($config{hardlink}) {
+			# only hardlink if owned by same user
+			my @stat=stat($srcfile);
+			if ($stat[4] == $>) {
+				prep_writefile($file, $config{destdir});
+				unlink($config{destdir}."/".$file);
+				if (link($srcfile, $config{destdir}."/".$file)) {
+					return;
+				}
+			}
+			# if hardlink fails, fall back to copying
+		}
+		
+		my $srcfd=readfile($srcfile, 1, 1);
+		writefile($file, $config{destdir}, undef, 1, sub {
+			fast_file_copy($srcfile, $file, $srcfd, @_);
+		});
 	}
-} #}}}
+}
 
-sub prune ($) { #{{{
+sub prune ($) {
 	my $file=shift;
 
 	unlink($file);
@@ -256,108 +256,264 @@ sub prune ($) { #{{{
 	while (rmdir($dir)) {
 		$dir=dirname($dir);
 	}
-} #}}}
+}
+
+sub srcdir_check () {
+	# security check, avoid following symlinks in the srcdir path by default
+	my $test=$config{srcdir};
+	while (length $test) {
+		if (-l $test && ! $config{allow_symlinks_before_srcdir}) {
+			error(sprintf(gettext("symlink found in srcdir path (%s) -- set allow_symlinks_before_srcdir to allow this"), $test));
+		}
+		unless ($test=~s/\/+$//) {
+			$test=dirname($test);
+		}
+	}
+	
+}
 
-sub refresh () { #{{{
-	# find existing pages
-	my %exists;
-	my @files;
+sub find_src_files () {
+	my (@files, %pages);
 	eval q{use File::Find};
+	error($@) if $@;
 	find({
 		no_chdir => 1,
 		wanted => sub {
-			if (/$config{wiki_file_prune_regexp}/) {
-				no warnings 'once';
+			my $file=decode_utf8($_);
+			$file=~s/^\Q$config{srcdir}\E\/?//;
+			my $page = pagename($file);
+			if (! exists $pagesources{$page} &&
+			    file_pruned($file)) {
 				$File::Find::prune=1;
-				use warnings "all";
+				return;
 			}
-			elsif (! -d $_ && ! -l $_) {
-				my ($f)=/$config{wiki_file_regexp}/; # untaint
-				if (! defined $f) {
-					warn("skipping bad filename $_\n");
-				}
-				else {
-					$f=~s/^\Q$config{srcdir}\E\/?//;
-					push @files, $f;
-					$exists{pagename($f)}=1;
+			return if -l $_ || -d _ || ! length $file;
+
+			my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
+			if (! defined $f) {
+				warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
+			}
+			else {
+				push @files, $f;
+				if ($pages{$page}) {
+					debug(sprintf(gettext("%s has multiple possible source pages"), $page));
 				}
+				$pages{$page}=1;
 			}
 		},
 	}, $config{srcdir});
+	foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
+		find({
+			no_chdir => 1,
+			wanted => sub {
+				my $file=decode_utf8($_);
+				$file=~s/^\Q$dir\E\/?//;
+				my $page=pagename($file);
+				if (! exists $pagesources{$page} &&
+				    file_pruned($file)) {
+					$File::Find::prune=1;
+					return;
+				}
+				return if -l $_ || -d _ || ! length $file;
 
-	my %rendered;
+				my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
+				if (! defined $f) {
+					warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
+				}
+				else {
+					# avoid underlaydir override
+					# attacks; see security.mdwn
+					if (! -l "$config{srcdir}/$f" && 
+					    ! -e _) {
+						if (! $pages{$page}) {
+							push @files, $f;
+							$pages{$page}=1;
+						}
+					}
+				}
+			},
+		}, $dir);
+	};
+
+	# Returns a list of all source files found, and a hash of 
+	# the corresponding page names.
+	return \@files, \%pages;
+}
 
+sub refresh () {
+	srcdir_check();
+	run_hooks(refresh => sub { shift->() });
+	my ($files, $exists)=find_src_files();
+
+	my (%rendered, @add, @del, @internal);
 	# check for added or removed pages
-	my @add;
-	foreach my $file (@files) {
+	foreach my $file (@$files) {
 		my $page=pagename($file);
-		if (! $oldpagemtime{$page}) {
-			debug("new page $page");
-			push @add, $file;
-			$links{$page}=[];
-			$pagesources{$page}=$file;
+		if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
+			# the page has changed its type
+			$forcerebuild{$page}=1;
+		}
+		$pagesources{$page}=$file;
+		if (! $pagemtime{$page}) {
+			if (isinternal($page)) {
+				push @internal, $file;
+			}
+			else {
+				push @add, $file;
+				if ($config{getctime} && -e "$config{srcdir}/$file") {
+					eval {
+						my $time=rcs_getctime("$config{srcdir}/$file");
+						$pagectime{$page}=$time;
+					};
+					if ($@) {
+						print STDERR $@;
+					}
+				}
+			}
+			$pagecase{lc $page}=$page;
+			if (! exists $pagectime{$page}) {
+				$pagectime{$page}=(srcfile_stat($file))[10];
+			}
 		}
 	}
-	my @del;
-	foreach my $page (keys %oldpagemtime) {
-		if (! $exists{$page}) {
-			debug("removing old page $page");
-			push @del, $pagesources{$page};
-			prune($config{destdir}."/".$renderedfiles{$page});
-			delete $renderedfiles{$page};
-			$oldpagemtime{$page}=0;
+	foreach my $page (keys %pagemtime) {
+		if (! $exists->{$page}) {
+			if (isinternal($page)) {
+				push @internal, $pagesources{$page};
+			}
+			else {
+				debug(sprintf(gettext("removing old page %s"), $page));
+				push @del, $pagesources{$page};
+			}
+			$links{$page}=[];
+			$renderedfiles{$page}=[];
+			$pagemtime{$page}=0;
+			foreach my $old (@{$oldrenderedfiles{$page}}) {
+				prune($config{destdir}."/".$old);
+			}
 			delete $pagesources{$page};
+			foreach my $source (keys %destsources) {
+				if ($destsources{$source} eq $page) {
+					delete $destsources{$source};
+				}
+			}
 		}
 	}
-	
-	# render any updated files
-	foreach my $file (@files) {
+
+	# find changed and new files
+	my @needsbuild;
+	foreach my $file (@$files) {
 		my $page=pagename($file);
-		
-		if (! exists $oldpagemtime{$page} ||
-		    mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
-		    	debug("rendering changed file $file");
-			render($file);
-			$rendered{$file}=1;
+		my ($srcfile, @stat)=srcfile_stat($file);
+		if (! exists $pagemtime{$page} ||
+		    $stat[9] > $pagemtime{$page} ||
+	    	    $forcerebuild{$page}) {
+			$pagemtime{$page}=$stat[9];
+			if (isinternal($page)) {
+				push @internal, $file;
+				# Preprocess internal page in scan-only mode.
+				preprocess($page, $page, readfile($srcfile), 1);
+			}
+			else {
+				push @needsbuild, $file;
+			}
+		}
+	}
+	run_hooks(needsbuild => sub { shift->(\@needsbuild) });
+
+	# scan and render files
+	foreach my $file (@needsbuild) {
+		debug(sprintf(gettext("scanning %s"), $file));
+		scan($file);
+	}
+	calculate_links();
+	foreach my $file (@needsbuild) {
+		debug(sprintf(gettext("building %s"), $file));
+		render($file);
+		$rendered{$file}=1;
+	}
+	foreach my $file (@internal) {
+		# internal pages are not rendered
+		my $page=pagename($file);
+		delete $depends{$page};
+		delete $depends_simple{$page};
+		foreach my $old (@{$renderedfiles{$page}}) {
+			delete $destsources{$old};
 		}
+		$renderedfiles{$page}=[];
 	}
 	
-	# 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
+	# rebuild pages that link to added or removed pages
 	if (@add || @del) {
-FILE:		foreach my $file (@files) {
-			my $page=pagename($file);
-			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;
-					}
-				}
+		foreach my $f (@add, @del) {
+			my $p=pagename($f);
+			foreach my $page (keys %{$backlinks{$p}}) {
+				my $file=$pagesources{$page};
+				next if $rendered{$file};
+		   		debug(sprintf(gettext("building %s, which links to %s"), $file, $p));
+				render($file);
+				$rendered{$file}=1;
 			}
 		}
 	}
 
-	# 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) {
+	if (%rendered || @del || @internal) {
+		my @changed=(keys %rendered, @del);
+
+ 		my %lcchanged = map { lc(pagename($_)) => 1 } @changed;
+ 
+		# rebuild dependant pages
+		foreach my $f (@$files) {
+			next if $rendered{$f};
+			my $p=pagename($f);
+			my $reason = undef;
+
+			if (exists $depends_simple{$p}) {
+				foreach my $d (keys %{$depends_simple{$p}}) {
+					if (exists $lcchanged{$d}) {
+						$reason = $d;
+						last;
+					}
+				}
+			}
+
+			if (exists $depends{$p} && ! defined $reason) {
+				D: foreach my $d (keys %{$depends{$p}}) {
+					my $sub=pagespec_translate($d);
+					next if $@ || ! defined $sub;
+
+					# only consider internal files
+					# if the page explicitly depends
+					# on such files
+					foreach my $file (@changed, $d =~ /internal\(/ ? @internal : ()) {
+						next if $file eq $f;
+						my $page=pagename($file);
+						if ($sub->($page, location => $p)) {
+							$reason = $page;
+							last D;
+						}
+					}
+				}
+			}
+
+			if (defined $reason) {
+				debug(sprintf(gettext("building %s, which depends on %s"), $f, $reason));
+				render($f);
+				$rendered{$f}=1;
+			}
+		}
+		
+		# handle backlinks; if a page has added/removed links,
+		# update the pages it links to
 		my %linkchanged;
-		foreach my $file (keys %rendered, @del) {
+		foreach my $file (@changed) {
 			my $page=pagename($file);
+			
 			if (exists $links{$page}) {
 				foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 					if (length $link &&
-					    ! exists $oldlinks{$page} ||
-					    ! grep { $_ eq $link } @{$oldlinks{$page}}) {
+					    (! exists $oldlinks{$page} ||
+					     ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
 						$linkchanged{$link}=1;
 					}
 				}
@@ -365,21 +521,67 @@ FILE:		foreach my $file (@files) {
 			if (exists $oldlinks{$page}) {
 				foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 					if (length $link &&
-					    ! exists $links{$page} ||
-					    ! grep { $_ eq $link } @{$links{$page}}) {
+					    (! exists $links{$page} || 
+					     ! grep { bestlink($page, $_) 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");
+				next if $rendered{$linkfile};
+				debug(sprintf(gettext("building %s, to update its backlinks"), $linkfile));
 				render($linkfile);
+				$rendered{$linkfile}=1;
 			}
 		}
 	}
-} #}}}
+
+	# remove no longer rendered files
+	foreach my $src (keys %rendered) {
+		my $page=pagename($src);
+		foreach my $file (@{$oldrenderedfiles{$page}}) {
+			if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
+				debug(sprintf(gettext("removing %s, no longer built by %s"), $file, $page));
+				prune($config{destdir}."/".$file);
+			}
+		}
+	}
+
+	if (@del) {
+		run_hooks(delete => sub { shift->(@del) });
+	}
+	if (%rendered) {
+		run_hooks(change => sub { shift->(keys %rendered) });
+	}
+}
+
+sub commandline_render () {
+	lockwiki();
+	loadindex();
+	unlockwiki();
+
+	my $srcfile=possibly_foolish_untaint($config{render});
+	my $file=$srcfile;
+	$file=~s/\Q$config{srcdir}\E\/?//;
+
+	my $type=pagetype($file);
+	die sprintf(gettext("ikiwiki: cannot build %s"), $srcfile)."\n" unless defined $type;
+	my $content=readfile($srcfile);
+	my $page=pagename($file);
+	$pagesources{$page}=$file;
+	$content=filter($page, $page, $content);
+	$content=preprocess($page, $page, $content);
+	$content=linkify($page, $page, $content);
+	$content=htmlize($page, $page, $type, $content);
+	$pagemtime{$page}=(stat($srcfile))[9];
+	$pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};
+
+	print genpage($page, $content);
+	exit 0;
+}
 
 1