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[git.ikiwiki.info.git] / IkiWiki / Render.pm
diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index a981dcb24979da75d8f83923b9d629230a3dc1a2..adae9f0d5898dee39190a29328fa7e221c82dcdc 100644 (file)
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -1,366 +1,241 @@
+#!/usr/bin/perl
+
 package IkiWiki;
 
 use warnings;
 use strict;
 package IkiWiki;
 
 use warnings;
 use strict;
-use File::Spec;
-
-sub linkify ($$) { #{{{
-       my $content=shift;
-       my $page=shift;
-
-       $content =~ s{(\\?)$config{wiki_link_regexp}}{
-               $1 ? "[[$2]]" : htmllink($page, $2)
-       }eg;
-       
-       return $content;
-} #}}}
-
-sub htmlize ($$) { #{{{
-       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 $type not supported");
-       }
-} #}}}
-
-sub backlinks ($) { #{{{
-       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 };
+use IkiWiki;
+use Encode;
+
+my %backlinks;
+my $backlinks_calculated=0;
+
+sub calculate_backlinks () {
+       return if $backlinks_calculated;
+       %backlinks=();
+       foreach my $page (keys %links) {
+               foreach my $link (@{$links{$page}}) {
+                       my $bestlink=bestlink($page, $link);
+                       if (length $bestlink && $bestlink ne $page) {
+                               $backlinks{$bestlink}{$page}=1;
+                       }
                }
        }
                }
        }
+       $backlinks_calculated=1;
+}
 
 
-       return sort { $a->{page} cmp $b->{page} } @links;
-} #}}}
-
-sub parentlinks ($) { #{{{
+sub backlinks ($) {
        my $page=shift;
        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;
+       calculate_backlinks();
 
 
-       return $page.".rss";
-} #}}}
+       my @links;
+       foreach my $p (keys %{$backlinks{$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;
+}
 
 
-sub postprocess { #{{{
-       # Takes content to postprocess followed by a list of postprocessor
-       # commands and subroutine references to run for the commands.
+sub genpage ($$) {
        my $page=shift;
        my $content=shift;
        my $page=shift;
        my $content=shift;
-       my %commands=@_;
-       
-       my $handle=sub {
-               my $escape=shift;
-               my $command=shift;
-               my $params=shift;
-               if (length $escape) {
-                       "[[$command $params]]";
-               }
-               elsif (exists $commands{$command}) {
-                       my %params;
-                       while ($params =~ /(\w+)=\"([^"]+)"(\s+|$)/g) {
-                               $params{$1}=$2;
-                       }
-                       $commands{$command}->($page, %params);
-               }
-               else {
-                       "[[bad directive $command]]";
-               }
-       };
-       
-       $content =~ s{(\\?)$config{wiki_processor_regexp}}{$handle->($1, $2, $3)}eg;
-       return $content;
-} #}}}
 
 
-sub blog_list ($$) { #{{{
-       my $globlist=shift;
-       my $maxitems=shift;
-       
-       my @list;
-       foreach my $page (keys %pagesources) {
-               if (globlist_match($page, $globlist)) {
-                       push @list, $page;
+       my $templatefile;
+       run_hooks(templatefile => sub {
+               return if defined $templatefile;
+               my $file=shift->(page => $page);
+               if (defined $file && defined template_file($file)) {
+                       $templatefile=$file;
                }
                }
-       }
-
-       @list=sort { $pagectime{$b} <=> $pagectime{$a} } @list;
-       return @list if ! $maxitems || @list <= $maxitems;
-       return @list[0..$maxitems - 1];
-} #}}}
-
-sub get_inline_content ($$) { #{{{
-       my $parentpage=shift;
-       my $page=shift;
-       
-       my $file=$pagesources{$page};
-       my $type=pagetype($file);
-       if ($type ne 'unknown') {
-               return htmlize($type, linkify(readfile("$config{srcdir}/$file"), $parentpage));
-       }
-       else {
-               return "";
-       }
-} #}}}
+       });
+       my $template=template(defined $templatefile ? $templatefile : 'page.tmpl', blind_cache => 1);
+       my $actions=0;
 
 
-sub postprocess_html_inline { #{{{
-       my $parentpage=shift;
-       my %params=@_;
-       
-       if (! exists $params{pages}) {
-               return "";
-       }
-       if (! exists $params{archive}) {
-               $params{archive}="no";
-       }
-       if (! exists $params{show} && $params{archive} eq "no") {
-               $params{show}=10;
-       }
-       $inlinepages{$parentpage}=$params{pages};
-       
-       my $template=HTML::Template->new(blind_cache => 1,
-               filename => (($params{archive} eq "no") 
-                               ? "$config{templatedir}/inlinepage.tmpl"
-                               : "$config{templatedir}/inlinepagetitle.tmpl"));
-       
-       my $ret="";
-       foreach my $page (blog_list($params{pages}, $params{show})) {
-               next if $page eq $parentpage;
-               $template->param(pagelink => htmllink($parentpage, $page));
-               $template->param(content => get_inline_content($parentpage, $page))
-                       if $params{archive} eq "no";
-               $template->param(ctime => scalar(gmtime($pagectime{$page})));
-               $ret.=$template->output;
-       }
-       
-       return $ret;
-} #}}}
-
-sub genpage ($$$) { #{{{
-       my $content=shift;
-       my $page=shift;
-       my $mtime=shift;
-
-       $content = postprocess($page, $content, inline => \&postprocess_html_inline);
-       
-       my $title=pagetitle(basename($page));
-       
-       my $template=HTML::Template->new(blind_cache => 1,
-               filename => "$config{templatedir}/page.tmpl");
-       
        if (length $config{cgiurl}) {
        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");
-               }
+               $template->param(editurl => cgiurl(do => "edit", page => $page))
+                       if IkiWiki->can("cgi_editpage");
+               $template->param(prefsurl => cgiurl(do => "prefs"));
+               $actions++;
        }
        }
-
-       if (length $config{historyurl}) {
+               
+       if (defined $config{historyurl} && length $config{historyurl}) {
                my $u=$config{historyurl};
                $u=~s/\[\[file\]\]/$pagesources{$page}/g;
                $template->param(historyurl => $u);
                my $u=$config{historyurl};
                $u=~s/\[\[file\]\]/$pagesources{$page}/g;
                $template->param(historyurl => $u);
+               $actions++;
+       }
+       if ($config{discussion}) {
+               my $discussionlink=gettext("discussion");
+               if ($page !~ /.*\/\Q$discussionlink\E$/ &&
+                  (length $config{cgiurl} ||
+                   exists $links{$page."/".$discussionlink})) {
+                       $template->param(discussionlink => htmllink($page, $page, gettext("Discussion"), noimageinline => 1, forcesubpage => 1));
+                       $actions++;
+               }
        }
 
        }
 
-       if ($config{rss} && $inlinepages{$page}) {
-               $template->param(rssurl => rsspage($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(
        $template->param(
-               title => $title,
+               title => $page eq 'index' 
+                       ? $config{wikiname} 
+                       : pagetitle(basename($page)),
                wikiname => $config{wikiname},
                wikiname => $config{wikiname},
-               parentlinks => [parentlinks($page)],
                content => $content,
                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),
        );
        );
+
+       run_hooks(pagetemplate => sub {
+               shift->(page => $page, destpage => $page, template => $template);
+       });
+       
+       $content=$template->output;
        
        
-       return $template->output;
-} #}}}
+       run_hooks(postscan => sub {
+               shift->(page => $page, content => $content);
+       });
 
 
-sub date_822 ($) { #{{{
-       my $time=shift;
+       run_hooks(format => sub {
+               $content=shift->(
+                       page => $page,
+                       content => $content,
+               );
+       });
 
 
-       eval q{use POSIX};
-       return POSIX::strftime("%a, %d %b %Y %H:%M:%S %z", localtime($time));
-} #}}}
+       return $content;
+}
 
 
-sub absolute_urls ($$) { #{{{
-       # sucky sub because rss sucks
-       my $content=shift;
-       my $url=shift;
+sub scan ($) {
+       my $file=shift;
 
 
-       $url=~s/[^\/]+$//;
-       
-       $content=~s/<a\s+href="(?!http:\/\/)([^"]+)"/<a href="$url$1"/ig;
-       $content=~s/<img\s+src="(?!http:\/\/)([^"]+)"/<img src="$url$1"/ig;
-       return $content;
-} #}}}
+       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 genrss ($$$) { #{{{
-       my $content=shift;
-       my $page=shift;
-       my $mtime=shift;
-       
-       my $url="$config{url}/".htmlpage($page);
-       
-       my $template=HTML::Template->new(blind_cache => 1,
-               filename => "$config{templatedir}/rsspage.tmpl");
-       
-       my @items;
-       my $isblog=0;
-       my $gen_blog=sub {
-               my $parentpage=shift;
-               my %params=@_;
-               
-               return "" if exists $params{archive} && $params{archive} eq 'yes';
-               
-               if (! exists $params{show}) {
-                       $params{show}=10;
-               }
-               if (! exists $params{pages}) {
-                       return "";
+               if ($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."/".gettext("discussion") ];
                }
                }
-               
-               $isblog=1;
-               foreach my $page (blog_list($params{pages}, $params{show})) {
-                       next if $page eq $parentpage;
-                       push @items, {
-                               itemtitle => pagetitle(basename($page)),
-                               itemurl => "$config{url}/$renderedfiles{$page}",
-                               itempubdate => date_822($pagectime{$page}),
-                               itemcontent => absolute_urls(get_inline_content($parentpage, $page), $url),
-                       } if exists $renderedfiles{$page};
+               else {
+                       $links{$page}=[];
                }
                }
-               
-               return "";
-       };
-       
-       $content = postprocess($page, $content, inline => $gen_blog);
 
 
-       $template->param(
-               title => $config{wikiname},
-               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 $src");
-       }
-} #}}}
-
-sub mtime ($) { #{{{
-       my $page=shift;
-       
-       return (stat($page))[9];
-} #}}}
+               run_hooks(scan => sub {
+                       shift->(
+                               page => $page,
+                               content => $content,
+                       );
+               });
 
 
-sub findlinks ($$) { #{{{
-       my $content=shift;
-       my $page=shift;
-
-       my @links;
-       while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
-               push @links, lc($1);
+               # Preprocess in scan-only mode.
+               preprocess($page, $page, $content, 1);
        }
        }
-       # Discussion links are a special case since they're not in the text
-       # of the page, but on its template.
-       return @links, "$page/discussion";
-} #}}}
+       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;
+               }
+       }
+}
 
 
-sub render ($) { #{{{
+sub render ($) {
        my $file=shift;
        
        my $type=pagetype($file);
        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);
                my $page=pagename($file);
+               delete $depends{$page};
+               will_render($page, htmlpage($page), 1);
+               return if $type=~/^_/;
                
                
-               $links{$page}=[findlinks($content, $page)];
-               delete $inlinepages{$page};
-               
-               $content=linkify($content, $page);
-               $content=htmlize($type, $content);
+               my $content=htmlize($page, $page, $type,
+                       linkify($page, $page,
+                       preprocess($page, $page,
+                       filter($page, $page,
+                       readfile($srcfile)))));
                
                
-               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} && exists $inlinepages{$page}) {
-                       writefile("$config{destdir}/".rsspage($page),
-                               genrss($content, $page, mtime("$config{srcdir}/$file")));
-               }
+               my $output=htmlpage($page);
+               writefile($output, $config{destdir}, genpage($page, $content));
        }
        else {
        }
        else {
-               $links{$file}=[];
-               check_overwrite("$config{destdir}/$file", $file);
-               writefile("$config{destdir}/$file", $content);
-               $oldpagemtime{$file}=time;
-               $renderedfiles{$file}=$file;
+               delete $depends{$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);
        my $file=shift;
 
        unlink($file);
@@ -368,120 +243,227 @@ sub prune ($) { #{{{
        while (rmdir($dir)) {
                $dir=dirname($dir);
        }
        while (rmdir($dir)) {
                $dir=dirname($dir);
        }
-} #}}}
+}
+
+sub refresh () {
+       # 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);
+               }
+       }
+       
+       run_hooks(refresh => sub { shift->() });
 
 
-sub refresh () { #{{{
        # find existing pages
        my %exists;
        my @files;
        eval q{use File::Find};
        # find existing pages
        my %exists;
        my @files;
        eval q{use File::Find};
+       error($@) if $@;
        find({
                no_chdir => 1,
                wanted => sub {
        find({
                no_chdir => 1,
                wanted => sub {
-                       if (/$config{wiki_file_prune_regexp}/) {
-                               no warnings 'once';
+                       $_=decode_utf8($_);
+                       if (file_pruned($_, $config{srcdir})) {
                                $File::Find::prune=1;
                                $File::Find::prune=1;
-                               use warnings "all";
                        }
                        }
-                       elsif (! -d $_ && ! -l $_) {
+                       elsif (! -l $_ && ! -d _) {
                                my ($f)=/$config{wiki_file_regexp}/; # untaint
                                if (! defined $f) {
                                my ($f)=/$config{wiki_file_regexp}/; # untaint
                                if (! defined $f) {
-                                       warn("skipping bad filename $_\n");
+                                       warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
                                }
                                else {
                                        $f=~s/^\Q$config{srcdir}\E\/?//;
                                        push @files, $f;
                                }
                                else {
                                        $f=~s/^\Q$config{srcdir}\E\/?//;
                                        push @files, $f;
-                                       $exists{pagename($f)}=1;
+                                       my $pagename = pagename($f);
+                                       if ($exists{$pagename}) {
+                                               debug(sprintf(gettext("%s has multiple possible source pages"), $pagename));
+                                       }
+                                       $exists{$pagename}=1;
                                }
                        }
                },
        }, $config{srcdir});
                                }
                        }
                },
        }, $config{srcdir});
+       foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
+               find({
+                       no_chdir => 1,
+                       wanted => sub {
+                               $_=decode_utf8($_);
+                               if (file_pruned($_, $dir)) {
+                                       $File::Find::prune=1;
+                               }
+                               elsif (! -l $_ && ! -d _) {
+                                       my ($f)=/$config{wiki_file_regexp}/; # untaint
+                                       if (! defined $f) {
+                                               warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
+                                       }
+                                       else {
+                                               $f=~s/^\Q$dir\E\/?//;
+                                               # avoid underlaydir
+                                               # override attacks; see
+                                               # security.mdwn
+                                               if (! -l "$config{srcdir}/$f" && 
+                                                   ! -e _) {
+                                                       my $page=pagename($f);
+                                                       if (! $exists{$page}) {
+                                                               push @files, $f;
+                                                               $exists{$page}=1;
+                                                       }
+                                               }
+                                       }
+                               }
+                       },
+               }, $dir);
+       };
 
 
-       my %rendered;
-
+       my (%rendered, @add, @del, @internal);
        # check for added or removed pages
        # check for added or removed pages
-       my @add;
        foreach my $file (@files) {
                my $page=pagename($file);
        foreach my $file (@files) {
                my $page=pagename($file);
-               if (! $oldpagemtime{$page}) {
-                       debug("new page $page") unless exists $pagectime{$page};
-                       push @add, $file;
-                       $links{$page}=[];
-                       $pagesources{$page}=$file;
-                       $pagectime{$page}=time unless exists $pagectime{$page};
+               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) {
+       foreach my $page (keys %pagemtime) {
                if (! $exists{$page}) {
                if (! $exists{$page}) {
-                       debug("removing old page $page");
-                       push @del, $pagesources{$page};
-                       prune($config{destdir}."/".$renderedfiles{$page});
-                       delete $renderedfiles{$page};
-                       $oldpagemtime{$page}=0;
+                       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;
+                       prune($config{destdir}."/".$_)
+                               foreach @{$oldrenderedfiles{$page}};
                        delete $pagesources{$page};
                        delete $pagesources{$page};
+                       foreach (keys %destsources) {
+                               if ($destsources{$_} eq $page) {
+                                       delete $destsources{$_};
+                               }
+                       }
                }
        }
                }
        }
-       
-       # render any updated files
+
+       # find changed and new files
+       my @needsbuild;
        foreach my $file (@files) {
                my $page=pagename($file);
        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_backlinks();
+       foreach my $file (@needsbuild) {
+               debug(sprintf(gettext("rendering %s"), $file));
+               render($file);
+               $rendered{$file}=1;
+       }
+       foreach my $file (@internal) {
+               # internal pages are not rendered
+               my $page=pagename($file);
+               delete $depends{$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 or inlining 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) {
        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("rendering %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. Also handle inlining here.
-       # 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 || @del) {
-               my %linkchanged;
-               foreach my $file (keys %rendered, @del) {
-                       my $page=pagename($file);
-                       
-                       foreach my $f (@files) {
-                               my $p=pagename($f);
-                               if (exists $inlinepages{$p} && 
-                                   globlist_match($page, $inlinepages{$p})) {
-                                       debug("rendering $f, which inlines $page");
-                                       render($f);
-                                       next;
+       if (%rendered || @del || @internal) {
+               my @changed=(keys %rendered, @del);
+
+               # rebuild dependant pages
+               foreach my $f (@files) {
+                       next if $rendered{$f};
+                       my $p=pagename($f);
+                       if (exists $depends{$p}) {
+                               # only consider internal files
+                               # if the page explicitly depends on such files
+                               foreach my $file (@changed, $depends{$p}=~/internal\(/ ? @internal : ()) {
+                                       next if $f eq $file;
+                                       my $page=pagename($file);
+                                       if (pagespec_match($page, $depends{$p}, location => $p)) {
+                                               debug(sprintf(gettext("rendering %s, which depends on %s"), $f, $page));
+                                               render($f);
+                                               $rendered{$f}=1;
+                                               last;
+                                       }
                                }
                        }
                                }
                        }
+               }
+               
+               # handle backlinks; if a page has added/removed links,
+               # update the pages it links to
+               my %linkchanged;
+               foreach my $file (@changed) {
+                       my $page=pagename($file);
                        
                        if (exists $links{$page}) {
                                foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
                                        if (length $link &&
                        
                        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;
                                        }
                                }
                                                $linkchanged{$link}=1;
                                        }
                                }
@@ -489,21 +471,67 @@ FILE:             foreach my $file (@files) {
                        if (exists $oldlinks{$page}) {
                                foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
                                        if (length $link &&
                        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;
                                        }
                                }
                        }
                }
                                                $linkchanged{$link}=1;
                                        }
                                }
                        }
                }
+
                foreach my $link (keys %linkchanged) {
                        my $linkfile=$pagesources{$link};
                        if (defined $linkfile) {
                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("rendering %s, to update its backlinks"), $linkfile));
                                render($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 rendered 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 render %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
 
 1
Unnamed repository; edit this file 'description' to name the repository.