some answers

[git.ikiwiki.info.git] / IkiWiki / Render.pm

diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index 92993fd95faf4003961062d9773f7f21d16526a1..a90d202eef0c10fd480b00459c1238f58052b094 100644 (file)
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -5,34 +5,44 @@ package IkiWiki;
 use warnings;
 use strict;
 use IkiWiki;
 use warnings;
 use strict;
 use IkiWiki;

-use Encode;

 
 

-my %backlinks;
-my $backlinks_calculated=0;
+my (%backlinks, %rendered);
+our %brokenlinks;
+my $links_calculated=0;

 
 

-sub calculate_backlinks () { #{{{
-       return if $backlinks_calculated;
-       %backlinks=();
+sub calculate_links () {
+       return if $links_calculated;
+       %backlinks=%brokenlinks=();

        foreach my $page (keys %links) {
                foreach my $link (@{$links{$page}}) {
                        my $bestlink=bestlink($page, $link);
        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;
+                       if (length $bestlink) {
+                               $backlinks{$bestlink}{$page}=1
+                                       if $bestlink ne $page;
+                       }
+                       else {
+                               push @{$brokenlinks{$link}}, $page;

                        }
                }
        }
                        }
                }
        }

-       $backlinks_calculated=1;
-} #}}}
+       $links_calculated=1;
+}

 
 

-sub backlinks ($) { #{{{
+sub backlink_pages ($) {

        my $page=shift;
 
        my $page=shift;
 

-       calculate_backlinks();
+       calculate_links();
+
+       return keys %{$backlinks{$page}};
+}
+
+sub backlinks ($) {
+       my $page=shift;

 
        my @links;
 
        my @links;

-       foreach my $p (keys %{$backlinks{$page}}) {
+       foreach my $p (backlink_pages($page)) {

                my $href=urlto($p, $page);
                my $href=urlto($p, $page);

-                
+

                # Trim common dir prefixes from both pages.
                my $p_trimmed=$p;
                my $page_trimmed=$page;
                # Trim common dir prefixes from both pages.
                my $p_trimmed=$p;
                my $page_trimmed=$page;


@@ -45,61 +55,61 @@ sub backlinks ($) { #{{{
                push @links, { url => $href, page => pagetitle($p_trimmed) };
        }
        return @links;
                push @links, { url => $href, page => pagetitle($p_trimmed) };
        }
        return @links;

-} #}}}
+}

 
 

-sub parentlinks ($) { #{{{
+sub genpage ($$) {

        my $page=shift;
        my $page=shift;

+       my $content=shift;

        
        

-       my @ret;
-       my $pagelink="";
-       my $path="";
-       my $title=$config{wikiname};
-       
-       return if $page eq 'index'; # toplevel
-       foreach my $dir (split("/", $page)) {
-               push @ret, { url => urlto($path, $page), page => $title };
-               $path.="/".$dir;
-               $title=pagetitle($dir);
-       }
-       return @ret;
-} #}}}
+       run_hooks(indexhtml => sub {
+               shift->(page => $page, destpage => $page, content => $content);
+       });

 
 

-sub genpage ($$$) { #{{{
-       my $page=shift;
-       my $content=shift;
-       my $mtime=shift;
+       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;
+       if (defined $templatefile) {
+               $template=template_depends($templatefile, $page,
+                       blind_cache => 1);
+       }
+       else {
+               # no explicit depends as special case
+               $template=template('page.tmpl', 
+                       blind_cache => 1);
+       }

 
 

-       my $template=template("page.tmpl", blind_cache => 1);

        my $actions=0;
        my $actions=0;

-

        if (length $config{cgiurl}) {
        if (length $config{cgiurl}) {

-               $template->param(editurl => cgiurl(do => "edit", page => pagetitle($page, 1)));
-               $template->param(prefsurl => cgiurl(do => "prefs"));
-               if ($config{rcs}) {
-                       $template->param(recentchangesurl => cgiurl(do => "recentchanges"));
+               if (IkiWiki->can("cgi_editpage")) {
+                       $template->param(editurl => cgiurl(do => "edit", page => $page));
+                       $actions++;

                }
                }

-               $actions++;

        }
        }

-
-       if (length $config{historyurl}) {
+       if (defined $config{historyurl} && length $config{historyurl}) {

                my $u=$config{historyurl};
                my $u=$config{historyurl};

-               $u=~s/\[\[file\]\]/$pagesources{$page}/g;
+               my $p=uri_escape_utf8($pagesources{$page}, '^A-Za-z0-9\-\._~/');
+               $u=~s/\[\[file\]\]/$p/g;

                $template->param(historyurl => $u);
                $actions++;
        }
        if ($config{discussion}) {
                $template->param(historyurl => $u);
                $actions++;
        }
        if ($config{discussion}) {

-               my $discussionlink=gettext("discussion");
-               if ($page !~ /.*\/\Q$discussionlink\E$/ &&
+               if ($page !~ /.*\/\Q$config{discussionpage}\E$/i &&

                   (length $config{cgiurl} ||
                   (length $config{cgiurl} ||

-                   exists $links{$page."/".$discussionlink})) {
-                       $template->param(discussionlink => htmllink($page, $page, gettext("Discussion"), noimageinline => 1, forcesubpage => 1));
+                   exists $links{$page."/".$config{discussionpage}})) {
+                       $template->param(discussionlink => htmllink($page, $page, $config{discussionpage}, noimageinline => 1, forcesubpage => 1));

                        $actions++;
                }
        }
                        $actions++;
                }
        }

-

        if ($actions) {
                $template->param(have_actions => 1);
        }
        if ($actions) {
                $template->param(have_actions => 1);
        }

+       templateactions($template, $page);

 
        my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
        my ($backlinks, $more_backlinks);
 
        my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
        my ($backlinks, $more_backlinks);


@@ -117,12 +127,13 @@ sub genpage ($$$) { #{{{
                        ? $config{wikiname} 
                        : pagetitle(basename($page)),
                wikiname => $config{wikiname},
                        ? $config{wikiname} 
                        : pagetitle(basename($page)),
                wikiname => $config{wikiname},

-               parentlinks => [parentlinks($page)],

                content => $content,
                backlinks => $backlinks,
                more_backlinks => $more_backlinks,
                content => $content,
                backlinks => $backlinks,
                more_backlinks => $more_backlinks,

-               mtime => displaytime($mtime),
+               mtime => displaytime($pagemtime{$page}),
+               ctime => displaytime($pagectime{$page}, undef, 1),

                baseurl => baseurl($page),
                baseurl => baseurl($page),

+               html5 => $config{html5},

        );
 
        run_hooks(pagetemplate => sub {
        );
 
        run_hooks(pagetemplate => sub {


@@ -130,7 +141,7 @@ sub genpage ($$$) { #{{{
        });
        
        $content=$template->output;
        });
        
        $content=$template->output;

-
+       

        run_hooks(format => sub {
                $content=shift->(
                        page => $page,
        run_hooks(format => sub {
                $content=shift->(
                        page => $page,


@@ -139,16 +150,12 @@ sub genpage ($$$) { #{{{
        });
 
        return $content;
        });
 
        return $content;

-} #}}}
+}

 
 

-sub mtime ($) { #{{{
+sub scan ($) {

        my $file=shift;
        my $file=shift;

-       
-       return (stat($file))[9];
-} #}}}

 
 

-sub scan ($) { #{{{
-       my $file=shift;
+       debug(sprintf(gettext("scanning %s"), $file));

 
        my $type=pagetype($file);
        if (defined $type) {
 
        my $type=pagetype($file);
        if (defined $type) {


@@ -157,290 +164,693 @@ sub scan ($) { #{{{
                my $page=pagename($file);
                will_render($page, htmlpage($page), 1);
 
                my $page=pagename($file);
                will_render($page, htmlpage($page), 1);
 

-               # Always needs to be done, since filters might add links
-               # to the content.
-               $content=filter($page, $content);
-
-               my @links;
-               while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
-                       push @links, linkpage($2);
-               }

                if ($config{discussion}) {
                        # Discussion links are a special case since they're
                        # not in the text of the page, but on its template.
                if ($config{discussion}) {
                        # Discussion links are a special case since they're
                        # not in the text of the page, but on its template.

-                       push @links, $page."/".gettext("discussion");
+                       $links{$page}=[ $page."/".lc($config{discussionpage}) ];

                }
                }

-               $links{$page}=\@links;
-               
+               else {
+                       $links{$page}=[];
+               }
+               delete $typedlinks{$page};
+

                # Preprocess in scan-only mode.
                preprocess($page, $page, $content, 1);
                # Preprocess in scan-only mode.
                preprocess($page, $page, $content, 1);

+
+               run_hooks(scan => sub {
+                       shift->(
+                               page => $page,
+                               content => $content,
+                       );
+               });

        }
        else {
                will_render($file, $file, 1);
        }
        }
        else {
                will_render($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;
+               }
+       }
+}

 
 

-sub render ($) { #{{{
+sub render ($$) {

        my $file=shift;
        my $file=shift;

+       return if $rendered{$file};
+       debug(shift);
+       $rendered{$file}=1;

        
        my $type=pagetype($file);
        my $srcfile=srcfile($file);
        if (defined $type) {
        
        my $type=pagetype($file);
        my $srcfile=srcfile($file);
        if (defined $type) {

-               my $content=readfile($srcfile);

                my $page=pagename($file);
                delete $depends{$page};
                my $page=pagename($file);
                delete $depends{$page};

+               delete $depends_simple{$page};

                will_render($page, htmlpage($page), 1);
                will_render($page, htmlpage($page), 1);

+               return if $type=~/^_/;

                
                

-               $content=filter($page, $content);
-               $content=preprocess($page, $page, $content);
-               $content=linkify($page, $page, $content);
-               $content=htmlize($page, $type, $content);
+               my $content=htmlize($page, $page, $type,
+                       linkify($page, $page,
+                       preprocess($page, $page,
+                       filter($page, $page,
+                       readfile($srcfile)))));

                
                

-               writefile(htmlpage($page), $config{destdir},
-                       genpage($page, $content, mtime($srcfile)));
+               my $output=htmlpage($page);
+               writefile($output, $config{destdir}, genpage($page, $content));

        }
        else {
        }
        else {

-               my $srcfd=readfile($srcfile, 1, 1);

                delete $depends{$file};
                delete $depends{$file};

+               delete $depends_simple{$file};

                will_render($file, $file, 1);
                will_render($file, $file, 1);

-               writefile($file, $config{destdir}, undef, 1, sub {
-                       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 $file: $!", $cleanup);
-                                       $len -= $written;
-                                       $offset += $written;
+               
+               if ($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;
        my $file=shift;

+       my $up_to=shift;

 
        unlink($file);
        my $dir=dirname($file);
 
        unlink($file);
        my $dir=dirname($file);

-       while (rmdir($dir)) {
+       while ((! defined $up_to || $dir =~ m{^\Q$up_to\E\/}) && rmdir($dir)) {

                $dir=dirname($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;
+sub find_src_files () {

        my @files;
        my @files;

+       my %pages;

        eval q{use File::Find};
        error($@) if $@;
        eval q{use File::Find};
        error($@) if $@;

-       find({
-               no_chdir => 1,
-               wanted => sub {
-                       $_=decode_utf8($_);
-                       if (file_pruned($_, $config{srcdir})) {
-                               $File::Find::prune=1;
-                       }
-                       elsif (! -d $_ && ! -l $_) {
-                               my ($f)=/$config{wiki_file_regexp}/; # untaint
-                               if (! defined $f) {
-                                       warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
-                               }
-                               else {
-                                       $f=~s/^\Q$config{srcdir}\E\/?//;
+
+       eval q{use Cwd};
+       die $@ if $@;
+       my $origdir=getcwd();
+       my $abssrcdir=Cwd::abs_path($config{srcdir});
+
+       my ($page, $underlay);
+       my $helper=sub {
+               my $file=decode_utf8($_);
+
+               return if -l $file || -d _;
+               $file=~s/^\.\///;
+               return if ! length $file;
+               $page = pagename($file);
+               if (! exists $pagesources{$page} &&
+                   file_pruned($file)) {
+                       $File::Find::prune=1;
+                       return;
+               }
+
+               my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
+               if (! defined $f) {
+                       warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
+                       return;
+               }
+       
+               if ($underlay) {
+                       # avoid underlaydir override attacks; see security.mdwn
+                       if (! -l "$abssrcdir/$f" && ! -e _) {
+                               if (! $pages{$page}) {

                                        push @files, $f;
                                        push @files, $f;

-                                       $exists{pagename($f)}=1;
+                                       $pages{$page}=1;

                                }
                        }
                                }
                        }

-               },
-       }, $config{srcdir});
+               }
+               else {
+                       push @files, $f;
+                       if ($pages{$page}) {
+                               debug(sprintf(gettext("%s has multiple possible source pages"), $page));
+                       }
+                       $pages{$page}=1;
+               }
+       };
+
+       chdir($config{srcdir}) || die "chdir $config{srcdir}: $!";

        find({
                no_chdir => 1,
        find({
                no_chdir => 1,

-               wanted => sub {
-                       $_=decode_utf8($_);
-                       if (file_pruned($_, $config{underlaydir})) {
-                               $File::Find::prune=1;
+               wanted => $helper,
+       }, '.');
+       chdir($origdir) || die "chdir $origdir: $!";
+
+       $underlay=1;
+       foreach (@{$config{underlaydirs}}, $config{underlaydir}) {
+               if (chdir($_)) {
+                       find({
+                               no_chdir => 1,
+                               wanted => $helper,
+                       }, '.');
+                       chdir($origdir) || die "chdir: $!";
+               }
+       };
+
+       return \@files, \%pages;
+}
+
+sub find_new_files ($) {
+       my $files=shift;
+       my @new;
+       my @internal_new;
+
+       my $times_noted;
+
+       foreach my $file (@$files) {
+               my $page=pagename($file);
+
+               if ($config{rcs} && $config{gettime} &&
+                   -e "$config{srcdir}/$file") {
+                       if (! $times_noted) {
+                               debug(sprintf(gettext("querying %s for file creation and modification times.."), $config{rcs}));
+                               $times_noted=1;

                        }
                        }

-                       elsif (! -d $_ && ! -l $_) {
-                               my ($f)=/$config{wiki_file_regexp}/; # untaint
-                               if (! defined $f) {
-                                       warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
-                               }
-                               else {
-                                       # Don't add pages that are in the
-                                       # srcdir.
-                                       $f=~s/^\Q$config{underlaydir}\E\/?//;
-                                       if (! -e "$config{srcdir}/$f" && 
-                                           ! -l "$config{srcdir}/$f") {
-                                               my $page=pagename($f);
-                                               if (! $exists{$page}) {
-                                                       push @files, $f;
-                                                       $exists{$page}=1;
-                                               }
-                                       }
+
+                       eval {
+                               my $ctime=rcs_getctime($file);
+                               if ($ctime > 0) {
+                                       $pagectime{$page}=$ctime;

                                }
                                }

+                       };
+                       if ($@) {
+                               print STDERR $@;

                        }
                        }

-               },
-       }, $config{underlaydir});
-
-       my %rendered;
+                       my $mtime;
+                       eval {
+                               $mtime=rcs_getmtime($file);
+                       };
+                       if ($@) {
+                               print STDERR $@;
+                       }
+                       elsif ($mtime > 0) {
+                               utime($mtime, $mtime, "$config{srcdir}/$file");
+                       }
+               }

 
 

-       # check for added or removed pages
-       my @add;
-       foreach my $file (@files) {
-               my $page=pagename($file);
+               if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
+                       # the page has changed its type
+                       $forcerebuild{$page}=1;
+               }

                $pagesources{$page}=$file;
                if (! $pagemtime{$page}) {
                $pagesources{$page}=$file;
                if (! $pagemtime{$page}) {

-                       push @add, $file;
-                       $pagecase{lc $page}=$page;
-                       if ($config{getctime} && -e "$config{srcdir}/$file") {
-                               $pagectime{$page}=rcs_getctime("$config{srcdir}/$file");
+                       if (isinternal($page)) {
+                               push @internal_new, $file;

                        }
                        }

-                       elsif (! exists $pagectime{$page}) {
-                               $pagectime{$page}=mtime(srcfile($file));
+                       else {
+                               push @new, $file;
+                       }
+                       $pagecase{lc $page}=$page;
+                       if (! exists $pagectime{$page}) {
+                               $pagectime{$page}=(srcfile_stat($file))[10];

                        }
                }
        }
                        }
                }
        }

+
+       return \@new, \@internal_new;
+}
+
+sub find_del_files ($) {
+       my $pages=shift;

        my @del;
        my @del;

-       foreach my $page (keys %pagemtime) {
-               if (! $exists{$page}) {
-                       debug(sprintf(gettext("removing old page %s"), $page));
-                       push @del, $pagesources{$page};
+       my @internal_del;
+
+       foreach my $page (keys %pagesources) {
+               if (! $pages->{$page}) {
+                       if (isinternal($page)) {
+                               push @internal_del, $pagesources{$page};
+                       }
+                       else {
+                               push @del, $pagesources{$page};
+                       }

                        $links{$page}=[];
                        $links{$page}=[];

+                       delete $typedlinks{$page};

                        $renderedfiles{$page}=[];
                        $pagemtime{$page}=0;
                        $renderedfiles{$page}=[];
                        $pagemtime{$page}=0;

-                       prune($config{destdir}."/".$_)
-                               foreach @{$oldrenderedfiles{$page}};
-                       delete $pagesources{$page};

                }
        }
 
                }
        }
 

-       # find changed and new files
-       my @needsbuild;
-       foreach my $file (@files) {
+       return \@del, \@internal_del;
+}
+
+sub remove_del (@) {
+       foreach my $file (@_) {

                my $page=pagename($file);
                my $page=pagename($file);

-               
-               my $mtime=mtime(srcfile($file));
+               if (! isinternal($page)) {
+                       debug(sprintf(gettext("removing obsolete %s"), $page));
+               }
+       
+               foreach my $old (@{$oldrenderedfiles{$page}}) {
+                       prune($config{destdir}."/".$old, $config{destdir});
+               }
+
+               foreach my $source (keys %destsources) {
+                       if ($destsources{$source} eq $page) {
+                               delete $destsources{$source};
+                       }
+               }
+       
+               delete $pagecase{lc $page};
+               $delpagesources{$page}=$pagesources{$page};
+               delete $pagesources{$page};
+       }
+}
+
+sub find_changed ($) {
+       my $files=shift;
+       my @changed;
+       my @internal_changed;
+       foreach my $file (@$files) {
+               my $page=pagename($file);
+               my ($srcfile, @stat)=srcfile_stat($file);

                if (! exists $pagemtime{$page} ||
                if (! exists $pagemtime{$page} ||

-                   $mtime > $pagemtime{$page} ||
+                   $stat[9] > $pagemtime{$page} ||

                    $forcerebuild{$page}) {
                    $forcerebuild{$page}) {

-                       $pagemtime{$page}=$mtime;
-                       push @needsbuild, $file;
+                       $pagemtime{$page}=$stat[9];
+
+                       if (isinternal($page)) {
+                               my $content = readfile($srcfile);
+
+                               # Preprocess internal page in scan-only mode.
+                               preprocess($page, $page, $content, 1);
+
+                               run_hooks(scan => sub {
+                                       shift->(
+                                               page => $page,
+                                               content => $content,
+                                       );
+                               });
+
+                               push @internal_changed, $file;
+                       }
+                       else {
+                               push @changed, $file;
+                       }

                }
        }
                }
        }

-       run_hooks(needsbuild => sub { shift->(\@needsbuild) });
+       return \@changed, \@internal_changed;
+}

 
 

-       # scan and rendder files
-       foreach my $file (@needsbuild) {
-               debug(sprintf(gettext("scanning %s"), $file));
-               scan($file);
+sub calculate_old_links ($$) {
+       my ($changed, $del)=@_;
+       my %oldlink_targets;
+       foreach my $file (@$changed, @$del) {
+               my $page=pagename($file);
+               if (exists $oldlinks{$page}) {
+                       foreach my $l (@{$oldlinks{$page}}) {
+                               $oldlink_targets{$page}{$l}=bestlink($page, $l);
+                       }
+               }

        }
        }

-       calculate_backlinks();
-       foreach my $file (@needsbuild) {
-               debug(sprintf(gettext("rendering %s"), $file));
-               render($file);
-               $rendered{$file}=1;
+       return \%oldlink_targets;
+}
+
+sub derender_internal ($) {
+       my $file=shift;
+       my $page=pagename($file);
+       delete $depends{$page};
+       delete $depends_simple{$page};
+       foreach my $old (@{$renderedfiles{$page}}) {
+               delete $destsources{$old};

        }
        }

-       
-       # rebuild pages that link to added or removed pages
-       if (@add || @del) {
-               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;
+       $renderedfiles{$page}=[];
+}
+
+sub render_linkers ($) {
+       my $f=shift;
+       my $p=pagename($f);
+       foreach my $page (keys %{$backlinks{$p}}) {
+               my $file=$pagesources{$page};
+               render($file, sprintf(gettext("building %s, which links to %s"), $file, $p));
+       }
+}
+
+sub remove_unrendered () {
+       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, $config{destdir});

                        }
                }
        }
                        }
                }
        }

+}

 
 

-       if (%rendered || @del) {
-               # rebuild dependant pages
-               foreach my $f (@files) {
-                       next if $rendered{$f};
-                       my $p=pagename($f);
-                       if (exists $depends{$p}) {
-                               foreach my $file (keys %rendered, @del) {
-                                       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;
-                                       }
+sub link_types_changed ($$) {
+       # each is of the form { type => { link => 1 } }
+       my $new = shift;
+       my $old = shift;
+
+       return 0 if !defined $new && !defined $old;
+       return 1 if (!defined $new && %$old) || (!defined $old && %$new);
+
+       while (my ($type, $links) = each %$new) {
+               foreach my $link (keys %$links) {
+                       return 1 unless exists $old->{$type}{$link};
+               }
+       }
+
+       while (my ($type, $links) = each %$old) {
+               foreach my $link (keys %$links) {
+                       return 1 unless exists $new->{$type}{$link};
+               }
+       }
+
+       return 0;
+}
+
+sub calculate_changed_links ($$$) {
+       my ($changed, $del, $oldlink_targets)=@_;
+
+       my (%backlinkchanged, %linkchangers);
+
+       foreach my $file (@$changed, @$del) {
+               my $page=pagename($file);
+
+               if (exists $links{$page}) {
+                       foreach my $l (@{$links{$page}}) {
+                               my $target=bestlink($page, $l);
+                               if (! exists $oldlink_targets->{$page}{$l} ||
+                                   $target ne $oldlink_targets->{$page}{$l}) {
+                                       $backlinkchanged{$target}=1;
+                                       $linkchangers{lc($page)}=1;

                                }
                                }

+                               delete $oldlink_targets->{$page}{$l};

                        }
                }
                        }
                }

-               
-               # handle backlinks; if a page has added/removed links,
-               # update the pages it links to
-               my %linkchanged;
-               foreach my $file (keys %rendered, @del) {
-                       my $page=pagename($file);
-                       
-                       if (exists $links{$page}) {
-                               foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
-                                       if (length $link &&
-                                           (! exists $oldlinks{$page} ||
-                                            ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
-                                               $linkchanged{$link}=1;
-                                       }
+               if (exists $oldlink_targets->{$page} &&
+                   %{$oldlink_targets->{$page}}) {
+                       foreach my $target (values %{$oldlink_targets->{$page}}) {
+                               $backlinkchanged{$target}=1;
+                       }
+                       $linkchangers{lc($page)}=1;
+               }
+
+               # we currently assume that changing the type of a link doesn't
+               # change backlinks
+               if (!exists $linkchangers{lc($page)}) {
+                       if (link_types_changed($typedlinks{$page}, $oldtypedlinks{$page})) {
+                               $linkchangers{lc($page)}=1;
+                       }
+               }
+       }
+
+       return \%backlinkchanged, \%linkchangers;
+}
+
+sub render_dependent ($$$$$$$) {
+       my ($files, $new, $internal_new, $del, $internal_del,
+               $internal_changed, $linkchangers)=@_;
+
+       my @changed=(keys %rendered, @$del);
+       my @exists_changed=(@$new, @$del);
+       
+       my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
+       my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;
+
+       foreach my $p ("templates/page.tmpl", keys %{$depends_simple{""}}) {
+               if ($rendered{$p} || grep { $_ eq $p } @$del) {
+                       foreach my $f (@$files) {
+                               next if $rendered{$f};
+                               render($f, sprintf(gettext("building %s, which depends on %s"), $f, $p));
+                       }
+                       return 0;
+               }
+       }
+        
+       foreach my $f (@$files) {
+               next if $rendered{$f};
+               my $p=pagename($f);
+               my $reason = undef;
+
+               if (exists $depends_simple{$p} && ! defined $reason) {
+                       foreach my $d (keys %{$depends_simple{$p}}) {
+                               if (($depends_simple{$p}{$d} & $IkiWiki::DEPEND_CONTENT &&
+                                    $lc_changed{$d})
+                                   ||
+                                   ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_PRESENCE &&
+                                    $lc_exists_changed{$d})
+                                   ||
+                                   ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_LINKS &&
+                                    $linkchangers->{$d})
+                               ) {
+                                       $reason = $d;
+                                       last;

                                }
                        }
                                }
                        }

-                       if (exists $oldlinks{$page}) {
-                               foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
-                                       if (length $link &&
-                                           (! exists $links{$page} || 
-                                            ! grep { bestlink($page, $_) eq $link } @{$links{$page}})) {
-                                               $linkchanged{$link}=1;
+               }
+       
+               if (exists $depends{$p} && ! defined $reason) {
+                       foreach my $dep (keys %{$depends{$p}}) {
+                               my $sub=pagespec_translate($dep);
+                               next unless defined $sub;
+
+                               # only consider internal files
+                               # if the page explicitly depends
+                               # on such files
+                               my $internal_dep=$dep =~ /(?:internal|comment|comment_pending)\(/;
+
+                               my $in=sub {
+                                       my $list=shift;
+                                       my $type=shift;
+                                       foreach my $file (@$list) {
+                                               next if $file eq $f;
+                                               my $page=pagename($file);
+                                               if ($sub->($page, location => $p)) {
+                                                       if ($type == $IkiWiki::DEPEND_LINKS) {
+                                                               next unless $linkchangers->{lc($page)};
+                                                       }
+                                                       $reason=$page;
+                                                       return 1;
+                                               }

                                        }
                                        }

+                                       return undef;
+                               };
+
+                               if ($depends{$p}{$dep} & $IkiWiki::DEPEND_CONTENT) {
+                                       last if $in->(\@changed, $IkiWiki::DEPEND_CONTENT);
+                                       last if $internal_dep && (
+                                               $in->($internal_new, $IkiWiki::DEPEND_CONTENT) ||
+                                               $in->($internal_del, $IkiWiki::DEPEND_CONTENT) ||
+                                               $in->($internal_changed, $IkiWiki::DEPEND_CONTENT)
+                                       );
+                               }
+                               if ($depends{$p}{$dep} & $IkiWiki::DEPEND_PRESENCE) {
+                                       last if $in->(\@exists_changed, $IkiWiki::DEPEND_PRESENCE);
+                                       last if $internal_dep && (
+                                               $in->($internal_new, $IkiWiki::DEPEND_PRESENCE) ||
+                                               $in->($internal_del, $IkiWiki::DEPEND_PRESENCE)
+                                       );
+                               }
+                               if ($depends{$p}{$dep} & $IkiWiki::DEPEND_LINKS) {
+                                       last if $in->(\@changed, $IkiWiki::DEPEND_LINKS);
+                                       last if $internal_dep && (
+                                               $in->($internal_new, $IkiWiki::DEPEND_LINKS) ||
+                                               $in->($internal_del, $IkiWiki::DEPEND_LINKS) ||
+                                               $in->($internal_changed, $IkiWiki::DEPEND_LINKS)
+                                       );

                                }
                        }
                }
                                }
                        }
                }

-               foreach my $link (keys %linkchanged) {
-                       my $linkfile=$pagesources{$link};
-                       if (defined $linkfile) {
-                               next if $rendered{$linkfile};
-                               debug(sprintf(gettext("rendering %s, to update its backlinks"), $linkfile));
-                               render($linkfile);
-                               $rendered{$linkfile}=1;
-                       }
+       
+               if (defined $reason) {
+                       render($f, sprintf(gettext("building %s, which depends on %s"), $f, $reason));
+                       return 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}."/".$file);
-                       }
+       return 0;
+}
+
+sub render_backlinks ($) {
+       my $backlinkchanged=shift;
+       foreach my $link (keys %$backlinkchanged) {
+               my $linkfile=$pagesources{$link};
+               if (defined $linkfile) {
+                       render($linkfile, sprintf(gettext("building %s, to update its backlinks"), $linkfile));

                }
        }
                }
        }

+}
+
+sub gen_autofile ($$$) {
+       my $autofile=shift;
+       my $pages=shift;
+       my $del=shift;
+
+       if (file_pruned($autofile)) {
+               return;
+       }
+
+       my ($file)="$config{srcdir}/$autofile" =~ /$config{wiki_file_regexp}/; # untaint
+       if (! defined $file) {
+               return;
+       }
+
+       # Remember autofiles that were tried, and never try them again later.
+       if (exists $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}) {
+               return;
+       }
+       $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}=1;
+
+       if (srcfile($autofile, 1) || file_pruned($autofile)) {
+               return;
+       }
+       
+       if (-l $file || -d _ || -e _) {
+               return;
+       }
+
+       my $page = pagename($file);
+       if ($pages->{$page}) {
+               return;
+       }

 
 

-       if (@del) {
-               run_hooks(delete => sub { shift->(@del) });
+       if (grep { $_ eq $autofile } @$del) {
+               return;
+       }
+
+       $autofiles{$autofile}{generator}->();
+       $pages->{$page}=1;
+       return 1;
+}
+
+
+sub refresh () {
+       srcdir_check();
+       run_hooks(refresh => sub { shift->() });
+       my ($files, $pages)=find_src_files();
+       my ($new, $internal_new)=find_new_files($files);
+       my ($del, $internal_del)=find_del_files($pages);
+       my ($changed, $internal_changed)=find_changed($files);
+       run_hooks(needsbuild => sub {
+               my $ret=shift->($changed, [@$del, @$internal_del]);
+               $changed=$ret if ref $ret eq 'ARRAY';
+       });
+       my $oldlink_targets=calculate_old_links($changed, $del);
+
+       foreach my $file (@$changed) {
+               scan($file);
+       }
+
+       foreach my $autofile (keys %autofiles) {
+               if (gen_autofile($autofile, $pages, $del)) {
+                       push @{$files}, $autofile;
+                       push @{$new}, $autofile if find_new_files([$autofile]);
+                       push @{$changed}, $autofile if find_changed([$autofile]);
+                       
+                       scan($autofile);
+               }
+       }
+
+       calculate_links();
+       
+       remove_del(@$del, @$internal_del);
+
+       foreach my $file (@$changed) {
+               render($file, sprintf(gettext("building %s"), $file));
+       }
+       foreach my $file (@$internal_new, @$internal_del, @$internal_changed) {
+               derender_internal($file);
+       }
+
+       run_hooks(build_affected => sub {
+               my %affected = shift->();
+               while (my ($page, $message) = each %affected) {
+                       next unless exists $pagesources{$page};
+                       render($pagesources{$page}, $message);
+               }
+       });
+
+       my ($backlinkchanged, $linkchangers)=calculate_changed_links($changed,
+               $del, $oldlink_targets);
+
+       foreach my $file (@$new, @$del) {
+               render_linkers($file);
+       }
+
+       if (@$changed || @$internal_changed ||
+           @$del || @$internal_del || @$internal_new) {
+               1 while render_dependent($files, $new, $internal_new,
+                       $del, $internal_del, $internal_changed,
+                       $linkchangers);
+       }
+
+       render_backlinks($backlinkchanged);
+       remove_unrendered();
+
+       if (@$del || @$internal_del) {
+               run_hooks(delete => sub { shift->(@$del, @$internal_del) });

        }
        if (%rendered) {
        }
        if (%rendered) {

-               run_hooks(change => sub { shift->(keys %rendered) });
+               run_hooks(rendered => sub { shift->(keys %rendered) });
+               run_hooks(change => sub { shift->(keys %rendered) }); # back-compat
+       }
+       my %all_changed = map { $_ => 1 }
+               @$new, @$changed, @$del,
+               @$internal_new, @$internal_changed, @$internal_del;
+       run_hooks(changes => sub { shift->(keys %all_changed) });
+}
+
+sub clean_rendered {
+       lockwiki();
+       loadindex();
+       remove_unrendered();
+       foreach my $page (keys %oldrenderedfiles) {
+               foreach my $file (@{$oldrenderedfiles{$page}}) {
+                       prune($config{destdir}."/".$file, $config{destdir});
+               }

        }
        }

-} #}}}
+}

 
 

-sub commandline_render () { #{{{
-       loadplugins();
-       checkconfig();
+sub commandline_render () {

        lockwiki();
        loadindex();
        unlockwiki();
        lockwiki();
        loadindex();
        unlockwiki();


@@ -450,17 +860,19 @@ sub commandline_render () { #{{{
        $file=~s/\Q$config{srcdir}\E\/?//;
 
        my $type=pagetype($file);
        $file=~s/\Q$config{srcdir}\E\/?//;
 
        my $type=pagetype($file);

-       die sprintf(gettext("ikiwiki: cannot render %s"), $srcfile)."\n" unless defined $type;
+       die sprintf(gettext("ikiwiki: cannot build %s"), $srcfile)."\n" unless defined $type;

        my $content=readfile($srcfile);
        my $page=pagename($file);
        $pagesources{$page}=$file;
        my $content=readfile($srcfile);
        my $page=pagename($file);
        $pagesources{$page}=$file;

-       $content=filter($page, $content);
+       $content=filter($page, $page, $content);

        $content=preprocess($page, $page, $content);
        $content=linkify($page, $page, $content);
        $content=preprocess($page, $page, $content);
        $content=linkify($page, $page, $content);

-       $content=htmlize($page, $type, $content);
+       $content=htmlize($page, $page, $type, $content);
+       $pagemtime{$page}=(stat($srcfile))[9];
+       $pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};

 
 

-       print genpage($page, $content, mtime($srcfile));
+       print genpage($page, $content);

        exit 0;
        exit 0;

-} #}}}
+}

 
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