Export add_autofile() for use in Plugins.

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

diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index 599bb26e2b382a7b139f3fc415db9442a11c195a..d2fa80fbb8fa5f1678627415548fa474ad11d0b0 100644 (file)
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -7,7 +7,7 @@ use strict;
 use IkiWiki;
 use Encode;
 
 use IkiWiki;
 use Encode;
 

-my %backlinks;
+my (%backlinks, %rendered);

 our %brokenlinks;
 my $links_calculated=0;
 
 our %brokenlinks;
 my $links_calculated=0;
 


@@ -58,55 +58,13 @@ sub backlinks ($) {
        return @links;
 }
 
        return @links;
 }
 

-sub find_changed_links (@_) {
-       my %linkchanged;
-       my %linkchangers;
-       foreach my $file (@_) {
-               my $page=pagename($file);
-       
-               if (exists $links{$page}) {
-                       foreach my $l (@{$links{$page}}) {
-                               my $link=bestlink($page, $l);
-                               if (length $link) {
-                                       if (! exists $oldlinks{$page} ||
-                                           ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}}) {
-                                               $linkchanged{$link}=1;
-                                               $linkchangers{lc($page)}=1;
-                                       }
-                               }
-                               else {
-                                       if (! grep { lc $_ eq lc $l } @{$oldlinks{$page}}) {
-                                               $linkchangers{lc($page)}=1
-                                       }
-                               }
-                               
-                       }
-               }
-               if (exists $oldlinks{$page}) {
-                       foreach my $l (@{$oldlinks{$page}}) {
-                               my $link=bestlink($page, $l);
-                               if (length $link) {
-                                       if (! exists $links{$page} || 
-                                           ! grep { bestlink($page, $_) eq $link } @{$links{$page}}) {
-                                               $linkchanged{$link}=1;
-                                               $linkchangers{lc($page)}=1;
-                                       }
-                               }
-                               else {
-                                       if (! grep { lc $_ eq lc $l } @{$links{$page}}) {
-                                               $linkchangers{lc($page)}=1
-                                       }
-                               }
-                       }
-               }
-       }
-
-       return \%linkchanged, \%linkchangers;
-}
-

 sub genpage ($$) {
        my $page=shift;
        my $content=shift;
 sub genpage ($$) {
        my $page=shift;
        my $content=shift;

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

 
        my $templatefile;
        run_hooks(templatefile => sub {
 
        my $templatefile;
        run_hooks(templatefile => sub {


@@ -120,11 +78,14 @@ sub genpage ($$) {
        my $actions=0;
 
        if (length $config{cgiurl}) {
        my $actions=0;
 
        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 (IkiWiki->can("cgi_editpage")) {
+                       $template->param(editurl => cgiurl(do => "edit", page => $page));
+                       $actions++;
+               }
+               if (exists $hooks{auth}) {
+                       $template->param(prefsurl => cgiurl(do => "prefs"));
+                       $actions++;
+               }

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


@@ -134,7 +95,7 @@ sub genpage ($$) {
                $actions++;
        }
        if ($config{discussion}) {
                $actions++;
        }
        if ($config{discussion}) {

-               if ($page !~ /.*\/\Q$config{discussionpage}\E$/ &&
+               if ($page !~ /.*\/\Q$config{discussionpage}\E$/i &&

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


@@ -176,10 +137,6 @@ sub genpage ($$) {
        
        $content=$template->output;
        
        
        $content=$template->output;
        

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

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


@@ -193,6 +150,8 @@ sub genpage ($$) {
 sub scan ($) {
        my $file=shift;
 
 sub scan ($) {
        my $file=shift;
 

+       debug(sprintf(gettext("scanning %s"), $file));
+

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


@@ -248,8 +207,11 @@ sub fast_file_copy (@) {
        }
 }
 
        }
 }
 

-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);
        
        my $type=pagetype($file);
        my $srcfile=srcfile($file);


@@ -318,31 +280,42 @@ sub srcdir_check () {
        
 }
 
        
 }
 

+sub verify_src_file ($$) {
+       my $file=decode_utf8(shift);
+       my $dir=shift;
+
+       return if -l $file || -d $file;
+       $file=~s/^\Q$dir\E\/?//;
+       return if ! length $file;
+       my $page = pagename($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"), $file)."\n");
+       }
+       return ($file,$page,$f);
+}
+

 sub find_src_files () {
 sub find_src_files () {

-       my (@files, %pages);
+       my @files;
+       my %pages;

        eval q{use File::Find};
        error($@) if $@;
        find({
                no_chdir => 1,
                wanted => sub {
        eval q{use File::Find};
        error($@) if $@;
        find({
                no_chdir => 1,
                wanted => sub {

-                       $_=decode_utf8($_);
-                       if (file_pruned($_, $config{srcdir})) {
-                               $File::Find::prune=1;
-                       }
-                       elsif (! -l $_ && ! -d _) {
-                               my ($f)=/$config{wiki_file_regexp}/; # untaint
-                               if (! defined $f) {
-                                       warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
-                               }
-                               else {
-                                       $f=~s/^\Q$config{srcdir}\E\/?//;
-                                       push @files, $f;
-                                       my $pagename = pagename($f);
-                                       if ($pages{$pagename}) {
-                                               debug(sprintf(gettext("%s has multiple possible source pages"), $pagename));
-                                       }
-                                       $pages{$pagename}=1;
+                       my ($file,$page,$f) = verify_src_file($_,$config{srcdir});
+                       if ($file) {
+                               push @files, $file;
+                               if ($pages{$page}) {
+                                       debug(sprintf(gettext("%s has multiple possible source pages"), $page));

                                }
                                }

+                               $pages{$page}=1;

                        }
                },
        }, $config{srcdir});
                        }
                },
        }, $config{srcdir});


@@ -350,46 +323,29 @@ sub find_src_files () {
                find({
                        no_chdir => 1,
                        wanted => sub {
                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 (! $pages{$page}) {
-                                                               push @files, $f;
-                                                               $pages{$page}=1;
-                                                       }
+                               my ($file,$page,$f) = verify_src_file($_,$dir);
+                               if ($f) {
+                                       # avoid underlaydir override
+                                       # attacks; see security.mdwn
+                                       if (! -l "$config{srcdir}/$f" &&
+                                           ! -e _) {
+                                               if (! $pages{$page}) {
+                                                       push @files, $f;
+                                                       $pages{$page}=1;

                                                }
                                        }
                                }
                        },
                }, $dir);
        };
                                                }
                                        }
                                }
                        },
                }, $dir);
        };

-
-       # Returns a list of all source files found, and a hash of 
-       # the corresponding page names.

        return \@files, \%pages;
 }
 
        return \@files, \%pages;
 }
 

-sub refresh () {
-       srcdir_check();
-       run_hooks(refresh => sub { shift->() });
-       my ($files, $exists)=find_src_files();
+sub find_new_files ($) {
+       my $files=shift;
+       my @new;
+       my @internal_new;

 
 

-       my (%rendered, @add, @del, @internal, @internal_change);
-       # check for added or removed pages

        foreach my $file (@$files) {
                my $page=pagename($file);
                if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
        foreach my $file (@$files) {
                my $page=pagename($file);
                if (exists $pagesources{$page} && $pagesources{$page} ne $file) {


@@ -399,10 +355,10 @@ sub refresh () {
                $pagesources{$page}=$file;
                if (! $pagemtime{$page}) {
                        if (isinternal($page)) {
                $pagesources{$page}=$file;
                if (! $pagemtime{$page}) {
                        if (isinternal($page)) {

-                               push @internal, $file;
+                               push @internal_new, $file;

                        }
                        else {
                        }
                        else {

-                               push @add, $file;
+                               push @new, $file;

                                if ($config{getctime} && -e "$config{srcdir}/$file") {
                                        eval {
                                                my $time=rcs_getctime("$config{srcdir}/$file");
                                if ($config{getctime} && -e "$config{srcdir}/$file") {
                                        eval {
                                                my $time=rcs_getctime("$config{srcdir}/$file");


@@ -419,32 +375,60 @@ sub refresh () {
                        }
                }
        }
                        }
                }
        }

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

        foreach my $page (keys %pagemtime) {
        foreach my $page (keys %pagemtime) {

-               if (! $exists->{$page}) {
+               if (! $pages->{$page}) {

                        if (isinternal($page)) {
                        if (isinternal($page)) {

-                               push @internal, $pagesources{$page};
+                               push @internal_del, $pagesources{$page};

                        }
                        else {
                        }
                        else {

-                               debug(sprintf(gettext("removing old page %s"), $page));

                                push @del, $pagesources{$page};
                        }
                                push @del, $pagesources{$page};
                        }

+                       $dellinks{$page}= $links{$page};

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

+                       $delrenderedfiles{$page}= $renderedfiles{$page};

                        $renderedfiles{$page}=[];
                        $pagemtime{$page}=0;
                        $renderedfiles{$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};
-                               }
+               }
+       }
+
+       return \@del, \@internal_del;
+}
+
+sub remove_del (@) {
+       foreach my $file (@_) {
+               my $page=pagename($file);
+               if (! isinternal($page)) {
+                       debug(sprintf(gettext("removing old page %s"), $page));
+               }
+       
+               foreach my $old (@{$oldrenderedfiles{$page}}) {
+                       prune($config{destdir}."/".$old);
+               }
+
+               foreach my $source (keys %destsources) {
+                       if ($destsources{$source} eq $page) {
+                               delete $destsources{$source};

                        }
                }
                        }
                }

+       
+               delete $pagecase{lc $page};
+               delete $pagesources{$page};

        }
        }

+}

 
 

-       # find changed and new files
-       my @needsbuild;
+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);
        foreach my $file (@$files) {
                my $page=pagename($file);
                my ($srcfile, @stat)=srcfile_stat($file);


@@ -452,161 +436,265 @@ sub refresh () {
                    $stat[9] > $pagemtime{$page} ||
                    $forcerebuild{$page}) {
                        $pagemtime{$page}=$stat[9];
                    $stat[9] > $pagemtime{$page} ||
                    $forcerebuild{$page}) {
                        $pagemtime{$page}=$stat[9];

+

                        if (isinternal($page)) {
                        if (isinternal($page)) {

-                               push @internal_change, $file;

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

+                               push @internal_changed, $file;

                        }
                        else {
                        }
                        else {

-                               push @needsbuild, $file;
+                               push @changed, $file;

                        }
                }
        }
                        }
                }
        }

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

 
 

-       # scan and render 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_links();
-       foreach my $file (@needsbuild) {
-               debug(sprintf(gettext("building %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};

        }
        }

-       foreach my $file (@internal, @internal_change) {
-               # 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}=[];
+}
+
+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);
+                       }

                }
                }

-               $renderedfiles{$page}=[];

        }
        }

-       
-       # 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("building %s, which links to %s"), $file, $p));
-                               render($file);
-                               $rendered{$file}=1;
+}
+
+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};
+                       }
+               }
+               if (exists $oldlink_targets->{$page} &&
+                   %{$oldlink_targets->{$page}}) {
+                       foreach my $target (values %{$oldlink_targets->{$page}}) {
+                               $backlinkchanged{$target}=1;

                        }
                        }

+                       $linkchangers{lc($page)}=1;

                }
        }
 
                }
        }
 

-       if (%rendered || @del || @internal || @internal_change) {
-               my @changed=(keys %rendered, @del);
-               my ($linkchanged, $linkchangers)=find_changed_links(@changed);
+       return \%backlinkchanged, \%linkchangers;
+}
+
+sub render_dependent ($$$$$$$) {
+       my ($files, $new, $internal_new, $del, $internal_del,
+               $internal_changed, $linkchangers)=@_;

 
 

-               my $unsettled;
-               do {
-                       $unsettled=0;
-                       @changed=(keys %rendered, @del);
-                       my @exists_changed=(@add, @del);
+       my @changed=(keys %rendered, @$del);
+       my @exists_changed=(@$new, @$del);

        
        

-                       my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
-                       my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;
+       my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
+       my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;

         
         

-                       # rebuild dependant pages
-                       foreach my $f (@$files) {
-                               next if $rendered{$f};
-                               my $p=pagename($f);
-                               my $reason = undef;
+       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{$p}}) {
-                                               if (($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 $depends_simple{$p}) {
+                       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 $depends{$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
-                                               my $internal_dep=$d =~ /internal\(/;
-
-                                               my @candidates;
-                                               if ($depends{$p}{$d} & $IkiWiki::DEPEND_PRESENCE) {
-                                                       @candidates=@exists_changed;
-                                                       push @candidates, @internal
-                                                               if $internal_dep;
-                                               }
-                                               if (($depends{$p}{$d} & ($IkiWiki::DEPEND_CONTENT | $IkiWiki::DEPEND_LINKS))) {
-                                                       @candidates=@changed;
-                                                       push @candidates, @internal, @internal_change
-                                                               if $internal_dep;
-                                               }
-
-                                               foreach my $file (@candidates) {
-                                                       next if $file eq $f;
-                                                       my $page=pagename($file);
-                                                       if ($sub->($page, location => $p)) {
-                                                               if ($depends{$p}{$d} & $IkiWiki::DEPEND_LINKS) {
-                                                                       next unless $linkchangers->{lc($page)};
-                                                               }
-                                                               $reason = $page;
-                                                               last D;
+               if (exists $depends{$p} && ! defined $reason) {
+                       foreach my $dep (keys %{$depends{$p}}) {
+                               my $sub=pagespec_translate($dep);
+                               next if $@ || ! defined $sub;
+
+                               # only consider internal files
+                               # if the page explicitly depends
+                               # on such files
+                               my $internal_dep=$dep =~ /internal\(/;
+
+                               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)};

                                                        }
                                                        }

+                                                       return $page;

                                                }
                                        }
                                                }
                                        }

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

                                }
                                }

-       
-                               if (defined $reason) {
-                                       debug(sprintf(gettext("building %s, which depends on %s"), $f, $reason));
-                                       render($f);
-                                       $rendered{$f}=1;
-                                       $unsettled=1;
-                                       last;
+                               if ($depends{$p}{$dep} & $IkiWiki::DEPEND_PRESENCE) {
+                                       last if $reason = 
+                                               $in->(\@exists_changed, $IkiWiki::DEPEND_PRESENCE);
+                                       last if $internal_dep && ($reason =
+                                               $in->($internal_new, $IkiWiki::DEPEND_PRESENCE) ||
+                                               $in->($internal_del, $IkiWiki::DEPEND_PRESENCE));
+                               }
+                               if ($depends{$p}{$dep} & $IkiWiki::DEPEND_LINKS) {
+                                       last if $reason =
+                                               $in->(\@changed, $IkiWiki::DEPEND_LINKS);
+                                       last if $internal_dep && ($reason =
+                                               $in->($internal_new, $IkiWiki::DEPEND_LINKS) ||
+                                               $in->($internal_del, $IkiWiki::DEPEND_LINKS) ||
+                                               $in->($internal_changed, $IkiWiki::DEPEND_LINKS));

                                }
                        }
                                }
                        }

-               } while $unsettled;
-               
-               # update backlinks at end
-               foreach my $link (keys %{$linkchanged}) {
-                       my $linkfile=$pagesources{$link};
-                       if (defined $linkfile) {
-                               next if $rendered{$linkfile};
-                               debug(sprintf(gettext("building %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 built 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"), $linkfile));
+               }
+       }
+}
+
+sub refresh () {
+       srcdir_check();
+       run_hooks(refresh => sub { shift->() });
+       my ($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 { shift->($changed) });
+       my $oldlink_targets=calculate_old_links($changed, $del);
+
+       foreach my $file (@$changed) {
+               scan($file);
+       }
+
+       my %del_hash = map {$_, 1} @$del;
+       while (my $autofile = shift (@autofiles)) {
+               my $page=pagename($autofile);
+    if (exists $del_hash{$page}) {
+                       $links{$page}= $dellinks{$page};
+                       $renderedfiles{$page}= $delrenderedfiles{$page};
+                       delete $del_hash{$page};

                }
                }

+               if ($pages->{$page}) {
+                       debug(sprintf(gettext("%s has multiple possible source pages"), $page));
+               }
+               $pages->{$page}=1;
+
+               push @{$files}, $autofile;
+               push @{$new}, $autofile if find_new_files([$autofile]);
+               push @{$changed}, $autofile if find_changed([$autofile]);
+
+               scan($autofile);
+       }
+       $del = [keys %del_hash];
+
+       calculate_links();
+       
+       remove_del(@$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($file);
+       }
+
+       my ($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) {
-               run_hooks(delete => sub { shift->(@del) });
+       if (@$del) {
+               run_hooks(delete => sub { shift->(@$del) });

        }
        if (%rendered) {
                run_hooks(change => sub { shift->(keys %rendered) });
        }
        if (%rendered) {
                run_hooks(change => sub { shift->(keys %rendered) });