]> sipb.mit.edu Git - ikiwiki.git/blobdiff - IkiWiki/Render.pm
refresh refactor 2
[ikiwiki.git] / IkiWiki / Render.pm
index 5367b13092f58f45cb92e116caced874fbf4be96..5336d4f545e3bc7cff7cc606fc91432e2e3721bd 100644 (file)
@@ -7,7 +7,9 @@ use strict;
 use IkiWiki;
 use Encode;
 
-my %backlinks;
+my (%backlinks, %rendered, @new, @del, @internal, @internal_change, @files,
+       %page_exists, %oldlink_targets, %backlinkchanged,
+       %linkchangers);
 our %brokenlinks;
 my $links_calculated=0;
 
@@ -147,6 +149,8 @@ sub genpage ($$) {
 sub scan ($) {
        my $file=shift;
 
+       debug(sprintf(gettext("scanning %s"), $file));
+
        my $type=pagetype($file);
        if (defined $type) {
                my $srcfile=srcfile($file);
@@ -202,15 +206,18 @@ sub fast_file_copy (@) {
        }
 }
 
-sub render ($) {
+sub render ($$) {
        my $file=shift;
+       return if $rendered{$file};
+       debug(shift);
+       $rendered{$file}=1;
        
        my $type=pagetype($file);
        my $srcfile=srcfile($file);
        if (defined $type) {
                my $page=pagename($file);
                delete $depends{$page};
-               delete $depends_exact{$page};
+               delete $depends_simple{$page};
                will_render($page, htmlpage($page), 1);
                return if $type=~/^_/;
                
@@ -225,7 +232,7 @@ sub render ($) {
        }
        else {
                delete $depends{$file};
-               delete $depends_exact{$file};
+               delete $depends_simple{$file};
                will_render($file, $file, 1);
                
                if ($config{hardlink}) {
@@ -273,7 +280,7 @@ sub srcdir_check () {
 }
 
 sub find_src_files () {
-       my (@files, %pages);
+       my @ret;
        eval q{use File::Find};
        error($@) if $@;
        find({
@@ -290,12 +297,12 @@ sub find_src_files () {
                                }
                                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));
+                                       push @ret, $f;
+                                       my $page = pagename($f);
+                                       if ($page_exists{$page}) {
+                                               debug(sprintf(gettext("%s has multiple possible source pages"), $page));
                                        }
-                                       $pages{$pagename}=1;
+                                       $page_exists{$page}=1;
                                }
                        }
                },
@@ -321,9 +328,9 @@ sub find_src_files () {
                                                if (! -l "$config{srcdir}/$f" && 
                                                    ! -e _) {
                                                        my $page=pagename($f);
-                                                       if (! $pages{$page}) {
-                                                               push @files, $f;
-                                                               $pages{$page}=1;
+                                                       if (! $page_exists{$page}) {
+                                                               push @ret, $f;
+                                                               $page_exists{$page}=1;
                                                        }
                                                }
                                        }
@@ -331,20 +338,11 @@ sub find_src_files () {
                        },
                }, $dir);
        };
-
-       # Returns a list of all source files found, and a hash of 
-       # the corresponding page names.
-       return \@files, \%pages;
+       return \@ret;
 }
 
-sub refresh () {
-       srcdir_check();
-       run_hooks(refresh => sub { shift->() });
-       my ($files, $exists)=find_src_files();
-
-       my (%rendered, @add, @del, @internal);
-       # check for added or removed pages
-       foreach my $file (@$files) {
+sub process_new_files () {
+       foreach my $file (@files) {
                my $page=pagename($file);
                if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
                        # the page has changed its type
@@ -356,7 +354,7 @@ sub refresh () {
                                push @internal, $file;
                        }
                        else {
-                               push @add, $file;
+                               push @new, $file;
                                if ($config{getctime} && -e "$config{srcdir}/$file") {
                                        eval {
                                                my $time=rcs_getctime("$config{srcdir}/$file");
@@ -373,8 +371,11 @@ sub refresh () {
                        }
                }
        }
+}
+
+sub process_del_files () {
        foreach my $page (keys %pagemtime) {
-               if (! $exists->{$page}) {
+               if (! $page_exists{$page}) {
                        if (isinternal($page)) {
                                push @internal, $pagesources{$page};
                        }
@@ -396,154 +397,220 @@ sub refresh () {
                        }
                }
        }
+}
 
-       # find changed and new files
+sub find_needsbuild () {
        my @needsbuild;
-       foreach my $file (@$files) {
+       foreach my $file (@files) {
                my $page=pagename($file);
                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);
+                               push @internal_change, $file;
                        }
                        else {
                                push @needsbuild, $file;
                        }
                }
        }
-       run_hooks(needsbuild => sub { shift->(\@needsbuild) });
+       return @needsbuild;
+}
 
-       # scan and render files
-       foreach my $file (@needsbuild) {
-               debug(sprintf(gettext("scanning %s"), $file));
-               scan($file);
+sub calculate_old_links ($) {
+       my $file=shift;
+       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;
+}
+
+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 pages are not rendered
-               my $page=pagename($file);
-               delete $depends{$page};
-               delete $depends_exact{$page};
-               foreach my $old (@{$renderedfiles{$page}}) {
-                       delete $destsources{$old};
-               }
-               $renderedfiles{$page}=[];
+       $renderedfiles{$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));
        }
-       
-       # 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 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);
                        }
                }
        }
+}
 
-       if (%rendered || @del || @internal) {
-               my @changed=(keys %rendered, @del);
-
-               my %lcchanged = map { lc(pagename($_)) => 1 } @changed;
-               # rebuild dependant pages
-               F: foreach my $f (@$files) {
-                       next if $rendered{$f};
-                       my $p=pagename($f);
-
-                       if (exists $depends_exact{$p}) {
-                               foreach my $d (keys %{$depends_exact{$p}}) {
-                                       if (exists $lcchanged{$d}) {
-                                               debug(sprintf(gettext("building %s, which depends on %s"), $f, $d));
-                                               render($f);
-                                               $rendered{$f}=1;
-                                               next F;
-                                       }
-                               }
+sub calculate_changed_links ($) {
+       my $file=shift;
+       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}) {
+                               $backlinkchanged{$l}=1;
+                               $linkchangers{lc($page)}=1;
                        }
+                       delete $oldlink_targets{$page}{$l};
+               }
+       }
+       if (exists $oldlink_targets{$page} &&
+           %{$oldlink_targets{$page}}) {
+               foreach my $target (keys %{$oldlink_targets{$page}}) {
+                       $backlinkchanged{$target}=1;
+               }
+               $linkchangers{lc($page)}=1;
+       }
+}
 
-                       if (exists $depends{$p}) {
-                               foreach my $d (keys %{$depends{$p}}) {
-                                       my $sub=pagespec_translate($d);
-                                       next if $@ || ! defined $sub;
-
-                                       # only consider internal files
-                                       # if the page explicitly depends
-                                       # on such files
-                                       foreach my $file (@changed, $d =~ /internal\(/ ? @internal : ()) {
-                                               next if $file eq $f;
-                                               my $page=pagename($file);
-                                               if ($sub->($page, location => $p)) {
-                                                       debug(sprintf(gettext("building %s, which depends on %s"), $f, $page));
-                                                       render($f);
-                                                       $rendered{$f}=1;
-                                                       next F;
-                                               }
-                                       }
+sub render_dependent () {
+       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 $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;
                                }
                        }
                }
-               
-               # 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 &&
-                                           (! exists $oldlinks{$page} ||
-                                            ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
-                                               $linkchanged{$link}=1;
-                                       }
+       
+               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 (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 (($depends{$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;
                                        }
                                }
                        }
                }
-
-               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 () {
+       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->() });
+       @files=@{find_src_files()};
+       process_new_files();
+       process_del_files();
+
+       my @needsbuild=find_needsbuild();
+       run_hooks(needsbuild => sub { shift->(\@needsbuild) });
+
+       foreach my $file (@needsbuild, @del) {
+               calculate_old_links($file);
+       }
+
+       foreach my $file (@needsbuild) {
+               scan($file);
+       }
+
+       calculate_links();
+
+       foreach my $file (@needsbuild) {
+               render($file, sprintf(gettext("building %s"), $file));
+       }
+       foreach my $file (@internal, @internal_change) {
+               derender_internal($file);
+       }
+
+       foreach my $file (@needsbuild, @del) {
+               calculate_changed_links($file);
+       }
+
+       foreach my $file (@new, @del) {
+               render_linkers($file);
+       }
+       
+       if (@needsbuild || @del || @internal || @internal_change) {
+               1 while render_dependent();
+       }
+
+       render_backlinks();
+       remove_unrendered();
 
        if (@del) {
                run_hooks(delete => sub { shift->(@del) });