IkiWiki/Render.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4
   5 use warnings;
   6 use strict;
   7 use IkiWiki;
   8
   9 my (%backlinks, %rendered);
  10 our %brokenlinks;
  11 my $links_calculated=0;
  12
  13 sub calculate_links () {
  14         return if $links_calculated;
  15         %backlinks=%brokenlinks=();
  16         foreach my $page (keys %links) {
  17                 foreach my $link (@{$links{$page}}) {
  18                         my $bestlink=bestlink($page, $link);
  19                         if (length $bestlink) {
  20                                 $backlinks{$bestlink}{$page}=1
  21                                         if $bestlink ne $page;
  22                         }
  23                         else {
  24                                 push @{$brokenlinks{$link}}, $page;
  25                         }
  26                 }
  27         }
  28         $links_calculated=1;
  29 }
  30
  31 sub backlink_pages ($) {
  32         my $page=shift;
  33
  34         calculate_links();
  35
  36         return keys %{$backlinks{$page}};
  37 }
  38
  39 sub backlinks ($) {
  40         my $page=shift;
  41
  42         my @links;
  43         foreach my $p (backlink_pages($page)) {
  44                 my $href=urlto($p, $page);
  45
  46                 # Trim common dir prefixes from both pages.
  47                 my $p_trimmed=$p;
  48                 my $page_trimmed=$page;
  49                 my $dir;
  50                 1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
  51                         defined $dir &&
  52                         $p_trimmed=~s/^\Q$dir\E// &&
  53                         $page_trimmed=~s/^\Q$dir\E//;
  54
  55                 push @links, { url => $href, page => pagetitle($p_trimmed) };
  56         }
  57         return @links;
  58 }
  59
  60 sub genpage ($$) {
  61         my $page=shift;
  62         my $content=shift;
  63
  64         run_hooks(indexhtml => sub {
  65                 shift->(page => $page, destpage => $page, content => $content);
  66         });
  67
  68         my $templatefile;
  69         run_hooks(templatefile => sub {
  70                 return if defined $templatefile;
  71                 my $file=shift->(page => $page);
  72                 if (defined $file && defined template_file($file)) {
  73                         $templatefile=$file;
  74                 }
  75         });
  76         my $template;
  77         if (defined $templatefile) {
  78                 $template=template_depends($templatefile, $page,
  79                         blind_cache => 1);
  80         }
  81         else {
  82                 # no explicit depends as special case
  83                 $template=template('page.tmpl',
  84                         blind_cache => 1);
  85         }
  86
  87         my $actions=0;
  88         if (length $config{cgiurl}) {
  89                 if (IkiWiki->can("cgi_editpage")) {
  90                         $template->param(editurl => cgiurl(do => "edit", page => $page));
  91                         $actions++;
  92                 }
  93         }
  94         if (defined $config{historyurl} && length $config{historyurl}) {
  95                 my $u=$config{historyurl};
  96                 my $p=uri_escape_utf8($pagesources{$page}, '^A-Za-z0-9\-\._~/');
  97                 $u=~s/\[\[file\]\]/$p/g;
  98                 $template->param(historyurl => $u);
  99                 $actions++;
 100         }
 101         if ($config{discussion}) {
 102                 if ($page !~ /.*\/\Q$config{discussionpage}\E$/i &&
 103                    (length $config{cgiurl} ||
 104                     exists $links{$page."/".$config{discussionpage}})) {
 105                         $template->param(discussionlink => htmllink($page, $page, $config{discussionpage}, noimageinline => 1, forcesubpage => 1));
 106                         $actions++;
 107                 }
 108         }
 109         if ($actions) {
 110                 $template->param(have_actions => 1);
 111         }
 112         templateactions($template, $page);
 113
 114         my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
 115         my ($backlinks, $more_backlinks);
 116         if (@backlinks <= $config{numbacklinks} || ! $config{numbacklinks}) {
 117                 $backlinks=\@backlinks;
 118                 $more_backlinks=[];
 119         }
 120         else {
 121                 $backlinks=[@backlinks[0..$config{numbacklinks}-1]];
 122                 $more_backlinks=[@backlinks[$config{numbacklinks}..$#backlinks]];
 123         }
 124
 125         $template->param(
 126                 title => $page eq 'index'
 127                         ? $config{wikiname}
 128                         : pagetitle(basename($page)),
 129                 wikiname => $config{wikiname},
 130                 content => $content,
 131                 backlinks => $backlinks,
 132                 more_backlinks => $more_backlinks,
 133                 mtime => displaytime($pagemtime{$page}),
 134                 ctime => displaytime($pagectime{$page}, undef, 1),
 135                 baseurl => baseurl($page),
 136                 html5 => $config{html5},
 137         );
 138
 139         run_hooks(pagetemplate => sub {
 140                 shift->(page => $page, destpage => $page, template => $template);
 141         });
 142
 143         $content=$template->output;
 144
 145         run_hooks(format => sub {
 146                 $content=shift->(
 147                         page => $page,
 148                         content => $content,
 149                 );
 150         });
 151
 152         return $content;
 153 }
 154
 155 sub scan ($) {
 156         my $file=shift;
 157
 158         debug(sprintf(gettext("scanning %s"), $file));
 159
 160         my $type=pagetype($file);
 161         if (defined $type) {
 162                 my $srcfile=srcfile($file);
 163                 my $content=readfile($srcfile);
 164                 my $page=pagename($file);
 165                 will_render($page, htmlpage($page), 1);
 166
 167                 if ($config{discussion}) {
 168                         # Discussion links are a special case since they're
 169                         # not in the text of the page, but on its template.
 170                         $links{$page}=[ $page."/".lc($config{discussionpage}) ];
 171                 }
 172                 else {
 173                         $links{$page}=[];
 174                 }
 175                 delete $typedlinks{$page};
 176
 177                 # Preprocess in scan-only mode.
 178                 preprocess($page, $page, $content, 1);
 179
 180                 run_hooks(scan => sub {
 181                         shift->(
 182                                 page => $page,
 183                                 content => $content,
 184                         );
 185                 });
 186         }
 187         else {
 188                 will_render($file, $file, 1);
 189         }
 190 }
 191
 192 sub fast_file_copy (@) {
 193         my $srcfile=shift;
 194         my $destfile=shift;
 195         my $srcfd=shift;
 196         my $destfd=shift;
 197         my $cleanup=shift;
 198
 199         my $blksize = 16384;
 200         my ($len, $buf, $written);
 201         while ($len = sysread $srcfd, $buf, $blksize) {
 202                 if (! defined $len) {
 203                         next if $! =~ /^Interrupted/;
 204                         error("failed to read $srcfile: $!", $cleanup);
 205                 }
 206                 my $offset = 0;
 207                 while ($len) {
 208                         defined($written = syswrite $destfd, $buf, $len, $offset)
 209                                 or error("failed to write $destfile: $!", $cleanup);
 210                         $len -= $written;
 211                         $offset += $written;
 212                 }
 213         }
 214 }
 215
 216 sub render ($$) {
 217         my $file=shift;
 218         return if $rendered{$file};
 219         debug(shift);
 220         $rendered{$file}=1;
 221
 222         my $type=pagetype($file);
 223         my $srcfile=srcfile($file);
 224         if (defined $type) {
 225                 my $page=pagename($file);
 226                 delete $depends{$page};
 227                 delete $depends_simple{$page};
 228                 will_render($page, htmlpage($page), 1);
 229                 return if $type=~/^_/;
 230
 231                 my $content=htmlize($page, $page, $type,
 232                         linkify($page, $page,
 233                         preprocess($page, $page,
 234                         filter($page, $page,
 235                         readfile($srcfile)))));
 236
 237                 my $output=htmlpage($page);
 238                 writefile($output, $config{destdir}, genpage($page, $content));
 239         }
 240         else {
 241                 delete $depends{$file};
 242                 delete $depends_simple{$file};
 243                 will_render($file, $file, 1);
 244
 245                 if ($config{hardlink}) {
 246                         # only hardlink if owned by same user
 247                         my @stat=stat($srcfile);
 248                         if ($stat[4] == $>) {
 249                                 prep_writefile($file, $config{destdir});
 250                                 unlink($config{destdir}."/".$file);
 251                                 if (link($srcfile, $config{destdir}."/".$file)) {
 252                                         return;
 253                                 }
 254                         }
 255                         # if hardlink fails, fall back to copying
 256                 }
 257
 258                 my $srcfd=readfile($srcfile, 1, 1);
 259                 writefile($file, $config{destdir}, undef, 1, sub {
 260                         fast_file_copy($srcfile, $file, $srcfd, @_);
 261                 });
 262         }
 263 }
 264
 265 sub prune ($) {
 266         my $file=shift;
 267
 268         unlink($file);
 269         my $dir=dirname($file);
 270         while (rmdir($dir)) {
 271                 $dir=dirname($dir);
 272         }
 273 }
 274
 275 sub srcdir_check () {
 276         # security check, avoid following symlinks in the srcdir path by default
 277         my $test=$config{srcdir};
 278         while (length $test) {
 279                 if (-l $test && ! $config{allow_symlinks_before_srcdir}) {
 280                         error(sprintf(gettext("symlink found in srcdir path (%s) -- set allow_symlinks_before_srcdir to allow this"), $test));
 281                 }
 282                 unless ($test=~s/\/+$//) {
 283                         $test=dirname($test);
 284                 }
 285         }
 286
 287 }
 288
 289 sub find_src_files () {
 290         my @files;
 291         my %pages;
 292         eval q{use File::Find};
 293         error($@) if $@;
 294
 295         eval q{use Cwd};
 296         die $@ if $@;
 297         my $origdir=getcwd();
 298         my $abssrcdir=Cwd::abs_path($config{srcdir});
 299
 300         my ($page, $underlay);
 301         my $helper=sub {
 302                 my $file=decode_utf8($_);
 303
 304                 return if -l $file || -d _;
 305                 $file=~s/^\.\///;
 306                 return if ! length $file;
 307                 $page = pagename($file);
 308                 if (! exists $pagesources{$page} &&
 309                     file_pruned($file)) {
 310                         $File::Find::prune=1;
 311                         return;
 312                 }
 313
 314                 my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
 315                 if (! defined $f) {
 316                         warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
 317                         return;
 318                 }
 319
 320                 if ($underlay) {
 321                         # avoid underlaydir override attacks; see security.mdwn
 322                         if (! -l "$abssrcdir/$f" && ! -e _) {
 323                                 if (! $pages{$page}) {
 324                                         push @files, $f;
 325                                         $pages{$page}=1;
 326                                 }
 327                         }
 328                 }
 329                 else {
 330                         push @files, $f;
 331                         if ($pages{$page}) {
 332                                 debug(sprintf(gettext("%s has multiple possible source pages"), $page));
 333                         }
 334                         $pages{$page}=1;
 335                 }
 336         };
 337
 338         chdir($config{srcdir}) || die "chdir $config{srcdir}: $!";
 339         find({
 340                 no_chdir => 1,
 341                 wanted => $helper,
 342         }, '.');
 343         chdir($origdir) || die "chdir $origdir: $!";
 344
 345         $underlay=1;
 346         foreach (@{$config{underlaydirs}}, $config{underlaydir}) {
 347                 if (chdir($_)) {
 348                         find({
 349                                 no_chdir => 1,
 350                                 wanted => $helper,
 351                         }, '.');
 352                         chdir($origdir) || die "chdir: $!";
 353                 }
 354         };
 355
 356         return \@files, \%pages;
 357 }
 358
 359 sub find_new_files ($) {
 360         my $files=shift;
 361         my @new;
 362         my @internal_new;
 363
 364         my $times_noted;
 365
 366         foreach my $file (@$files) {
 367                 my $page=pagename($file);
 368
 369                 if ($config{rcs} && $config{gettime} &&
 370                     -e "$config{srcdir}/$file") {
 371                         if (! $times_noted) {
 372                                 debug(sprintf(gettext("querying %s for file creation and modification times.."), $config{rcs}));
 373                                 $times_noted=1;
 374                         }
 375
 376                         eval {
 377                                 my $ctime=rcs_getctime($file);
 378                                 if ($ctime > 0) {
 379                                         $pagectime{$page}=$ctime;
 380                                 }
 381                         };
 382                         if ($@) {
 383                                 print STDERR $@;
 384                         }
 385                         my $mtime;
 386                         eval {
 387                                 $mtime=rcs_getmtime($file);
 388                         };
 389                         if ($@) {
 390                                 print STDERR $@;
 391                         }
 392                         elsif ($mtime > 0) {
 393                                 utime($mtime, $mtime, "$config{srcdir}/$file");
 394                         }
 395                 }
 396
 397                 if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
 398                         # the page has changed its type
 399                         $forcerebuild{$page}=1;
 400                 }
 401                 $pagesources{$page}=$file;
 402                 if (! $pagemtime{$page}) {
 403                         if (isinternal($page)) {
 404                                 push @internal_new, $file;
 405                         }
 406                         else {
 407                                 push @new, $file;
 408                         }
 409                         $pagecase{lc $page}=$page;
 410                         if (! exists $pagectime{$page}) {
 411                                 $pagectime{$page}=(srcfile_stat($file))[10];
 412                         }
 413                 }
 414         }
 415
 416         return \@new, \@internal_new;
 417 }
 418
 419 sub find_del_files ($) {
 420         my $pages=shift;
 421         my @del;
 422         my @internal_del;
 423
 424         foreach my $page (keys %pagesources) {
 425                 if (! $pages->{$page}) {
 426                         if (isinternal($page)) {
 427                                 push @internal_del, $pagesources{$page};
 428                         }
 429                         else {
 430                                 push @del, $pagesources{$page};
 431                         }
 432                         $links{$page}=[];
 433                         delete $typedlinks{$page};
 434                         $renderedfiles{$page}=[];
 435                         $pagemtime{$page}=0;
 436                 }
 437         }
 438
 439         return \@del, \@internal_del;
 440 }
 441
 442 sub remove_del (@) {
 443         foreach my $file (@_) {
 444                 my $page=pagename($file);
 445                 if (! isinternal($page)) {
 446                         debug(sprintf(gettext("removing obsolete %s"), $page));
 447                 }
 448
 449                 foreach my $old (@{$oldrenderedfiles{$page}}) {
 450                         prune($config{destdir}."/".$old);
 451                 }
 452
 453                 foreach my $source (keys %destsources) {
 454                         if ($destsources{$source} eq $page) {
 455                                 delete $destsources{$source};
 456                         }
 457                 }
 458
 459                 delete $pagecase{lc $page};
 460                 $delpagesources{$page}=$pagesources{$page};
 461                 delete $pagesources{$page};
 462         }
 463 }
 464
 465 sub find_changed ($) {
 466         my $files=shift;
 467         my @changed;
 468         my @internal_changed;
 469         foreach my $file (@$files) {
 470                 my $page=pagename($file);
 471                 my ($srcfile, @stat)=srcfile_stat($file);
 472                 if (! exists $pagemtime{$page} ||
 473                     $stat[9] > $pagemtime{$page} ||
 474                     $forcerebuild{$page}) {
 475                         $pagemtime{$page}=$stat[9];
 476
 477                         if (isinternal($page)) {
 478                                 my $content = readfile($srcfile);
 479
 480                                 # Preprocess internal page in scan-only mode.
 481                                 preprocess($page, $page, $content, 1);
 482
 483                                 run_hooks(scan => sub {
 484                                         shift->(
 485                                                 page => $page,
 486                                                 content => $content,
 487                                         );
 488                                 });
 489
 490                                 push @internal_changed, $file;
 491                         }
 492                         else {
 493                                 push @changed, $file;
 494                         }
 495                 }
 496         }
 497         return \@changed, \@internal_changed;
 498 }
 499
 500 sub calculate_old_links ($$) {
 501         my ($changed, $del)=@_;
 502         my %oldlink_targets;
 503         foreach my $file (@$changed, @$del) {
 504                 my $page=pagename($file);
 505                 if (exists $oldlinks{$page}) {
 506                         foreach my $l (@{$oldlinks{$page}}) {
 507                                 $oldlink_targets{$page}{$l}=bestlink($page, $l);
 508                         }
 509                 }
 510         }
 511         return \%oldlink_targets;
 512 }
 513
 514 sub derender_internal ($) {
 515         my $file=shift;
 516         my $page=pagename($file);
 517         delete $depends{$page};
 518         delete $depends_simple{$page};
 519         foreach my $old (@{$renderedfiles{$page}}) {
 520                 delete $destsources{$old};
 521         }
 522         $renderedfiles{$page}=[];
 523 }
 524
 525 sub render_linkers ($) {
 526         my $f=shift;
 527         my $p=pagename($f);
 528         foreach my $page (keys %{$backlinks{$p}}) {
 529                 my $file=$pagesources{$page};
 530                 render($file, sprintf(gettext("building %s, which links to %s"), $file, $p));
 531         }
 532 }
 533
 534 sub remove_unrendered () {
 535         foreach my $src (keys %rendered) {
 536                 my $page=pagename($src);
 537                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 538                         if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
 539                                 debug(sprintf(gettext("removing %s, no longer built by %s"), $file, $page));
 540                                 prune($config{destdir}."/".$file);
 541                         }
 542                 }
 543         }
 544 }
 545
 546 sub link_types_changed ($$) {
 547         # each is of the form { type => { link => 1 } }
 548         my $new = shift;
 549         my $old = shift;
 550
 551         return 0 if !defined $new && !defined $old;
 552         return 1 if (!defined $new && %$old) || (!defined $old && %$new);
 553
 554         while (my ($type, $links) = each %$new) {
 555                 foreach my $link (keys %$links) {
 556                         return 1 unless exists $old->{$type}{$link};
 557                 }
 558         }
 559
 560         while (my ($type, $links) = each %$old) {
 561                 foreach my $link (keys %$links) {
 562                         return 1 unless exists $new->{$type}{$link};
 563                 }
 564         }
 565
 566         return 0;
 567 }
 568
 569 sub calculate_changed_links ($$$) {
 570         my ($changed, $del, $oldlink_targets)=@_;
 571
 572         my (%backlinkchanged, %linkchangers);
 573
 574         foreach my $file (@$changed, @$del) {
 575                 my $page=pagename($file);
 576
 577                 if (exists $links{$page}) {
 578                         foreach my $l (@{$links{$page}}) {
 579                                 my $target=bestlink($page, $l);
 580                                 if (! exists $oldlink_targets->{$page}{$l} ||
 581                                     $target ne $oldlink_targets->{$page}{$l}) {
 582                                         $backlinkchanged{$target}=1;
 583                                         $linkchangers{lc($page)}=1;
 584                                 }
 585                                 delete $oldlink_targets->{$page}{$l};
 586                         }
 587                 }
 588                 if (exists $oldlink_targets->{$page} &&
 589                     %{$oldlink_targets->{$page}}) {
 590                         foreach my $target (values %{$oldlink_targets->{$page}}) {
 591                                 $backlinkchanged{$target}=1;
 592                         }
 593                         $linkchangers{lc($page)}=1;
 594                 }
 595
 596                 # we currently assume that changing the type of a link doesn't
 597                 # change backlinks
 598                 if (!exists $linkchangers{lc($page)}) {
 599                         if (link_types_changed($typedlinks{$page}, $oldtypedlinks{$page})) {
 600                                 $linkchangers{lc($page)}=1;
 601                         }
 602                 }
 603         }
 604
 605         return \%backlinkchanged, \%linkchangers;
 606 }
 607
 608 sub render_dependent ($$$$$$$) {
 609         my ($files, $new, $internal_new, $del, $internal_del,
 610                 $internal_changed, $linkchangers)=@_;
 611
 612         my @changed=(keys %rendered, @$del);
 613         my @exists_changed=(@$new, @$del);
 614
 615         my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
 616         my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;
 617
 618         foreach my $p ("templates/page.tmpl", keys %{$depends_simple{""}}) {
 619                 if ($rendered{$p} || grep { $_ eq $p } @$del) {
 620                         foreach my $f (@$files) {
 621                                 next if $rendered{$f};
 622                                 render($f, sprintf(gettext("building %s, which depends on %s"), $f, $p));
 623                         }
 624                         return 0;
 625                 }
 626         }
 627
 628         foreach my $f (@$files) {
 629                 next if $rendered{$f};
 630                 my $p=pagename($f);
 631                 my $reason = undef;
 632
 633                 if (exists $depends_simple{$p} && ! defined $reason) {
 634                         foreach my $d (keys %{$depends_simple{$p}}) {
 635                                 if (($depends_simple{$p}{$d} & $IkiWiki::DEPEND_CONTENT &&
 636                                      $lc_changed{$d})
 637                                     ||
 638                                     ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_PRESENCE &&
 639                                      $lc_exists_changed{$d})
 640                                     ||
 641                                     ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_LINKS &&
 642                                      $linkchangers->{$d})
 643                                 ) {
 644                                         $reason = $d;
 645                                         last;
 646                                 }
 647                         }
 648                 }
 649
 650                 if (exists $depends{$p} && ! defined $reason) {
 651                         foreach my $dep (keys %{$depends{$p}}) {
 652                                 my $sub=pagespec_translate($dep);
 653                                 next unless defined $sub;
 654
 655                                 # only consider internal files
 656                                 # if the page explicitly depends
 657                                 # on such files
 658                                 my $internal_dep=$dep =~ /(?:internal|comment|comment_pending)\(/;
 659
 660                                 my $in=sub {
 661                                         my $list=shift;
 662                                         my $type=shift;
 663                                         foreach my $file (@$list) {
 664                                                 next if $file eq $f;
 665                                                 my $page=pagename($file);
 666                                                 if ($sub->($page, location => $p)) {
 667                                                         if ($type == $IkiWiki::DEPEND_LINKS) {
 668                                                                 next unless $linkchangers->{lc($page)};
 669                                                         }
 670                                                         $reason=$page;
 671                                                         return 1;
 672                                                 }
 673                                         }
 674                                         return undef;
 675                                 };
 676
 677                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_CONTENT) {
 678                                         last if $in->(\@changed, $IkiWiki::DEPEND_CONTENT);
 679                                         last if $internal_dep && (
 680                                                 $in->($internal_new, $IkiWiki::DEPEND_CONTENT) ||
 681                                                 $in->($internal_del, $IkiWiki::DEPEND_CONTENT) ||
 682                                                 $in->($internal_changed, $IkiWiki::DEPEND_CONTENT)
 683                                         );
 684                                 }
 685                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_PRESENCE) {
 686                                         last if $in->(\@exists_changed, $IkiWiki::DEPEND_PRESENCE);
 687                                         last if $internal_dep && (
 688                                                 $in->($internal_new, $IkiWiki::DEPEND_PRESENCE) ||
 689                                                 $in->($internal_del, $IkiWiki::DEPEND_PRESENCE)
 690                                         );
 691                                 }
 692                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_LINKS) {
 693                                         last if $in->(\@changed, $IkiWiki::DEPEND_LINKS);
 694                                         last if $internal_dep && (
 695                                                 $in->($internal_new, $IkiWiki::DEPEND_LINKS) ||
 696                                                 $in->($internal_del, $IkiWiki::DEPEND_LINKS) ||
 697                                                 $in->($internal_changed, $IkiWiki::DEPEND_LINKS)
 698                                         );
 699                                 }
 700                         }
 701                 }
 702
 703                 if (defined $reason) {
 704                         render($f, sprintf(gettext("building %s, which depends on %s"), $f, $reason));
 705                         return 1;
 706                 }
 707         }
 708
 709         return 0;
 710 }
 711
 712 sub render_backlinks ($) {
 713         my $backlinkchanged=shift;
 714         foreach my $link (keys %$backlinkchanged) {
 715                 my $linkfile=$pagesources{$link};
 716                 if (defined $linkfile) {
 717                         render($linkfile, sprintf(gettext("building %s, to update its backlinks"), $linkfile));
 718                 }
 719         }
 720 }
 721
 722 sub gen_autofile ($$$) {
 723         my $autofile=shift;
 724         my $pages=shift;
 725         my $del=shift;
 726
 727         if (file_pruned($autofile)) {
 728                 return;
 729         }
 730
 731         my ($file)="$config{srcdir}/$autofile" =~ /$config{wiki_file_regexp}/; # untaint
 732         if (! defined $file) {
 733                 return;
 734         }
 735
 736         # Remember autofiles that were tried, and never try them again later.
 737         if (exists $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}) {
 738                 return;
 739         }
 740         $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}=1;
 741
 742         if (srcfile($autofile, 1) || file_pruned($autofile)) {
 743                 return;
 744         }
 745
 746         if (-l $file || -d _ || -e _) {
 747                 return;
 748         }
 749
 750         my $page = pagename($file);
 751         if ($pages->{$page}) {
 752                 return;
 753         }
 754
 755         if (grep { $_ eq $autofile } @$del) {
 756                 return;
 757         }
 758
 759         $autofiles{$autofile}{generator}->();
 760         $pages->{$page}=1;
 761         return 1;
 762 }
 763
 764
 765 sub refresh () {
 766         srcdir_check();
 767         run_hooks(refresh => sub { shift->() });
 768         my ($files, $pages)=find_src_files();
 769         my ($new, $internal_new)=find_new_files($files);
 770         my ($del, $internal_del)=find_del_files($pages);
 771         my ($changed, $internal_changed)=find_changed($files);
 772         run_hooks(needsbuild => sub {
 773                 my $ret=shift->($changed, [@$del, @$internal_del]);
 774                 $changed=$ret if ref $ret eq 'ARRAY';
 775         });
 776         my $oldlink_targets=calculate_old_links($changed, $del);
 777
 778         foreach my $file (@$changed) {
 779                 scan($file);
 780         }
 781
 782         foreach my $autofile (keys %autofiles) {
 783                 if (gen_autofile($autofile, $pages, $del)) {
 784                         push @{$files}, $autofile;
 785                         push @{$new}, $autofile if find_new_files([$autofile]);
 786                         push @{$changed}, $autofile if find_changed([$autofile]);
 787
 788                         scan($autofile);
 789                 }
 790         }
 791
 792         calculate_links();
 793
 794         remove_del(@$del, @$internal_del);
 795
 796         foreach my $file (@$changed) {
 797                 render($file, sprintf(gettext("building %s"), $file));
 798         }
 799         foreach my $file (@$internal_new, @$internal_del, @$internal_changed) {
 800                 derender_internal($file);
 801         }
 802
 803         run_hooks(build_affected => sub {
 804                 my %affected = shift->();
 805                 while (my ($page, $message) = each %affected) {
 806                         next unless exists $pagesources{$page};
 807                         render($pagesources{$page}, $message);
 808                 }
 809         });
 810
 811         my ($backlinkchanged, $linkchangers)=calculate_changed_links($changed,
 812                 $del, $oldlink_targets);
 813
 814         foreach my $file (@$new, @$del) {
 815                 render_linkers($file);
 816         }
 817
 818         if (@$changed || @$internal_changed ||
 819             @$del || @$internal_del || @$internal_new) {
 820                 1 while render_dependent($files, $new, $internal_new,
 821                         $del, $internal_del, $internal_changed,
 822                         $linkchangers);
 823         }
 824
 825         render_backlinks($backlinkchanged);
 826         remove_unrendered();
 827
 828         if (@$del || @$internal_del) {
 829                 run_hooks(delete => sub { shift->(@$del, @$internal_del) });
 830         }
 831         if (%rendered) {
 832                 run_hooks(change => sub { shift->(keys %rendered) });
 833         }
 834 }
 835
 836 sub clean_rendered {
 837         lockwiki();
 838         loadindex();
 839         remove_unrendered();
 840         foreach my $page (keys %oldrenderedfiles) {
 841                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 842                         prune($config{destdir}."/".$file);
 843                 }
 844         }
 845 }
 846
 847 sub commandline_render () {
 848         lockwiki();
 849         loadindex();
 850         unlockwiki();
 851
 852         my $srcfile=possibly_foolish_untaint($config{render});
 853         my $file=$srcfile;
 854         $file=~s/\Q$config{srcdir}\E\/?//;
 855
 856         my $type=pagetype($file);
 857         die sprintf(gettext("ikiwiki: cannot build %s"), $srcfile)."\n" unless defined $type;
 858         my $content=readfile($srcfile);
 859         my $page=pagename($file);
 860         $pagesources{$page}=$file;
 861         $content=filter($page, $page, $content);
 862         $content=preprocess($page, $page, $content);
 863         $content=linkify($page, $page, $content);
 864         $content=htmlize($page, $page, $type, $content);
 865         $pagemtime{$page}=(stat($srcfile))[9];
 866         $pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};
 867
 868         print genpage($page, $content);
 869         exit 0;
 870 }
 871
 872 1