git.oblomov.eu Git - ikiwiki/blob - 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         my $up_to=shift;
 268
 269         unlink($file);
 270         my $dir=dirname($file);
 271         while ((! defined $up_to || $dir =~ m{^\Q$up_to\E\/}) && rmdir($dir)) {
 272                 $dir=dirname($dir);
 273         }
 274 }
 275
 276 sub srcdir_check () {
 277         # security check, avoid following symlinks in the srcdir path by default
 278         my $test=$config{srcdir};
 279         while (length $test) {
 280                 if (-l $test && ! $config{allow_symlinks_before_srcdir}) {
 281                         error(sprintf(gettext("symlink found in srcdir path (%s) -- set allow_symlinks_before_srcdir to allow this"), $test));
 282                 }
 283                 unless ($test=~s/\/+$//) {
 284                         $test=dirname($test);
 285                 }
 286         }
 287
 288 }
 289
 290 # Finds all files in the srcdir, and the underlaydirs.
 291 # Returns the files, and their corresponding pages.
 292 #
 293 # When run in only_underlay mode, adds only the underlay files to
 294 # the files and pages passed in.
 295 sub find_src_files (;$$$) {
 296         my $only_underlay=shift;
 297         my @files;
 298         if (defined $_[0]) {
 299                 @files=@{shift()};
 300         }
 301         my %pages;
 302         if (defined $_[0]) {
 303                 %pages=%{shift()};
 304         }
 305
 306         eval q{use File::Find};
 307         error($@) if $@;
 308
 309         eval q{use Cwd};
 310         die $@ if $@;
 311         my $origdir=getcwd();
 312         my $abssrcdir=Cwd::abs_path($config{srcdir});
 313
 314         @IkiWiki::underlayfiles=();
 315
 316         my ($page, $underlay);
 317         my $helper=sub {
 318                 my $file=decode_utf8($_);
 319
 320                 return if -l $file || -d _;
 321                 $file=~s/^\.\///;
 322                 return if ! length $file;
 323                 $page = pagename($file);
 324                 if (! exists $pagesources{$page} &&
 325                     file_pruned($file)) {
 326                         $File::Find::prune=1;
 327                         return;
 328                 }
 329
 330                 my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
 331                 if (! defined $f) {
 332                         warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
 333                         return;
 334                 }
 335
 336                 if ($underlay) {
 337                         # avoid underlaydir override attacks; see security.mdwn
 338                         if (! -l "$abssrcdir/$f" && ! -e _) {
 339                                 if (! $pages{$page}) {
 340                                         push @files, $f;
 341                                         push @IkiWiki::underlayfiles, $f;
 342                                         $pages{$page}=1;
 343                                 }
 344                         }
 345                 }
 346                 else {
 347                         push @files, $f;
 348                         if ($pages{$page}) {
 349                                 debug(sprintf(gettext("%s has multiple possible source pages"), $page));
 350                         }
 351                         $pages{$page}=1;
 352                 }
 353         };
 354
 355         unless ($only_underlay) {
 356                 chdir($config{srcdir}) || die "chdir $config{srcdir}: $!";
 357                 find({
 358                         no_chdir => 1,
 359                         wanted => $helper,
 360                 }, '.');
 361                 chdir($origdir) || die "chdir $origdir: $!";
 362         }
 363
 364         $underlay=1;
 365         foreach (@{$config{underlaydirs}}, $config{underlaydir}) {
 366                 if (chdir($_)) {
 367                         find({
 368                                 no_chdir => 1,
 369                                 wanted => $helper,
 370                         }, '.');
 371                         chdir($origdir) || die "chdir: $!";
 372                 }
 373         };
 374
 375         return \@files, \%pages;
 376 }
 377
 378 # Given a hash of files that have changed, and a hash of files that were
 379 # deleted, should return the same results as find_src_files, with the same
 380 # sanity checks. But a lot faster!
 381 sub process_changed_files ($$) {
 382         my $changed_raw=shift;
 383         my $deleted_raw=shift;
 384
 385         my @files;
 386         my %pages;
 387
 388         foreach my $file (keys %$changed_raw) {
 389                 my $page = pagename($file);
 390                 next if ! exists $pagesources{$page} && file_pruned($file);
 391                 my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
 392                 if (! defined $f) {
 393                         warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
 394                         next;
 395                 }
 396                 push @files, $f;
 397                 if ($pages{$page}) {
 398                         debug(sprintf(gettext("%s has multiple possible source pages"), $page));
 399                 }
 400                 $pages{$page}=1;
 401         }
 402
 403         # So far, we only have the changed files. Now add in all the old
 404         # files that were not changed or deleted, excluding ones that came
 405         # from the underlay.
 406         my %old_underlay;
 407         foreach my $f (@IkiWiki::underlayfiles) {
 408                 $old_underlay{$f}=1;
 409         }
 410         foreach my $page (keys %pagesources) {
 411                 my $f=$pagesources{$page};
 412                 unless ($old_underlay{$f} || exists $pages{$page} || exists $deleted_raw->{$f}) {
 413                         $pages{$page}=1;
 414                         push @files, $f;
 415                 }
 416         }
 417
 418         # add in the underlay
 419         find_src_files(1, \@files, \%pages);
 420 }
 421
 422 sub find_new_files ($) {
 423         my $files=shift;
 424         my @new;
 425         my @internal_new;
 426
 427         my $times_noted;
 428
 429         foreach my $file (@$files) {
 430                 my $page=pagename($file);
 431
 432                 if ($config{rcs} && $config{gettime} &&
 433                     -e "$config{srcdir}/$file") {
 434                         if (! $times_noted) {
 435                                 debug(sprintf(gettext("querying %s for file creation and modification times.."), $config{rcs}));
 436                                 $times_noted=1;
 437                         }
 438
 439                         eval {
 440                                 my $ctime=rcs_getctime($file);
 441                                 if ($ctime > 0) {
 442                                         $pagectime{$page}=$ctime;
 443                                 }
 444                         };
 445                         if ($@) {
 446                                 print STDERR $@;
 447                         }
 448                         my $mtime;
 449                         eval {
 450                                 $mtime=rcs_getmtime($file);
 451                         };
 452                         if ($@) {
 453                                 print STDERR $@;
 454                         }
 455                         elsif ($mtime > 0) {
 456                                 utime($mtime, $mtime, "$config{srcdir}/$file");
 457                         }
 458                 }
 459
 460                 if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
 461                         # the page has changed its type
 462                         $forcerebuild{$page}=1;
 463                 }
 464                 $pagesources{$page}=$file;
 465                 if (! $pagemtime{$page}) {
 466                         if (isinternal($page)) {
 467                                 push @internal_new, $file;
 468                         }
 469                         else {
 470                                 push @new, $file;
 471                         }
 472                         $pagecase{lc $page}=$page;
 473                         if (! exists $pagectime{$page}) {
 474                                 $pagectime{$page}=(srcfile_stat($file))[10];
 475                         }
 476                 }
 477         }
 478
 479         return \@new, \@internal_new;
 480 }
 481
 482 sub find_del_files ($) {
 483         my $pages=shift;
 484         my @del;
 485         my @internal_del;
 486
 487         foreach my $page (keys %pagesources) {
 488                 if (! $pages->{$page}) {
 489                         if (isinternal($page)) {
 490                                 push @internal_del, $pagesources{$page};
 491                         }
 492                         else {
 493                                 push @del, $pagesources{$page};
 494                         }
 495                         $links{$page}=[];
 496                         delete $typedlinks{$page};
 497                         $renderedfiles{$page}=[];
 498                         $pagemtime{$page}=0;
 499                 }
 500         }
 501
 502         return \@del, \@internal_del;
 503 }
 504
 505 sub remove_del (@) {
 506         foreach my $file (@_) {
 507                 my $page=pagename($file);
 508                 if (! isinternal($page)) {
 509                         debug(sprintf(gettext("removing obsolete %s"), $page));
 510                 }
 511
 512                 foreach my $old (@{$oldrenderedfiles{$page}}) {
 513                         prune($config{destdir}."/".$old, $config{destdir});
 514                 }
 515
 516                 foreach my $source (keys %destsources) {
 517                         if ($destsources{$source} eq $page) {
 518                                 delete $destsources{$source};
 519                         }
 520                 }
 521
 522                 delete $pagecase{lc $page};
 523                 $delpagesources{$page}=$pagesources{$page};
 524                 delete $pagesources{$page};
 525         }
 526 }
 527
 528 sub find_changed ($) {
 529         my $files=shift;
 530         my @changed;
 531         my @internal_changed;
 532         foreach my $file (@$files) {
 533                 my $page=pagename($file);
 534                 my ($srcfile, @stat)=srcfile_stat($file);
 535                 if (! exists $pagemtime{$page} ||
 536                     $stat[9] > $pagemtime{$page} ||
 537                     $forcerebuild{$page}) {
 538                         $pagemtime{$page}=$stat[9];
 539
 540                         if (isinternal($page)) {
 541                                 my $content = readfile($srcfile);
 542
 543                                 # Preprocess internal page in scan-only mode.
 544                                 preprocess($page, $page, $content, 1);
 545
 546                                 run_hooks(scan => sub {
 547                                         shift->(
 548                                                 page => $page,
 549                                                 content => $content,
 550                                         );
 551                                 });
 552
 553                                 push @internal_changed, $file;
 554                         }
 555                         else {
 556                                 push @changed, $file;
 557                         }
 558                 }
 559         }
 560         return \@changed, \@internal_changed;
 561 }
 562
 563 sub calculate_old_links ($$) {
 564         my ($changed, $del)=@_;
 565         my %oldlink_targets;
 566         foreach my $file (@$changed, @$del) {
 567                 my $page=pagename($file);
 568                 if (exists $oldlinks{$page}) {
 569                         foreach my $l (@{$oldlinks{$page}}) {
 570                                 $oldlink_targets{$page}{$l}=bestlink($page, $l);
 571                         }
 572                 }
 573         }
 574         return \%oldlink_targets;
 575 }
 576
 577 sub derender_internal ($) {
 578         my $file=shift;
 579         my $page=pagename($file);
 580         delete $depends{$page};
 581         delete $depends_simple{$page};
 582         foreach my $old (@{$renderedfiles{$page}}) {
 583                 delete $destsources{$old};
 584         }
 585         $renderedfiles{$page}=[];
 586 }
 587
 588 sub render_linkers ($) {
 589         my $f=shift;
 590         my $p=pagename($f);
 591         foreach my $page (keys %{$backlinks{$p}}) {
 592                 my $file=$pagesources{$page};
 593                 render($file, sprintf(gettext("building %s, which links to %s"), $file, $p));
 594         }
 595 }
 596
 597 sub remove_unrendered () {
 598         foreach my $src (keys %rendered) {
 599                 my $page=pagename($src);
 600                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 601                         if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
 602                                 debug(sprintf(gettext("removing %s, no longer built by %s"), $file, $page));
 603                                 prune($config{destdir}."/".$file, $config{destdir});
 604                         }
 605                 }
 606         }
 607 }
 608
 609 sub link_types_changed ($$) {
 610         # each is of the form { type => { link => 1 } }
 611         my $new = shift;
 612         my $old = shift;
 613
 614         return 0 if !defined $new && !defined $old;
 615         return 1 if (!defined $new && %$old) || (!defined $old && %$new);
 616
 617         while (my ($type, $links) = each %$new) {
 618                 foreach my $link (keys %$links) {
 619                         return 1 unless exists $old->{$type}{$link};
 620                 }
 621         }
 622
 623         while (my ($type, $links) = each %$old) {
 624                 foreach my $link (keys %$links) {
 625                         return 1 unless exists $new->{$type}{$link};
 626                 }
 627         }
 628
 629         return 0;
 630 }
 631
 632 sub calculate_changed_links ($$$) {
 633         my ($changed, $del, $oldlink_targets)=@_;
 634
 635         my (%backlinkchanged, %linkchangers);
 636
 637         foreach my $file (@$changed, @$del) {
 638                 my $page=pagename($file);
 639
 640                 if (exists $links{$page}) {
 641                         foreach my $l (@{$links{$page}}) {
 642                                 my $target=bestlink($page, $l);
 643                                 if (! exists $oldlink_targets->{$page}{$l} ||
 644                                     $target ne $oldlink_targets->{$page}{$l}) {
 645                                         $backlinkchanged{$target}=1;
 646                                         $linkchangers{lc($page)}=1;
 647                                 }
 648                                 delete $oldlink_targets->{$page}{$l};
 649                         }
 650                 }
 651                 if (exists $oldlink_targets->{$page} &&
 652                     %{$oldlink_targets->{$page}}) {
 653                         foreach my $target (values %{$oldlink_targets->{$page}}) {
 654                                 $backlinkchanged{$target}=1;
 655                         }
 656                         $linkchangers{lc($page)}=1;
 657                 }
 658
 659                 # we currently assume that changing the type of a link doesn't
 660                 # change backlinks
 661                 if (!exists $linkchangers{lc($page)}) {
 662                         if (link_types_changed($typedlinks{$page}, $oldtypedlinks{$page})) {
 663                                 $linkchangers{lc($page)}=1;
 664                         }
 665                 }
 666         }
 667
 668         return \%backlinkchanged, \%linkchangers;
 669 }
 670
 671 sub render_dependent ($$$$$$$) {
 672         my ($files, $new, $internal_new, $del, $internal_del,
 673                 $internal_changed, $linkchangers)=@_;
 674
 675         my @changed=(keys %rendered, @$del);
 676         my @exists_changed=(@$new, @$del);
 677
 678         my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
 679         my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;
 680
 681         foreach my $p ("templates/page.tmpl", keys %{$depends_simple{""}}) {
 682                 if ($rendered{$p} || grep { $_ eq $p } @$del) {
 683                         foreach my $f (@$files) {
 684                                 next if $rendered{$f};
 685                                 render($f, sprintf(gettext("building %s, which depends on %s"), $f, $p));
 686                         }
 687                         return 0;
 688                 }
 689         }
 690
 691         foreach my $f (@$files) {
 692                 next if $rendered{$f};
 693                 my $p=pagename($f);
 694                 my $reason = undef;
 695
 696                 if (exists $depends_simple{$p} && ! defined $reason) {
 697                         foreach my $d (keys %{$depends_simple{$p}}) {
 698                                 if (($depends_simple{$p}{$d} & $IkiWiki::DEPEND_CONTENT &&
 699                                      $lc_changed{$d})
 700                                     ||
 701                                     ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_PRESENCE &&
 702                                      $lc_exists_changed{$d})
 703                                     ||
 704                                     ($depends_simple{$p}{$d} & $IkiWiki::DEPEND_LINKS &&
 705                                      $linkchangers->{$d})
 706                                 ) {
 707                                         $reason = $d;
 708                                         last;
 709                                 }
 710                         }
 711                 }
 712
 713                 if (exists $depends{$p} && ! defined $reason) {
 714                         foreach my $dep (keys %{$depends{$p}}) {
 715                                 my $sub=pagespec_translate($dep);
 716                                 next unless defined $sub;
 717
 718                                 # only consider internal files
 719                                 # if the page explicitly depends
 720                                 # on such files
 721                                 my $internal_dep=$dep =~ /(?:internal|comment|comment_pending)\(/;
 722
 723                                 my $in=sub {
 724                                         my $list=shift;
 725                                         my $type=shift;
 726                                         foreach my $file (@$list) {
 727                                                 next if $file eq $f;
 728                                                 my $page=pagename($file);
 729                                                 if ($sub->($page, location => $p)) {
 730                                                         if ($type == $IkiWiki::DEPEND_LINKS) {
 731                                                                 next unless $linkchangers->{lc($page)};
 732                                                         }
 733                                                         $reason=$page;
 734                                                         return 1;
 735                                                 }
 736                                         }
 737                                         return undef;
 738                                 };
 739
 740                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_CONTENT) {
 741                                         last if $in->(\@changed, $IkiWiki::DEPEND_CONTENT);
 742                                         last if $internal_dep && (
 743                                                 $in->($internal_new, $IkiWiki::DEPEND_CONTENT) ||
 744                                                 $in->($internal_del, $IkiWiki::DEPEND_CONTENT) ||
 745                                                 $in->($internal_changed, $IkiWiki::DEPEND_CONTENT)
 746                                         );
 747                                 }
 748                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_PRESENCE) {
 749                                         last if $in->(\@exists_changed, $IkiWiki::DEPEND_PRESENCE);
 750                                         last if $internal_dep && (
 751                                                 $in->($internal_new, $IkiWiki::DEPEND_PRESENCE) ||
 752                                                 $in->($internal_del, $IkiWiki::DEPEND_PRESENCE)
 753                                         );
 754                                 }
 755                                 if ($depends{$p}{$dep} & $IkiWiki::DEPEND_LINKS) {
 756                                         last if $in->(\@changed, $IkiWiki::DEPEND_LINKS);
 757                                         last if $internal_dep && (
 758                                                 $in->($internal_new, $IkiWiki::DEPEND_LINKS) ||
 759                                                 $in->($internal_del, $IkiWiki::DEPEND_LINKS) ||
 760                                                 $in->($internal_changed, $IkiWiki::DEPEND_LINKS)
 761                                         );
 762                                 }
 763                         }
 764                 }
 765
 766                 if (defined $reason) {
 767                         render($f, sprintf(gettext("building %s, which depends on %s"), $f, $reason));
 768                         return 1;
 769                 }
 770         }
 771
 772         return 0;
 773 }
 774
 775 sub render_backlinks ($) {
 776         my $backlinkchanged=shift;
 777         foreach my $link (keys %$backlinkchanged) {
 778                 my $linkfile=$pagesources{$link};
 779                 if (defined $linkfile) {
 780                         render($linkfile, sprintf(gettext("building %s, to update its backlinks"), $linkfile));
 781                 }
 782         }
 783 }
 784
 785 sub gen_autofile ($$$) {
 786         my $autofile=shift;
 787         my $pages=shift;
 788         my $del=shift;
 789
 790         if (file_pruned($autofile)) {
 791                 return;
 792         }
 793
 794         my ($file)="$config{srcdir}/$autofile" =~ /$config{wiki_file_regexp}/; # untaint
 795         if (! defined $file) {
 796                 return;
 797         }
 798
 799         # Remember autofiles that were tried, and never try them again later.
 800         if (exists $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}) {
 801                 return;
 802         }
 803         $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}=1;
 804
 805         if (srcfile($autofile, 1) || file_pruned($autofile)) {
 806                 return;
 807         }
 808
 809         if (-l $file || -d _ || -e _) {
 810                 return;
 811         }
 812
 813         my $page = pagename($file);
 814         if ($pages->{$page}) {
 815                 return;
 816         }
 817
 818         if (grep { $_ eq $autofile } @$del) {
 819                 return;
 820         }
 821
 822         $autofiles{$autofile}{generator}->();
 823         $pages->{$page}=1;
 824         return 1;
 825 }
 826
 827 sub refresh () {
 828         srcdir_check();
 829         run_hooks(refresh => sub { shift->() });
 830         my ($files, $pages, $new, $internal_new, $del, $internal_del, $changed, $internal_changed);
 831         my $want_find_changes=$config{only_committed_changes} &&
 832                 exists $IkiWiki::hooks{rcs}{rcs_find_changes} &&
 833                 exists $IkiWiki::hooks{rcs}{rcs_get_current_rev};
 834         if (! $config{rebuild} && $want_find_changes && defined $IkiWiki::lastrev && length $IkiWiki::lastrev) {
 835                 my ($changed_raw, $del_raw);
 836                 ($changed_raw, $del_raw, $IkiWiki::lastrev) = $IkiWiki::hooks{rcs}{rcs_find_changes}{call}->($IkiWiki::lastrev);
 837                 ($files, $pages)=process_changed_files($changed_raw, $del_raw);
 838         }
 839         else {
 840                 ($files, $pages)=find_src_files();
 841         }
 842         if ($want_find_changes) {
 843                 if (! defined($IkiWiki::lastrev) || ! length $IkiWiki::lastrev) {
 844                         $IkiWiki::lastrev=$IkiWiki::hooks{rcs}{rcs_get_current_rev}{call}->();
 845                 }
 846         }
 847         ($new, $internal_new)=find_new_files($files);
 848         ($del, $internal_del)=find_del_files($pages);
 849         ($changed, $internal_changed)=find_changed($files);
 850         my %existingfiles;
 851         run_hooks(needsbuild => sub {
 852                 my $ret=shift->($changed, [@$del, @$internal_del]);
 853                 if (ref $ret eq 'ARRAY' && $ret != $changed) {
 854                         if (! %existingfiles) {
 855                                 foreach my $f (@$files) {
 856                                         $existingfiles{$f}=1;
 857                                 }
 858                         }
 859                         @$changed=grep $existingfiles{$_}, @$ret;
 860                 }
 861         });
 862         my $oldlink_targets=calculate_old_links($changed, $del);
 863
 864         foreach my $file (@$changed) {
 865                 scan($file);
 866         }
 867
 868         foreach my $autofile (keys %autofiles) {
 869                 if (gen_autofile($autofile, $pages, $del)) {
 870                         push @{$files}, $autofile;
 871                         push @{$new}, $autofile if find_new_files([$autofile]);
 872                         push @{$changed}, $autofile if find_changed([$autofile]);
 873
 874                         scan($autofile);
 875                 }
 876         }
 877
 878         calculate_links();
 879
 880         remove_del(@$del, @$internal_del);
 881
 882         foreach my $file (@$changed) {
 883                 render($file, sprintf(gettext("building %s"), $file));
 884         }
 885         foreach my $file (@$internal_new, @$internal_del, @$internal_changed) {
 886                 derender_internal($file);
 887         }
 888
 889         run_hooks(build_affected => sub {
 890                 my %affected = shift->();
 891                 while (my ($page, $message) = each %affected) {
 892                         next unless exists $pagesources{$page};
 893                         render($pagesources{$page}, $message);
 894                 }
 895         });
 896
 897         my ($backlinkchanged, $linkchangers)=calculate_changed_links($changed,
 898                 $del, $oldlink_targets);
 899
 900         foreach my $file (@$new, @$del) {
 901                 render_linkers($file);
 902         }
 903
 904         if (@$changed || @$internal_changed ||
 905             @$del || @$internal_del || @$internal_new) {
 906                 1 while render_dependent($files, $new, $internal_new,
 907                         $del, $internal_del, $internal_changed,
 908                         $linkchangers);
 909         }
 910
 911         render_backlinks($backlinkchanged);
 912         remove_unrendered();
 913
 914         if (@$del || @$internal_del) {
 915                 run_hooks(delete => sub { shift->(@$del, @$internal_del) });
 916         }
 917         if (%rendered) {
 918                 run_hooks(rendered => sub { shift->(keys %rendered) });
 919                 run_hooks(change => sub { shift->(keys %rendered) }); # back-compat
 920         }
 921         my %all_changed = map { $_ => 1 }
 922                 @$new, @$changed, @$del,
 923                 @$internal_new, @$internal_changed, @$internal_del;
 924         run_hooks(changes => sub { shift->(keys %all_changed) });
 925 }
 926
 927 sub clean_rendered {
 928         lockwiki();
 929         loadindex();
 930         remove_unrendered();
 931         foreach my $page (keys %oldrenderedfiles) {
 932                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 933                         prune($config{destdir}."/".$file, $config{destdir});
 934                 }
 935         }
 936 }
 937
 938 sub commandline_render () {
 939         lockwiki();
 940         loadindex();
 941         unlockwiki();
 942
 943         my $srcfile=possibly_foolish_untaint($config{render});
 944         my $file=$srcfile;
 945         $file=~s/\Q$config{srcdir}\E\/?//;
 946
 947         my $type=pagetype($file);
 948         die sprintf(gettext("ikiwiki: cannot build %s"), $srcfile)."\n" unless defined $type;
 949         my $content=readfile($srcfile);
 950         my $page=pagename($file);
 951         $pagesources{$page}=$file;
 952         $content=filter($page, $page, $content);
 953         $content=preprocess($page, $page, $content);
 954         $content=linkify($page, $page, $content);
 955         $content=htmlize($page, $page, $type, $content);
 956         $pagemtime{$page}=(stat($srcfile))[9];
 957         $pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};
 958
 959         print genpage($page, $content);
 960         exit 0;
 961 }
 962
 963 1