IkiWiki/Render.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4
   5 use warnings;
   6 use strict;
   7 use IkiWiki;
   8 use Encode;
   9
  10 my %backlinks;
  11 my $backlinks_calculated=0;
  12
  13 sub calculate_backlinks () {
  14         return if $backlinks_calculated;
  15         %backlinks=();
  16         foreach my $page (keys %links) {
  17                 foreach my $link (@{$links{$page}}) {
  18                         my $bestlink=bestlink($page, $link);
  19                         if (length $bestlink && $bestlink ne $page) {
  20                                 $backlinks{$bestlink}{$page}=1;
  21                         }
  22                 }
  23         }
  24         $backlinks_calculated=1;
  25 }
  26
  27 sub backlinks ($) {
  28         my $page=shift;
  29
  30         calculate_backlinks();
  31
  32         my @links;
  33         foreach my $p (keys %{$backlinks{$page}}) {
  34                 my $href=urlto($p, $page);
  35
  36                 # Trim common dir prefixes from both pages.
  37                 my $p_trimmed=$p;
  38                 my $page_trimmed=$page;
  39                 my $dir;
  40                 1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
  41                         defined $dir &&
  42                         $p_trimmed=~s/^\Q$dir\E// &&
  43                         $page_trimmed=~s/^\Q$dir\E//;
  44
  45                 push @links, { url => $href, page => pagetitle($p_trimmed) };
  46         }
  47         return @links;
  48 }
  49
  50 sub genpage ($$) {
  51         my $page=shift;
  52         my $content=shift;
  53
  54         my $templatefile;
  55         run_hooks(templatefile => sub {
  56                 return if defined $templatefile;
  57                 my $file=shift->(page => $page);
  58                 if (defined $file && defined template_file($file)) {
  59                         $templatefile=$file;
  60                 }
  61         });
  62         my $template=template(defined $templatefile ? $templatefile : 'page.tmpl', blind_cache => 1);
  63         my $actions=0;
  64
  65         if (length $config{cgiurl}) {
  66                 $template->param(editurl => cgiurl(do => "edit", page => $page))
  67                         if IkiWiki->can("cgi_editpage");
  68                 $template->param(prefsurl => cgiurl(do => "prefs"))
  69                         if exists $hooks{auth};
  70                 $actions++;
  71         }
  72
  73         if (defined $config{historyurl} && length $config{historyurl}) {
  74                 my $u=$config{historyurl};
  75                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
  76                 $template->param(historyurl => $u);
  77                 $actions++;
  78         }
  79         if ($config{discussion}) {
  80                 my $discussionlink=lc(gettext("Discussion"));
  81                 if ($page !~ /.*\/\Q$discussionlink\E$/ &&
  82                    (length $config{cgiurl} ||
  83                     exists $links{$page."/".$discussionlink})) {
  84                         $template->param(discussionlink => htmllink($page, $page, gettext("Discussion"), noimageinline => 1, forcesubpage => 1));
  85                         $actions++;
  86                 }
  87         }
  88
  89         if ($actions) {
  90                 $template->param(have_actions => 1);
  91         }
  92
  93         my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
  94         my ($backlinks, $more_backlinks);
  95         if (@backlinks <= $config{numbacklinks} || ! $config{numbacklinks}) {
  96                 $backlinks=\@backlinks;
  97                 $more_backlinks=[];
  98         }
  99         else {
 100                 $backlinks=[@backlinks[0..$config{numbacklinks}-1]];
 101                 $more_backlinks=[@backlinks[$config{numbacklinks}..$#backlinks]];
 102         }
 103
 104         $template->param(
 105                 title => $page eq 'index'
 106                         ? $config{wikiname}
 107                         : pagetitle(basename($page)),
 108                 wikiname => $config{wikiname},
 109                 content => $content,
 110                 backlinks => $backlinks,
 111                 more_backlinks => $more_backlinks,
 112                 mtime => displaytime($pagemtime{$page}),
 113                 ctime => displaytime($pagectime{$page}),
 114                 baseurl => baseurl($page),
 115         );
 116
 117         run_hooks(pagetemplate => sub {
 118                 shift->(page => $page, destpage => $page, template => $template);
 119         });
 120
 121         $content=$template->output;
 122
 123         run_hooks(postscan => sub {
 124                 shift->(page => $page, content => $content);
 125         });
 126
 127         run_hooks(format => sub {
 128                 $content=shift->(
 129                         page => $page,
 130                         content => $content,
 131                 );
 132         });
 133
 134         return $content;
 135 }
 136
 137 sub scan ($) {
 138         my $file=shift;
 139
 140         my $type=pagetype($file);
 141         if (defined $type) {
 142                 my $srcfile=srcfile($file);
 143                 my $content=readfile($srcfile);
 144                 my $page=pagename($file);
 145                 will_render($page, htmlpage($page), 1);
 146
 147                 if ($config{discussion}) {
 148                         # Discussion links are a special case since they're
 149                         # not in the text of the page, but on its template.
 150                         $links{$page}=[ $page."/".lc(gettext("Discussion")) ];
 151                 }
 152                 else {
 153                         $links{$page}=[];
 154                 }
 155
 156                 run_hooks(scan => sub {
 157                         shift->(
 158                                 page => $page,
 159                                 content => $content,
 160                         );
 161                 });
 162
 163                 # Preprocess in scan-only mode.
 164                 preprocess($page, $page, $content, 1);
 165         }
 166         else {
 167                 will_render($file, $file, 1);
 168         }
 169 }
 170
 171 sub fast_file_copy (@) {
 172         my $srcfile=shift;
 173         my $destfile=shift;
 174         my $srcfd=shift;
 175         my $destfd=shift;
 176         my $cleanup=shift;
 177
 178         my $blksize = 16384;
 179         my ($len, $buf, $written);
 180         while ($len = sysread $srcfd, $buf, $blksize) {
 181                 if (! defined $len) {
 182                         next if $! =~ /^Interrupted/;
 183                         error("failed to read $srcfile: $!", $cleanup);
 184                 }
 185                 my $offset = 0;
 186                 while ($len) {
 187                         defined($written = syswrite $destfd, $buf, $len, $offset)
 188                                 or error("failed to write $destfile: $!", $cleanup);
 189                         $len -= $written;
 190                         $offset += $written;
 191                 }
 192         }
 193 }
 194
 195 sub render ($) {
 196         my $file=shift;
 197
 198         my $type=pagetype($file);
 199         my $srcfile=srcfile($file);
 200         if (defined $type) {
 201                 my $page=pagename($file);
 202                 delete $depends{$page};
 203                 will_render($page, htmlpage($page), 1);
 204                 return if $type=~/^_/;
 205
 206                 my $content=htmlize($page, $page, $type,
 207                         linkify($page, $page,
 208                         preprocess($page, $page,
 209                         filter($page, $page,
 210                         readfile($srcfile)))));
 211
 212                 my $output=htmlpage($page);
 213                 writefile($output, $config{destdir}, genpage($page, $content));
 214         }
 215         else {
 216                 delete $depends{$file};
 217                 will_render($file, $file, 1);
 218
 219                 if ($config{hardlink}) {
 220                         # only hardlink if owned by same user
 221                         my @stat=stat($srcfile);
 222                         if ($stat[4] == $>) {
 223                                 prep_writefile($file, $config{destdir});
 224                                 unlink($config{destdir}."/".$file);
 225                                 if (link($srcfile, $config{destdir}."/".$file)) {
 226                                         return;
 227                                 }
 228                         }
 229                         # if hardlink fails, fall back to copying
 230                 }
 231
 232                 my $srcfd=readfile($srcfile, 1, 1);
 233                 writefile($file, $config{destdir}, undef, 1, sub {
 234                         fast_file_copy($srcfile, $file, $srcfd, @_);
 235                 });
 236         }
 237 }
 238
 239 sub prune ($) {
 240         my $file=shift;
 241
 242         unlink($file);
 243         my $dir=dirname($file);
 244         while (rmdir($dir)) {
 245                 $dir=dirname($dir);
 246         }
 247 }
 248
 249 sub srcdir_check () {
 250         # security check, avoid following symlinks in the srcdir path by default
 251         my $test=$config{srcdir};
 252         while (length $test) {
 253                 if (-l $test && ! $config{allow_symlinks_before_srcdir}) {
 254                         error(sprintf(gettext("symlink found in srcdir path (%s) -- set allow_symlinks_before_srcdir to allow this"), $test));
 255                 }
 256                 unless ($test=~s/\/+$//) {
 257                         $test=dirname($test);
 258                 }
 259         }
 260
 261 }
 262
 263 sub find_src_files () {
 264         my (@files, %pages);
 265         eval q{use File::Find};
 266         error($@) if $@;
 267         find({
 268                 no_chdir => 1,
 269                 wanted => sub {
 270                         $_=decode_utf8($_);
 271                         if (file_pruned($_, $config{srcdir})) {
 272                                 $File::Find::prune=1;
 273                         }
 274                         elsif (! -l $_ && ! -d _) {
 275                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 276                                 if (! defined $f) {
 277                                         warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 278                                 }
 279                                 else {
 280                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 281                                         push @files, $f;
 282                                         my $pagename = pagename($f);
 283                                         if ($pages{$pagename}) {
 284                                                 debug(sprintf(gettext("%s has multiple possible source pages"), $pagename));
 285                                         }
 286                                         $pages{$pagename}=1;
 287                                 }
 288                         }
 289                 },
 290         }, $config{srcdir});
 291         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 292                 find({
 293                         no_chdir => 1,
 294                         wanted => sub {
 295                                 $_=decode_utf8($_);
 296                                 if (file_pruned($_, $dir)) {
 297                                         $File::Find::prune=1;
 298                                 }
 299                                 elsif (! -l $_ && ! -d _) {
 300                                         my ($f)=/$config{wiki_file_regexp}/; # untaint
 301                                         if (! defined $f) {
 302                                                 warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 303                                         }
 304                                         else {
 305                                                 $f=~s/^\Q$dir\E\/?//;
 306                                                 # avoid underlaydir
 307                                                 # override attacks; see
 308                                                 # security.mdwn
 309                                                 if (! -l "$config{srcdir}/$f" &&
 310                                                     ! -e _) {
 311                                                         my $page=pagename($f);
 312                                                         if (! $pages{$page}) {
 313                                                                 push @files, $f;
 314                                                                 $pages{$page}=1;
 315                                                         }
 316                                                 }
 317                                         }
 318                                 }
 319                         },
 320                 }, $dir);
 321         };
 322
 323         # Returns a list of all source files found, and a hash of
 324         # the corresponding page names.
 325         return \@files, \%pages;
 326 }
 327
 328 sub refresh () {
 329         srcdir_check();
 330         run_hooks(refresh => sub { shift->() });
 331         my ($files, $exists)=find_src_files();
 332
 333         my (%rendered, @add, @del, @internal);
 334         # check for added or removed pages
 335         foreach my $file (@$files) {
 336                 my $page=pagename($file);
 337                 if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
 338                         # the page has changed its type
 339                         $forcerebuild{$page}=1;
 340                 }
 341                 $pagesources{$page}=$file;
 342                 if (! $pagemtime{$page}) {
 343                         if (isinternal($page)) {
 344                                 push @internal, $file;
 345                         }
 346                         else {
 347                                 push @add, $file;
 348                                 if ($config{getctime} && -e "$config{srcdir}/$file") {
 349                                         eval {
 350                                                 my $time=rcs_getctime("$config{srcdir}/$file");
 351                                                 $pagectime{$page}=$time;
 352                                         };
 353                                         if ($@) {
 354                                                 print STDERR $@;
 355                                         }
 356                                 }
 357                         }
 358                         $pagecase{lc $page}=$page;
 359                         if (! exists $pagectime{$page}) {
 360                                 $pagectime{$page}=(srcfile_stat($file))[10];
 361                         }
 362                 }
 363         }
 364         foreach my $page (keys %pagemtime) {
 365                 if (! $exists->{$page}) {
 366                         if (isinternal($page)) {
 367                                 push @internal, $pagesources{$page};
 368                         }
 369                         else {
 370                                 debug(sprintf(gettext("removing old page %s"), $page));
 371                                 push @del, $pagesources{$page};
 372                         }
 373                         $links{$page}=[];
 374                         $renderedfiles{$page}=[];
 375                         $pagemtime{$page}=0;
 376                         prune($config{destdir}."/".$_)
 377                                 foreach @{$oldrenderedfiles{$page}};
 378                         delete $pagesources{$page};
 379                         foreach (keys %destsources) {
 380                                 if ($destsources{$_} eq $page) {
 381                                         delete $destsources{$_};
 382                                 }
 383                         }
 384                 }
 385         }
 386
 387         # find changed and new files
 388         my @needsbuild;
 389         foreach my $file (@$files) {
 390                 my $page=pagename($file);
 391                 my ($srcfile, @stat)=srcfile_stat($file);
 392                 if (! exists $pagemtime{$page} ||
 393                     $stat[9] > $pagemtime{$page} ||
 394                     $forcerebuild{$page}) {
 395                         $pagemtime{$page}=$stat[9];
 396                         if (isinternal($page)) {
 397                                 push @internal, $file;
 398                                 # Preprocess internal page in scan-only mode.
 399                                 preprocess($page, $page, readfile($srcfile), 1);
 400                         }
 401                         else {
 402                                 push @needsbuild, $file;
 403                         }
 404                 }
 405         }
 406         run_hooks(needsbuild => sub { shift->(\@needsbuild) });
 407
 408         # scan and render files
 409         foreach my $file (@needsbuild) {
 410                 debug(sprintf(gettext("scanning %s"), $file));
 411                 scan($file);
 412         }
 413         calculate_backlinks();
 414         foreach my $file (@needsbuild) {
 415                 debug(sprintf(gettext("rendering %s"), $file));
 416                 render($file);
 417                 $rendered{$file}=1;
 418         }
 419         foreach my $file (@internal) {
 420                 # internal pages are not rendered
 421                 my $page=pagename($file);
 422                 delete $depends{$page};
 423                 foreach my $old (@{$renderedfiles{$page}}) {
 424                         delete $destsources{$old};
 425                 }
 426                 $renderedfiles{$page}=[];
 427         }
 428
 429         # rebuild pages that link to added or removed pages
 430         if (@add || @del) {
 431                 foreach my $f (@add, @del) {
 432                         my $p=pagename($f);
 433                         foreach my $page (keys %{$backlinks{$p}}) {
 434                                 my $file=$pagesources{$page};
 435                                 next if $rendered{$file};
 436                                 debug(sprintf(gettext("rendering %s, which links to %s"), $file, $p));
 437                                 render($file);
 438                                 $rendered{$file}=1;
 439                         }
 440                 }
 441         }
 442
 443         if (%rendered || @del || @internal) {
 444                 my @changed=(keys %rendered, @del);
 445
 446                 # rebuild dependant pages
 447                 foreach my $f (@$files) {
 448                         next if $rendered{$f};
 449                         my $p=pagename($f);
 450                         if (exists $depends{$p}) {
 451                                 # only consider internal files
 452                                 # if the page explicitly depends on such files
 453                                 foreach my $file (@changed, $depends{$p}=~/internal\(/ ? @internal : ()) {
 454                                         next if $f eq $file;
 455                                         my $page=pagename($file);
 456                                         if (pagespec_match($page, $depends{$p}, location => $p)) {
 457                                                 debug(sprintf(gettext("rendering %s, which depends on %s"), $f, $page));
 458                                                 render($f);
 459                                                 $rendered{$f}=1;
 460                                                 last;
 461                                         }
 462                                 }
 463                         }
 464                 }
 465
 466                 # handle backlinks; if a page has added/removed links,
 467                 # update the pages it links to
 468                 my %linkchanged;
 469                 foreach my $file (@changed) {
 470                         my $page=pagename($file);
 471
 472                         if (exists $links{$page}) {
 473                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 474                                         if (length $link &&
 475                                             (! exists $oldlinks{$page} ||
 476                                              ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
 477                                                 $linkchanged{$link}=1;
 478                                         }
 479                                 }
 480                         }
 481                         if (exists $oldlinks{$page}) {
 482                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 483                                         if (length $link &&
 484                                             (! exists $links{$page} ||
 485                                              ! grep { bestlink($page, $_) eq $link } @{$links{$page}})) {
 486                                                 $linkchanged{$link}=1;
 487                                         }
 488                                 }
 489                         }
 490                 }
 491
 492                 foreach my $link (keys %linkchanged) {
 493                         my $linkfile=$pagesources{$link};
 494                         if (defined $linkfile) {
 495                                 next if $rendered{$linkfile};
 496                                 debug(sprintf(gettext("rendering %s, to update its backlinks"), $linkfile));
 497                                 render($linkfile);
 498                                 $rendered{$linkfile}=1;
 499                         }
 500                 }
 501         }
 502
 503         # remove no longer rendered files
 504         foreach my $src (keys %rendered) {
 505                 my $page=pagename($src);
 506                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 507                         if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
 508                                 debug(sprintf(gettext("removing %s, no longer rendered by %s"), $file, $page));
 509                                 prune($config{destdir}."/".$file);
 510                         }
 511                 }
 512         }
 513
 514         if (@del) {
 515                 run_hooks(delete => sub { shift->(@del) });
 516         }
 517         if (%rendered) {
 518                 run_hooks(change => sub { shift->(keys %rendered) });
 519         }
 520 }
 521
 522 sub commandline_render () {
 523         lockwiki();
 524         loadindex();
 525         unlockwiki();
 526
 527         my $srcfile=possibly_foolish_untaint($config{render});
 528         my $file=$srcfile;
 529         $file=~s/\Q$config{srcdir}\E\/?//;
 530
 531         my $type=pagetype($file);
 532         die sprintf(gettext("ikiwiki: cannot render %s"), $srcfile)."\n" unless defined $type;
 533         my $content=readfile($srcfile);
 534         my $page=pagename($file);
 535         $pagesources{$page}=$file;
 536         $content=filter($page, $page, $content);
 537         $content=preprocess($page, $page, $content);
 538         $content=linkify($page, $page, $content);
 539         $content=htmlize($page, $page, $type, $content);
 540         $pagemtime{$page}=(stat($srcfile))[9];
 541         $pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};
 542
 543         print genpage($page, $content);
 544         exit 0;
 545 }
 546
 547 1