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