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                 $template->param(editurl => cgiurl(do => "edit", page => pagetitle($page, 1)));
  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, $file, 1);
 180         }
 181 } #}}}
 182
 183 sub render ($) { #{{{
 184         my $file=shift;
 185
 186         my $type=pagetype($file);
 187         my $srcfile=srcfile($file);
 188         if (defined $type) {
 189                 my $page=pagename($file);
 190                 delete $depends{$page};
 191                 will_render($page, htmlpage($page), 1);
 192                 return if $type=~/^_/;
 193
 194                 my $content=htmlize($page, $page, $type,
 195                         linkify($page, $page,
 196                         preprocess($page, $page,
 197                         filter($page, $page,
 198                         readfile($srcfile)))));
 199
 200                 my $output=htmlpage($page);
 201                 writefile($output, $config{destdir}, genpage($page, $content));
 202         }
 203         else {
 204                 delete $depends{$file};
 205                 will_render($file, $file, 1);
 206
 207                 if ($config{hardlink}) {
 208                         prep_writefile($file, $config{destdir});
 209                         unlink($config{destdir}."/".$file);
 210                         if (link($srcfile, $config{destdir}."/".$file)) {
 211                                 return;
 212                         }
 213                         # if hardlink fails, fall back to copying
 214                 }
 215
 216                 my $srcfd=readfile($srcfile, 1, 1);
 217                 writefile($file, $config{destdir}, undef, 1, sub {
 218                         my $destfd=shift;
 219                         my $cleanup=shift;
 220
 221                         my $blksize = 16384;
 222                         my ($len, $buf, $written);
 223                         while ($len = sysread $srcfd, $buf, $blksize) {
 224                                 if (! defined $len) {
 225                                         next if $! =~ /^Interrupted/;
 226                                         error("failed to read $srcfile: $!", $cleanup);
 227                                 }
 228                                 my $offset = 0;
 229                                 while ($len) {
 230                                         defined($written = syswrite $destfd, $buf, $len, $offset)
 231                                                 or error("failed to write $file: $!", $cleanup);
 232                                         $len -= $written;
 233                                         $offset += $written;
 234                                 }
 235                         }
 236                 });
 237         }
 238 } #}}}
 239
 240 sub prune ($) { #{{{
 241         my $file=shift;
 242
 243         unlink($file);
 244         my $dir=dirname($file);
 245         while (rmdir($dir)) {
 246                 $dir=dirname($dir);
 247         }
 248 } #}}}
 249
 250 sub refresh () { #{{{
 251         # security check, avoid following symlinks in the srcdir path
 252         my $test=$config{srcdir};
 253         while (length $test) {
 254                 if (-l $test) {
 255                         error("symlink found in srcdir path ($test)");
 256                 }
 257                 unless ($test=~s/\/+$//) {
 258                         $test=dirname($test);
 259                 }
 260         }
 261
 262         run_hooks(refresh => sub { shift->() });
 263
 264         # find existing pages
 265         my %exists;
 266         my @files;
 267         eval q{use File::Find};
 268         error($@) if $@;
 269         find({
 270                 no_chdir => 1,
 271                 wanted => sub {
 272                         $_=decode_utf8($_);
 273                         if (file_pruned($_, $config{srcdir})) {
 274                                 $File::Find::prune=1;
 275                         }
 276                         elsif (! -l $_ && ! -d _) {
 277                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 278                                 if (! defined $f) {
 279                                         warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 280                                 }
 281                                 else {
 282                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 283                                         push @files, $f;
 284                                         $exists{pagename($f)}=1;
 285                                 }
 286                         }
 287                 },
 288         }, $config{srcdir});
 289         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 290                 find({
 291                         no_chdir => 1,
 292                         wanted => sub {
 293                                 $_=decode_utf8($_);
 294                                 if (file_pruned($_, $dir)) {
 295                                         $File::Find::prune=1;
 296                                 }
 297                                 elsif (! -l $_ && ! -d _) {
 298                                         my ($f)=/$config{wiki_file_regexp}/; # untaint
 299                                         if (! defined $f) {
 300                                                 warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 301                                         }
 302                                         else {
 303                                                 $f=~s/^\Q$dir\E\/?//;
 304                                                 # avoid underlaydir
 305                                                 # override attacks; see
 306                                                 # security.mdwn
 307                                                 if (! -l "$config{srcdir}/$f" &&
 308                                                     ! -e _) {
 309                                                         my $page=pagename($f);
 310                                                         if (! $exists{$page}) {
 311                                                                 push @files, $f;
 312                                                                 $exists{$page}=1;
 313                                                         }
 314                                                 }
 315                                         }
 316                                 }
 317                         },
 318                 }, $dir);
 319         };
 320
 321         my (%rendered, @add, @del, @internal);
 322         # check for added or removed pages
 323         foreach my $file (@files) {
 324                 my $page=pagename($file);
 325                 $pagesources{$page}=$file;
 326                 if (! $pagemtime{$page}) {
 327                         if (isinternal($page)) {
 328                                 push @internal, $file;
 329                         }
 330                         else {
 331                                 push @add, $file;
 332                                 if ($config{getctime} && -e "$config{srcdir}/$file") {
 333                                         eval {
 334                                                 my $time=rcs_getctime("$config{srcdir}/$file");
 335                                                 $pagectime{$page}=$time;
 336                                         };
 337                                         if ($@) {
 338                                                 print STDERR $@;
 339                                         }
 340                                 }
 341                         }
 342                         $pagecase{lc $page}=$page;
 343                         if (! exists $pagectime{$page}) {
 344                                 $pagectime{$page}=(srcfile_stat($file))[10];
 345                         }
 346                 }
 347         }
 348         foreach my $page (keys %pagemtime) {
 349                 if (! $exists{$page}) {
 350                         if (isinternal($page)) {
 351                                 push @internal, $pagesources{$page};
 352                         }
 353                         else {
 354                                 debug(sprintf(gettext("removing old page %s"), $page));
 355                                 push @del, $pagesources{$page};
 356                         }
 357                         $links{$page}=[];
 358                         $renderedfiles{$page}=[];
 359                         $pagemtime{$page}=0;
 360                         prune($config{destdir}."/".$_)
 361                                 foreach @{$oldrenderedfiles{$page}};
 362                         delete $pagesources{$page};
 363                         foreach (keys %destsources) {
 364                                 if ($destsources{$_} eq $page) {
 365                                         delete $destsources{$_};
 366                                 }
 367                         }
 368                 }
 369         }
 370
 371         # find changed and new files
 372         my @needsbuild;
 373         foreach my $file (@files) {
 374                 my $page=pagename($file);
 375                 my ($srcfile, @stat)=srcfile_stat($file);
 376                 if (! exists $pagemtime{$page} ||
 377                     $stat[9] > $pagemtime{$page} ||
 378                     $forcerebuild{$page}) {
 379                         $pagemtime{$page}=$stat[9];
 380                         if (isinternal($page)) {
 381                                 push @internal, $file;
 382                                 # Preprocess internal page in scan-only mode.
 383                                 preprocess($page, $page, readfile($srcfile), 1);
 384                         }
 385                         else {
 386                                 push @needsbuild, $file;
 387                         }
 388                 }
 389         }
 390         run_hooks(needsbuild => sub { shift->(\@needsbuild) });
 391
 392         # scan and render files
 393         foreach my $file (@needsbuild) {
 394                 debug(sprintf(gettext("scanning %s"), $file));
 395                 scan($file);
 396         }
 397         calculate_backlinks();
 398         foreach my $file (@needsbuild) {
 399                 debug(sprintf(gettext("rendering %s"), $file));
 400                 render($file);
 401                 $rendered{$file}=1;
 402         }
 403         foreach my $file (@internal) {
 404                 # internal pages are not rendered
 405                 my $page=pagename($file);
 406                 delete $depends{$page};
 407                 foreach my $old (@{$renderedfiles{$page}}) {
 408                         delete $destsources{$old};
 409                 }
 410                 $renderedfiles{$page}=[];
 411         }
 412
 413         # rebuild pages that link to added or removed pages
 414         if (@add || @del) {
 415                 foreach my $f (@add, @del) {
 416                         my $p=pagename($f);
 417                         foreach my $page (keys %{$backlinks{$p}}) {
 418                                 my $file=$pagesources{$page};
 419                                 next if $rendered{$file};
 420                                 debug(sprintf(gettext("rendering %s, which links to %s"), $file, $p));
 421                                 render($file);
 422                                 $rendered{$file}=1;
 423                         }
 424                 }
 425         }
 426
 427         if (%rendered || @del || @internal) {
 428                 my @changed=(keys %rendered, @del);
 429
 430                 # rebuild dependant pages
 431                 foreach my $f (@files) {
 432                         next if $rendered{$f};
 433                         my $p=pagename($f);
 434                         if (exists $depends{$p}) {
 435                                 # only consider internal files
 436                                 # if the page explicitly depends on such files
 437                                 foreach my $file (@changed, $depends{$p}=~/internal\(/ ? @internal : ()) {
 438                                         next if $f eq $file;
 439                                         my $page=pagename($file);
 440                                         if (pagespec_match($page, $depends{$p}, location => $p)) {
 441                                                 debug(sprintf(gettext("rendering %s, which depends on %s"), $f, $page));
 442                                                 render($f);
 443                                                 $rendered{$f}=1;
 444                                                 last;
 445                                         }
 446                                 }
 447                         }
 448                 }
 449
 450                 # handle backlinks; if a page has added/removed links,
 451                 # update the pages it links to
 452                 my %linkchanged;
 453                 foreach my $file (@changed) {
 454                         my $page=pagename($file);
 455
 456                         if (exists $links{$page}) {
 457                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 458                                         if (length $link &&
 459                                             (! exists $oldlinks{$page} ||
 460                                              ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
 461                                                 $linkchanged{$link}=1;
 462                                         }
 463                                 }
 464                         }
 465                         if (exists $oldlinks{$page}) {
 466                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 467                                         if (length $link &&
 468                                             (! exists $links{$page} ||
 469                                              ! grep { bestlink($page, $_) eq $link } @{$links{$page}})) {
 470                                                 $linkchanged{$link}=1;
 471                                         }
 472                                 }
 473                         }
 474                 }
 475
 476                 foreach my $link (keys %linkchanged) {
 477                         my $linkfile=$pagesources{$link};
 478                         if (defined $linkfile) {
 479                                 next if $rendered{$linkfile};
 480                                 debug(sprintf(gettext("rendering %s, to update its backlinks"), $linkfile));
 481                                 render($linkfile);
 482                                 $rendered{$linkfile}=1;
 483                         }
 484                 }
 485         }
 486
 487         # remove no longer rendered files
 488         foreach my $src (keys %rendered) {
 489                 my $page=pagename($src);
 490                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 491                         if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
 492                                 debug(sprintf(gettext("removing %s, no longer rendered by %s"), $file, $page));
 493                                 prune($config{destdir}."/".$file);
 494                         }
 495                 }
 496         }
 497
 498         if (@del) {
 499                 run_hooks(delete => sub { shift->(@del) });
 500         }
 501         if (%rendered) {
 502                 run_hooks(change => sub { shift->(keys %rendered) });
 503         }
 504 } #}}}
 505
 506 sub commandline_render () { #{{{
 507         lockwiki();
 508         loadindex();
 509         unlockwiki();
 510
 511         my $srcfile=possibly_foolish_untaint($config{render});
 512         my $file=$srcfile;
 513         $file=~s/\Q$config{srcdir}\E\/?//;
 514
 515         my $type=pagetype($file);
 516         die sprintf(gettext("ikiwiki: cannot render %s"), $srcfile)."\n" unless defined $type;
 517         my $content=readfile($srcfile);
 518         my $page=pagename($file);
 519         $pagesources{$page}=$file;
 520         $content=filter($page, $page, $content);
 521         $content=preprocess($page, $page, $content);
 522         $content=linkify($page, $page, $content);
 523         $content=htmlize($page, $page, $type, $content);
 524         $pagemtime{$page}=(stat($srcfile))[9];
 525
 526         print genpage($page, $content);
 527         exit 0;
 528 } #}}}
 529
 530 1