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         return unless $backlinks{$page};
  34         foreach my $p (keys %{$backlinks{$page}}) {
  35                 my $href=abs2rel(htmlpage($p), dirname($page));
  36
  37                 # Trim common dir prefixes from both pages.
  38                 my $p_trimmed=$p;
  39                 my $page_trimmed=$page;
  40                 my $dir;
  41                 1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
  42                         defined $dir &&
  43                         $p_trimmed=~s/^\Q$dir\E// &&
  44                         $page_trimmed=~s/^\Q$dir\E//;
  45
  46                 push @links, { url => $href, page => pagetitle($p_trimmed) };
  47         }
  48
  49         return sort { $a->{page} cmp $b->{page} } @links;
  50 } #}}}
  51
  52 sub parentlinks ($) { #{{{
  53         my $page=shift;
  54
  55         my @ret;
  56         my $pagelink="";
  57         my $path="";
  58         my $skip=1;
  59         return if $page eq 'index'; # toplevel
  60         foreach my $dir (reverse split("/", $page)) {
  61                 if (! $skip) {
  62                         $path.="../";
  63                         unshift @ret, { url => $path.htmlpage($dir), page => pagetitle($dir) };
  64                 }
  65                 else {
  66                         $skip=0;
  67                 }
  68         }
  69         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
  70         return @ret;
  71 } #}}}
  72
  73 sub genpage ($$$) { #{{{
  74         my $page=shift;
  75         my $content=shift;
  76         my $mtime=shift;
  77
  78         my $template=template("page.tmpl", blind_cache => 1);
  79         my $actions=0;
  80
  81         if (length $config{cgiurl}) {
  82                 $template->param(editurl => cgiurl(do => "edit", page => $page));
  83                 $template->param(prefsurl => cgiurl(do => "prefs"));
  84                 if ($config{rcs}) {
  85                         $template->param(recentchangesurl => cgiurl(do => "recentchanges"));
  86                 }
  87                 $actions++;
  88         }
  89
  90         if (length $config{historyurl}) {
  91                 my $u=$config{historyurl};
  92                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
  93                 $template->param(historyurl => $u);
  94                 $actions++;
  95         }
  96         if ($config{discussion}) {
  97                 my $discussionlink=gettext("discussion");
  98                 if ($page !~ /.*\/\Q$discussionlink\E$/ &&
  99                    (length $config{cgiurl} ||
 100                     exists $links{$page."/".$discussionlink})) {
 101                         $template->param(discussionlink => htmllink($page, $page, gettext("Discussion"), noimageinline => 1, forcesubpage => 1));
 102                         $actions++;
 103                 }
 104         }
 105
 106         if ($actions) {
 107                 $template->param(have_actions => 1);
 108         }
 109
 110         $template->param(
 111                 title => $page eq 'index'
 112                         ? $config{wikiname}
 113                         : pagetitle(basename($page)),
 114                 wikiname => $config{wikiname},
 115                 parentlinks => [parentlinks($page)],
 116                 content => $content,
 117                 backlinks => [backlinks($page)],
 118                 mtime => displaytime($mtime),
 119                 baseurl => baseurl($page),
 120         );
 121
 122         run_hooks(pagetemplate => sub {
 123                 shift->(page => $page, destpage => $page, template => $template);
 124         });
 125
 126         $content=$template->output;
 127
 128         run_hooks(format => sub {
 129                 $content=shift->(
 130                         page => $page,
 131                         content => $content,
 132                 );
 133         });
 134
 135         return $content;
 136 } #}}}
 137
 138 sub mtime ($) { #{{{
 139         my $file=shift;
 140
 141         return (stat($file))[9];
 142 } #}}}
 143
 144 sub scan ($) { #{{{
 145         my $file=shift;
 146
 147         my $type=pagetype($file);
 148         if (defined $type) {
 149                 my $srcfile=srcfile($file);
 150                 my $content=readfile($srcfile);
 151                 my $page=pagename($file);
 152                 will_render($page, htmlpage($page), 1);
 153
 154                 # Always needs to be done, since filters might add links
 155                 # to the content.
 156                 $content=filter($page, $content);
 157
 158                 my @links;
 159                 while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 160                         push @links, titlepage($2);
 161                 }
 162                 if ($config{discussion}) {
 163                         # Discussion links are a special case since they're
 164                         # not in the text of the page, but on its template.
 165                         push @links, $page."/".gettext("discussion");
 166                 }
 167                 $links{$page}=\@links;
 168
 169                 # Preprocess in scan-only mode.
 170                 preprocess($page, $page, $content, 1);
 171         }
 172         else {
 173                 will_render($file, $file, 1);
 174         }
 175 } #}}}
 176
 177 sub render ($) { #{{{
 178         my $file=shift;
 179
 180         my $type=pagetype($file);
 181         my $srcfile=srcfile($file);
 182         if (defined $type) {
 183                 my $content=readfile($srcfile);
 184                 my $page=pagename($file);
 185                 delete $depends{$page};
 186                 will_render($page, htmlpage($page), 1);
 187
 188                 $content=filter($page, $content);
 189                 $content=preprocess($page, $page, $content);
 190                 $content=linkify($page, $page, $content);
 191                 $content=htmlize($page, $type, $content);
 192
 193                 writefile(htmlpage($page), $config{destdir},
 194                         genpage($page, $content, mtime($srcfile)));
 195                 $oldpagemtime{$page}=time;
 196         }
 197         else {
 198                 my $srcfd=readfile($srcfile, 1, 1);
 199                 delete $depends{$file};
 200                 will_render($file, $file, 1);
 201                 writefile($file, $config{destdir}, undef, 1, sub {
 202                         my $destfd=shift;
 203                         my $cleanup=shift;
 204
 205                         my $blksize = 16384;
 206                         my ($len, $buf, $written);
 207                         while ($len = sysread $srcfd, $buf, $blksize) {
 208                                 if (! defined $len) {
 209                                         next if $! =~ /^Interrupted/;
 210                                         error("failed to read $srcfile: $!", $cleanup);
 211                                 }
 212                                 my $offset = 0;
 213                                 while ($len) {
 214                                         defined($written = syswrite $destfd, $buf, $len, $offset)
 215                                                 or error("failed to write $file: $!", $cleanup);
 216                                         $len -= $written;
 217                                         $offset += $written;
 218                                 }
 219                         }
 220                 });
 221                 $oldpagemtime{$file}=time;
 222         }
 223 } #}}}
 224
 225 sub prune ($) { #{{{
 226         my $file=shift;
 227
 228         unlink($file);
 229         my $dir=dirname($file);
 230         while (rmdir($dir)) {
 231                 $dir=dirname($dir);
 232         }
 233 } #}}}
 234
 235 sub refresh () { #{{{
 236         # find existing pages
 237         my %exists;
 238         my @files;
 239         eval q{use File::Find};
 240         error($@) if $@;
 241         find({
 242                 no_chdir => 1,
 243                 wanted => sub {
 244                         $_=decode_utf8($_);
 245                         if (file_pruned($_, $config{srcdir})) {
 246                                 $File::Find::prune=1;
 247                         }
 248                         elsif (! -d $_ && ! -l $_) {
 249                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 250                                 if (! defined $f) {
 251                                         warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 252                                 }
 253                                 else {
 254                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 255                                         push @files, $f;
 256                                         $exists{pagename($f)}=1;
 257                                 }
 258                         }
 259                 },
 260         }, $config{srcdir});
 261         find({
 262                 no_chdir => 1,
 263                 wanted => sub {
 264                         $_=decode_utf8($_);
 265                         if (file_pruned($_, $config{underlaydir})) {
 266                                 $File::Find::prune=1;
 267                         }
 268                         elsif (! -d $_ && ! -l $_) {
 269                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 270                                 if (! defined $f) {
 271                                         warn(sprintf(gettext("skipping bad filename %s"), $_)."\n");
 272                                 }
 273                                 else {
 274                                         # Don't add pages that are in the
 275                                         # srcdir.
 276                                         $f=~s/^\Q$config{underlaydir}\E\/?//;
 277                                         if (! -e "$config{srcdir}/$f" &&
 278                                             ! -l "$config{srcdir}/$f") {
 279                                                 my $page=pagename($f);
 280                                                 if (! $exists{$page}) {
 281                                                         push @files, $f;
 282                                                         $exists{$page}=1;
 283                                                 }
 284                                         }
 285                                 }
 286                         }
 287                 },
 288         }, $config{underlaydir});
 289
 290         my %rendered;
 291
 292         # check for added or removed pages
 293         my @add;
 294         foreach my $file (@files) {
 295                 my $page=pagename($file);
 296                 $pagesources{$page}=$file;
 297                 if (! $oldpagemtime{$page}) {
 298                         push @add, $file;
 299                         $pagecase{lc $page}=$page;
 300                         if ($config{getctime} && -e "$config{srcdir}/$file") {
 301                                 $pagectime{$page}=rcs_getctime("$config{srcdir}/$file");
 302                         }
 303                         elsif (! exists $pagectime{$page}) {
 304                                 $pagectime{$page}=mtime(srcfile($file));
 305                         }
 306                 }
 307         }
 308         my @del;
 309         foreach my $page (keys %oldpagemtime) {
 310                 if (! $exists{$page}) {
 311                         debug(sprintf(gettext("removing old page %s"), $page));
 312                         push @del, $pagesources{$page};
 313                         $links{$page}=[];
 314                         $renderedfiles{$page}=[];
 315                         $oldpagemtime{$page}=0;
 316                         prune($config{destdir}."/".$_)
 317                                 foreach @{$oldrenderedfiles{$page}};
 318                         delete $pagesources{$page};
 319                 }
 320         }
 321
 322         # scan changed and new files
 323         my @changed;
 324         foreach my $file (@files) {
 325                 my $page=pagename($file);
 326
 327                 if (! exists $oldpagemtime{$page} ||
 328                     mtime(srcfile($file)) > $oldpagemtime{$page} ||
 329                     $forcerebuild{$page}) {
 330                         debug(sprintf(gettext("scanning %s"), $file));
 331                         push @changed, $file;
 332                         scan($file);
 333                 }
 334         }
 335         calculate_backlinks();
 336
 337         # render changed and new pages
 338         foreach my $file (@changed) {
 339                 debug(sprintf(gettext("rendering %s"), $file));
 340                 render($file);
 341                 $rendered{$file}=1;
 342         }
 343
 344         # rebuild pages that link to added or removed pages
 345         if (@add || @del) {
 346                 foreach my $f (@add, @del) {
 347                         my $p=pagename($f);
 348                         foreach my $page (keys %{$backlinks{$p}}) {
 349                                 my $file=$pagesources{$page};
 350                                 next if $rendered{$file};
 351                                 debug(sprintf(gettext("rendering %s, which links to %s"), $file, $p));
 352                                 render($file);
 353                                 $rendered{$file}=1;
 354                         }
 355                 }
 356         }
 357
 358         if (%rendered || @del) {
 359                 # rebuild dependant pages
 360                 foreach my $f (@files) {
 361                         next if $rendered{$f};
 362                         my $p=pagename($f);
 363                         if (exists $depends{$p}) {
 364                                 foreach my $file (keys %rendered, @del) {
 365                                         next if $f eq $file;
 366                                         my $page=pagename($file);
 367                                         if (pagespec_match($page, $depends{$p}, $p)) {
 368                                                 debug(sprintf(gettext("rendering %s, which depends on %s"), $f, $page));
 369                                                 render($f);
 370                                                 $rendered{$f}=1;
 371                                                 last;
 372                                         }
 373                                 }
 374                         }
 375                 }
 376
 377                 # handle backlinks; if a page has added/removed links,
 378                 # update the pages it links to
 379                 my %linkchanged;
 380                 foreach my $file (keys %rendered, @del) {
 381                         my $page=pagename($file);
 382
 383                         if (exists $links{$page}) {
 384                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 385                                         if (length $link &&
 386                                             (! exists $oldlinks{$page} ||
 387                                              ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
 388                                                 $linkchanged{$link}=1;
 389                                         }
 390                                 }
 391                         }
 392                         if (exists $oldlinks{$page}) {
 393                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 394                                         if (length $link &&
 395                                             (! exists $links{$page} ||
 396                                              ! grep { bestlink($page, $_) eq $link } @{$links{$page}})) {
 397                                                 $linkchanged{$link}=1;
 398                                         }
 399                                 }
 400                         }
 401                 }
 402                 foreach my $link (keys %linkchanged) {
 403                         my $linkfile=$pagesources{$link};
 404                         if (defined $linkfile) {
 405                                 next if $rendered{$linkfile};
 406                                 debug(sprintf(gettext("rendering %s, to update its backlinks"), $linkfile));
 407                                 render($linkfile);
 408                                 $rendered{$linkfile}=1;
 409                         }
 410                 }
 411         }
 412
 413         # remove no longer rendered files
 414         foreach my $src (keys %rendered) {
 415                 my $page=pagename($src);
 416                 foreach my $file (@{$oldrenderedfiles{$page}}) {
 417                         if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
 418                                 debug(sprintf(gettext("removing %s, no longer rendered by %s"), $file, $page));
 419                                 prune($config{destdir}."/".$file);
 420                         }
 421                 }
 422         }
 423
 424         if (@del) {
 425                 run_hooks(delete => sub { shift->(@del) });
 426         }
 427         if (%rendered) {
 428                 run_hooks(change => sub { shift->(keys %rendered) });
 429         }
 430 } #}}}
 431
 432 sub commandline_render () { #{{{
 433         loadplugins();
 434         checkconfig();
 435         lockwiki();
 436         loadindex();
 437         unlockwiki();
 438
 439         my $srcfile=possibly_foolish_untaint($config{render});
 440         my $file=$srcfile;
 441         $file=~s/\Q$config{srcdir}\E\/?//;
 442
 443         my $type=pagetype($file);
 444         die sprintf(gettext("ikiwiki: cannot render %s"), $srcfile)."\n" unless defined $type;
 445         my $content=readfile($srcfile);
 446         my $page=pagename($file);
 447         $pagesources{$page}=$file;
 448         $content=filter($page, $content);
 449         $content=preprocess($page, $page, $content);
 450         $content=linkify($page, $page, $content);
 451         $content=htmlize($page, $type, $content);
 452
 453         print genpage($page, $content, mtime($srcfile));
 454         exit 0;
 455 } #}}}
 456
 457 1