IkiWiki/Render.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4
   5 use warnings;
   6 use strict;
   7 use File::Spec;
   8 use IkiWiki;
   9
  10 sub linkify ($$$) { #{{{
  11         my $lpage=shift;
  12         my $page=shift;
  13         my $content=shift;
  14
  15         $content =~ s{(\\?)$config{wiki_link_regexp}}{
  16                 $2 ? ( $1 ? "[[$2|$3]]" : htmllink($lpage, $page, titlepage($3), 0, 0, pagetitle($2)))
  17                    : ( $1 ? "[[$3]]" :    htmllink($lpage, $page, titlepage($3)))
  18         }eg;
  19
  20         return $content;
  21 } #}}}
  22
  23 sub htmlize ($$) { #{{{
  24         my $type=shift;
  25         my $content=shift;
  26
  27         if (! $INC{"/usr/bin/markdown"}) {
  28                 no warnings 'once';
  29                 $blosxom::version="is a proper perl module too much to ask?";
  30                 use warnings 'all';
  31                 do "/usr/bin/markdown";
  32                 use Encode;
  33         }
  34
  35         if ($type eq '.mdwn') {
  36                 # XXX explanation of this insanity wating on perl bug number
  37 #               $content=Encode::encode_utf8($content);
  38                 $content=Encode::encode_utf8($content);
  39                 $content=Markdown::Markdown($content);
  40                 $content=Encode::decode_utf8($content);
  41 #               $content=Encode::decode_utf8($content);
  42         }
  43         else {
  44                 error("htmlization of $type not supported");
  45         }
  46
  47         if (exists $hooks{sanitize}) {
  48                 foreach my $id (keys %{$hooks{sanitize}}) {
  49                         $content=$hooks{sanitize}{$id}{call}->($content);
  50                 }
  51         }
  52
  53         return $content;
  54 } #}}}
  55
  56 sub backlinks ($) { #{{{
  57         my $page=shift;
  58
  59         my @links;
  60         foreach my $p (keys %links) {
  61                 next if bestlink($page, $p) eq $page;
  62                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
  63                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
  64
  65                         # Trim common dir prefixes from both pages.
  66                         my $p_trimmed=$p;
  67                         my $page_trimmed=$page;
  68                         my $dir;
  69                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
  70                                 defined $dir &&
  71                                 $p_trimmed=~s/^\Q$dir\E// &&
  72                                 $page_trimmed=~s/^\Q$dir\E//;
  73
  74                         push @links, { url => $href, page => $p_trimmed };
  75                 }
  76         }
  77
  78         return sort { $a->{page} cmp $b->{page} } @links;
  79 } #}}}
  80
  81 sub parentlinks ($) { #{{{
  82         my $page=shift;
  83
  84         my @ret;
  85         my $pagelink="";
  86         my $path="";
  87         my $skip=1;
  88         foreach my $dir (reverse split("/", $page)) {
  89                 if (! $skip) {
  90                         $path.="../";
  91                         unshift @ret, { url => "$path$dir.html", page => $dir };
  92                 }
  93                 else {
  94                         $skip=0;
  95                 }
  96         }
  97         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
  98         return @ret;
  99 } #}}}
 100
 101 sub preprocess ($$;$) { #{{{
 102         my $page=shift;
 103         my $content=shift;
 104         my $onlystrip=shift || 0; # strip directives without processing
 105
 106         my $handle=sub {
 107                 my $escape=shift;
 108                 my $command=shift;
 109                 my $params=shift;
 110                 if (length $escape) {
 111                         return "[[$command $params]]";
 112                 }
 113                 elsif ($onlystrip) {
 114                         return "";
 115                 }
 116                 elsif (exists $hooks{preprocess}{$command}) {
 117                         # Note: preserve order of params, some plugins may
 118                         # consider it significant.
 119                         my @params;
 120                         while ($params =~ /(\w+)=\"?([^"]+)"?(\s+|$)/g) {
 121                                 push @params, $1, $2;
 122                         }
 123                         return $hooks{preprocess}{$command}{call}->(@params, page => $page);
 124                 }
 125                 else {
 126                         return "[[$command not processed]]";
 127                 }
 128         };
 129
 130         $content =~ s{(\\?)$config{wiki_processor_regexp}}{$handle->($1, $2, $3)}eg;
 131         return $content;
 132 } #}}}
 133
 134 sub add_depends ($$) { #{{{
 135         my $page=shift;
 136         my $globlist=shift;
 137
 138         if (! exists $depends{$page}) {
 139                 $depends{$page}=$globlist;
 140         }
 141         else {
 142                 $depends{$page}=globlist_merge($depends{$page}, $globlist);
 143         }
 144 } # }}}
 145
 146 sub globlist_merge ($$) { #{{{
 147         my $a=shift;
 148         my $b=shift;
 149
 150         my $ret="";
 151         # Only add negated globs if they are not matched by the other globlist.
 152         foreach my $i ((map { [ $a, $_ ] } split(" ", $b)),
 153                        (map { [ $b, $_ ] } split(" ", $a))) {
 154                 if ($i->[1]=~/^!(.*)/) {
 155                         if (! globlist_match($1, $i->[0])) {
 156                                 $ret.=" ".$i->[1];
 157                         }
 158                 }
 159                 else {
 160                         $ret.=" ".$i->[1];
 161                 }
 162         }
 163
 164         return $ret;
 165 } #}}}
 166
 167 sub genpage ($$$) { #{{{
 168         my $page=shift;
 169         my $content=shift;
 170         my $mtime=shift;
 171
 172         my $title=pagetitle(basename($page));
 173
 174         my $template=HTML::Template->new(blind_cache => 1,
 175                 filename => "$config{templatedir}/page.tmpl");
 176         my $actions=0;
 177
 178         if (length $config{cgiurl}) {
 179                 $template->param(editurl => cgiurl(do => "edit", page => $page));
 180                 $template->param(prefsurl => cgiurl(do => "prefs"));
 181                 if ($config{rcs}) {
 182                         $template->param(recentchangesurl => cgiurl(do => "recentchanges"));
 183                 }
 184                 $actions++;
 185         }
 186
 187         if (length $config{historyurl}) {
 188                 my $u=$config{historyurl};
 189                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
 190                 $template->param(historyurl => $u);
 191                 $actions++;
 192         }
 193         if ($config{discussion}) {
 194                 $template->param(discussionlink => htmllink($page, $page, "Discussion", 1, 1));
 195                 $actions++;
 196         }
 197
 198         if ($actions) {
 199                 $template->param(have_actions => 1);
 200         }
 201
 202         $template->param(
 203                 title => $title,
 204                 wikiname => $config{wikiname},
 205                 parentlinks => [parentlinks($page)],
 206                 content => $content,
 207                 backlinks => [backlinks($page)],
 208                 mtime => displaytime($mtime),
 209                 styleurl => styleurl($page),
 210         );
 211
 212         if (exists $hooks{pagetemplate}) {
 213                 foreach my $id (keys %{$hooks{pagetemplate}}) {
 214                         $hooks{pagetemplate}{$id}{call}->($page, $template);
 215                 }
 216         }
 217
 218         return $template->output;
 219 } #}}}
 220
 221 sub check_overwrite ($$) { #{{{
 222         # Important security check. Make sure to call this before saving
 223         # any files to the source directory.
 224         my $dest=shift;
 225         my $src=shift;
 226
 227         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 228                 error("$dest already exists and was rendered from ".
 229                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 230                                 %renderedfiles)).
 231                         ", before, so not rendering from $src");
 232         }
 233 } #}}}
 234
 235 sub displaytime ($) { #{{{
 236         my $time=shift;
 237
 238         eval q{use POSIX};
 239         # strftime doesn't know about encodings, so make sure
 240         # its output is properly treated as utf8
 241         return Encode::decode_utf8(POSIX::strftime(
 242                         $config{timeformat}, localtime($time)));
 243 } #}}}
 244
 245 sub mtime ($) { #{{{
 246         my $file=shift;
 247
 248         return (stat($file))[9];
 249 } #}}}
 250
 251 sub findlinks ($$) { #{{{
 252         my $page=shift;
 253         my $content=shift;
 254
 255         my @links;
 256         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 257                 push @links, titlepage($2);
 258         }
 259         if ($config{discussion}) {
 260                 # Discussion links are a special case since they're not in the
 261                 # text of the page, but on its template.
 262                 return @links, "$page/discussion";
 263         }
 264         else {
 265                 return @links;
 266         }
 267 } #}}}
 268
 269 sub render ($) { #{{{
 270         my $file=shift;
 271
 272         my $type=pagetype($file);
 273         my $srcfile=srcfile($file);
 274         if ($type ne 'unknown') {
 275                 my $content=readfile($srcfile);
 276                 my $page=pagename($file);
 277                 delete $depends{$page};
 278
 279                 if (exists $hooks{filter}) {
 280                         foreach my $id (keys %{$hooks{filter}}) {
 281                                 $content=$hooks{filter}{$id}{call}->(
 282                                         page => $page,
 283                                         content => $content
 284                                 );
 285                         }
 286                 }
 287
 288                 $links{$page}=[findlinks($page, $content)];
 289
 290                 $content=linkify($page, $page, $content);
 291                 $content=preprocess($page, $content);
 292                 $content=htmlize($type, $content);
 293
 294                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 295                 writefile(htmlpage($page), $config{destdir},
 296                         genpage($page, $content, mtime($srcfile)));
 297                 $oldpagemtime{$page}=time;
 298                 $renderedfiles{$page}=htmlpage($page);
 299         }
 300         else {
 301                 my $content=readfile($srcfile, 1);
 302                 $links{$file}=[];
 303                 delete $depends{$file};
 304                 check_overwrite("$config{destdir}/$file", $file);
 305                 writefile($file, $config{destdir}, $content, 1);
 306                 $oldpagemtime{$file}=time;
 307                 $renderedfiles{$file}=$file;
 308         }
 309 } #}}}
 310
 311 sub prune ($) { #{{{
 312         my $file=shift;
 313
 314         unlink($file);
 315         my $dir=dirname($file);
 316         while (rmdir($dir)) {
 317                 $dir=dirname($dir);
 318         }
 319 } #}}}
 320
 321 sub refresh () { #{{{
 322         # find existing pages
 323         my %exists;
 324         my @files;
 325         eval q{use File::Find};
 326         find({
 327                 no_chdir => 1,
 328                 wanted => sub {
 329                         if (/$config{wiki_file_prune_regexp}/) {
 330                                 $File::Find::prune=1;
 331                         }
 332                         elsif (! -d $_ && ! -l $_) {
 333                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 334                                 if (! defined $f) {
 335                                         warn("skipping bad filename $_\n");
 336                                 }
 337                                 else {
 338                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 339                                         push @files, $f;
 340                                         $exists{pagename($f)}=1;
 341                                 }
 342                         }
 343                 },
 344         }, $config{srcdir});
 345         find({
 346                 no_chdir => 1,
 347                 wanted => sub {
 348                         if (/$config{wiki_file_prune_regexp}/) {
 349                                 $File::Find::prune=1;
 350                         }
 351                         elsif (! -d $_ && ! -l $_) {
 352                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 353                                 if (! defined $f) {
 354                                         warn("skipping bad filename $_\n");
 355                                 }
 356                                 else {
 357                                         # Don't add files that are in the
 358                                         # srcdir.
 359                                         $f=~s/^\Q$config{underlaydir}\E\/?//;
 360                                         if (! -e "$config{srcdir}/$f" &&
 361                                             ! -l "$config{srcdir}/$f") {
 362                                                 push @files, $f;
 363                                                 $exists{pagename($f)}=1;
 364                                         }
 365                                 }
 366                         }
 367                 },
 368         }, $config{underlaydir});
 369
 370         my %rendered;
 371
 372         # check for added or removed pages
 373         my @add;
 374         foreach my $file (@files) {
 375                 my $page=pagename($file);
 376                 if (! $oldpagemtime{$page}) {
 377                         debug("new page $page") unless exists $pagectime{$page};
 378                         push @add, $file;
 379                         $links{$page}=[];
 380                         $pagesources{$page}=$file;
 381                         if ($config{getctime} && -e "$config{srcdir}/$file") {
 382                                 $pagectime{$page}=rcs_getctime("$config{srcdir}/$file");
 383                         }
 384                         elsif (! exists $pagectime{$page}) {
 385                                 $pagectime{$page}=mtime(srcfile($file));
 386                         }
 387                 }
 388         }
 389         my @del;
 390         foreach my $page (keys %oldpagemtime) {
 391                 if (! $exists{$page}) {
 392                         debug("removing old page $page");
 393                         push @del, $pagesources{$page};
 394                         prune($config{destdir}."/".$renderedfiles{$page});
 395                         delete $renderedfiles{$page};
 396                         $oldpagemtime{$page}=0;
 397                         delete $pagesources{$page};
 398                 }
 399         }
 400
 401         # render any updated files
 402         foreach my $file (@files) {
 403                 my $page=pagename($file);
 404
 405                 if (! exists $oldpagemtime{$page} ||
 406                     mtime(srcfile($file)) > $oldpagemtime{$page}) {
 407                         debug("rendering changed file $file");
 408                         render($file);
 409                         $rendered{$file}=1;
 410                 }
 411         }
 412
 413         # if any files were added or removed, check to see if each page
 414         # needs an update due to linking to them or inlining them.
 415         # TODO: inefficient; pages may get rendered above and again here;
 416         # problem is the bestlink may have changed and we won't know until
 417         # now
 418         if (@add || @del) {
 419 FILE:           foreach my $file (@files) {
 420                         my $page=pagename($file);
 421                         foreach my $f (@add, @del) {
 422                                 my $p=pagename($f);
 423                                 foreach my $link (@{$links{$page}}) {
 424                                         if (bestlink($page, $link) eq $p) {
 425                                                 debug("rendering $file, which links to $p");
 426                                                 render($file);
 427                                                 $rendered{$file}=1;
 428                                                 next FILE;
 429                                         }
 430                                 }
 431                         }
 432                 }
 433         }
 434
 435         # Handle backlinks; if a page has added/removed links, update the
 436         # pages it links to. Also handles rebuilding dependant pages.
 437         # TODO: inefficient; pages may get rendered above and again here;
 438         # problem is the backlinks could be wrong in the first pass render
 439         # above
 440         if (%rendered || @del) {
 441                 foreach my $f (@files) {
 442                         my $p=pagename($f);
 443                         if (exists $depends{$p}) {
 444                                 foreach my $file (keys %rendered, @del) {
 445                                         next if $f eq $file;
 446                                         my $page=pagename($file);
 447                                         if (globlist_match($page, $depends{$p})) {
 448                                                 debug("rendering $f, which depends on $page");
 449                                                 render($f);
 450                                                 $rendered{$f}=1;
 451                                                 last;
 452                                         }
 453                                 }
 454                         }
 455                 }
 456
 457                 my %linkchanged;
 458                 foreach my $file (keys %rendered, @del) {
 459                         my $page=pagename($file);
 460
 461                         if (exists $links{$page}) {
 462                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 463                                         if (length $link &&
 464                                             (! exists $oldlinks{$page} ||
 465                                              ! grep { bestlink($page, $_) eq $link } @{$oldlinks{$page}})) {
 466                                                 $linkchanged{$link}=1;
 467                                         }
 468                                 }
 469                         }
 470                         if (exists $oldlinks{$page}) {
 471                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 472                                         if (length $link &&
 473                                             (! exists $links{$page} ||
 474                                              ! grep { bestlink($page, $_) eq $link } @{$links{$page}})) {
 475                                                 $linkchanged{$link}=1;
 476                                         }
 477                                 }
 478                         }
 479                 }
 480                 foreach my $link (keys %linkchanged) {
 481                         my $linkfile=$pagesources{$link};
 482                         if (defined $linkfile) {
 483                                 debug("rendering $linkfile, to update its backlinks");
 484                                 render($linkfile);
 485                                 $rendered{$linkfile}=1;
 486                         }
 487                 }
 488         }
 489
 490         if (@del && exists $hooks{delete}) {
 491                 foreach my $id (keys %{$hooks{delete}}) {
 492                         $hooks{delete}{$id}{call}->(@del);
 493                 }
 494         }
 495         if (%rendered && exists $hooks{change}) {
 496                 foreach my $id (keys %{$hooks{change}}) {
 497                         $hooks{change}{$id}{call}->(keys %rendered);
 498                 }
 499         }
 500 } #}}}
 501
 502 1