ikiwiki

   1 #!/usr/bin/perl -T
   2 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
   3
   4 use warnings;
   5 use strict;
   6 use Memoize;
   7 use File::Spec;
   8 use HTML::Template;
   9 use Getopt::Long;
  10
  11 my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
  12
  13 # Holds global config settings, also used by some modules.
  14 our %config=( #{{{
  15         wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$)},
  16         wiki_link_regexp => qr/\[\[([^\s\]]+)\]\]/,
  17         wiki_file_regexp => qr/(^[-A-Za-z0-9_.:\/+]+$)/,
  18         verbose => 0,
  19         wikiname => "wiki",
  20         default_pageext => ".mdwn",
  21         cgi => 0,
  22         svn => 1,
  23         url => '',
  24         cgiurl => '',
  25         historyurl => '',
  26         diffurl => '',
  27         anonok => 0,
  28         rebuild => 0,
  29         wrapper => undef,
  30         wrappermode => undef,
  31         srcdir => undef,
  32         destdir => undef,
  33         templatedir => undef,
  34         setup => undef,
  35 ); #}}}
  36
  37 GetOptions( #{{{
  38         "setup=s" => \$config{setup},
  39         "wikiname=s" => \$config{wikiname},
  40         "verbose|v!" => \$config{verbose},
  41         "rebuild!" => \$config{rebuild},
  42         "wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
  43         "wrappermode=i" => \$config{wrappermode},
  44         "svn!" => \$config{svn},
  45         "anonok!" => \$config{anonok},
  46         "cgi!" => \$config{cgi},
  47         "url=s" => \$config{url},
  48         "cgiurl=s" => \$config{cgiurl},
  49         "historyurl=s" => \$config{historyurl},
  50         "diffurl=s" => \$config{diffurl},
  51         "exclude=s@" => sub {
  52                 $config{wiki_file_prune_regexp}=qr/$config{wiki_file_prune_regexp}|$_[1]/;
  53         },
  54 ) || usage();
  55
  56 if (! $config{setup}) {
  57         usage() unless @ARGV == 3;
  58         $config{srcdir} = possibly_foolish_untaint(shift);
  59         $config{templatedir} = possibly_foolish_untaint(shift);
  60         $config{destdir} = possibly_foolish_untaint(shift);
  61         if ($config{cgi} && ! length $config{url}) {
  62                 error("Must specify url to wiki with --url when using --cgi");
  63         }
  64 }
  65 #}}}
  66
  67 sub usage { #{{{
  68         die "usage: ikiwiki [options] source templates dest\n";
  69 } #}}}
  70
  71 sub error { #{{{
  72         if ($config{cgi}) {
  73                 print "Content-type: text/html\n\n";
  74                 print misctemplate("Error", "<p>Error: @_</p>");
  75         }
  76         die @_;
  77 } #}}}
  78
  79 sub debug ($) { #{{{
  80         return unless $config{verbose};
  81         if (! $config{cgi}) {
  82                 print "@_\n";
  83         }
  84         else {
  85                 print STDERR "@_\n";
  86         }
  87 } #}}}
  88
  89 sub mtime ($) { #{{{
  90         my $page=shift;
  91
  92         return (stat($page))[9];
  93 } #}}}
  94
  95 sub possibly_foolish_untaint { #{{{
  96         my $tainted=shift;
  97         my ($untainted)=$tainted=~/(.*)/;
  98         return $untainted;
  99 } #}}}
 100
 101 sub basename ($) { #{{{
 102         my $file=shift;
 103
 104         $file=~s!.*/!!;
 105         return $file;
 106 } #}}}
 107
 108 sub dirname ($) { #{{{
 109         my $file=shift;
 110
 111         $file=~s!/?[^/]+$!!;
 112         return $file;
 113 } #}}}
 114
 115 sub pagetype ($) { #{{{
 116         my $page=shift;
 117
 118         if ($page =~ /\.mdwn$/) {
 119                 return ".mdwn";
 120         }
 121         else {
 122                 return "unknown";
 123         }
 124 } #}}}
 125
 126 sub pagename ($) { #{{{
 127         my $file=shift;
 128
 129         my $type=pagetype($file);
 130         my $page=$file;
 131         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
 132         return $page;
 133 } #}}}
 134
 135 sub htmlpage ($) { #{{{
 136         my $page=shift;
 137
 138         return $page.".html";
 139 } #}}}
 140
 141 sub readfile ($) { #{{{
 142         my $file=shift;
 143
 144         local $/=undef;
 145         open (IN, "$file") || error("failed to read $file: $!");
 146         my $ret=<IN>;
 147         close IN;
 148         return $ret;
 149 } #}}}
 150
 151 sub writefile ($$) { #{{{
 152         my $file=shift;
 153         my $content=shift;
 154
 155         my $dir=dirname($file);
 156         if (! -d $dir) {
 157                 my $d="";
 158                 foreach my $s (split(m!/+!, $dir)) {
 159                         $d.="$s/";
 160                         if (! -d $d) {
 161                                 mkdir($d) || error("failed to create directory $d: $!");
 162                         }
 163                 }
 164         }
 165
 166         open (OUT, ">$file") || error("failed to write $file: $!");
 167         print OUT $content;
 168         close OUT;
 169 } #}}}
 170
 171 sub findlinks ($$) { #{{{
 172         my $content=shift;
 173         my $page=shift;
 174
 175         my @links;
 176         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 177                 push @links, lc($1);
 178         }
 179         # Discussion links are a special case since they're not in the text
 180         # of the page, but on its template.
 181         return @links, "$page/discussion";
 182 } #}}}
 183
 184 sub bestlink ($$) { #{{{
 185         # Given a page and the text of a link on the page, determine which
 186         # existing page that link best points to. Prefers pages under a
 187         # subdirectory with the same name as the source page, failing that
 188         # goes down the directory tree to the base looking for matching
 189         # pages.
 190         my $page=shift;
 191         my $link=lc(shift);
 192
 193         my $cwd=$page;
 194         do {
 195                 my $l=$cwd;
 196                 $l.="/" if length $l;
 197                 $l.=$link;
 198
 199                 if (exists $links{$l}) {
 200                         #debug("for $page, \"$link\", use $l");
 201                         return $l;
 202                 }
 203         } while $cwd=~s!/?[^/]+$!!;
 204
 205         #print STDERR "warning: page $page, broken link: $link\n";
 206         return "";
 207 } #}}}
 208
 209 sub isinlinableimage ($) { #{{{
 210         my $file=shift;
 211
 212         $file=~/\.(png|gif|jpg|jpeg)$/;
 213 } #}}}
 214
 215 sub htmllink { #{{{
 216         my $page=shift;
 217         my $link=shift;
 218         my $noimageinline=shift; # don't turn links into inline html images
 219         my $forcesubpage=shift; # force a link to a subpage
 220
 221         my $bestlink;
 222         if (! $forcesubpage) {
 223                 $bestlink=bestlink($page, $link);
 224         }
 225         else {
 226                 $bestlink="$page/".lc($link);
 227         }
 228
 229         return $link if length $bestlink && $page eq $bestlink;
 230
 231         # TODO BUG: %renderedfiles may not have it, if the linked to page
 232         # was also added and isn't yet rendered! Note that this bug is
 233         # masked by the bug mentioned below that makes all new files
 234         # be rendered twice.
 235         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 236                 $bestlink=htmlpage($bestlink);
 237         }
 238         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 239                 return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
 240         }
 241
 242         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 243
 244         if (! $noimageinline && isinlinableimage($bestlink)) {
 245                 return "<img src=\"$bestlink\">";
 246         }
 247         return "<a href=\"$bestlink\">$link</a>";
 248 } #}}}
 249
 250 sub linkify ($$) { #{{{
 251         my $content=shift;
 252         my $page=shift;
 253
 254         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 255                 $1 ? "[[$2]]" : htmllink($page, $2)
 256         }eg;
 257
 258         return $content;
 259 } #}}}
 260
 261 sub htmlize ($$) { #{{{
 262         my $type=shift;
 263         my $content=shift;
 264
 265         if (! $INC{"/usr/bin/markdown"}) {
 266                 no warnings 'once';
 267                 $blosxom::version="is a proper perl module too much to ask?";
 268                 use warnings 'all';
 269                 do "/usr/bin/markdown";
 270         }
 271
 272         if ($type eq '.mdwn') {
 273                 return Markdown::Markdown($content);
 274         }
 275         else {
 276                 error("htmlization of $type not supported");
 277         }
 278 } #}}}
 279
 280 sub backlinks ($) { #{{{
 281         my $page=shift;
 282
 283         my @links;
 284         foreach my $p (keys %links) {
 285                 next if bestlink($page, $p) eq $page;
 286                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 287                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 288
 289                         # Trim common dir prefixes from both pages.
 290                         my $p_trimmed=$p;
 291                         my $page_trimmed=$page;
 292                         my $dir;
 293                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 294                                 defined $dir &&
 295                                 $p_trimmed=~s/^\Q$dir\E// &&
 296                                 $page_trimmed=~s/^\Q$dir\E//;
 297
 298                         push @links, { url => $href, page => $p_trimmed };
 299                 }
 300         }
 301
 302         return sort { $a->{page} cmp $b->{page} } @links;
 303 } #}}}
 304
 305 sub parentlinks ($) { #{{{
 306         my $page=shift;
 307
 308         my @ret;
 309         my $pagelink="";
 310         my $path="";
 311         my $skip=1;
 312         foreach my $dir (reverse split("/", $page)) {
 313                 if (! $skip) {
 314                         $path.="../";
 315                         unshift @ret, { url => "$path$dir.html", page => $dir };
 316                 }
 317                 else {
 318                         $skip=0;
 319                 }
 320         }
 321         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
 322         return @ret;
 323 } #}}}
 324
 325 sub indexlink () { #{{{
 326         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 327 } #}}}
 328
 329 sub finalize ($$$) { #{{{
 330         my $content=shift;
 331         my $page=shift;
 332         my $mtime=shift;
 333
 334         my $title=basename($page);
 335         $title=~s/_/ /g;
 336
 337         my $template=HTML::Template->new(blind_cache => 1,
 338                 filename => "$config{templatedir}/page.tmpl");
 339
 340         if (length $config{cgiurl}) {
 341                 $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
 342                 $template->param(prefsurl => "$config{cgiurl}?do=prefs");
 343                 if ($config{svn}) {
 344                         $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
 345                 }
 346         }
 347
 348         if (length $config{historyurl}) {
 349                 my $u=$config{historyurl};
 350                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
 351                 $template->param(historyurl => $u);
 352         }
 353
 354         $template->param(
 355                 title => $title,
 356                 wikiname => $config{wikiname},
 357                 parentlinks => [parentlinks($page)],
 358                 content => $content,
 359                 backlinks => [backlinks($page)],
 360                 discussionlink => htmllink($page, "Discussion", 1, 1),
 361                 mtime => scalar(gmtime($mtime)),
 362         );
 363
 364         return $template->output;
 365 } #}}}
 366
 367 sub check_overwrite ($$) { #{{{
 368         # Important security check. Make sure to call this before saving
 369         # any files to the source directory.
 370         my $dest=shift;
 371         my $src=shift;
 372
 373         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 374                 error("$dest already exists and was rendered from ".
 375                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 376                                 %renderedfiles)).
 377                         ", before, so not rendering from $src");
 378         }
 379 } #}}}
 380
 381 sub render ($) { #{{{
 382         my $file=shift;
 383
 384         my $type=pagetype($file);
 385         my $content=readfile("$config{srcdir}/$file");
 386         if ($type ne 'unknown') {
 387                 my $page=pagename($file);
 388
 389                 $links{$page}=[findlinks($content, $page)];
 390
 391                 $content=linkify($content, $page);
 392                 $content=htmlize($type, $content);
 393                 $content=finalize($content, $page,
 394                         mtime("$config{srcdir}/$file"));
 395
 396                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 397                 writefile("$config{destdir}/".htmlpage($page), $content);
 398                 $oldpagemtime{$page}=time;
 399                 $renderedfiles{$page}=htmlpage($page);
 400         }
 401         else {
 402                 $links{$file}=[];
 403                 check_overwrite("$config{destdir}/$file", $file);
 404                 writefile("$config{destdir}/$file", $content);
 405                 $oldpagemtime{$file}=time;
 406                 $renderedfiles{$file}=$file;
 407         }
 408 } #}}}
 409
 410 sub lockwiki () { #{{{
 411         # Take an exclusive lock on the wiki to prevent multiple concurrent
 412         # run issues. The lock will be dropped on program exit.
 413         if (! -d "$config{srcdir}/.ikiwiki") {
 414                 mkdir("$config{srcdir}/.ikiwiki");
 415         }
 416         open(WIKILOCK, ">$config{srcdir}/.ikiwiki/lockfile") || error ("cannot write to lockfile: $!");
 417         if (! flock(WIKILOCK, 2 | 4)) {
 418                 debug("wiki seems to be locked, waiting for lock");
 419                 my $wait=600; # arbitrary, but don't hang forever to
 420                               # prevent process pileup
 421                 for (1..600) {
 422                         return if flock(WIKILOCK, 2 | 4);
 423                         sleep 1;
 424                 }
 425                 error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 426         }
 427 } #}}}
 428
 429 sub unlockwiki () { #{{{
 430         close WIKILOCK;
 431 } #}}}
 432
 433 sub loadindex () { #{{{
 434         open (IN, "$config{srcdir}/.ikiwiki/index") || return;
 435         while (<IN>) {
 436                 $_=possibly_foolish_untaint($_);
 437                 chomp;
 438                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 439                 my $page=pagename($file);
 440                 $pagesources{$page}=$file;
 441                 $oldpagemtime{$page}=$mtime;
 442                 $oldlinks{$page}=[@links];
 443                 $links{$page}=[@links];
 444                 $renderedfiles{$page}=$rendered;
 445         }
 446         close IN;
 447 } #}}}
 448
 449 sub saveindex () { #{{{
 450         if (! -d "$config{srcdir}/.ikiwiki") {
 451                 mkdir("$config{srcdir}/.ikiwiki");
 452         }
 453         open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
 454         foreach my $page (keys %oldpagemtime) {
 455                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 456                         join(" ", @{$links{$page}})."\n"
 457                                 if $oldpagemtime{$page};
 458         }
 459         close OUT;
 460 } #}}}
 461
 462 sub rcs_update () { #{{{
 463         if (-d "$config{srcdir}/.svn") {
 464                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 465                         warn("svn update failed\n");
 466                 }
 467         }
 468 } #}}}
 469
 470 sub rcs_prepedit ($) { #{{{
 471         # Prepares to edit a file under revision control. Returns a token
 472         # that must be passed into rcs_commit when the file is ready
 473         # for committing.
 474         # The file is relative to the srcdir.
 475         my $file=shift;
 476
 477         if (-d "$config{srcdir}/.svn") {
 478                 # For subversion, return the revision of the file when
 479                 # editing begins.
 480                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 481                 return defined $rev ? $rev : "";
 482         }
 483 } #}}}
 484
 485 sub rcs_commit ($$$) { #{{{
 486         # Tries to commit the page; returns undef on _success_ and
 487         # a version of the page with the rcs's conflict markers on failure.
 488         # The file is relative to the srcdir.
 489         my $file=shift;
 490         my $message=shift;
 491         my $rcstoken=shift;
 492
 493         if (-d "$config{srcdir}/.svn") {
 494                 # Check to see if the page has been changed by someone
 495                 # else since rcs_prepedit was called.
 496                 my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
 497                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 498                 if (defined $rev && defined $oldrev && $rev != $oldrev) {
 499                         # Merge their changes into the file that we've
 500                         # changed.
 501                         chdir($config{srcdir}); # svn merge wants to be here
 502                         if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
 503                                    "$config{srcdir}/$file") != 0) {
 504                                 warn("svn merge -r$oldrev:$rev failed\n");
 505                         }
 506                 }
 507
 508                 if (system("svn", "commit", "--quiet", "-m",
 509                            possibly_foolish_untaint($message),
 510                            "$config{srcdir}") != 0) {
 511                         my $conflict=readfile("$config{srcdir}/$file");
 512                         if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
 513                                 warn("svn revert failed\n");
 514                         }
 515                         return $conflict;
 516                 }
 517         }
 518         return undef # success
 519 } #}}}
 520
 521 sub rcs_add ($) { #{{{
 522         # filename is relative to the root of the srcdir
 523         my $file=shift;
 524
 525         if (-d "$config{srcdir}/.svn") {
 526                 my $parent=dirname($file);
 527                 while (! -d "$config{srcdir}/$parent/.svn") {
 528                         $file=$parent;
 529                         $parent=dirname($file);
 530                 }
 531
 532                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 533                         warn("svn add failed\n");
 534                 }
 535         }
 536 } #}}}
 537
 538 sub svn_info ($$) { #{{{
 539         my $field=shift;
 540         my $file=shift;
 541
 542         my $info=`LANG=C svn info $file`;
 543         my ($ret)=$info=~/^$field: (.*)$/m;
 544         return $ret;
 545 } #}}}
 546
 547 sub rcs_recentchanges ($) { #{{{
 548         my $num=shift;
 549         my @ret;
 550
 551         eval q{use CGI 'escapeHTML'};
 552         eval q{use Date::Parse};
 553         eval q{use Time::Duration};
 554
 555         if (-d "$config{srcdir}/.svn") {
 556                 my $svn_url=svn_info("URL", $config{srcdir});
 557
 558                 # FIXME: currently assumes that the wiki is somewhere
 559                 # under trunk in svn, doesn't support other layouts.
 560                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 561
 562                 my $div=qr/^--------------------+$/;
 563                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 564                 my $state='start';
 565                 my ($rev, $user, $when, @pages, @message);
 566                 foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
 567                         chomp;
 568                         if ($state eq 'start' && /$div/) {
 569                                 $state='header';
 570                         }
 571                         elsif ($state eq 'header' && /$infoline/) {
 572                                 $rev=$1;
 573                                 $user=$2;
 574                                 $when=concise(ago(time - str2time($3)));
 575                         }
 576                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/([^ ]+)(?:$|\s)/) {
 577                                 my $file=$1;
 578                                 my $diffurl=$config{diffurl};
 579                                 $diffurl=~s/\[\[file\]\]/$file/g;
 580                                 $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
 581                                 $diffurl=~s/\[\[r2\]\]/$rev/g;
 582                                 push @pages, {
 583                                         link => htmllink("", pagename($file), 1),
 584                                         diffurl => $diffurl,
 585                                 } if length $file;
 586                         }
 587                         elsif ($state eq 'header' && /^$/) {
 588                                 $state='body';
 589                         }
 590                         elsif ($state eq 'body' && /$div/) {
 591                                 my $committype="web";
 592                                 if (defined $message[0] &&
 593                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 594                                         $user="$1";
 595                                         $message[0]->{line}=$2;
 596                                 }
 597                                 else {
 598                                         $committype="svn";
 599                                 }
 600
 601                                 push @ret, { rev => $rev,
 602                                         user => htmllink("", $user, 1),
 603                                         committype => $committype,
 604                                         when => $when, message => [@message],
 605                                         pages => [@pages],
 606                                 } if @pages;
 607                                 return @ret if @ret >= $num;
 608
 609                                 $state='header';
 610                                 $rev=$user=$when=undef;
 611                                 @pages=@message=();
 612                         }
 613                         elsif ($state eq 'body') {
 614                                 push @message, {line => escapeHTML($_)},
 615                         }
 616                 }
 617         }
 618
 619         return @ret;
 620 } #}}}
 621
 622 sub prune ($) { #{{{
 623         my $file=shift;
 624
 625         unlink($file);
 626         my $dir=dirname($file);
 627         while (rmdir($dir)) {
 628                 $dir=dirname($dir);
 629         }
 630 } #}}}
 631
 632 sub refresh () { #{{{
 633         # find existing pages
 634         my %exists;
 635         my @files;
 636         eval q{use File::Find};
 637         find({
 638                 no_chdir => 1,
 639                 wanted => sub {
 640                         if (/$config{wiki_file_prune_regexp}/) {
 641                                 no warnings 'once';
 642                                 $File::Find::prune=1;
 643                                 use warnings "all";
 644                         }
 645                         elsif (! -d $_ && ! -l $_) {
 646                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 647                                 if (! defined $f) {
 648                                         warn("skipping bad filename $_\n");
 649                                 }
 650                                 else {
 651                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 652                                         push @files, $f;
 653                                         $exists{pagename($f)}=1;
 654                                 }
 655                         }
 656                 },
 657         }, $config{srcdir});
 658
 659         my %rendered;
 660
 661         # check for added or removed pages
 662         my @add;
 663         foreach my $file (@files) {
 664                 my $page=pagename($file);
 665                 if (! $oldpagemtime{$page}) {
 666                         debug("new page $page");
 667                         push @add, $file;
 668                         $links{$page}=[];
 669                         $pagesources{$page}=$file;
 670                 }
 671         }
 672         my @del;
 673         foreach my $page (keys %oldpagemtime) {
 674                 if (! $exists{$page}) {
 675                         debug("removing old page $page");
 676                         push @del, $pagesources{$page};
 677                         prune($config{destdir}."/".$renderedfiles{$page});
 678                         delete $renderedfiles{$page};
 679                         $oldpagemtime{$page}=0;
 680                         delete $pagesources{$page};
 681                 }
 682         }
 683
 684         # render any updated files
 685         foreach my $file (@files) {
 686                 my $page=pagename($file);
 687
 688                 if (! exists $oldpagemtime{$page} ||
 689                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 690                         debug("rendering changed file $file");
 691                         render($file);
 692                         $rendered{$file}=1;
 693                 }
 694         }
 695
 696         # if any files were added or removed, check to see if each page
 697         # needs an update due to linking to them
 698         # TODO: inefficient; pages may get rendered above and again here;
 699         # problem is the bestlink may have changed and we won't know until
 700         # now
 701         if (@add || @del) {
 702 FILE:           foreach my $file (@files) {
 703                         my $page=pagename($file);
 704                         foreach my $f (@add, @del) {
 705                                 my $p=pagename($f);
 706                                 foreach my $link (@{$links{$page}}) {
 707                                         if (bestlink($page, $link) eq $p) {
 708                                                 debug("rendering $file, which links to $p");
 709                                                 render($file);
 710                                                 $rendered{$file}=1;
 711                                                 next FILE;
 712                                         }
 713                                 }
 714                         }
 715                 }
 716         }
 717
 718         # handle backlinks; if a page has added/removed links, update the
 719         # pages it links to
 720         # TODO: inefficient; pages may get rendered above and again here;
 721         # problem is the backlinks could be wrong in the first pass render
 722         # above
 723         if (%rendered) {
 724                 my %linkchanged;
 725                 foreach my $file (keys %rendered, @del) {
 726                         my $page=pagename($file);
 727                         if (exists $links{$page}) {
 728                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 729                                         if (length $link &&
 730                                             ! exists $oldlinks{$page} ||
 731                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 732                                                 $linkchanged{$link}=1;
 733                                         }
 734                                 }
 735                         }
 736                         if (exists $oldlinks{$page}) {
 737                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 738                                         if (length $link &&
 739                                             ! exists $links{$page} ||
 740                                             ! grep { $_ eq $link } @{$links{$page}}) {
 741                                                 $linkchanged{$link}=1;
 742                                         }
 743                                 }
 744                         }
 745                 }
 746                 foreach my $link (keys %linkchanged) {
 747                         my $linkfile=$pagesources{$link};
 748                         if (defined $linkfile) {
 749                                 debug("rendering $linkfile, to update its backlinks");
 750                                 render($linkfile);
 751                         }
 752                 }
 753         }
 754 } #}}}
 755
 756 sub gen_wrapper (@) { #{{{
 757         my %config=(@_);
 758         eval q{use Cwd 'abs_path'};
 759         $config{srcdir}=abs_path($config{srcdir});
 760         $config{destdir}=abs_path($config{destdir});
 761         my $this=abs_path($0);
 762         if (! -x $this) {
 763                 error("$this doesn't seem to be executable");
 764         }
 765
 766         if ($config{setup}) {
 767                 error("cannot create a wrapper that uses a setup file");
 768         }
 769
 770         my @params=($config{srcdir}, $config{templatedir}, $config{destdir},
 771                 "--wikiname=$config{wikiname}");
 772         push @params, "--verbose" if $config{verbose};
 773         push @params, "--rebuild" if $config{rebuild};
 774         push @params, "--nosvn" if !$config{svn};
 775         push @params, "--cgi" if $config{cgi};
 776         push @params, "--url=$config{url}" if length $config{url};
 777         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 778         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 779         push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
 780         push @params, "--anonok" if $config{anonok};
 781         my $params=join(" ", @params);
 782         my $call='';
 783         foreach my $p ($this, $this, @params) {
 784                 $call.=qq{"$p", };
 785         }
 786         $call.="NULL";
 787
 788         my @envsave;
 789         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 790                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 791                        HTTP_COOKIE} if $config{cgi};
 792         my $envsave="";
 793         foreach my $var (@envsave) {
 794                 $envsave.=<<"EOF"
 795         if ((s=getenv("$var")))
 796                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 797 EOF
 798         }
 799
 800         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 801         print OUT <<"EOF";
 802 /* A wrapper for ikiwiki, can be safely made suid. */
 803 #define _GNU_SOURCE
 804 #include <stdio.h>
 805 #include <unistd.h>
 806 #include <stdlib.h>
 807 #include <string.h>
 808
 809 extern char **environ;
 810
 811 int main (int argc, char **argv) {
 812         /* Sanitize environment. */
 813         char *s;
 814         char *newenviron[$#envsave+3];
 815         int i=0;
 816 $envsave
 817         newenviron[i++]="HOME=$ENV{HOME}";
 818         newenviron[i]=NULL;
 819         environ=newenviron;
 820
 821         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 822                 printf("$params\\n");
 823                 exit(0);
 824         }
 825
 826         execl($call);
 827         perror("failed to run $this");
 828         exit(1);
 829 }
 830 EOF
 831         close OUT;
 832         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 833                 error("failed to compile ikiwiki-wrap.c");
 834         }
 835         unlink("ikiwiki-wrap.c");
 836         if (defined $config{wrappermode} &&
 837             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 838                 error("chmod $config{wrapper}: $!");
 839         }
 840         print "successfully generated $config{wrapper}\n";
 841 } #}}}
 842
 843 sub misctemplate ($$) { #{{{
 844         my $title=shift;
 845         my $pagebody=shift;
 846
 847         my $template=HTML::Template->new(
 848                 filename => "$config{templatedir}/misc.tmpl"
 849         );
 850         $template->param(
 851                 title => $title,
 852                 indexlink => indexlink(),
 853                 wikiname => $config{wikiname},
 854                 pagebody => $pagebody,
 855         );
 856         return $template->output;
 857 }#}}}
 858
 859 sub cgi_recentchanges ($) { #{{{
 860         my $q=shift;
 861
 862         my $template=HTML::Template->new(
 863                 filename => "$config{templatedir}/recentchanges.tmpl"
 864         );
 865         $template->param(
 866                 title => "RecentChanges",
 867                 indexlink => indexlink(),
 868                 wikiname => $config{wikiname},
 869                 changelog => [rcs_recentchanges(100)],
 870         );
 871         print $q->header, $template->output;
 872 } #}}}
 873
 874 sub userinfo_get ($$) { #{{{
 875         my $user=shift;
 876         my $field=shift;
 877
 878         eval q{use Storable};
 879         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 880         if (! defined $userdata || ! ref $userdata ||
 881             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 882                 return "";
 883         }
 884         return $userdata->{$user}->{$field};
 885 } #}}}
 886
 887 sub userinfo_set ($$$) { #{{{
 888         my $user=shift;
 889         my $field=shift;
 890         my $value=shift;
 891
 892         eval q{use Storable};
 893         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 894         if (! defined $userdata || ! ref $userdata ||
 895             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 896                 return "";
 897         }
 898
 899         $userdata->{$user}->{$field}=$value;
 900         my $oldmask=umask(077);
 901         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 902         umask($oldmask);
 903         return $ret;
 904 } #}}}
 905
 906 sub userinfo_setall ($$) { #{{{
 907         my $user=shift;
 908         my $info=shift;
 909
 910         eval q{use Storable};
 911         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 912         if (! defined $userdata || ! ref $userdata) {
 913                 $userdata={};
 914         }
 915         $userdata->{$user}=$info;
 916         my $oldmask=umask(077);
 917         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 918         umask($oldmask);
 919         return $ret;
 920 } #}}}
 921
 922 sub cgi_signin ($$) { #{{{
 923         my $q=shift;
 924         my $session=shift;
 925
 926         eval q{use CGI::FormBuilder};
 927         my $form = CGI::FormBuilder->new(
 928                 title => "signin",
 929                 fields => [qw(do page from name password confirm_password email)],
 930                 header => 1,
 931                 method => 'POST',
 932                 validate => {
 933                         confirm_password => {
 934                                 perl => q{eq $form->field("password")},
 935                         },
 936                         email => 'EMAIL',
 937                 },
 938                 required => 'NONE',
 939                 javascript => 0,
 940                 params => $q,
 941                 action => $q->request_uri,
 942                 header => 0,
 943                 template => (-e "$config{templatedir}/signin.tmpl" ?
 944                               "$config{templatedir}/signin.tmpl" : "")
 945         );
 946
 947         $form->field(name => "name", required => 0);
 948         $form->field(name => "do", type => "hidden");
 949         $form->field(name => "page", type => "hidden");
 950         $form->field(name => "from", type => "hidden");
 951         $form->field(name => "password", type => "password", required => 0);
 952         $form->field(name => "confirm_password", type => "password", required => 0);
 953         $form->field(name => "email", required => 0);
 954         if ($q->param("do") ne "signin") {
 955                 $form->text("You need to log in first.");
 956         }
 957
 958         if ($form->submitted) {
 959                 # Set required fields based on how form was submitted.
 960                 my %required=(
 961                         "Login" => [qw(name password)],
 962                         "Register" => [qw(name password confirm_password email)],
 963                         "Mail Password" => [qw(name)],
 964                 );
 965                 foreach my $opt (@{$required{$form->submitted}}) {
 966                         $form->field(name => $opt, required => 1);
 967                 }
 968
 969                 # Validate password differently depending on how
 970                 # form was submitted.
 971                 if ($form->submitted eq 'Login') {
 972                         $form->field(
 973                                 name => "password",
 974                                 validate => sub {
 975                                         length $form->field("name") &&
 976                                         shift eq userinfo_get($form->field("name"), 'password');
 977                                 },
 978                         );
 979                         $form->field(name => "name", validate => '/^\w+$/');
 980                 }
 981                 else {
 982                         $form->field(name => "password", validate => 'VALUE');
 983                 }
 984                 # And make sure the entered name exists when logging
 985                 # in or sending email, and does not when registering.
 986                 if ($form->submitted eq 'Register') {
 987                         $form->field(
 988                                 name => "name",
 989                                 validate => sub {
 990                                         my $name=shift;
 991                                         length $name &&
 992                                         ! userinfo_get($name, "regdate");
 993                                 },
 994                         );
 995                 }
 996                 else {
 997                         $form->field(
 998                                 name => "name",
 999                                 validate => sub {
1000                                         my $name=shift;
1001                                         length $name &&
1002                                         userinfo_get($name, "regdate");
1003                                 },
1004                         );
1005                 }
1006         }
1007         else {
1008                 # First time settings.
1009                 $form->field(name => "name", comment => "use FirstnameLastName");
1010                 $form->field(name => "confirm_password", comment => "(only needed");
1011                 $form->field(name => "email",            comment => "for registration)");
1012                 if ($session->param("name")) {
1013                         $form->field(name => "name", value => $session->param("name"));
1014                 }
1015         }
1016
1017         if ($form->submitted && $form->validate) {
1018                 if ($form->submitted eq 'Login') {
1019                         $session->param("name", $form->field("name"));
1020                         if (defined $form->field("do") &&
1021                             $form->field("do") ne 'signin') {
1022                                 print $q->redirect(
1023                                         "$config{cgiurl}?do=".$form->field("do").
1024                                         "&page=".$form->field("page").
1025                                         "&from=".$form->field("from"));;
1026                         }
1027                         else {
1028                                 print $q->redirect($config{url});
1029                         }
1030                 }
1031                 elsif ($form->submitted eq 'Register') {
1032                         my $user_name=$form->field('name');
1033                         if (userinfo_setall($user_name, {
1034                                            'email' => $form->field('email'),
1035                                            'password' => $form->field('password'),
1036                                            'regdate' => time
1037                                          })) {
1038                                 $form->field(name => "confirm_password", type => "hidden");
1039                                 $form->field(name => "email", type => "hidden");
1040                                 $form->text("Registration successful. Now you can Login.");
1041                                 print $session->header();
1042                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
1043                         }
1044                         else {
1045                                 error("Error saving registration.");
1046                         }
1047                 }
1048                 elsif ($form->submitted eq 'Mail Password') {
1049                         my $user_name=$form->field("name");
1050                         my $template=HTML::Template->new(
1051                                 filename => "$config{templatedir}/passwordmail.tmpl"
1052                         );
1053                         $template->param(
1054                                 user_name => $user_name,
1055                                 user_password => userinfo_get($user_name, "password"),
1056                                 wikiurl => $config{url},
1057                                 wikiname => $config{wikiname},
1058                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
1059                         );
1060
1061                         eval q{use Mail::Sendmail};
1062                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
1063                         sendmail(
1064                                 To => userinfo_get($user_name, "email"),
1065                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
1066                                 Subject => "$config{wikiname} information",
1067                                 Message => $template->output,
1068                         ) or error("Failed to send mail");
1069
1070                         $form->text("Your password has been emailed to you.");
1071                         $form->field(name => "name", required => 0);
1072                         print $session->header();
1073                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1074                 }
1075         }
1076         else {
1077                 print $session->header();
1078                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1079         }
1080 } #}}}
1081
1082 sub cgi_prefs ($$) { #{{{
1083         my $q=shift;
1084         my $session=shift;
1085
1086         eval q{use CGI::FormBuilder};
1087         my $form = CGI::FormBuilder->new(
1088                 title => "preferences",
1089                 fields => [qw(do name password confirm_password email)],
1090                 header => 0,
1091                 method => 'POST',
1092                 validate => {
1093                         confirm_password => {
1094                                 perl => q{eq $form->field("password")},
1095                         },
1096                         email => 'EMAIL',
1097                 },
1098                 required => 'NONE',
1099                 javascript => 0,
1100                 params => $q,
1101                 action => $q->request_uri,
1102                 template => (-e "$config{templatedir}/prefs.tmpl" ?
1103                               "$config{templatedir}/prefs.tmpl" : "")
1104         );
1105         my @buttons=("Save Preferences", "Logout", "Cancel");
1106
1107         my $user_name=$session->param("name");
1108         $form->field(name => "do", type => "hidden");
1109         $form->field(name => "name", disabled => 1,
1110                 value => $user_name, force => 1);
1111         $form->field(name => "password", type => "password");
1112         $form->field(name => "confirm_password", type => "password");
1113
1114         if (! $form->submitted) {
1115                 $form->field(name => "email", value => userinfo_get($user_name, "email"));
1116         }
1117
1118         if ($form->submitted eq 'Logout') {
1119                 $session->delete();
1120                 print $q->redirect($config{url});
1121                 return;
1122         }
1123         elsif ($form->submitted eq 'Cancel') {
1124                 print $q->redirect($config{url});
1125                 return;
1126         }
1127         elsif ($form->submitted eq "Save Preferences" && $form->validate) {
1128                 foreach my $field (qw(password email)) {
1129                         if (length $form->field($field)) {
1130                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
1131                         }
1132                 }
1133                 $form->text("Preferences saved.");
1134         }
1135
1136         print $session->header();
1137         print misctemplate($form->title, $form->render(submit => \@buttons));
1138 } #}}}
1139
1140 sub cgi_editpage ($$) { #{{{
1141         my $q=shift;
1142         my $session=shift;
1143
1144         eval q{use CGI::FormBuilder};
1145         my $form = CGI::FormBuilder->new(
1146                 fields => [qw(do rcsinfo from page content comments)],
1147                 header => 1,
1148                 method => 'POST',
1149                 validate => {
1150                         content => '/.+/',
1151                 },
1152                 required => [qw{content}],
1153                 javascript => 0,
1154                 params => $q,
1155                 action => $q->request_uri,
1156                 table => 0,
1157                 template => "$config{templatedir}/editpage.tmpl"
1158         );
1159         my @buttons=("Save Page", "Preview", "Cancel");
1160
1161         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1162         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1163             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1164                 error("bad page name");
1165         }
1166         $page=lc($page);
1167
1168         my $file=$page.$config{default_pageext};
1169         my $newfile=1;
1170         if (exists $pagesources{lc($page)}) {
1171                 $file=$pagesources{lc($page)};
1172                 $newfile=0;
1173         }
1174
1175         $form->field(name => "do", type => 'hidden');
1176         $form->field(name => "from", type => 'hidden');
1177         $form->field(name => "rcsinfo", type => 'hidden');
1178         $form->field(name => "page", value => "$page", force => 1);
1179         $form->field(name => "comments", type => "text", size => 80);
1180         $form->field(name => "content", type => "textarea", rows => 20,
1181                 cols => 80);
1182         $form->tmpl_param("can_commit", $config{svn});
1183         $form->tmpl_param("indexlink", indexlink());
1184         $form->tmpl_param("helponformattinglink",
1185                 htmllink("", "HelpOnFormatting", 1));
1186         if (! $form->submitted) {
1187                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1188                         force => 1);
1189         }
1190
1191         if ($form->submitted eq "Cancel") {
1192                 print $q->redirect("$config{url}/".htmlpage($page));
1193                 return;
1194         }
1195         elsif ($form->submitted eq "Preview") {
1196                 $form->tmpl_param("page_preview",
1197                         htmlize($config{default_pageext},
1198                                 linkify($form->field('content'), $page)));
1199         }
1200         else {
1201                 $form->tmpl_param("page_preview", "");
1202         }
1203         $form->tmpl_param("page_conflict", "");
1204
1205         if (! $form->submitted || $form->submitted eq "Preview" ||
1206             ! $form->validate) {
1207                 if ($form->field("do") eq "create") {
1208                         if (exists $pagesources{lc($page)}) {
1209                                 # hmm, someone else made the page in the
1210                                 # meantime?
1211                                 print $q->redirect("$config{url}/".htmlpage($page));
1212                                 return;
1213                         }
1214
1215                         my @page_locs;
1216                         my $best_loc;
1217                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1218                         if (! defined $from || ! length $from ||
1219                             $from ne $form->param('from') ||
1220                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1221                                 @page_locs=$best_loc=$page;
1222                         }
1223                         else {
1224                                 my $dir=$from."/";
1225                                 $dir=~s![^/]+/$!!;
1226
1227                                 if ($page eq 'discussion') {
1228                                         $best_loc="$from/$page";
1229                                 }
1230                                 else {
1231                                         $best_loc=$dir.$page;
1232                                 }
1233
1234                                 push @page_locs, $dir.$page;
1235                                 push @page_locs, "$from/$page";
1236                                 while (length $dir) {
1237                                         $dir=~s![^/]+/$!!;
1238                                         push @page_locs, $dir.$page;
1239                                 }
1240
1241                                 @page_locs = grep { ! exists
1242                                         $pagesources{lc($_)} } @page_locs;
1243                         }
1244
1245                         $form->tmpl_param("page_select", 1);
1246                         $form->field(name => "page", type => 'select',
1247                                 options => \@page_locs, value => $best_loc);
1248                         $form->title("creating $page");
1249                 }
1250                 elsif ($form->field("do") eq "edit") {
1251                         if (! defined $form->field('content') ||
1252                             ! length $form->field('content')) {
1253                                 my $content="";
1254                                 if (exists $pagesources{lc($page)}) {
1255                                                 $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1256                                         $content=~s/\n/\r\n/g;
1257                                 }
1258                                 $form->field(name => "content", value => $content,
1259                                         force => 1);
1260                         }
1261                         $form->tmpl_param("page_select", 0);
1262                         $form->field(name => "page", type => 'hidden');
1263                         $form->title("editing $page");
1264                 }
1265
1266                 print $form->render(submit => \@buttons);
1267         }
1268         else {
1269                 # save page
1270                 my $content=$form->field('content');
1271                 $content=~s/\r\n/\n/g;
1272                 $content=~s/\r/\n/g;
1273                 writefile("$config{srcdir}/$file", $content);
1274
1275                 my $message="web commit ";
1276                 if ($session->param("name")) {
1277                         $message.="by ".$session->param("name");
1278                 }
1279                 else {
1280                         $message.="from $ENV{REMOTE_ADDR}";
1281                 }
1282                 if (defined $form->field('comments') &&
1283                     length $form->field('comments')) {
1284                         $message.=": ".$form->field('comments');
1285                 }
1286
1287                 if ($config{svn}) {
1288                         if ($newfile) {
1289                                 rcs_add($file);
1290                         }
1291                         # prevent deadlock with post-commit hook
1292                         unlockwiki();
1293                         # presumably the commit will trigger an update
1294                         # of the wiki
1295                         my $conflict=rcs_commit($file, $message,
1296                                 $form->field("rcsinfo"));
1297
1298                         if (defined $conflict) {
1299                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1300                                         force => 1);
1301                                 $form->tmpl_param("page_conflict", 1);
1302                                 $form->field("content", value => $conflict, force => 1);
1303                                 $form->field("do", "edit)");
1304                                 $form->tmpl_param("page_select", 0);
1305                                 $form->field(name => "page", type => 'hidden');
1306                                 $form->title("editing $page");
1307                                 print $form->render(submit => \@buttons);
1308                                 return;
1309                         }
1310                 }
1311                 else {
1312                         loadindex();
1313                         refresh();
1314                         saveindex();
1315                 }
1316
1317                 # The trailing question mark tries to avoid broken
1318                 # caches and get the most recent version of the page.
1319                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1320         }
1321 } #}}}
1322
1323 sub cgi () { #{{{
1324         eval q{use CGI};
1325         eval q{use CGI::Session};
1326
1327         my $q=CGI->new;
1328
1329         my $do=$q->param('do');
1330         if (! defined $do || ! length $do) {
1331                 error("\"do\" parameter missing");
1332         }
1333
1334         # This does not need a session.
1335         if ($do eq 'recentchanges') {
1336                 cgi_recentchanges($q);
1337                 return;
1338         }
1339
1340         CGI::Session->name("ikiwiki_session");
1341
1342         my $oldmask=umask(077);
1343         my $session = CGI::Session->new("driver:db_file", $q,
1344                 { FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
1345         umask($oldmask);
1346
1347         # Everything below this point needs the user to be signed in.
1348         if ((! $config{anonok} && ! defined $session->param("name") ||
1349              ! defined $session->param("name") ||
1350              ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1351                 cgi_signin($q, $session);
1352
1353                 # Force session flush with safe umask.
1354                 my $oldmask=umask(077);
1355                 $session->flush;
1356                 umask($oldmask);
1357
1358                 return;
1359         }
1360
1361         if ($do eq 'create' || $do eq 'edit') {
1362                 cgi_editpage($q, $session);
1363         }
1364         elsif ($do eq 'prefs') {
1365                 cgi_prefs($q, $session);
1366         }
1367         else {
1368                 error("unknown do parameter");
1369         }
1370 } #}}}
1371
1372 sub setup () { # {{{
1373         my $setup=possibly_foolish_untaint($config{setup});
1374         delete $config{setup};
1375         open (IN, $setup) || error("read $setup: $!\n");
1376         local $/=undef;
1377         my $code=<IN>;
1378         ($code)=$code=~/(.*)/s;
1379         close IN;
1380
1381         eval $code;
1382         error($@) if $@;
1383         exit;
1384 } #}}}
1385
1386 # main {{{
1387 setup() if $config{setup};
1388 lockwiki();
1389 if ($config{wrapper}) {
1390         gen_wrapper(%config);
1391         exit;
1392 }
1393 memoize('pagename');
1394 memoize('bestlink');
1395 loadindex() unless $config{rebuild};
1396 if ($config{cgi}) {
1397         cgi();
1398 }
1399 else {
1400         rcs_update() if $config{svn};
1401         refresh();
1402         saveindex();
1403 }
1404 #}}}