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