ikiwiki

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