ikiwiki

   1 #!/usr/bin/perl -T
   2
   3 use warnings;
   4 use strict;
   5 use File::Find;
   6 use Memoize;
   7 use File::Spec;
   8 use HTML::Template;
   9
  10 BEGIN {
  11         $blosxom::version="is a proper perl module too much to ask?";
  12         do "/usr/bin/markdown";
  13 }
  14
  15 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
  16 my ($srcdir, $templatedir, $destdir, %links, %oldlinks, %oldpagemtime,
  17     %renderedfiles, %pagesources);
  18 my $wiki_link_regexp=qr/\[\[([^\s]+)\]\]/;
  19 my $wiki_file_regexp=qr/(^[-A-Za-z0-9_.:\/+]+$)/;
  20 my $wiki_file_prune_regexp=qr!((^|/).svn/|\.\.|^\.|\/\.|\.html?$)!;
  21 my $verbose=0;
  22 my $wikiname="wiki";
  23 my $default_pagetype=".mdwn";
  24 my $cgi=0;
  25 my $url="";
  26 my $cgiurl="";
  27 my $historyurl="";
  28 my $svn=1;
  29 my $anonok=0;
  30
  31 sub usage { #{{{
  32         die "usage: ikiwiki [options] source templates dest\n";
  33 } #}}}
  34
  35 sub error ($) { #{{{
  36         if ($cgi) {
  37                 print "Content-type: text/html\n\n";
  38                 print "Error: @_\n";
  39                 exit 1;
  40         }
  41         else {
  42                 die @_;
  43         }
  44 } #}}}
  45
  46 sub debug ($) { #{{{
  47         print "@_\n" if $verbose;
  48 } #}}}
  49
  50 sub mtime ($) { #{{{
  51         my $page=shift;
  52
  53         return (stat($page))[9];
  54 } #}}}
  55
  56 sub possibly_foolish_untaint ($) { #{{{
  57         my $tainted=shift;
  58         my ($untainted)=$tainted=~/(.*)/;
  59         return $untainted;
  60 } #}}}
  61
  62 sub basename ($) { #{{{
  63         my $file=shift;
  64
  65         $file=~s!.*/!!;
  66         return $file;
  67 } #}}}
  68
  69 sub dirname ($) { #{{{
  70         my $file=shift;
  71
  72         $file=~s!/?[^/]+$!!;
  73         return $file;
  74 } #}}}
  75
  76 sub pagetype ($) { #{{{
  77         my $page=shift;
  78
  79         if ($page =~ /\.mdwn$/) {
  80                 return ".mdwn";
  81         }
  82         else {
  83                 return "unknown";
  84         }
  85 } #}}}
  86
  87 sub pagename ($) { #{{{
  88         my $file=shift;
  89
  90         my $type=pagetype($file);
  91         my $page=$file;
  92         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
  93         return $page;
  94 } #}}}
  95
  96 sub htmlpage ($) { #{{{
  97         my $page=shift;
  98
  99         return $page.".html";
 100 } #}}}
 101
 102 sub readfile ($) { #{{{
 103         my $file=shift;
 104
 105         local $/=undef;
 106         open (IN, "$file") || error("failed to read $file: $!");
 107         my $ret=<IN>;
 108         close IN;
 109         return $ret;
 110 } #}}}
 111
 112 sub writefile ($$) { #{{{
 113         my $file=shift;
 114         my $content=shift;
 115
 116         my $dir=dirname($file);
 117         if (! -d $dir) {
 118                 my $d="";
 119                 foreach my $s (split(m!/+!, $dir)) {
 120                         $d.="$s/";
 121                         if (! -d $d) {
 122                                 mkdir($d) || error("failed to create directory $d: $!");
 123                         }
 124                 }
 125         }
 126
 127         open (OUT, ">$file") || error("failed to write $file: $!");
 128         print OUT $content;
 129         close OUT;
 130 } #}}}
 131
 132 sub findlinks ($) { #{{{
 133         my $content=shift;
 134
 135         my @links;
 136         while ($content =~ /$wiki_link_regexp/g) {
 137                 push @links, lc($1);
 138         }
 139         return @links;
 140 } #}}}
 141
 142 # Given a page and the text of a link on the page, determine which existing
 143 # page that link best points to. Prefers pages under a subdirectory with
 144 # the same name as the source page, failing that goes down the directory tree
 145 # to the base looking for matching pages.
 146 sub bestlink ($$) { #{{{
 147         my $page=shift;
 148         my $link=lc(shift);
 149
 150         my $cwd=$page;
 151         do {
 152                 my $l=$cwd;
 153                 $l.="/" if length $l;
 154                 $l.=$link;
 155
 156                 if (exists $links{$l}) {
 157                         #debug("for $page, \"$link\", use $l");
 158                         return $l;
 159                 }
 160         } while $cwd=~s!/?[^/]+$!!;
 161
 162         #print STDERR "warning: page $page, broken link: $link\n";
 163         return "";
 164 } #}}}
 165
 166 sub isinlinableimage ($) { #{{{
 167         my $file=shift;
 168
 169         $file=~/\.(png|gif|jpg|jpeg)$/;
 170 } #}}}
 171
 172 sub htmllink { #{{{
 173         my $page=shift;
 174         my $link=shift;
 175         my $noimagelink=shift;
 176
 177         my $bestlink=bestlink($page, $link);
 178
 179         return $link if $page eq $bestlink;
 180
 181         # TODO BUG: %renderedfiles may not have it, if the linked to page
 182         # was also added and isn't yet rendered! Note that this bug is
 183         # masked by the bug mentioned below that makes all new files
 184         # be rendered twice.
 185         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 186                 $bestlink=htmlpage($bestlink);
 187         }
 188         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 189                 return "<a href=\"$cgiurl?do=create&page=$link&from=$page\">?</a>$link"
 190         }
 191
 192         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 193
 194         if (! $noimagelink && isinlinableimage($bestlink)) {
 195                 return "<img src=\"$bestlink\">";
 196         }
 197         return "<a href=\"$bestlink\">$link</a>";
 198 } #}}}
 199
 200 sub linkify ($$) { #{{{
 201         my $content=shift;
 202         my $file=shift;
 203
 204         $content =~ s/$wiki_link_regexp/htmllink(pagename($file), $1)/eg;
 205
 206         return $content;
 207 } #}}}
 208
 209 sub htmlize ($$) { #{{{
 210         my $type=shift;
 211         my $content=shift;
 212
 213         if ($type eq '.mdwn') {
 214                 return Markdown::Markdown($content);
 215         }
 216         else {
 217                 error("htmlization of $type not supported");
 218         }
 219 } #}}}
 220
 221 sub backlinks ($) { #{{{
 222         my $page=shift;
 223
 224         my @links;
 225         foreach my $p (keys %links) {
 226                 next if bestlink($page, $p) eq $page;
 227                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 228                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 229
 230                         # Trim common dir prefixes from both pages.
 231                         my $p_trimmed=$p;
 232                         my $page_trimmed=$page;
 233                         my $dir;
 234                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 235                                 defined $dir &&
 236                                 $p_trimmed=~s/^\Q$dir\E// &&
 237                                 $page_trimmed=~s/^\Q$dir\E//;
 238
 239                         push @links, { url => $href, page => $p_trimmed };
 240                 }
 241         }
 242
 243         return @links;
 244 } #}}}
 245
 246 sub parentlinks ($) { #{{{
 247         my $page=shift;
 248
 249         my @ret;
 250         my $pagelink="";
 251         my $path="";
 252         my $skip=1;
 253         foreach my $dir (reverse split("/", $page)) {
 254                 if (! $skip) {
 255                         unshift @ret, { url => "$path$dir.html", page => $dir };
 256                 }
 257                 else {
 258                         $skip=0;
 259                 }
 260                 $path.="../";
 261         }
 262         return @ret;
 263 } #}}}
 264
 265 sub indexlink () { #{{{
 266         return "<a href=\"$url\">$wikiname</a>/ ";
 267 } #}}}
 268
 269 sub finalize ($$) { #{{{
 270         my $content=shift;
 271         my $page=shift;
 272
 273         my $title=basename($page);
 274         $title=~s/_/ /g;
 275
 276         my $template=HTML::Template->new(blind_cache => 1,
 277                 filename => "$templatedir/page.tmpl");
 278
 279         if (length $cgiurl) {
 280                 $template->param(editurl => "$cgiurl?do=edit&page=$page");
 281                 $template->param(recentchangesurl => "$cgiurl?do=recentchanges");
 282         }
 283
 284         if (length $historyurl) {
 285                 my $u=$historyurl;
 286                 $u=~s/\[\[\]\]/$pagesources{$page}/g;
 287                 $template->param(historyurl => $u);
 288         }
 289
 290         $template->param(
 291                 title => $title,
 292                 indexlink => $url,
 293                 wikiname => $wikiname,
 294                 parentlinks => [parentlinks($page)],
 295                 content => $content,
 296                 backlinks => [backlinks($page)],
 297         );
 298
 299         return $template->output;
 300 } #}}}
 301
 302 sub render ($) { #{{{
 303         my $file=shift;
 304
 305         my $type=pagetype($file);
 306         my $content=readfile("$srcdir/$file");
 307         if ($type ne 'unknown') {
 308                 my $page=pagename($file);
 309
 310                 $links{$page}=[findlinks($content)];
 311
 312                 $content=linkify($content, $file);
 313                 $content=htmlize($type, $content);
 314                 $content=finalize($content, $page);
 315
 316                 writefile("$destdir/".htmlpage($page), $content);
 317                 $oldpagemtime{$page}=time;
 318                 $renderedfiles{$page}=htmlpage($page);
 319         }
 320         else {
 321                 $links{$file}=[];
 322                 writefile("$destdir/$file", $content);
 323                 $oldpagemtime{$file}=time;
 324                 $renderedfiles{$file}=$file;
 325         }
 326 } #}}}
 327
 328 sub loadindex () { #{{{
 329         open (IN, "$srcdir/.ikiwiki/index") || return;
 330         while (<IN>) {
 331                 $_=possibly_foolish_untaint($_);
 332                 chomp;
 333                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 334                 my $page=pagename($file);
 335                 $pagesources{$page}=$file;
 336                 $oldpagemtime{$page}=$mtime;
 337                 $oldlinks{$page}=[@links];
 338                 $links{$page}=[@links];
 339                 $renderedfiles{$page}=$rendered;
 340         }
 341         close IN;
 342 } #}}}
 343
 344 sub saveindex () { #{{{
 345         if (! -d "$srcdir/.ikiwiki") {
 346                 mkdir("$srcdir/.ikiwiki");
 347         }
 348         open (OUT, ">$srcdir/.ikiwiki/index") || error("cannot write to index: $!");
 349         foreach my $page (keys %oldpagemtime) {
 350                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 351                         join(" ", @{$links{$page}})."\n"
 352                                 if $oldpagemtime{$page};
 353         }
 354         close OUT;
 355 } #}}}
 356
 357 sub rcs_update () { #{{{
 358         if (-d "$srcdir/.svn") {
 359                 if (system("svn", "update", "--quiet", $srcdir) != 0) {
 360                         warn("svn update failed\n");
 361                 }
 362         }
 363 } #}}}
 364
 365 sub rcs_commit ($) { #{{{
 366         my $message=shift;
 367
 368         if (-d "$srcdir/.svn") {
 369                 if (system("svn", "commit", "--quiet", "-m",
 370                            possibly_foolish_untaint($message), $srcdir) != 0) {
 371                         warn("svn commit failed\n");
 372                 }
 373         }
 374 } #}}}
 375
 376 sub rcs_add ($) { #{{{
 377         my $file=shift;
 378
 379         if (-d "$srcdir/.svn") {
 380                 my $parent=dirname($file);
 381                 while (! -d "$srcdir/$parent/.svn") {
 382                         $file=$parent;
 383                         $parent=dirname($file);
 384                 }
 385
 386                 if (system("svn", "add", "--quiet", "$srcdir/$file") != 0) {
 387                         warn("svn add failed\n");
 388                 }
 389         }
 390 } #}}}
 391
 392 sub rcs_recentchanges ($) { #{{{
 393         my $num=shift;
 394         my @ret;
 395
 396         eval q{use Date::Parse};
 397         eval q{use Time::Duration};
 398
 399         if (-d "$srcdir/.svn") {
 400                 my $info=`LANG=C svn info $srcdir`;
 401                 my ($svn_url)=$info=~/^URL: (.*)$/m;
 402
 403                 # FIXME: currently assumes that the wiki is somewhere
 404                 # under trunk in svn, doesn't support other layouts.
 405                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 406
 407                 my $div=qr/^--------------------+$/;
 408                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 409                 my $state='start';
 410                 my ($rev, $user, $when, @pages, @message);
 411                 foreach (`LANG=C svn log -v '$svn_url'`) {
 412                         chomp;
 413                         if ($state eq 'start' && /$div/) {
 414                                 $state='header';
 415                         }
 416                         elsif ($state eq 'header' && /$infoline/) {
 417                                 $rev=$1;
 418                                 $user=$2;
 419                                 $when=concise(ago(time - str2time($3)));
 420                         }
 421                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/(.+)$/) {
 422                                 push @pages, { link => htmllink("", pagename($1), 1) }
 423                                         if length $1;
 424                         }
 425                         elsif ($state eq 'header' && /^$/) {
 426                                 $state='body';
 427                         }
 428                         elsif ($state eq 'body' && /$div/) {
 429                                 push @ret, { rev => $rev, user => $user,
 430                                         when => $when, message => [@message],
 431                                         pages => [@pages] } if @pages;
 432                                 return @ret if @ret >= $num;
 433
 434                                 $state='header';
 435                                 $rev=$user=$when=undef;
 436                                 @pages=@message=();
 437                         }
 438                         elsif ($state eq 'body') {
 439                                 push @message, {line => $_},
 440                         }
 441                 }
 442         }
 443
 444         return @ret;
 445 } #}}}
 446
 447 sub prune ($) { #{{{
 448         my $file=shift;
 449
 450         unlink($file);
 451         my $dir=dirname($file);
 452         while (rmdir($dir)) {
 453                 $dir=dirname($dir);
 454         }
 455 } #}}}
 456
 457 sub refresh () { #{{{
 458         # Find existing pages.
 459         my %exists;
 460         my @files;
 461         find({
 462                 no_chdir => 1,
 463                 wanted => sub {
 464                         if (/$wiki_file_prune_regexp/) {
 465                                 $File::Find::prune=1;
 466                         }
 467                         elsif (! -d $_) {
 468                                 my ($f)=/$wiki_file_regexp/; # untaint
 469                                 if (! defined $f) {
 470                                         warn("skipping bad filename $_\n");
 471                                 }
 472                                 else {
 473                                         $f=~s/^\Q$srcdir\E\/?//;
 474                                         push @files, $f;
 475                                         $exists{pagename($f)}=1;
 476                                 }
 477                         }
 478                 },
 479         }, $srcdir);
 480
 481         my %rendered;
 482
 483         # check for added or removed pages
 484         my @add;
 485         foreach my $file (@files) {
 486                 my $page=pagename($file);
 487                 if (! $oldpagemtime{$page}) {
 488                         debug("new page $page");
 489                         push @add, $file;
 490                         $links{$page}=[];
 491                         $pagesources{$page}=$file;
 492                 }
 493         }
 494         my @del;
 495         foreach my $page (keys %oldpagemtime) {
 496                 if (! $exists{$page}) {
 497                         debug("removing old page $page");
 498                         push @del, $renderedfiles{$page};
 499                         prune($destdir."/".$renderedfiles{$page});
 500                         delete $renderedfiles{$page};
 501                         $oldpagemtime{$page}=0;
 502                         delete $pagesources{$page};
 503                 }
 504         }
 505
 506         # render any updated files
 507         foreach my $file (@files) {
 508                 my $page=pagename($file);
 509
 510                 if (! exists $oldpagemtime{$page} ||
 511                     mtime("$srcdir/$file") > $oldpagemtime{$page}) {
 512                         debug("rendering changed file $file");
 513                         render($file);
 514                         $rendered{$file}=1;
 515                 }
 516         }
 517
 518         # if any files were added or removed, check to see if each page
 519         # needs an update due to linking to them
 520         # TODO: inefficient; pages may get rendered above and again here;
 521         # problem is the bestlink may have changed and we won't know until
 522         # now
 523         if (@add || @del) {
 524 FILE:           foreach my $file (@files) {
 525                         my $page=pagename($file);
 526                         foreach my $f (@add, @del) {
 527                                 my $p=pagename($f);
 528                                 foreach my $link (@{$links{$page}}) {
 529                                         if (bestlink($page, $link) eq $p) {
 530                                                 debug("rendering $file, which links to $p");
 531                                                 render($file);
 532                                                 $rendered{$file}=1;
 533                                                 next FILE;
 534                                         }
 535                                 }
 536                         }
 537                 }
 538         }
 539
 540         # handle backlinks; if a page has added/removed links, update the
 541         # pages it links to
 542         # TODO: inefficient; pages may get rendered above and again here;
 543         # problem is the backlinks could be wrong in the first pass render
 544         # above
 545         if (%rendered) {
 546                 my %linkchanged;
 547                 foreach my $file (keys %rendered, @del) {
 548                         my $page=pagename($file);
 549                         if (exists $links{$page}) {
 550                                 foreach my $link (@{$links{$page}}) {
 551                                         $link=bestlink($page, $link);
 552                                         if (length $link &&
 553                                             ! exists $oldlinks{$page} ||
 554                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 555                                                 $linkchanged{$link}=1;
 556                                         }
 557                                 }
 558                         }
 559                         if (exists $oldlinks{$page}) {
 560                                 foreach my $link (@{$oldlinks{$page}}) {
 561                                         $link=bestlink($page, $link);
 562                                         if (length $link &&
 563                                             ! exists $links{$page} ||
 564                                             ! grep { $_ eq $link } @{$links{$page}}) {
 565                                                 $linkchanged{$link}=1;
 566                                         }
 567                                 }
 568                         }
 569                 }
 570                 foreach my $link (keys %linkchanged) {
 571                         my $linkfile=$pagesources{$link};
 572                         if (defined $linkfile) {
 573                                 debug("rendering $linkfile, to update its backlinks");
 574                                 render($linkfile);
 575                         }
 576                 }
 577         }
 578 } #}}}
 579
 580 # Generates a C wrapper program for running ikiwiki in a specific way.
 581 # The wrapper may be safely made suid.
 582 sub gen_wrapper ($$) { #{{{
 583         my ($svn, $rebuild)=@_;
 584
 585         eval q{use Cwd 'abs_path'};
 586         $srcdir=abs_path($srcdir);
 587         $destdir=abs_path($destdir);
 588         my $this=abs_path($0);
 589         if (! -x $this) {
 590                 error("$this doesn't seem to be executable");
 591         }
 592
 593         my @params=($srcdir, $templatedir, $destdir, "--wikiname=$wikiname");
 594         push @params, "--verbose" if $verbose;
 595         push @params, "--rebuild" if $rebuild;
 596         push @params, "--nosvn" if !$svn;
 597         push @params, "--cgi" if $cgi;
 598         push @params, "--url=$url" if $url;
 599         push @params, "--cgiurl=$cgiurl" if $cgiurl;
 600         push @params, "--historyurl=$historyurl" if $historyurl;
 601         push @params, "--anonok" if $anonok;
 602         my $params=join(" ", @params);
 603         my $call='';
 604         foreach my $p ($this, $this, @params) {
 605                 $call.=qq{"$p", };
 606         }
 607         $call.="NULL";
 608
 609         my @envsave;
 610         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 611                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 612                        HTTP_COOKIE} if $cgi;
 613         my $envsave="";
 614         foreach my $var (@envsave) {
 615                 $envsave.=<<"EOF"
 616         if ((s=getenv("$var")))
 617                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 618 EOF
 619         }
 620
 621         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 622         print OUT <<"EOF";
 623 /* A wrapper for ikiwiki, can be safely made suid. */
 624 #define _GNU_SOURCE
 625 #include <stdio.h>
 626 #include <unistd.h>
 627 #include <stdlib.h>
 628 #include <string.h>
 629
 630 extern char **environ;
 631
 632 int main (int argc, char **argv) {
 633         /* Sanitize environment. */
 634         char *s;
 635         char *newenviron[$#envsave+3];
 636         int i=0;
 637 $envsave
 638         newenviron[i++]="HOME=$ENV{HOME}";
 639         newenviron[i]=NULL;
 640         environ=newenviron;
 641
 642         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 643                 printf("$params\\n");
 644                 exit(0);
 645         }
 646
 647         execl($call);
 648         perror("failed to run $this");
 649         exit(1);
 650 }
 651 EOF
 652         close OUT;
 653         if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
 654                 error("failed to compile ikiwiki-wrap.c");
 655         }
 656         unlink("ikiwiki-wrap.c");
 657         print "successfully generated ikiwiki-wrap\n";
 658         exit 0;
 659 } #}}}
 660
 661 sub cgi_recentchanges ($) { #{{{
 662         my $q=shift;
 663
 664         my $template=HTML::Template->new(
 665                 filename => "$templatedir/recentchanges.tmpl");
 666         $template->param(
 667                 title => "RecentChanges",
 668                 indexlink => $url,
 669                 wikiname => $wikiname,
 670                 changelog => [rcs_recentchanges(100)],
 671         );
 672         print $q->header, $template->output;
 673 } #}}}
 674
 675 sub cgi_signin ($$) { #{{{
 676         my $q=shift;
 677         my $session=shift;
 678
 679         eval q{use CGI::FormBuilder};
 680         my $form = CGI::FormBuilder->new(
 681                 title => "$wikiname signin",
 682                 fields => [qw(do page name password confirm_password email)],
 683                 header => 1,
 684                 method => 'POST',
 685                 validate => {
 686                         name => '/^\w+$/',
 687                         confirm_password => {
 688                                 perl => q{eq $form->field("password")},
 689                         },
 690                         email => 'EMAIL',
 691                 },
 692                 required => 'NONE',
 693                 javascript => 0,
 694                 params => $q,
 695                 action => $q->request_uri,
 696         );
 697
 698         $form->sessionid($session->id);
 699         $form->field(name => "name", required => 0);
 700         $form->field(name => "do", type => "hidden");
 701         $form->field(name => "page", type => "hidden");
 702         $form->field(name => "password", type => "password", required => 0);
 703         $form->field(name => "confirm_password", type => "password", required => 0);
 704         $form->field(name => "email", required => 0);
 705         if ($session->param("name")) {
 706                 $form->field(name => "name", value => $session->param("name"));
 707         }
 708         if ($q->param("do") ne "signin") {
 709                 $form->text("You need to log in before you can edit pages.");
 710         }
 711
 712         if ($form->submitted) {
 713                 # Set required fields based on how form was submitted.
 714                 my %required=(
 715                         "Login" => [qw(name password)],
 716                         "Register" => [qw(name password confirm_password email)],
 717                         "Mail Password" => [qw(name)],
 718                 );
 719                 foreach my $opt (@{$required{$form->submitted}}) {
 720                         $form->field(name => $opt, required => 1);
 721                 }
 722
 723                 # Validate password differently depending on how form was
 724                 # submitted.
 725                 if ($form->submitted eq 'Login') {
 726                         $form->field(
 727                                 name => "password",
 728                                 validate => sub {
 729                                         # TODO get real user password
 730                                         shift eq "foo";
 731                                 },
 732                         );
 733                 }
 734                 else {
 735                         $form->field(name => "password", validate => 'VALUE');
 736                 }
 737         }
 738         else {
 739                 # Comments only shown first time.
 740                 $form->field(name => "name", comment => "use FirstnameLastName");
 741                 $form->field(name => "confirm_password", comment => "(only needed");
 742                 $form->field(name => "email",            comment => "for registration)");
 743         }
 744
 745         if ($form->submitted && $form->validate) {
 746                 if ($form->submitted eq 'Login') {
 747                         $session->param("name", $form->field("name"));
 748                         if (defined $form->field("do")) {
 749                                 $q->redirect(
 750                                         "$cgiurl?do=".$form->field("do").
 751                                         "&page=".$form->field("page"));
 752                         }
 753                         else {
 754                                 $q->redirect($url);
 755                         }
 756                 }
 757                 elsif ($form->submitted eq 'Register') {
 758                         # TODO: save registration info
 759                         $form->field(name => "confirm_password", type => "hidden");
 760                         $form->field(name => "email", type => "hidden");
 761                         $form->text("Registration successful. Now you can Login.");
 762                         print $form->render(submit => ["Login"]);;
 763                 }
 764                 elsif ($form->submitted eq 'Mail Password') {
 765                         # TODO mail password
 766                         $form->text("Your password has been emailed to you.");
 767                         print $form->render(submit => ["Login", "Register", "Mail Password"]);;
 768                 }
 769         }
 770         else {
 771                 print $form->render(submit => ["Login", "Register", "Mail Password"]);;
 772         }
 773 } #}}}
 774
 775 sub cgi () { #{{{
 776         eval q{use CGI};
 777         eval q{use CGI::Session};
 778
 779         my $q=CGI->new;
 780         # session id has to be _sessionid for CGI::FormBuilder to work.
 781         # TODO: stop having the formbuilder emit cookies and change session
 782         # id to something else.
 783         CGI::Session->name("_sessionid");
 784         my $session = CGI::Session->new(undef, $q,
 785                 { Directory=> "$srcdir/.ikiwiki/sessions" });
 786
 787         my $do=$q->param('do');
 788         if (! defined $do || ! length $do) {
 789                 error("\"do\" parameter missing");
 790         }
 791
 792         if ($do eq 'recentchanges') {
 793                 cgi_recentchanges($q);
 794                 return;
 795         }
 796
 797         if ((! $anonok && ! defined $session->param("name")) || $do eq 'signin') {
 798                 cgi_signin($q, $session);
 799                 return;
 800         }
 801
 802         my ($page)=$q->param('page')=~/$wiki_file_regexp/;
 803         if (! defined $page || ! length $page || $page ne $q->param('page') ||
 804             $page=~/$wiki_file_prune_regexp/ || $page=~/^\//) {
 805                 error("bad page name");
 806         }
 807         $page=lc($page);
 808
 809         my $action=$q->request_uri;
 810         $action=~s/\?.*//;
 811
 812         if ($do eq 'create') {
 813                 if (exists $pagesources{lc($page)}) {
 814                         # hmm, someone else made the page in the meantime?
 815                         print $q->redirect("$url/".htmlpage($page));
 816                 }
 817
 818                 my @page_locs;
 819                 my ($from)=$q->param('from')=~/$wiki_file_regexp/;
 820                 if (! defined $from || ! length $from ||
 821                     $from ne $q->param('from') ||
 822                     $from=~/$wiki_file_prune_regexp/ || $from=~/^\//) {
 823                         @page_locs=$page;
 824                 }
 825                 else {
 826                         my $dir=$from."/";
 827                         $dir=~s![^/]+/$!!;
 828                         push @page_locs, $dir.$page;
 829                         push @page_locs, "$from/$page";
 830                         while (length $dir) {
 831                                 $dir=~s![^/]+/$!!;
 832                                 push @page_locs, $dir.$page;
 833                         }
 834                 }
 835
 836                 $q->param("do", "save");
 837                 print $q->header,
 838                       $q->start_html("Creating $page"),
 839                       $q->h1(indexlink()." Creating $page"),
 840                       $q->start_form(-action => $action),
 841                       $q->hidden('do'),
 842                       "Select page location:",
 843                       $q->popup_menu('page', \@page_locs),
 844                       $q->textarea(-name => 'content',
 845                                -default => "",
 846                                -rows => 20,
 847                                -columns => 80),
 848                       $q->br,
 849                       "Optional comment about this change:",
 850                       $q->br,
 851                       $q->textfield(-name => "comments", -size => 80),
 852                       $q->br,
 853                       $q->submit("Save Page"),
 854                       $q->end_form,
 855                       $q->end_html;
 856         }
 857         elsif ($do eq 'edit') {
 858                 my $content="";
 859                 if (exists $pagesources{lc($page)}) {
 860                         $content=readfile("$srcdir/$pagesources{lc($page)}");
 861                         $content=~s/\n/\r\n/g;
 862                 }
 863                 $q->param("do", "save");
 864                 print $q->header,
 865                       $q->start_html("Editing $page"),
 866                       $q->h1(indexlink()." Editing $page"),
 867                       $q->start_form(-action => $action),
 868                       $q->hidden('do'),
 869                       $q->hidden('page'),
 870                       $q->textarea(-name => 'content',
 871                                -default => $content,
 872                                -rows => 20,
 873                                -columns => 80),
 874                       $q->br,
 875                       "Optional comment about this change:",
 876                       $q->br,
 877                       $q->textfield(-name => "comments", -size => 80),
 878                       $q->br,
 879                       $q->submit("Save Page"),
 880                       $q->end_form,
 881                       $q->end_html;
 882         }
 883         elsif ($do eq 'save') {
 884                 my $file=$page.$default_pagetype;
 885                 my $newfile=1;
 886                 if (exists $pagesources{lc($page)}) {
 887                         $file=$pagesources{lc($page)};
 888                         $newfile=0;
 889                 }
 890
 891                 my $content=$q->param('content');
 892                 $content=~s/\r\n/\n/g;
 893                 $content=~s/\r/\n/g;
 894                 writefile("$srcdir/$file", $content);
 895
 896                 my $message="web commit from $ENV{REMOTE_ADDR}";
 897                 if (defined $q->param('comments')) {
 898                         $message.=": ".$q->param('comments');
 899                 }
 900
 901                 if ($svn) {
 902                         if ($newfile) {
 903                                 rcs_add($file);
 904                         }
 905                         # presumably the commit will trigger an update
 906                         # of the wiki
 907                         rcs_commit($message);
 908                 }
 909                 else {
 910                         refresh();
 911                 }
 912
 913                 print $q->redirect("$url/".htmlpage($page));
 914         }
 915         else {
 916                 error("unknown do parameter");
 917         }
 918 } #}}}
 919
 920 # main {{{
 921 my $rebuild=0;
 922 my $wrapper=0;
 923 if (grep /^-/, @ARGV) {
 924         eval {use Getopt::Long};
 925         GetOptions(
 926                 "wikiname=s" => \$wikiname,
 927                 "verbose|v" => \$verbose,
 928                 "rebuild" => \$rebuild,
 929                 "wrapper" => \$wrapper,
 930                 "svn!" => \$svn,
 931                 "anonok!" => \$anonok,
 932                 "cgi" => \$cgi,
 933                 "url=s" => \$url,
 934                 "cgiurl=s" => \$cgiurl,
 935                 "historyurl=s" => \$historyurl,
 936         ) || usage();
 937 }
 938 usage() unless @ARGV == 3;
 939 ($srcdir) = possibly_foolish_untaint(shift);
 940 ($templatedir) = possibly_foolish_untaint(shift);
 941 ($destdir) = possibly_foolish_untaint(shift);
 942
 943 if ($cgi && ! length $url) {
 944         error("Must specify url to wiki with --url when using --cgi");
 945 }
 946
 947 gen_wrapper($svn, $rebuild) if $wrapper;
 948 memoize('pagename');
 949 memoize('bestlink');
 950 loadindex() unless $rebuild;
 951 if ($cgi) {
 952         cgi();
 953 }
 954 else {
 955         rcs_update() if $svn;
 956         refresh();
 957         saveindex();
 958 }
 959 #}}}