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
   9 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
  10
  11 BEGIN {
  12         $blosxom::version="is a proper perl module too much to ask?";
  13         do "/usr/bin/markdown";
  14 }
  15
  16 my ($srcdir, $destdir, %links, %oldlinks, %oldpagemtime, %renderedfiles,
  17     %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 $svn=1;
  28
  29 sub usage {
  30         die "usage: ikiwiki [options] source dest\n";
  31 }
  32
  33 sub error ($) {
  34         if ($cgi) {
  35                 print "Content-type: text/html\n\n";
  36                 print "Error: @_\n";
  37                 exit 1;
  38         }
  39         else {
  40                 die @_;
  41         }
  42 }
  43
  44 sub debug ($) {
  45         print "@_\n" if $verbose;
  46 }
  47
  48 sub mtime ($) {
  49         my $page=shift;
  50
  51         return (stat($page))[9];
  52 }
  53
  54 sub possibly_foolish_untaint ($) {
  55         my $tainted=shift;
  56         my ($untainted)=$tainted=~/(.*)/;
  57         return $untainted;
  58 }
  59
  60 sub basename {
  61         my $file=shift;
  62
  63         $file=~s!.*/!!;
  64         return $file;
  65 }
  66
  67 sub dirname {
  68         my $file=shift;
  69
  70         $file=~s!/?[^/]+$!!;
  71         return $file;
  72 }
  73
  74 sub pagetype ($) {
  75         my $page=shift;
  76
  77         if ($page =~ /\.mdwn$/) {
  78                 return ".mdwn";
  79         }
  80         else {
  81                 return "unknown";
  82         }
  83 }
  84
  85 sub pagename ($) {
  86         my $file=shift;
  87
  88         my $type=pagetype($file);
  89         my $page=$file;
  90         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
  91         return $page;
  92 }
  93
  94 sub htmlpage ($) {
  95         my $page=shift;
  96
  97         return $page.".html";
  98 }
  99
 100 sub readfile ($) {
 101         my $file=shift;
 102
 103         local $/=undef;
 104         open (IN, "$file") || error("failed to read $file: $!");
 105         my $ret=<IN>;
 106         close IN;
 107         return $ret;
 108 }
 109
 110 sub writefile ($$) {
 111         my $file=shift;
 112         my $content=shift;
 113
 114         my $dir=dirname($file);
 115         if (! -d $dir) {
 116                 my $d="";
 117                 foreach my $s (split(m!/+!, $dir)) {
 118                         $d.="$s/";
 119                         if (! -d $d) {
 120                                 mkdir($d) || error("failed to create directory $d: $!");
 121                         }
 122                 }
 123         }
 124
 125         open (OUT, ">$file") || error("failed to write $file: $!");
 126         print OUT $content;
 127         close OUT;
 128 }
 129
 130 sub findlinks {
 131         my $content=shift;
 132
 133         my @links;
 134         while ($content =~ /$wiki_link_regexp/g) {
 135                 push @links, lc($1);
 136         }
 137         return @links;
 138 }
 139
 140 # Given a page and the text of a link on the page, determine which existing
 141 # page that link best points to. Prefers pages under a subdirectory with
 142 # the same name as the source page, failing that goes down the directory tree
 143 # to the base looking for matching pages.
 144 sub bestlink ($$) {
 145         my $page=shift;
 146         my $link=lc(shift);
 147
 148         my $cwd=$page;
 149         do {
 150                 my $l=$cwd;
 151                 $l.="/" if length $l;
 152                 $l.=$link;
 153
 154                 if (exists $links{$l}) {
 155                         #debug("for $page, \"$link\", use $l");
 156                         return $l;
 157                 }
 158         } while $cwd=~s!/?[^/]+$!!;
 159
 160         #print STDERR "warning: page $page, broken link: $link\n";
 161         return "";
 162 }
 163
 164 sub isinlinableimage ($) {
 165         my $file=shift;
 166
 167         $file=~/\.(png|gif|jpg|jpeg)$/;
 168 }
 169
 170 sub htmllink ($$) {
 171         my $page=shift;
 172         my $link=shift;
 173
 174         my $bestlink=bestlink($page, $link);
 175
 176         return $link if $page eq $bestlink;
 177
 178         # TODO BUG: %renderedfiles may not have it, if the linked to page
 179         # was also added and isn't yet rendered! Note that this bug is
 180         # masked by the bug mentioned below that makes all new files
 181         # be rendered twice.
 182         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 183                 $bestlink=htmlpage($bestlink);
 184         }
 185         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 186                 return "<a href=\"$cgiurl?do=create&page=$link&from=$page\">?</a>$link"
 187         }
 188
 189         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 190
 191         if (isinlinableimage($bestlink)) {
 192                 return "<img src=\"$bestlink\">";
 193         }
 194         return "<a href=\"$bestlink\">$link</a>";
 195 }
 196
 197 sub linkify ($$) {
 198         my $content=shift;
 199         my $file=shift;
 200
 201         $content =~ s/$wiki_link_regexp/htmllink(pagename($file), $1)/eg;
 202
 203         return $content;
 204 }
 205
 206 sub htmlize ($$) {
 207         my $type=shift;
 208         my $content=shift;
 209
 210         if ($type eq '.mdwn') {
 211                 return Markdown::Markdown($content);
 212         }
 213         else {
 214                 error("htmlization of $type not supported");
 215         }
 216 }
 217
 218 sub linkbacks ($$) {
 219         my $content=shift;
 220         my $page=shift;
 221
 222         my @links;
 223         foreach my $p (keys %links) {
 224                 next if bestlink($page, $p) eq $page;
 225                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 226                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 227
 228                         # Trim common dir prefixes from both pages.
 229                         my $p_trimmed=$p;
 230                         my $page_trimmed=$page;
 231                         my $dir;
 232                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 233                                 defined $dir &&
 234                                 $p_trimmed=~s/^\Q$dir\E// &&
 235                                 $page_trimmed=~s/^\Q$dir\E//;
 236
 237                         push @links, "<a href=\"$href\">$p_trimmed</a>";
 238                 }
 239         }
 240
 241         $content.="<hr><p>Links: ".join(" ", sort @links)."</p>\n" if @links;
 242         return $content;
 243 }
 244
 245 sub finalize ($$) {
 246         my $content=shift;
 247         my $page=shift;
 248
 249         my $title=basename($page);
 250         $title=~s/_/ /g;
 251
 252         my $pagelink="";
 253         my $path="";
 254         foreach my $dir (reverse split("/", $page)) {
 255                 if (length($pagelink)) {
 256                         $pagelink="<a href=\"$path$dir.html\">$dir</a>/ $pagelink";
 257                 }
 258                 else {
 259                         $pagelink=$dir;
 260                 }
 261                 $path.="../";
 262         }
 263         $path=~s/\.\.\/$/index.html/;
 264         $pagelink="<a href=\"$path\">$wikiname</a>/ $pagelink";
 265
 266         my @actions;
 267         if (length $cgiurl) {
 268                 push @actions, "<a href=\"$cgiurl?do=edit&page=$page\">Edit</a>";
 269                 push @actions, "<a href=\"$cgiurl?do=recentchanges\">RecentChanges</a>";
 270         }
 271
 272         $content="<html>\n<head><title>$title</title></head>\n<body>\n".
 273                   "<h1>$pagelink</h1>\n".
 274                   "@actions\n<hr>\n".
 275                   $content.
 276                   "</body>\n</html>\n";
 277
 278         return $content;
 279 }
 280
 281 sub render ($) {
 282         my $file=shift;
 283
 284         my $type=pagetype($file);
 285         my $content=readfile("$srcdir/$file");
 286         if ($type ne 'unknown') {
 287                 my $page=pagename($file);
 288
 289                 $links{$page}=[findlinks($content)];
 290
 291                 $content=linkify($content, $file);
 292                 $content=htmlize($type, $content);
 293                 $content=linkbacks($content, $page);
 294                 $content=finalize($content, $page);
 295
 296                 writefile("$destdir/".htmlpage($page), $content);
 297                 $oldpagemtime{$page}=time;
 298                 $renderedfiles{$page}=htmlpage($page);
 299         }
 300         else {
 301                 $links{$file}=[];
 302                 writefile("$destdir/$file", $content);
 303                 $oldpagemtime{$file}=time;
 304                 $renderedfiles{$file}=$file;
 305         }
 306 }
 307
 308 sub loadindex () {
 309         open (IN, "$srcdir/.index") || return;
 310         while (<IN>) {
 311                 $_=possibly_foolish_untaint($_);
 312                 chomp;
 313                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 314                 my $page=pagename($file);
 315                 $pagesources{$page}=$file;
 316                 $oldpagemtime{$page}=$mtime;
 317                 $oldlinks{$page}=[@links];
 318                 $links{$page}=[@links];
 319                 $renderedfiles{$page}=$rendered;
 320         }
 321         close IN;
 322 }
 323
 324 sub saveindex () {
 325         open (OUT, ">$srcdir/.index") || error("cannot write to .index: $!");
 326         foreach my $page (keys %oldpagemtime) {
 327                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 328                         join(" ", @{$links{$page}})."\n"
 329                                 if $oldpagemtime{$page};
 330         }
 331         close OUT;
 332 }
 333
 334 sub rcs_update () {
 335         if (-d "$srcdir/.svn") {
 336                 if (system("svn", "update", "--quiet", $srcdir) != 0) {
 337                         warn("svn update failed\n");
 338                 }
 339         }
 340 }
 341
 342 sub rcs_commit ($) {
 343         my $message=shift;
 344
 345         if (-d "$srcdir/.svn") {
 346                 if (system("svn", "commit", "--quiet", "-m",
 347                            possibly_foolish_untaint($message), $srcdir) != 0) {
 348                         warn("svn commit failed\n");
 349                 }
 350         }
 351 }
 352
 353 sub rcs_add ($) {
 354         my $file=shift;
 355
 356         if (-d "$srcdir/.svn") {
 357                 my $parent=dirname($file);
 358                 while (! -d "$srcdir/$parent/.svn") {
 359                         $file=$parent;
 360                         $parent=dirname($file);
 361                 }
 362
 363                 if (system("svn", "add", "--quiet", "$srcdir/$file") != 0) {
 364                         warn("svn add failed\n");
 365                 }
 366         }
 367 }
 368
 369 sub rcs_recentchanges ($) {
 370         my $num=shift;
 371         my @ret;
 372
 373         eval q{use Date::Parse};
 374         eval q{use Time::Duration};
 375
 376         my %sourcepages=reverse %pagesources;
 377
 378         if (-d "$srcdir/.svn") {
 379                 my $info=`LANG=C svn info $srcdir`;
 380                 my ($svn_url)=$info=~/^URL: (.*)$/m;
 381
 382                 # FIXME: currently assumes that the wiki is somewhere
 383                 # under trunk in svn, doesn't support other layouts.
 384                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 385
 386                 my $div=qr/^--------------------+$/;
 387                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 388                 my $state='start';
 389                 my ($rev, $user, $when, @pages, $message);
 390                 foreach (`LANG=C svn log -v '$svn_url'`) {
 391                         chomp;
 392                         if ($state eq 'start' && /$div/) {
 393                                 $state='header';
 394                         }
 395                         elsif ($state eq 'header' && /$infoline/) {
 396                                 $rev=$1;
 397                                 $user=$2;
 398                                 $when=concise(ago(time - str2time($3)));
 399                         }
 400                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/(.+)$/) {
 401                                 push @pages, exists $sourcepages{$1} ? $sourcepages{$1} : $1;
 402                         }
 403                         elsif ($state eq 'header' && /^$/) {
 404                                 $state='body';
 405                         }
 406                         elsif ($state eq 'body' && /$div/) {
 407                                 push @ret, { rev => $rev, user => $user,
 408                                         when => $when, message => $message,
 409                                         pages => [@pages] };
 410                                 return @ret if @ret >= $num;
 411
 412                                 $state='header';
 413                                 $message=$rev=$user=$when=undef;
 414                                 @pages=();
 415                         }
 416                         elsif ($state eq 'body') {
 417                                 $message.="$_<br>\n";
 418                         }
 419                 }
 420         }
 421
 422         return @ret;
 423 }
 424
 425 sub prune ($) {
 426         my $file=shift;
 427
 428         unlink($file);
 429         my $dir=dirname($file);
 430         while (rmdir($dir)) {
 431                 $dir=dirname($dir);
 432         }
 433 }
 434
 435 sub refresh () {
 436         # Find existing pages.
 437         my %exists;
 438         my @files;
 439         find({
 440                 no_chdir => 1,
 441                 wanted => sub {
 442                         if (/$wiki_file_prune_regexp/) {
 443                                 $File::Find::prune=1;
 444                         }
 445                         elsif (! -d $_) {
 446                                 my ($f)=/$wiki_file_regexp/; # untaint
 447                                 if (! defined $f) {
 448                                         warn("skipping bad filename $_\n");
 449                                 }
 450                                 else {
 451                                         $f=~s/^\Q$srcdir\E\/?//;
 452                                         push @files, $f;
 453                                         $exists{pagename($f)}=1;
 454                                 }
 455                         }
 456                 },
 457         }, $srcdir);
 458
 459         my %rendered;
 460
 461         # check for added or removed pages
 462         my @add;
 463         foreach my $file (@files) {
 464                 my $page=pagename($file);
 465                 if (! $oldpagemtime{$page}) {
 466                         debug("new page $page");
 467                         push @add, $file;
 468                         $links{$page}=[];
 469                         $pagesources{$page}=$file;
 470                 }
 471         }
 472         my @del;
 473         foreach my $page (keys %oldpagemtime) {
 474                 if (! $exists{$page}) {
 475                         debug("removing old page $page");
 476                         push @del, $renderedfiles{$page};
 477                         prune($destdir."/".$renderedfiles{$page});
 478                         delete $renderedfiles{$page};
 479                         $oldpagemtime{$page}=0;
 480                         delete $pagesources{$page};
 481                 }
 482         }
 483
 484         # render any updated files
 485         foreach my $file (@files) {
 486                 my $page=pagename($file);
 487
 488                 if (! exists $oldpagemtime{$page} ||
 489                     mtime("$srcdir/$file") > $oldpagemtime{$page}) {
 490                         debug("rendering changed file $file");
 491                         render($file);
 492                         $rendered{$file}=1;
 493                 }
 494         }
 495
 496         # if any files were added or removed, check to see if each page
 497         # needs an update due to linking to them
 498         # TODO: inefficient; pages may get rendered above and again here;
 499         # problem is the bestlink may have changed and we won't know until
 500         # now
 501         if (@add || @del) {
 502 FILE:           foreach my $file (@files) {
 503                         my $page=pagename($file);
 504                         foreach my $f (@add, @del) {
 505                                 my $p=pagename($f);
 506                                 foreach my $link (@{$links{$page}}) {
 507                                         if (bestlink($page, $link) eq $p) {
 508                                                 debug("rendering $file, which links to $p");
 509                                                 render($file);
 510                                                 $rendered{$file}=1;
 511                                                 next FILE;
 512                                         }
 513                                 }
 514                         }
 515                 }
 516         }
 517
 518         # handle linkbacks; if a page has added/removed links, update the
 519         # pages it links to
 520         # TODO: inefficient; pages may get rendered above and again here;
 521         # problem is the linkbacks could be wrong in the first pass render
 522         # above
 523         if (%rendered) {
 524                 my %linkchanged;
 525                 foreach my $file (keys %rendered, @del) {
 526                         my $page=pagename($file);
 527                         if (exists $links{$page}) {
 528                                 foreach my $link (@{$links{$page}}) {
 529                                         $link=bestlink($page, $link);
 530                                         if (length $link &&
 531                                             ! exists $oldlinks{$page} ||
 532                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 533                                                 $linkchanged{$link}=1;
 534                                         }
 535                                 }
 536                         }
 537                         if (exists $oldlinks{$page}) {
 538                                 foreach my $link (@{$oldlinks{$page}}) {
 539                                         $link=bestlink($page, $link);
 540                                         if (length $link &&
 541                                             ! exists $links{$page} ||
 542                                             ! grep { $_ eq $link } @{$links{$page}}) {
 543                                                 $linkchanged{$link}=1;
 544                                         }
 545                                 }
 546                         }
 547                 }
 548                 foreach my $link (keys %linkchanged) {
 549                         my $linkfile=$pagesources{$link};
 550                         if (defined $linkfile) {
 551                                 debug("rendering $linkfile, to update its linkbacks");
 552                                 render($linkfile);
 553                         }
 554                 }
 555         }
 556 }
 557
 558 # Generates a C wrapper program for running ikiwiki in a specific way.
 559 # The wrapper may be safely made suid.
 560 sub gen_wrapper ($$) {
 561         my ($svn, $rebuild)=@_;
 562
 563         eval q{use Cwd 'abs_path'};
 564         $srcdir=abs_path($srcdir);
 565         $destdir=abs_path($destdir);
 566         my $this=abs_path($0);
 567         if (! -x $this) {
 568                 error("$this doesn't seem to be executable");
 569         }
 570
 571         my @params=($srcdir, $destdir, "--wikiname=$wikiname");
 572         push @params, "--verbose" if $verbose;
 573         push @params, "--rebuild" if $rebuild;
 574         push @params, "--nosvn" if !$svn;
 575         push @params, "--cgi" if $cgi;
 576         push @params, "--url=$url" if $url;
 577         push @params, "--cgiurl=$cgiurl" if $cgiurl;
 578         my $params=join(" ", @params);
 579         my $call='';
 580         foreach my $p ($this, $this, @params) {
 581                 $call.=qq{"$p", };
 582         }
 583         $call.="NULL";
 584
 585         my @envsave;
 586         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 587                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE} if $cgi;
 588         my $envsave="";
 589         foreach my $var (@envsave) {
 590                 $envsave.=<<"EOF"
 591         if ((s=getenv("$var")))
 592                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 593 EOF
 594         }
 595
 596         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 597         print OUT <<"EOF";
 598 /* A wrapper for ikiwiki, can be safely made suid. */
 599 #define _GNU_SOURCE
 600 #include <stdio.h>
 601 #include <unistd.h>
 602 #include <stdlib.h>
 603 #include <string.h>
 604
 605 extern char **environ;
 606
 607 int main (int argc, char **argv) {
 608         /* Sanitize environment. */
 609         char *s;
 610         char *newenviron[$#envsave+3];
 611         int i=0;
 612 $envsave
 613         newenviron[i++]="HOME=$ENV{HOME}";
 614         newenviron[i]=NULL;
 615         environ=newenviron;
 616
 617         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 618                 printf("$params\\n");
 619                 exit(0);
 620         }
 621
 622         execl($call);
 623         perror("failed to run $this");
 624         exit(1);
 625 }
 626 EOF
 627         close OUT;
 628         if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
 629                 error("failed to compile ikiwiki-wrap.c");
 630         }
 631         unlink("ikiwiki-wrap.c");
 632         print "successfully generated ikiwiki-wrap\n";
 633         exit 0;
 634 }
 635
 636 sub cgi () {
 637         eval q{use CGI};
 638         my $q=CGI->new;
 639
 640         my $do=$q->param('do');
 641         if (! defined $do || ! length $do) {
 642                 error("\"do\" parameter missing");
 643         }
 644
 645         if ($do eq 'recentchanges') {
 646                 my $list="<ul>\n";
 647                 foreach my $change (rcs_recentchanges(100)) {
 648                         $list.="<li>";
 649                         foreach my $page (@{$change->{pages}}) {
 650                                 $list.=$page." ";
 651                         }
 652                         $list.="<br>\n";
 653                         $list.="changed ".$change->{when}." by ".
 654                                htmllink("index", $change->{user}).
 655                                ": <i>".$change->{message}."</i>\n";
 656                         $list.="</li>\n";
 657                 }
 658                 $list.="</ul>\n";
 659
 660                 print $q->header,
 661                       $q->start_html("RecentChanges"),
 662                       $q->h1("<a href=\"$url\">$wikiname</a>/ RecentChanges"),
 663                       $list,
 664                       $q->end_form,
 665                       $q->end_html;
 666                 return;
 667         }
 668
 669         my ($page)=$q->param('page')=~/$wiki_file_regexp/;
 670         if (! defined $page || ! length $page || $page ne $q->param('page') ||
 671             $page=~/$wiki_file_prune_regexp/ || $page=~/^\//) {
 672                 error("bad page name");
 673         }
 674         $page=lc($page);
 675
 676         my $action=$q->request_uri;
 677         $action=~s/\?.*//;
 678
 679         if ($do eq 'create') {
 680                 if (exists $pagesources{lc($page)}) {
 681                         # hmm, someone else made the page in the meantime?
 682                         print $q->redirect("$url/".htmlpage($page));
 683                 }
 684
 685                 my @page_locs;
 686                 my ($from)=$q->param('from')=~/$wiki_file_regexp/;
 687                 if (! defined $from || ! length $from ||
 688                     $from ne $q->param('from') ||
 689                     $from=~/$wiki_file_prune_regexp/ || $from=~/^\//) {
 690                         @page_locs=$page;
 691                 }
 692                 else {
 693                         my $dir=$from."/";
 694                         $dir=~s![^/]+/$!!;
 695                         push @page_locs, $dir.$page;
 696                         push @page_locs, "$from/$page";
 697                         while (length $dir) {
 698                                 $dir=~s![^/]+/$!!;
 699                                 push @page_locs, $dir.$page;
 700                         }
 701                 }
 702
 703                 $q->param("do", "save");
 704                 print $q->header,
 705                       $q->start_html("Creating $page"),
 706                       $q->start_h1("<a href=\"$url\">$wikiname</a>/ Creating $page"),
 707                       $q->start_form(-action => $action),
 708                       $q->hidden('do'),
 709                       "Select page location:",
 710                       $q->popup_menu('page', \@page_locs),
 711                       $q->textarea(-name => 'content',
 712                                -default => "",
 713                                -rows => 20,
 714                                -columns => 80),
 715                       $q->br,
 716                       "Optional comment about this change:",
 717                       $q->br,
 718                       $q->textfield(-name => "comments", -size => 80),
 719                       $q->br,
 720                       $q->submit("Save Page"),
 721                       $q->end_form,
 722                       $q->end_html;
 723         }
 724         elsif ($do eq 'edit') {
 725                 my $content="";
 726                 if (exists $pagesources{lc($page)}) {
 727                         $content=readfile("$srcdir/$pagesources{lc($page)}");
 728                         $content=~s/\n/\r\n/g;
 729                 }
 730                 $q->param("do", "save");
 731                 print $q->header,
 732                       $q->start_html("Editing $page"),
 733                       $q->h1("<a href=\"$url\">$wikiname</a>/ Editing $page"),
 734                       $q->start_form(-action => $action),
 735                       $q->hidden('do'),
 736                       $q->hidden('page'),
 737                       $q->textarea(-name => 'content',
 738                                -default => $content,
 739                                -rows => 20,
 740                                -columns => 80),
 741                       $q->br,
 742                       "Optional comment about this change:",
 743                       $q->br,
 744                       $q->textfield(-name => "comments", -size => 80),
 745                       $q->br,
 746                       $q->submit("Save Page"),
 747                       $q->end_form,
 748                       $q->end_html;
 749         }
 750         elsif ($do eq 'save') {
 751                 my $file=$page.$default_pagetype;
 752                 my $newfile=1;
 753                 if (exists $pagesources{lc($page)}) {
 754                         $file=$pagesources{lc($page)};
 755                         $newfile=0;
 756                 }
 757
 758                 my $content=$q->param('content');
 759                 $content=~s/\r\n/\n/g;
 760                 $content=~s/\r/\n/g;
 761                 writefile("$srcdir/$file", $content);
 762
 763                 my $message="web commit from $ENV{REMOTE_ADDR}";
 764                 if (defined $q->param('comments')) {
 765                         $message.=": ".$q->param('comments');
 766                 }
 767
 768                 if ($svn) {
 769                         if ($newfile) {
 770                                 rcs_add($file);
 771                         }
 772                         # presumably the commit will trigger an update
 773                         # of the wiki
 774                         rcs_commit($message);
 775                 }
 776                 else {
 777                         refresh();
 778                 }
 779
 780                 print $q->redirect("$url/".htmlpage($page));
 781         }
 782         else {
 783                 error("unknown do parameter");
 784         }
 785 }
 786
 787 my $rebuild=0;
 788 my $wrapper=0;
 789 if (grep /^-/, @ARGV) {
 790         eval {use Getopt::Long};
 791         GetOptions(
 792                 "wikiname=s" => \$wikiname,
 793                 "verbose|v" => \$verbose,
 794                 "rebuild" => \$rebuild,
 795                 "wrapper" => \$wrapper,
 796                 "svn!" => \$svn,
 797                 "cgi" => \$cgi,
 798                 "url=s" => \$url,
 799                 "cgiurl=s" => \$cgiurl,
 800         ) || usage();
 801 }
 802 usage() unless @ARGV == 2;
 803 ($srcdir) = possibly_foolish_untaint(shift);
 804 ($destdir) = possibly_foolish_untaint(shift);
 805
 806 if ($cgi && ! length $url) {
 807         error("Must specify url to wiki with --url when using --cgi");
 808 }
 809
 810 gen_wrapper($svn, $rebuild) if $wrapper;
 811 memoize('pagename');
 812 memoize('bestlink');
 813 loadindex() unless $rebuild;
 814 if ($cgi) {
 815         cgi();
 816 }
 817 else {
 818         rcs_update() if $svn;
 819         refresh();
 820         saveindex();
 821 }