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