git.oblomov.eu Git - ikiwiki/blob - ikiwiki

   1 #!/usr/bin/perl -T
   2 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
   3
   4 use warnings;
   5 use strict;
   6 use Memoize;
   7 use File::Spec;
   8 use HTML::Template;
   9 use Getopt::Long;
  10
  11 my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
  12
  13 # Holds global config settings, also used by some modules.
  14 our %config=( #{{{
  15         wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$)},
  16         wiki_link_regexp => qr/\[\[([^\s]+)\]\]/,
  17         wiki_file_regexp => qr/(^[-A-Za-z0-9_.:\/+]+$)/,
  18         verbose => 0,
  19         wikiname => "wiki",
  20         default_pageext => ".mdwn",
  21         cgi => 0,
  22         svn => 1,
  23         url => '',
  24         cgiurl => '',
  25         historyurl => '',
  26         anonok => 0,
  27         rebuild => 0,
  28         wrapper => undef,
  29         wrappermode => undef,
  30         srcdir => undef,
  31         destdir => undef,
  32         templatedir => undef,
  33         setup => undef,
  34 ); #}}}
  35
  36 GetOptions( #{{{
  37         "setup=s" => \$config{setup},
  38         "wikiname=s" => \$config{wikiname},
  39         "verbose|v!" => \$config{verbose},
  40         "rebuild!" => \$config{rebuild},
  41         "wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
  42         "wrappermode=i" => \$config{wrappermode},
  43         "svn!" => \$config{svn},
  44         "anonok!" => \$config{anonok},
  45         "cgi!" => \$config{cgi},
  46         "url=s" => \$config{url},
  47         "cgiurl=s" => \$config{cgiurl},
  48         "historyurl=s" => \$config{historyurl},
  49         "exclude=s@" => sub {
  50                 $config{wiki_file_prune_regexp}=qr/$config{wiki_file_prune_regexp}|$_[1]/;
  51         },
  52 ) || usage();
  53
  54 if (! $config{setup}) {
  55         usage() unless @ARGV == 3;
  56         $config{srcdir} = possibly_foolish_untaint(shift);
  57         $config{templatedir} = possibly_foolish_untaint(shift);
  58         $config{destdir} = possibly_foolish_untaint(shift);
  59         if ($config{cgi} && ! length $config{url}) {
  60                 error("Must specify url to wiki with --url when using --cgi");
  61         }
  62 }
  63 #}}}
  64
  65 sub usage { #{{{
  66         die "usage: ikiwiki [options] source templates dest\n";
  67 } #}}}
  68
  69 sub error { #{{{
  70         if ($config{cgi}) {
  71                 print "Content-type: text/html\n\n";
  72                 print misctemplate("Error", "<p>Error: @_</p>");
  73         }
  74         die @_;
  75 } #}}}
  76
  77 sub debug ($) { #{{{
  78         return unless $config{verbose};
  79         if (! $config{cgi}) {
  80                 print "@_\n";
  81         }
  82         else {
  83                 print STDERR "@_\n";
  84         }
  85 } #}}}
  86
  87 sub mtime ($) { #{{{
  88         my $page=shift;
  89
  90         return (stat($page))[9];
  91 } #}}}
  92
  93 sub possibly_foolish_untaint { #{{{
  94         my $tainted=shift;
  95         my ($untainted)=$tainted=~/(.*)/;
  96         return $untainted;
  97 } #}}}
  98
  99 sub basename ($) { #{{{
 100         my $file=shift;
 101
 102         $file=~s!.*/!!;
 103         return $file;
 104 } #}}}
 105
 106 sub dirname ($) { #{{{
 107         my $file=shift;
 108
 109         $file=~s!/?[^/]+$!!;
 110         return $file;
 111 } #}}}
 112
 113 sub pagetype ($) { #{{{
 114         my $page=shift;
 115
 116         if ($page =~ /\.mdwn$/) {
 117                 return ".mdwn";
 118         }
 119         else {
 120                 return "unknown";
 121         }
 122 } #}}}
 123
 124 sub pagename ($) { #{{{
 125         my $file=shift;
 126
 127         my $type=pagetype($file);
 128         my $page=$file;
 129         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
 130         return $page;
 131 } #}}}
 132
 133 sub htmlpage ($) { #{{{
 134         my $page=shift;
 135
 136         return $page.".html";
 137 } #}}}
 138
 139 sub readfile ($) { #{{{
 140         my $file=shift;
 141
 142         local $/=undef;
 143         open (IN, "$file") || error("failed to read $file: $!");
 144         my $ret=<IN>;
 145         close IN;
 146         return $ret;
 147 } #}}}
 148
 149 sub writefile ($$) { #{{{
 150         my $file=shift;
 151         my $content=shift;
 152
 153         my $dir=dirname($file);
 154         if (! -d $dir) {
 155                 my $d="";
 156                 foreach my $s (split(m!/+!, $dir)) {
 157                         $d.="$s/";
 158                         if (! -d $d) {
 159                                 mkdir($d) || error("failed to create directory $d: $!");
 160                         }
 161                 }
 162         }
 163
 164         open (OUT, ">$file") || error("failed to write $file: $!");
 165         print OUT $content;
 166         close OUT;
 167 } #}}}
 168
 169 sub findlinks ($$) { #{{{
 170         my $content=shift;
 171         my $page=shift;
 172
 173         my @links;
 174         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 175                 push @links, lc($1);
 176         }
 177         # Discussion links are a special case since they're not in the text
 178         # of the page, but on its template.
 179         return @links, "$page/discussion";
 180 } #}}}
 181
 182 sub bestlink ($$) { #{{{
 183         # Given a page and the text of a link on the page, determine which
 184         # existing page that link best points to. Prefers pages under a
 185         # subdirectory with the same name as the source page, failing that
 186         # goes down the directory tree to the base looking for matching
 187         # pages.
 188         my $page=shift;
 189         my $link=lc(shift);
 190
 191         my $cwd=$page;
 192         do {
 193                 my $l=$cwd;
 194                 $l.="/" if length $l;
 195                 $l.=$link;
 196
 197                 if (exists $links{$l}) {
 198                         #debug("for $page, \"$link\", use $l");
 199                         return $l;
 200                 }
 201         } while $cwd=~s!/?[^/]+$!!;
 202
 203         #print STDERR "warning: page $page, broken link: $link\n";
 204         return "";
 205 } #}}}
 206
 207 sub isinlinableimage ($) { #{{{
 208         my $file=shift;
 209
 210         $file=~/\.(png|gif|jpg|jpeg)$/;
 211 } #}}}
 212
 213 sub htmllink { #{{{
 214         my $page=shift;
 215         my $link=shift;
 216         my $noimageinline=shift; # don't turn links into inline html images
 217         my $forcesubpage=shift; # force a link to a subpage
 218
 219         my $bestlink;
 220         if (! $forcesubpage) {
 221                 $bestlink=bestlink($page, $link);
 222         }
 223         else {
 224                 $bestlink="$page/".lc($link);
 225         }
 226
 227         return $link if length $bestlink && $page eq $bestlink;
 228
 229         # TODO BUG: %renderedfiles may not have it, if the linked to page
 230         # was also added and isn't yet rendered! Note that this bug is
 231         # masked by the bug mentioned below that makes all new files
 232         # be rendered twice.
 233         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 234                 $bestlink=htmlpage($bestlink);
 235         }
 236         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 237                 return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
 238         }
 239
 240         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 241
 242         if (! $noimageinline && isinlinableimage($bestlink)) {
 243                 return "<img src=\"$bestlink\">";
 244         }
 245         return "<a href=\"$bestlink\">$link</a>";
 246 } #}}}
 247
 248 sub linkify ($$) { #{{{
 249         my $content=shift;
 250         my $file=shift;
 251
 252         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 253                 $1 ? "[[$2]]" : htmllink(pagename($file), $2)
 254         }eg;
 255
 256         return $content;
 257 } #}}}
 258
 259 sub htmlize ($$) { #{{{
 260         my $type=shift;
 261         my $content=shift;
 262
 263         if (! $INC{"/usr/bin/markdown"}) {
 264                 no warnings 'once';
 265                 $blosxom::version="is a proper perl module too much to ask?";
 266                 use warnings 'all';
 267                 do "/usr/bin/markdown";
 268         }
 269
 270         if ($type eq '.mdwn') {
 271                 return Markdown::Markdown($content);
 272         }
 273         else {
 274                 error("htmlization of $type not supported");
 275         }
 276 } #}}}
 277
 278 sub backlinks ($) { #{{{
 279         my $page=shift;
 280
 281         my @links;
 282         foreach my $p (keys %links) {
 283                 next if bestlink($page, $p) eq $page;
 284                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 285                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 286
 287                         # Trim common dir prefixes from both pages.
 288                         my $p_trimmed=$p;
 289                         my $page_trimmed=$page;
 290                         my $dir;
 291                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 292                                 defined $dir &&
 293                                 $p_trimmed=~s/^\Q$dir\E// &&
 294                                 $page_trimmed=~s/^\Q$dir\E//;
 295
 296                         push @links, { url => $href, page => $p_trimmed };
 297                 }
 298         }
 299
 300         return sort { $a->{page} cmp $b->{page} } @links;
 301 } #}}}
 302
 303 sub parentlinks ($) { #{{{
 304         my $page=shift;
 305
 306         my @ret;
 307         my $pagelink="";
 308         my $path="";
 309         my $skip=1;
 310         foreach my $dir (reverse split("/", $page)) {
 311                 if (! $skip) {
 312                         $path.="../";
 313                         unshift @ret, { url => "$path$dir.html", page => $dir };
 314                 }
 315                 else {
 316                         $skip=0;
 317                 }
 318         }
 319         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
 320         return @ret;
 321 } #}}}
 322
 323 sub indexlink () { #{{{
 324         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 325 } #}}}
 326
 327 sub finalize ($$) { #{{{
 328         my $content=shift;
 329         my $page=shift;
 330
 331         my $title=basename($page);
 332         $title=~s/_/ /g;
 333
 334         my $template=HTML::Template->new(blind_cache => 1,
 335                 filename => "$config{templatedir}/page.tmpl");
 336
 337         if (length $config{cgiurl}) {
 338                 $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
 339                 if ($config{svn}) {
 340                         $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
 341                 }
 342         }
 343
 344         if (length $config{historyurl}) {
 345                 my $u=$config{historyurl};
 346                 $u=~s/\[\[\]\]/$pagesources{$page}/g;
 347                 $template->param(historyurl => $u);
 348         }
 349
 350         $template->param(
 351                 title => $title,
 352                 wikiname => $config{wikiname},
 353                 parentlinks => [parentlinks($page)],
 354                 content => $content,
 355                 backlinks => [backlinks($page)],
 356                 discussionlink => htmllink($page, "Discussion", 1, 1),
 357         );
 358
 359         return $template->output;
 360 } #}}}
 361
 362 sub check_overwrite ($$) { #{{{
 363         # Important security check. Make sure to call this before saving
 364         # any files to the source directory.
 365         my $dest=shift;
 366         my $src=shift;
 367
 368         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 369                 error("$dest already exists and was rendered from ".
 370                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 371                                 %renderedfiles)).
 372                         ", before, so not rendering from $src");
 373         }
 374 } #}}}
 375
 376 sub render ($) { #{{{
 377         my $file=shift;
 378
 379         my $type=pagetype($file);
 380         my $content=readfile("$config{srcdir}/$file");
 381         if ($type ne 'unknown') {
 382                 my $page=pagename($file);
 383
 384                 $links{$page}=[findlinks($content, $page)];
 385
 386                 $content=linkify($content, $file);
 387                 $content=htmlize($type, $content);
 388                 $content=finalize($content, $page);
 389
 390                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 391                 writefile("$config{destdir}/".htmlpage($page), $content);
 392                 $oldpagemtime{$page}=time;
 393                 $renderedfiles{$page}=htmlpage($page);
 394         }
 395         else {
 396                 $links{$file}=[];
 397                 check_overwrite("$config{destdir}/$file", $file);
 398                 writefile("$config{destdir}/$file", $content);
 399                 $oldpagemtime{$file}=time;
 400                 $renderedfiles{$file}=$file;
 401         }
 402 } #}}}
 403
 404 sub lockwiki () { #{{{
 405         # Take an exclusive lock on the wiki to prevent multiple concurrent
 406         # run issues. The lock will be dropped on program exit.
 407         if (! -d "$config{srcdir}/.ikiwiki") {
 408                 mkdir("$config{srcdir}/.ikiwiki");
 409         }
 410         open(WIKILOCK, ">$config{srcdir}/.ikiwiki/lockfile") || error ("cannot write to lockfile: $!");
 411         if (! flock(WIKILOCK, 2 | 4)) {
 412                 debug("wiki seems to be locked, waiting for lock");
 413                 my $wait=600; # arbitrary, but don't hang forever to
 414                               # prevent process pileup
 415                 for (1..600) {
 416                         return if flock(WIKILOCK, 2 | 4);
 417                         sleep 1;
 418                 }
 419                 error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 420         }
 421 } #}}}
 422
 423 sub loadindex () { #{{{
 424         open (IN, "$config{srcdir}/.ikiwiki/index") || return;
 425         while (<IN>) {
 426                 $_=possibly_foolish_untaint($_);
 427                 chomp;
 428                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 429                 my $page=pagename($file);
 430                 $pagesources{$page}=$file;
 431                 $oldpagemtime{$page}=$mtime;
 432                 $oldlinks{$page}=[@links];
 433                 $links{$page}=[@links];
 434                 $renderedfiles{$page}=$rendered;
 435         }
 436         close IN;
 437 } #}}}
 438
 439 sub saveindex () { #{{{
 440         if (! -d "$config{srcdir}/.ikiwiki") {
 441                 mkdir("$config{srcdir}/.ikiwiki");
 442         }
 443         open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
 444         foreach my $page (keys %oldpagemtime) {
 445                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 446                         join(" ", @{$links{$page}})."\n"
 447                                 if $oldpagemtime{$page};
 448         }
 449         close OUT;
 450 } #}}}
 451
 452 sub rcs_update () { #{{{
 453         if (-d "$config{srcdir}/.svn") {
 454                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 455                         warn("svn update failed\n");
 456                 }
 457         }
 458 } #}}}
 459
 460 sub rcs_commit ($) { #{{{
 461         my $message=shift;
 462
 463         if (-d "$config{srcdir}/.svn") {
 464                 if (system("svn", "commit", "--quiet", "-m",
 465                            possibly_foolish_untaint($message),
 466                            $config{srcdir}) != 0) {
 467                         warn("svn commit failed\n");
 468                 }
 469         }
 470 } #}}}
 471
 472 sub rcs_add ($) { #{{{
 473         my $file=shift;
 474
 475         if (-d "$config{srcdir}/.svn") {
 476                 my $parent=dirname($file);
 477                 while (! -d "$config{srcdir}/$parent/.svn") {
 478                         $file=$parent;
 479                         $parent=dirname($file);
 480                 }
 481
 482                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 483                         warn("svn add failed\n");
 484                 }
 485         }
 486 } #}}}
 487
 488 sub rcs_recentchanges ($) { #{{{
 489         my $num=shift;
 490         my @ret;
 491
 492         eval q{use Date::Parse};
 493         eval q{use Time::Duration};
 494
 495         if (-d "$config{srcdir}/.svn") {
 496                 my $info=`LANG=C svn info $config{srcdir}`;
 497                 my ($svn_url)=$info=~/^URL: (.*)$/m;
 498
 499                 # FIXME: currently assumes that the wiki is somewhere
 500                 # under trunk in svn, doesn't support other layouts.
 501                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 502
 503                 my $div=qr/^--------------------+$/;
 504                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 505                 my $state='start';
 506                 my ($rev, $user, $when, @pages, @message);
 507                 foreach (`LANG=C svn log -v '$svn_url'`) {
 508                         chomp;
 509                         if ($state eq 'start' && /$div/) {
 510                                 $state='header';
 511                         }
 512                         elsif ($state eq 'header' && /$infoline/) {
 513                                 $rev=$1;
 514                                 $user=$2;
 515                                 $when=concise(ago(time - str2time($3)));
 516                         }
 517                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/(.+)$/) {
 518                                 push @pages, { link => htmllink("", pagename($1), 1) }
 519                                         if length $1;
 520                         }
 521                         elsif ($state eq 'header' && /^$/) {
 522                                 $state='body';
 523                         }
 524                         elsif ($state eq 'body' && /$div/) {
 525                                 my $committype="web";
 526                                 if (defined $message[0] &&
 527                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 528                                         $user="$1";
 529                                         $message[0]->{line}=$2;
 530                                 }
 531                                 else {
 532                                         $committype="svn";
 533                                 }
 534
 535                                 push @ret, { rev => $rev,
 536                                         user => htmllink("", $user, 1),
 537                                         committype => $committype,
 538                                         when => $when, message => [@message],
 539                                         pages => [@pages] } if @pages;
 540                                 return @ret if @ret >= $num;
 541
 542                                 $state='header';
 543                                 $rev=$user=$when=undef;
 544                                 @pages=@message=();
 545                         }
 546                         elsif ($state eq 'body') {
 547                                 push @message, {line => escapeHTML($_)},
 548                         }
 549                 }
 550         }
 551
 552         return @ret;
 553 } #}}}
 554
 555 sub prune ($) { #{{{
 556         my $file=shift;
 557
 558         unlink($file);
 559         my $dir=dirname($file);
 560         while (rmdir($dir)) {
 561                 $dir=dirname($dir);
 562         }
 563 } #}}}
 564
 565 sub refresh () { #{{{
 566         # Find existing pages.
 567         my %exists;
 568         my @files;
 569
 570         eval q{use File::Find};
 571         find({
 572                 no_chdir => 1,
 573                 wanted => sub {
 574                         if (/$config{wiki_file_prune_regexp}/) {
 575                                 no warnings 'once';
 576                                 $File::Find::prune=1;
 577                                 use warnings "all";
 578                         }
 579                         elsif (! -d $_ && ! -l $_) {
 580                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 581                                 if (! defined $f) {
 582                                         warn("skipping bad filename $_\n");
 583                                 }
 584                                 else {
 585                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 586                                         push @files, $f;
 587                                         $exists{pagename($f)}=1;
 588                                 }
 589                         }
 590                 },
 591         }, $config{srcdir});
 592
 593         my %rendered;
 594
 595         # check for added or removed pages
 596         my @add;
 597         foreach my $file (@files) {
 598                 my $page=pagename($file);
 599                 if (! $oldpagemtime{$page}) {
 600                         debug("new page $page");
 601                         push @add, $file;
 602                         $links{$page}=[];
 603                         $pagesources{$page}=$file;
 604                 }
 605         }
 606         my @del;
 607         foreach my $page (keys %oldpagemtime) {
 608                 if (! $exists{$page}) {
 609                         debug("removing old page $page");
 610                         push @del, $renderedfiles{$page};
 611                         prune($config{destdir}."/".$renderedfiles{$page});
 612                         delete $renderedfiles{$page};
 613                         $oldpagemtime{$page}=0;
 614                         delete $pagesources{$page};
 615                 }
 616         }
 617
 618         # render any updated files
 619         foreach my $file (@files) {
 620                 my $page=pagename($file);
 621
 622                 if (! exists $oldpagemtime{$page} ||
 623                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 624                         debug("rendering changed file $file");
 625                         render($file);
 626                         $rendered{$file}=1;
 627                 }
 628         }
 629
 630         # if any files were added or removed, check to see if each page
 631         # needs an update due to linking to them
 632         # TODO: inefficient; pages may get rendered above and again here;
 633         # problem is the bestlink may have changed and we won't know until
 634         # now
 635         if (@add || @del) {
 636 FILE:           foreach my $file (@files) {
 637                         my $page=pagename($file);
 638                         foreach my $f (@add, @del) {
 639                                 my $p=pagename($f);
 640                                 foreach my $link (@{$links{$page}}) {
 641                                         if (bestlink($page, $link) eq $p) {
 642                                                 debug("rendering $file, which links to $p");
 643                                                 render($file);
 644                                                 $rendered{$file}=1;
 645                                                 next FILE;
 646                                         }
 647                                 }
 648                         }
 649                 }
 650         }
 651
 652         # handle backlinks; if a page has added/removed links, update the
 653         # pages it links to
 654         # TODO: inefficient; pages may get rendered above and again here;
 655         # problem is the backlinks could be wrong in the first pass render
 656         # above
 657         if (%rendered) {
 658                 my %linkchanged;
 659                 foreach my $file (keys %rendered, @del) {
 660                         my $page=pagename($file);
 661                         if (exists $links{$page}) {
 662                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 663                                         if (length $link &&
 664                                             ! exists $oldlinks{$page} ||
 665                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 666                                                 $linkchanged{$link}=1;
 667                                         }
 668                                 }
 669                         }
 670                         if (exists $oldlinks{$page}) {
 671                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 672                                         if (length $link &&
 673                                             ! exists $links{$page} ||
 674                                             ! grep { $_ eq $link } @{$links{$page}}) {
 675                                                 $linkchanged{$link}=1;
 676                                         }
 677                                 }
 678                         }
 679                 }
 680                 foreach my $link (keys %linkchanged) {
 681                         my $linkfile=$pagesources{$link};
 682                         if (defined $linkfile) {
 683                                 debug("rendering $linkfile, to update its backlinks");
 684                                 render($linkfile);
 685                         }
 686                 }
 687         }
 688 } #}}}
 689
 690 sub gen_wrapper (@) { #{{{
 691         my %config=(@_);
 692         eval q{use Cwd 'abs_path'};
 693         $config{srcdir}=abs_path($config{srcdir});
 694         $config{destdir}=abs_path($config{destdir});
 695         my $this=abs_path($0);
 696         if (! -x $this) {
 697                 error("$this doesn't seem to be executable");
 698         }
 699
 700         if ($config{setup}) {
 701                 error("cannot create a wrapper that uses a setup file");
 702         }
 703
 704         my @params=($config{srcdir}, $config{templatedir}, $config{destdir},
 705                 "--wikiname=$config{wikiname}");
 706         push @params, "--verbose" if $config{verbose};
 707         push @params, "--rebuild" if $config{rebuild};
 708         push @params, "--nosvn" if !$config{svn};
 709         push @params, "--cgi" if $config{cgi};
 710         push @params, "--url=$config{url}" if length $config{url};
 711         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 712         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 713         push @params, "--anonok" if $config{anonok};
 714         my $params=join(" ", @params);
 715         my $call='';
 716         foreach my $p ($this, $this, @params) {
 717                 $call.=qq{"$p", };
 718         }
 719         $call.="NULL";
 720
 721         my @envsave;
 722         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 723                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 724                        HTTP_COOKIE} if $config{cgi};
 725         my $envsave="";
 726         foreach my $var (@envsave) {
 727                 $envsave.=<<"EOF"
 728         if ((s=getenv("$var")))
 729                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 730 EOF
 731         }
 732
 733         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 734         print OUT <<"EOF";
 735 /* A wrapper for ikiwiki, can be safely made suid. */
 736 #define _GNU_SOURCE
 737 #include <stdio.h>
 738 #include <unistd.h>
 739 #include <stdlib.h>
 740 #include <string.h>
 741
 742 extern char **environ;
 743
 744 int main (int argc, char **argv) {
 745         /* Sanitize environment. */
 746         char *s;
 747         char *newenviron[$#envsave+3];
 748         int i=0;
 749 $envsave
 750         newenviron[i++]="HOME=$ENV{HOME}";
 751         newenviron[i]=NULL;
 752         environ=newenviron;
 753
 754         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 755                 printf("$params\\n");
 756                 exit(0);
 757         }
 758
 759         execl($call);
 760         perror("failed to run $this");
 761         exit(1);
 762 }
 763 EOF
 764         close OUT;
 765         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 766                 error("failed to compile ikiwiki-wrap.c");
 767         }
 768         unlink("ikiwiki-wrap.c");
 769         if (defined $config{wrappermode} &&
 770             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 771                 error("chmod $config{wrapper}: $!");
 772         }
 773         print "successfully generated $config{wrapper}\n";
 774 } #}}}
 775
 776 sub misctemplate ($$) { #{{{
 777         my $title=shift;
 778         my $pagebody=shift;
 779
 780         my $template=HTML::Template->new(
 781                 filename => "$config{templatedir}/misc.tmpl"
 782         );
 783         $template->param(
 784                 title => $title,
 785                 indexlink => indexlink(),
 786                 wikiname => $config{wikiname},
 787                 pagebody => $pagebody,
 788         );
 789         return $template->output;
 790 }#}}}
 791
 792 sub cgi_recentchanges ($) { #{{{
 793         my $q=shift;
 794
 795         my $template=HTML::Template->new(
 796                 filename => "$config{templatedir}/recentchanges.tmpl"
 797         );
 798         $template->param(
 799                 title => "RecentChanges",
 800                 indexlink => indexlink(),
 801                 wikiname => $config{wikiname},
 802                 changelog => [rcs_recentchanges(100)],
 803         );
 804         print $q->header, $template->output;
 805 } #}}}
 806
 807 sub userinfo_get ($$) { #{{{
 808         my $user=shift;
 809         my $field=shift;
 810
 811         eval q{use Storable};
 812         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 813         if (! defined $userdata || ! ref $userdata ||
 814             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 815                 return "";
 816         }
 817         return $userdata->{$user}->{$field};
 818 } #}}}
 819
 820 sub userinfo_set ($$) { #{{{
 821         my $user=shift;
 822         my $info=shift;
 823
 824         eval q{use Storable};
 825         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 826         if (! defined $userdata || ! ref $userdata) {
 827                 $userdata={};
 828         }
 829         $userdata->{$user}=$info;
 830         my $oldmask=umask(077);
 831         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 832         umask($oldmask);
 833         return $ret;
 834 } #}}}
 835
 836 sub cgi_signin ($$) { #{{{
 837         my $q=shift;
 838         my $session=shift;
 839
 840         eval q{use CGI::FormBuilder};
 841         my $form = CGI::FormBuilder->new(
 842                 title => "$config{wikiname} signin",
 843                 fields => [qw(do page from name password confirm_password email)],
 844                 header => 1,
 845                 method => 'POST',
 846                 validate => {
 847                         confirm_password => {
 848                                 perl => q{eq $form->field("password")},
 849                         },
 850                         email => 'EMAIL',
 851                 },
 852                 required => 'NONE',
 853                 javascript => 0,
 854                 params => $q,
 855                 action => $q->request_uri,
 856                 header => 0,
 857                 template => (-e "$config{templatedir}/signin.tmpl" ?
 858                               "$config{templatedir}/signin.tmpl" : "")
 859         );
 860
 861         $form->field(name => "name", required => 0);
 862         $form->field(name => "do", type => "hidden");
 863         $form->field(name => "page", type => "hidden");
 864         $form->field(name => "from", type => "hidden");
 865         $form->field(name => "password", type => "password", required => 0);
 866         $form->field(name => "confirm_password", type => "password", required => 0);
 867         $form->field(name => "email", required => 0);
 868         if ($q->param("do") ne "signin") {
 869                 $form->text("You need to log in before you can edit pages.");
 870         }
 871
 872         if ($form->submitted) {
 873                 # Set required fields based on how form was submitted.
 874                 my %required=(
 875                         "Login" => [qw(name password)],
 876                         "Register" => [qw(name password confirm_password email)],
 877                         "Mail Password" => [qw(name)],
 878                 );
 879                 foreach my $opt (@{$required{$form->submitted}}) {
 880                         $form->field(name => $opt, required => 1);
 881                 }
 882
 883                 # Validate password differently depending on how
 884                 # form was submitted.
 885                 if ($form->submitted eq 'Login') {
 886                         $form->field(
 887                                 name => "password",
 888                                 validate => sub {
 889                                         length $form->field("name") &&
 890                                         shift eq userinfo_get($form->field("name"), 'password');
 891                                 },
 892                         );
 893                         $form->field(name => "name", validate => '/^\w+$/');
 894                 }
 895                 else {
 896                         $form->field(name => "password", validate => 'VALUE');
 897                 }
 898                 # And make sure the entered name exists when logging
 899                 # in or sending email, and does not when registering.
 900                 if ($form->submitted eq 'Register') {
 901                         $form->field(
 902                                 name => "name",
 903                                 validate => sub {
 904                                         my $name=shift;
 905                                         length $name &&
 906                                         ! userinfo_get($name, "regdate");
 907                                 },
 908                         );
 909                 }
 910                 else {
 911                         $form->field(
 912                                 name => "name",
 913                                 validate => sub {
 914                                         my $name=shift;
 915                                         length $name &&
 916                                         userinfo_get($name, "regdate");
 917                                 },
 918                         );
 919                 }
 920         }
 921         else {
 922                 # First time settings.
 923                 $form->field(name => "name", comment => "use FirstnameLastName");
 924                 $form->field(name => "confirm_password", comment => "(only needed");
 925                 $form->field(name => "email",            comment => "for registration)");
 926                 if ($session->param("name")) {
 927                         $form->field(name => "name", value => $session->param("name"));
 928                 }
 929         }
 930
 931         if ($form->submitted && $form->validate) {
 932                 if ($form->submitted eq 'Login') {
 933                         $session->param("name", $form->field("name"));
 934                         if (defined $form->field("do") &&
 935                             $form->field("do") ne 'signin') {
 936                                 print $q->redirect(
 937                                         "$config{cgiurl}?do=".$form->field("do").
 938                                         "&page=".$form->field("page").
 939                                         "&from=".$form->field("from"));;
 940                         }
 941                         else {
 942                                 print $q->redirect($config{url});
 943                         }
 944                 }
 945                 elsif ($form->submitted eq 'Register') {
 946                         my $user_name=$form->field('name');
 947                         if (userinfo_set($user_name, {
 948                                            'email' => $form->field('email'),
 949                                            'password' => $form->field('password'),
 950                                            'regdate' => time
 951                                          })) {
 952                                 $form->field(name => "confirm_password", type => "hidden");
 953                                 $form->field(name => "email", type => "hidden");
 954                                 $form->text("Registration successful. Now you can Login.");
 955                                 print $session->header();
 956                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
 957                         }
 958                         else {
 959                                 error("Error saving registration.");
 960                         }
 961                 }
 962                 elsif ($form->submitted eq 'Mail Password') {
 963                         my $user_name=$form->field("name");
 964                         my $template=HTML::Template->new(
 965                                 filename => "$config{templatedir}/passwordmail.tmpl"
 966                         );
 967                         $template->param(
 968                                 user_name => $user_name,
 969                                 user_password => userinfo_get($user_name, "password"),
 970                                 wikiurl => $config{url},
 971                                 wikiname => $config{wikiname},
 972                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
 973                         );
 974
 975                         eval q{use Mail::Sendmail};
 976                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
 977                         sendmail(
 978                                 To => userinfo_get($user_name, "email"),
 979                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
 980                                 Subject => "$config{wikiname} information",
 981                                 Message => $template->output,
 982                         ) or error("Failed to send mail");
 983
 984                         $form->text("Your password has been emailed to you.");
 985                         $form->field(name => "name", required => 0);
 986                         print $session->header();
 987                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
 988                 }
 989         }
 990         else {
 991                 print $session->header();
 992                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
 993         }
 994 } #}}}
 995
 996 sub cgi_editpage ($$) { #{{{
 997         my $q=shift;
 998         my $session=shift;
 999
1000         eval q{use CGI::FormBuilder};
1001         my $form = CGI::FormBuilder->new(
1002                 fields => [qw(do from page content comments)],
1003                 header => 1,
1004                 method => 'POST',
1005                 validate => {
1006                         content => '/.+/',
1007                 },
1008                 required => [qw{content}],
1009                 javascript => 0,
1010                 params => $q,
1011                 action => $q->request_uri,
1012                 table => 0,
1013                 template => "$config{templatedir}/editpage.tmpl"
1014         );
1015
1016         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1017         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1018             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1019                 error("bad page name");
1020         }
1021         $page=lc($page);
1022
1023         $form->field(name => "do", type => 'hidden');
1024         $form->field(name => "from", type => 'hidden');
1025         $form->field(name => "page", value => "$page", force => 1);
1026         $form->field(name => "comments", type => "text", size => 80);
1027         $form->field(name => "content", type => "textarea", rows => 20,
1028                 cols => 80);
1029
1030         if ($form->submitted eq "Cancel") {
1031                 print $q->redirect("$config{url}/".htmlpage($page));
1032                 return;
1033         }
1034         if (! $form->submitted || ! $form->validate) {
1035                 if ($form->field("do") eq "create") {
1036                         if (exists $pagesources{lc($page)}) {
1037                                 # hmm, someone else made the page in the
1038                                 # meantime?
1039                                 print $q->redirect("$config{url}/".htmlpage($page));
1040                                 return;
1041                         }
1042
1043                         my @page_locs;
1044                         my $best_loc;
1045                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1046                         if (! defined $from || ! length $from ||
1047                             $from ne $form->param('from') ||
1048                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1049                                 @page_locs=$best_loc=$page;
1050                         }
1051                         else {
1052                                 my $dir=$from."/";
1053                                 $dir=~s![^/]+/$!!;
1054                                 push @page_locs, $dir.$page;
1055                                 push @page_locs, "$from/$page";
1056                                 $best_loc="$from/$page";
1057                                 while (length $dir) {
1058                                         $dir=~s![^/]+/$!!;
1059                                         push @page_locs, $dir.$page;
1060                                 }
1061
1062                                 @page_locs = grep { ! exists
1063                                         $pagesources{lc($_)} } @page_locs;
1064                         }
1065
1066                         $form->tmpl_param("page_select", 1);
1067                         $form->field(name => "page", type => 'select',
1068                                 options => \@page_locs, value => $best_loc);
1069                         $form->title("creating $page");
1070                 }
1071                 elsif ($form->field("do") eq "edit") {
1072                         my $content="";
1073                         if (exists $pagesources{lc($page)}) {
1074                                 $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1075                                 $content=~s/\n/\r\n/g;
1076                         }
1077                         $form->tmpl_param("page_select", 0);
1078                         $form->field(name => "content", value => $content,
1079                                 force => 1);
1080                         $form->field(name => "page", type => 'hidden');
1081                         $form->title("editing $page");
1082                 }
1083
1084                 $form->tmpl_param("can_commit", $config{svn});
1085                 $form->tmpl_param("indexlink", indexlink());
1086                 print $form->render(submit => ["Save Page", "Cancel"]);
1087         }
1088         else {
1089                 # save page
1090                 my $file=$page.$config{default_pageext};
1091                 my $newfile=1;
1092                 if (exists $pagesources{lc($page)}) {
1093                         $file=$pagesources{lc($page)};
1094                         $newfile=0;
1095                 }
1096
1097                 my $content=$form->field('content');
1098                 $content=~s/\r\n/\n/g;
1099                 $content=~s/\r/\n/g;
1100                 writefile("$config{srcdir}/$file", $content);
1101
1102                 my $message="web commit ";
1103                 if ($session->param("name")) {
1104                         $message.="by ".$session->param("name");
1105                 }
1106                 else {
1107                         $message.="from $ENV{REMOTE_ADDR}";
1108                 }
1109                 if (defined $form->field('comments') &&
1110                     length $form->field('comments')) {
1111                         $message.=": ".$form->field('comments');
1112                 }
1113
1114                 if ($config{svn}) {
1115                         if ($newfile) {
1116                                 rcs_add($file);
1117                         }
1118                         # presumably the commit will trigger an update
1119                         # of the wiki
1120                         rcs_commit($message);
1121                 }
1122                 else {
1123                         loadindex();
1124                         refresh();
1125                         saveindex();
1126                 }
1127
1128                 # The trailing question mark tries to avoid broken
1129                 # caches and get the most recent version of the page.
1130                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1131         }
1132 } #}}}
1133
1134 sub cgi () { #{{{
1135         eval q{use CGI};
1136         eval q{use CGI::Session};
1137
1138         my $q=CGI->new;
1139
1140         my $do=$q->param('do');
1141         if (! defined $do || ! length $do) {
1142                 error("\"do\" parameter missing");
1143         }
1144
1145         # This does not need a session.
1146         if ($do eq 'recentchanges') {
1147                 cgi_recentchanges($q);
1148                 return;
1149         }
1150
1151         CGI::Session->name("ikiwiki_session");
1152
1153         my $oldmask=umask(077);
1154         my $session = CGI::Session->new("driver:db_file", $q,
1155                 { FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
1156         umask($oldmask);
1157
1158         # Everything below this point needs the user to be signed in.
1159         if ((! $config{anonok} && ! defined $session->param("name") ||
1160                 ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1161                 cgi_signin($q, $session);
1162
1163                 # Force session flush with safe umask.
1164                 my $oldmask=umask(077);
1165                 $session->flush;
1166                 umask($oldmask);
1167
1168                 return;
1169         }
1170
1171         if ($do eq 'create' || $do eq 'edit') {
1172                 cgi_editpage($q, $session);
1173         }
1174         else {
1175                 error("unknown do parameter");
1176         }
1177 } #}}}
1178
1179 sub setup () { # {{{
1180         my $setup=possibly_foolish_untaint($config{setup});
1181         delete $config{setup};
1182         open (IN, $setup) || error("read $setup: $!\n");
1183         local $/=undef;
1184         my $code=<IN>;
1185         ($code)=$code=~/(.*)/s;
1186         close IN;
1187
1188         eval $code;
1189         error($@) if $@;
1190         exit;
1191 } #}}}
1192
1193 # main {{{
1194 lockwiki();
1195 setup() if $config{setup};
1196 if ($config{wrapper}) {
1197         gen_wrapper(%config);
1198         exit;
1199 }
1200 memoize('pagename');
1201 memoize('bestlink');
1202 loadindex() unless $config{rebuild};
1203 if ($config{cgi}) {
1204         cgi();
1205 }
1206 else {
1207         rcs_update() if $config{svn};
1208         refresh();
1209         saveindex();
1210 }
1211 #}}}