ikiwiki

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