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 $page=shift;
 251
 252         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 253                 $1 ? "[[$2]]" : htmllink($page, $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, $page);
 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 unlockwiki () { #{{{
 424         close WIKILOCK;
 425 } #}}}
 426
 427 sub loadindex () { #{{{
 428         open (IN, "$config{srcdir}/.ikiwiki/index") || return;
 429         while (<IN>) {
 430                 $_=possibly_foolish_untaint($_);
 431                 chomp;
 432                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 433                 my $page=pagename($file);
 434                 $pagesources{$page}=$file;
 435                 $oldpagemtime{$page}=$mtime;
 436                 $oldlinks{$page}=[@links];
 437                 $links{$page}=[@links];
 438                 $renderedfiles{$page}=$rendered;
 439         }
 440         close IN;
 441 } #}}}
 442
 443 sub saveindex () { #{{{
 444         if (! -d "$config{srcdir}/.ikiwiki") {
 445                 mkdir("$config{srcdir}/.ikiwiki");
 446         }
 447         open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
 448         foreach my $page (keys %oldpagemtime) {
 449                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 450                         join(" ", @{$links{$page}})."\n"
 451                                 if $oldpagemtime{$page};
 452         }
 453         close OUT;
 454 } #}}}
 455
 456 sub rcs_update () { #{{{
 457         if (-d "$config{srcdir}/.svn") {
 458                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 459                         warn("svn update failed\n");
 460                 }
 461         }
 462 } #}}}
 463
 464 sub rcs_prepedit ($) { #{{{
 465         # Prepares to edit a file under revision control. Returns a token
 466         # that must be passed into rcs_commit when the file is ready
 467         # for committing.
 468         # The file is relative to the srcdir.
 469         my $file=shift;
 470
 471         if (-d "$config{srcdir}/.svn") {
 472                 # For subversion, return the revision of the file when
 473                 # editing begins.
 474                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 475                 return defined $rev ? $rev : "";
 476         }
 477 } #}}}
 478
 479 sub rcs_commit ($$$) { #{{{
 480         # Tries to commit the page; returns undef on _success_ and
 481         # a version of the page with the rcs's conflict markers on failure.
 482         # The file is relative to the srcdir.
 483         my $file=shift;
 484         my $message=shift;
 485         my $rcstoken=shift;
 486
 487         if (-d "$config{srcdir}/.svn") {
 488                 # Check to see if the page has been changed by someone
 489                 # else since rcs_prepedit was called.
 490                 my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
 491                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 492                 if ($rev != $oldrev) {
 493                         # Merge their changes into the file that we've
 494                         # changed.
 495                         chdir($config{srcdir}); # svn merge wants to be here
 496                         if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
 497                                    "$config{srcdir}/$file") != 0) {
 498                                 warn("svn merge -r$oldrev:$rev failed\n");
 499                         }
 500                 }
 501
 502                 if (system("svn", "commit", "--quiet", "-m",
 503                            possibly_foolish_untaint($message),
 504                            "$config{srcdir}/$file") != 0) {
 505                         my $conflict=readfile("$config{srcdir}/$file");
 506                         if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
 507                                 warn("svn revert failed\n");
 508                         }
 509                         return $conflict;
 510                 }
 511         }
 512         return undef # success
 513 } #}}}
 514
 515 sub rcs_add ($) { #{{{
 516         # filename is relative to the root of the srcdir
 517         my $file=shift;
 518
 519         if (-d "$config{srcdir}/.svn") {
 520                 my $parent=dirname($file);
 521                 while (! -d "$config{srcdir}/$parent/.svn") {
 522                         $file=$parent;
 523                         $parent=dirname($file);
 524                 }
 525
 526                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 527                         warn("svn add failed\n");
 528                 }
 529         }
 530 } #}}}
 531
 532 sub svn_info ($$) { #{{{
 533         my $field=shift;
 534         my $file=shift;
 535
 536         my $info=`LANG=C svn info $file`;
 537         my ($ret)=$info=~/^$field: (.*)$/m;
 538         return $ret;
 539 } #}}}
 540
 541 sub rcs_recentchanges ($) { #{{{
 542         my $num=shift;
 543         my @ret;
 544
 545         eval q{use CGI 'escapeHTML'};
 546         eval q{use Date::Parse};
 547         eval q{use Time::Duration};
 548
 549         if (-d "$config{srcdir}/.svn") {
 550                 my $svn_url=svn_info("URL", $config{srcdir});
 551
 552                 # FIXME: currently assumes that the wiki is somewhere
 553                 # under trunk in svn, doesn't support other layouts.
 554                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 555
 556                 my $div=qr/^--------------------+$/;
 557                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 558                 my $state='start';
 559                 my ($rev, $user, $when, @pages, @message);
 560                 foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
 561                         chomp;
 562                         if ($state eq 'start' && /$div/) {
 563                                 $state='header';
 564                         }
 565                         elsif ($state eq 'header' && /$infoline/) {
 566                                 $rev=$1;
 567                                 $user=$2;
 568                                 $when=concise(ago(time - str2time($3)));
 569                         }
 570                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/(.+)$/) {
 571                                 push @pages, { link => htmllink("", pagename($1), 1) }
 572                                         if length $1;
 573                         }
 574                         elsif ($state eq 'header' && /^$/) {
 575                                 $state='body';
 576                         }
 577                         elsif ($state eq 'body' && /$div/) {
 578                                 my $committype="web";
 579                                 if (defined $message[0] &&
 580                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 581                                         $user="$1";
 582                                         $message[0]->{line}=$2;
 583                                 }
 584                                 else {
 585                                         $committype="svn";
 586                                 }
 587
 588                                 push @ret, { rev => $rev,
 589                                         user => htmllink("", $user, 1),
 590                                         committype => $committype,
 591                                         when => $when, message => [@message],
 592                                         pages => [@pages] } if @pages;
 593                                 return @ret if @ret >= $num;
 594
 595                                 $state='header';
 596                                 $rev=$user=$when=undef;
 597                                 @pages=@message=();
 598                         }
 599                         elsif ($state eq 'body') {
 600                                 push @message, {line => escapeHTML($_)},
 601                         }
 602                 }
 603         }
 604
 605         return @ret;
 606 } #}}}
 607
 608 sub prune ($) { #{{{
 609         my $file=shift;
 610
 611         unlink($file);
 612         my $dir=dirname($file);
 613         while (rmdir($dir)) {
 614                 $dir=dirname($dir);
 615         }
 616 } #}}}
 617
 618 sub refresh () { #{{{
 619         # find existing pages
 620         my %exists;
 621         my @files;
 622         eval q{use File::Find};
 623         find({
 624                 no_chdir => 1,
 625                 wanted => sub {
 626                         if (/$config{wiki_file_prune_regexp}/) {
 627                                 no warnings 'once';
 628                                 $File::Find::prune=1;
 629                                 use warnings "all";
 630                         }
 631                         elsif (! -d $_ && ! -l $_) {
 632                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 633                                 if (! defined $f) {
 634                                         warn("skipping bad filename $_\n");
 635                                 }
 636                                 else {
 637                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 638                                         push @files, $f;
 639                                         $exists{pagename($f)}=1;
 640                                 }
 641                         }
 642                 },
 643         }, $config{srcdir});
 644
 645         my %rendered;
 646
 647         # check for added or removed pages
 648         my @add;
 649         foreach my $file (@files) {
 650                 my $page=pagename($file);
 651                 if (! $oldpagemtime{$page}) {
 652                         debug("new page $page");
 653                         push @add, $file;
 654                         $links{$page}=[];
 655                         $pagesources{$page}=$file;
 656                 }
 657         }
 658         my @del;
 659         foreach my $page (keys %oldpagemtime) {
 660                 if (! $exists{$page}) {
 661                         debug("removing old page $page");
 662                         push @del, $pagesources{$page};
 663                         prune($config{destdir}."/".$renderedfiles{$page});
 664                         delete $renderedfiles{$page};
 665                         $oldpagemtime{$page}=0;
 666                         delete $pagesources{$page};
 667                 }
 668         }
 669
 670         # render any updated files
 671         foreach my $file (@files) {
 672                 my $page=pagename($file);
 673
 674                 if (! exists $oldpagemtime{$page} ||
 675                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 676                         debug("rendering changed file $file");
 677                         render($file);
 678                         $rendered{$file}=1;
 679                 }
 680         }
 681
 682         # if any files were added or removed, check to see if each page
 683         # needs an update due to linking to them
 684         # TODO: inefficient; pages may get rendered above and again here;
 685         # problem is the bestlink may have changed and we won't know until
 686         # now
 687         if (@add || @del) {
 688 FILE:           foreach my $file (@files) {
 689                         my $page=pagename($file);
 690                         foreach my $f (@add, @del) {
 691                                 my $p=pagename($f);
 692                                 foreach my $link (@{$links{$page}}) {
 693                                         if (bestlink($page, $link) eq $p) {
 694                                                 debug("rendering $file, which links to $p");
 695                                                 render($file);
 696                                                 $rendered{$file}=1;
 697                                                 next FILE;
 698                                         }
 699                                 }
 700                         }
 701                 }
 702         }
 703
 704         # handle backlinks; if a page has added/removed links, update the
 705         # pages it links to
 706         # TODO: inefficient; pages may get rendered above and again here;
 707         # problem is the backlinks could be wrong in the first pass render
 708         # above
 709         if (%rendered) {
 710                 my %linkchanged;
 711                 foreach my $file (keys %rendered, @del) {
 712                         my $page=pagename($file);
 713                         if (exists $links{$page}) {
 714                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 715                                         if (length $link &&
 716                                             ! exists $oldlinks{$page} ||
 717                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 718                                                 $linkchanged{$link}=1;
 719                                         }
 720                                 }
 721                         }
 722                         if (exists $oldlinks{$page}) {
 723                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 724                                         if (length $link &&
 725                                             ! exists $links{$page} ||
 726                                             ! grep { $_ eq $link } @{$links{$page}}) {
 727                                                 $linkchanged{$link}=1;
 728                                         }
 729                                 }
 730                         }
 731                 }
 732                 foreach my $link (keys %linkchanged) {
 733                         my $linkfile=$pagesources{$link};
 734                         if (defined $linkfile) {
 735                                 debug("rendering $linkfile, to update its backlinks");
 736                                 render($linkfile);
 737                         }
 738                 }
 739         }
 740 } #}}}
 741
 742 sub gen_wrapper (@) { #{{{
 743         my %config=(@_);
 744         eval q{use Cwd 'abs_path'};
 745         $config{srcdir}=abs_path($config{srcdir});
 746         $config{destdir}=abs_path($config{destdir});
 747         my $this=abs_path($0);
 748         if (! -x $this) {
 749                 error("$this doesn't seem to be executable");
 750         }
 751
 752         if ($config{setup}) {
 753                 error("cannot create a wrapper that uses a setup file");
 754         }
 755
 756         my @params=($config{srcdir}, $config{templatedir}, $config{destdir},
 757                 "--wikiname=$config{wikiname}");
 758         push @params, "--verbose" if $config{verbose};
 759         push @params, "--rebuild" if $config{rebuild};
 760         push @params, "--nosvn" if !$config{svn};
 761         push @params, "--cgi" if $config{cgi};
 762         push @params, "--url=$config{url}" if length $config{url};
 763         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 764         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 765         push @params, "--anonok" if $config{anonok};
 766         my $params=join(" ", @params);
 767         my $call='';
 768         foreach my $p ($this, $this, @params) {
 769                 $call.=qq{"$p", };
 770         }
 771         $call.="NULL";
 772
 773         my @envsave;
 774         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 775                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 776                        HTTP_COOKIE} if $config{cgi};
 777         my $envsave="";
 778         foreach my $var (@envsave) {
 779                 $envsave.=<<"EOF"
 780         if ((s=getenv("$var")))
 781                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 782 EOF
 783         }
 784
 785         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 786         print OUT <<"EOF";
 787 /* A wrapper for ikiwiki, can be safely made suid. */
 788 #define _GNU_SOURCE
 789 #include <stdio.h>
 790 #include <unistd.h>
 791 #include <stdlib.h>
 792 #include <string.h>
 793
 794 extern char **environ;
 795
 796 int main (int argc, char **argv) {
 797         /* Sanitize environment. */
 798         char *s;
 799         char *newenviron[$#envsave+3];
 800         int i=0;
 801 $envsave
 802         newenviron[i++]="HOME=$ENV{HOME}";
 803         newenviron[i]=NULL;
 804         environ=newenviron;
 805
 806         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 807                 printf("$params\\n");
 808                 exit(0);
 809         }
 810
 811         execl($call);
 812         perror("failed to run $this");
 813         exit(1);
 814 }
 815 EOF
 816         close OUT;
 817         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 818                 error("failed to compile ikiwiki-wrap.c");
 819         }
 820         unlink("ikiwiki-wrap.c");
 821         if (defined $config{wrappermode} &&
 822             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 823                 error("chmod $config{wrapper}: $!");
 824         }
 825         print "successfully generated $config{wrapper}\n";
 826 } #}}}
 827
 828 sub misctemplate ($$) { #{{{
 829         my $title=shift;
 830         my $pagebody=shift;
 831
 832         my $template=HTML::Template->new(
 833                 filename => "$config{templatedir}/misc.tmpl"
 834         );
 835         $template->param(
 836                 title => $title,
 837                 indexlink => indexlink(),
 838                 wikiname => $config{wikiname},
 839                 pagebody => $pagebody,
 840         );
 841         return $template->output;
 842 }#}}}
 843
 844 sub cgi_recentchanges ($) { #{{{
 845         my $q=shift;
 846
 847         my $template=HTML::Template->new(
 848                 filename => "$config{templatedir}/recentchanges.tmpl"
 849         );
 850         $template->param(
 851                 title => "RecentChanges",
 852                 indexlink => indexlink(),
 853                 wikiname => $config{wikiname},
 854                 changelog => [rcs_recentchanges(100)],
 855         );
 856         print $q->header, $template->output;
 857 } #}}}
 858
 859 sub userinfo_get ($$) { #{{{
 860         my $user=shift;
 861         my $field=shift;
 862
 863         eval q{use Storable};
 864         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 865         if (! defined $userdata || ! ref $userdata ||
 866             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 867                 return "";
 868         }
 869         return $userdata->{$user}->{$field};
 870 } #}}}
 871
 872 sub userinfo_set ($$) { #{{{
 873         my $user=shift;
 874         my $info=shift;
 875
 876         eval q{use Storable};
 877         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 878         if (! defined $userdata || ! ref $userdata) {
 879                 $userdata={};
 880         }
 881         $userdata->{$user}=$info;
 882         my $oldmask=umask(077);
 883         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 884         umask($oldmask);
 885         return $ret;
 886 } #}}}
 887
 888 sub cgi_signin ($$) { #{{{
 889         my $q=shift;
 890         my $session=shift;
 891
 892         eval q{use CGI::FormBuilder};
 893         my $form = CGI::FormBuilder->new(
 894                 title => "$config{wikiname} signin",
 895                 fields => [qw(do page from name password confirm_password email)],
 896                 header => 1,
 897                 method => 'POST',
 898                 validate => {
 899                         confirm_password => {
 900                                 perl => q{eq $form->field("password")},
 901                         },
 902                         email => 'EMAIL',
 903                 },
 904                 required => 'NONE',
 905                 javascript => 0,
 906                 params => $q,
 907                 action => $q->request_uri,
 908                 header => 0,
 909                 template => (-e "$config{templatedir}/signin.tmpl" ?
 910                               "$config{templatedir}/signin.tmpl" : "")
 911         );
 912
 913         $form->field(name => "name", required => 0);
 914         $form->field(name => "do", type => "hidden");
 915         $form->field(name => "page", type => "hidden");
 916         $form->field(name => "from", type => "hidden");
 917         $form->field(name => "password", type => "password", required => 0);
 918         $form->field(name => "confirm_password", type => "password", required => 0);
 919         $form->field(name => "email", required => 0);
 920         if ($q->param("do") ne "signin") {
 921                 $form->text("You need to log in before you can edit pages.");
 922         }
 923
 924         if ($form->submitted) {
 925                 # Set required fields based on how form was submitted.
 926                 my %required=(
 927                         "Login" => [qw(name password)],
 928                         "Register" => [qw(name password confirm_password email)],
 929                         "Mail Password" => [qw(name)],
 930                 );
 931                 foreach my $opt (@{$required{$form->submitted}}) {
 932                         $form->field(name => $opt, required => 1);
 933                 }
 934
 935                 # Validate password differently depending on how
 936                 # form was submitted.
 937                 if ($form->submitted eq 'Login') {
 938                         $form->field(
 939                                 name => "password",
 940                                 validate => sub {
 941                                         length $form->field("name") &&
 942                                         shift eq userinfo_get($form->field("name"), 'password');
 943                                 },
 944                         );
 945                         $form->field(name => "name", validate => '/^\w+$/');
 946                 }
 947                 else {
 948                         $form->field(name => "password", validate => 'VALUE');
 949                 }
 950                 # And make sure the entered name exists when logging
 951                 # in or sending email, and does not when registering.
 952                 if ($form->submitted eq 'Register') {
 953                         $form->field(
 954                                 name => "name",
 955                                 validate => sub {
 956                                         my $name=shift;
 957                                         length $name &&
 958                                         ! userinfo_get($name, "regdate");
 959                                 },
 960                         );
 961                 }
 962                 else {
 963                         $form->field(
 964                                 name => "name",
 965                                 validate => sub {
 966                                         my $name=shift;
 967                                         length $name &&
 968                                         userinfo_get($name, "regdate");
 969                                 },
 970                         );
 971                 }
 972         }
 973         else {
 974                 # First time settings.
 975                 $form->field(name => "name", comment => "use FirstnameLastName");
 976                 $form->field(name => "confirm_password", comment => "(only needed");
 977                 $form->field(name => "email",            comment => "for registration)");
 978                 if ($session->param("name")) {
 979                         $form->field(name => "name", value => $session->param("name"));
 980                 }
 981         }
 982
 983         if ($form->submitted && $form->validate) {
 984                 if ($form->submitted eq 'Login') {
 985                         $session->param("name", $form->field("name"));
 986                         if (defined $form->field("do") &&
 987                             $form->field("do") ne 'signin') {
 988                                 print $q->redirect(
 989                                         "$config{cgiurl}?do=".$form->field("do").
 990                                         "&page=".$form->field("page").
 991                                         "&from=".$form->field("from"));;
 992                         }
 993                         else {
 994                                 print $q->redirect($config{url});
 995                         }
 996                 }
 997                 elsif ($form->submitted eq 'Register') {
 998                         my $user_name=$form->field('name');
 999                         if (userinfo_set($user_name, {
1000                                            'email' => $form->field('email'),
1001                                            'password' => $form->field('password'),
1002                                            'regdate' => time
1003                                          })) {
1004                                 $form->field(name => "confirm_password", type => "hidden");
1005                                 $form->field(name => "email", type => "hidden");
1006                                 $form->text("Registration successful. Now you can Login.");
1007                                 print $session->header();
1008                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
1009                         }
1010                         else {
1011                                 error("Error saving registration.");
1012                         }
1013                 }
1014                 elsif ($form->submitted eq 'Mail Password') {
1015                         my $user_name=$form->field("name");
1016                         my $template=HTML::Template->new(
1017                                 filename => "$config{templatedir}/passwordmail.tmpl"
1018                         );
1019                         $template->param(
1020                                 user_name => $user_name,
1021                                 user_password => userinfo_get($user_name, "password"),
1022                                 wikiurl => $config{url},
1023                                 wikiname => $config{wikiname},
1024                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
1025                         );
1026
1027                         eval q{use Mail::Sendmail};
1028                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
1029                         sendmail(
1030                                 To => userinfo_get($user_name, "email"),
1031                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
1032                                 Subject => "$config{wikiname} information",
1033                                 Message => $template->output,
1034                         ) or error("Failed to send mail");
1035
1036                         $form->text("Your password has been emailed to you.");
1037                         $form->field(name => "name", required => 0);
1038                         print $session->header();
1039                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1040                 }
1041         }
1042         else {
1043                 print $session->header();
1044                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1045         }
1046 } #}}}
1047
1048 sub cgi_editpage ($$) { #{{{
1049         my $q=shift;
1050         my $session=shift;
1051
1052         eval q{use CGI::FormBuilder};
1053         my $form = CGI::FormBuilder->new(
1054                 fields => [qw(do rcsinfo from page content comments)],
1055                 header => 1,
1056                 method => 'POST',
1057                 validate => {
1058                         content => '/.+/',
1059                 },
1060                 required => [qw{content}],
1061                 javascript => 0,
1062                 params => $q,
1063                 action => $q->request_uri,
1064                 table => 0,
1065                 template => "$config{templatedir}/editpage.tmpl"
1066         );
1067         my @buttons=("Save Page", "Preview", "Cancel");
1068
1069         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1070         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1071             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1072                 error("bad page name");
1073         }
1074         $page=lc($page);
1075
1076         my $file=$page.$config{default_pageext};
1077         my $newfile=1;
1078         if (exists $pagesources{lc($page)}) {
1079                 $file=$pagesources{lc($page)};
1080                 $newfile=0;
1081         }
1082
1083         $form->field(name => "do", type => 'hidden');
1084         $form->field(name => "from", type => 'hidden');
1085         $form->field(name => "rcsinfo", type => 'hidden');
1086         $form->field(name => "page", value => "$page", force => 1);
1087         $form->field(name => "comments", type => "text", size => 80);
1088         $form->field(name => "content", type => "textarea", rows => 20,
1089                 cols => 80);
1090         $form->tmpl_param("can_commit", $config{svn});
1091         $form->tmpl_param("indexlink", indexlink());
1092         $form->tmpl_param("helponformattinglink",
1093                 htmllink("", "HelpOnFormatting", 1));
1094         if (! $form->submitted) {
1095                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1096                         force => 1);
1097         }
1098
1099         if ($form->submitted eq "Cancel") {
1100                 print $q->redirect("$config{url}/".htmlpage($page));
1101                 return;
1102         }
1103         elsif ($form->submitted eq "Preview") {
1104                 $form->tmpl_param("page_preview",
1105                         htmlize($config{default_pageext},
1106                                 linkify($form->field('content'), $page)));
1107         }
1108         else {
1109                 $form->tmpl_param("page_preview", "");
1110         }
1111         $form->tmpl_param("page_conflict", "");
1112
1113         if (! $form->submitted || $form->submitted eq "Preview" ||
1114             ! $form->validate) {
1115                 if ($form->field("do") eq "create") {
1116                         if (exists $pagesources{lc($page)}) {
1117                                 # hmm, someone else made the page in the
1118                                 # meantime?
1119                                 print $q->redirect("$config{url}/".htmlpage($page));
1120                                 return;
1121                         }
1122
1123                         my @page_locs;
1124                         my $best_loc;
1125                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1126                         if (! defined $from || ! length $from ||
1127                             $from ne $form->param('from') ||
1128                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1129                                 @page_locs=$best_loc=$page;
1130                         }
1131                         else {
1132                                 my $dir=$from."/";
1133                                 $dir=~s![^/]+/$!!;
1134                                 push @page_locs, $dir.$page;
1135                                 push @page_locs, "$from/$page";
1136                                 $best_loc="$from/$page";
1137                                 while (length $dir) {
1138                                         $dir=~s![^/]+/$!!;
1139                                         push @page_locs, $dir.$page;
1140                                 }
1141
1142                                 @page_locs = grep { ! exists
1143                                         $pagesources{lc($_)} } @page_locs;
1144                         }
1145
1146                         $form->tmpl_param("page_select", 1);
1147                         $form->field(name => "page", type => 'select',
1148                                 options => \@page_locs, value => $best_loc);
1149                         $form->title("creating $page");
1150                 }
1151                 elsif ($form->field("do") eq "edit") {
1152                         if (! defined $form->field('content') ||
1153                             ! length $form->field('content')) {
1154                                 my $content="";
1155                                 if (exists $pagesources{lc($page)}) {
1156                                                 $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1157                                         $content=~s/\n/\r\n/g;
1158                                 }
1159                                 $form->field(name => "content", value => $content,
1160                                         force => 1);
1161                         }
1162                         $form->tmpl_param("page_select", 0);
1163                         $form->field(name => "page", type => 'hidden');
1164                         $form->title("editing $page");
1165                 }
1166
1167                 print $form->render(submit => \@buttons);
1168         }
1169         else {
1170                 # save page
1171                 my $content=$form->field('content');
1172                 $content=~s/\r\n/\n/g;
1173                 $content=~s/\r/\n/g;
1174                 writefile("$config{srcdir}/$file", $content);
1175
1176                 my $message="web commit ";
1177                 if ($session->param("name")) {
1178                         $message.="by ".$session->param("name");
1179                 }
1180                 else {
1181                         $message.="from $ENV{REMOTE_ADDR}";
1182                 }
1183                 if (defined $form->field('comments') &&
1184                     length $form->field('comments')) {
1185                         $message.=": ".$form->field('comments');
1186                 }
1187
1188                 if ($config{svn}) {
1189                         if ($newfile) {
1190                                 rcs_add($file);
1191                         }
1192                         # prevent deadlock with post-commit hook
1193                         unlockwiki();
1194                         # presumably the commit will trigger an update
1195                         # of the wiki
1196                         my $conflict=rcs_commit($file, $message,
1197                                 $form->field("rcsinfo"));
1198
1199                         if (defined $conflict) {
1200                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1201                                         force => 1);
1202                                 $form->tmpl_param("page_conflict", 1);
1203                                 $form->field("content", value => $conflict, force => 1);
1204                                 $form->field("do", "edit)");
1205                                 $form->tmpl_param("page_select", 0);
1206                                 $form->field(name => "page", type => 'hidden');
1207                                 $form->title("editing $page");
1208                                 print $form->render(submit => \@buttons);
1209                                 return;
1210                         }
1211                 }
1212                 else {
1213                         loadindex();
1214                         refresh();
1215                         saveindex();
1216                 }
1217
1218                 # The trailing question mark tries to avoid broken
1219                 # caches and get the most recent version of the page.
1220                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1221         }
1222 } #}}}
1223
1224 sub cgi () { #{{{
1225         eval q{use CGI};
1226         eval q{use CGI::Session};
1227
1228         my $q=CGI->new;
1229
1230         my $do=$q->param('do');
1231         if (! defined $do || ! length $do) {
1232                 error("\"do\" parameter missing");
1233         }
1234
1235         # This does not need a session.
1236         if ($do eq 'recentchanges') {
1237                 cgi_recentchanges($q);
1238                 return;
1239         }
1240
1241         CGI::Session->name("ikiwiki_session");
1242
1243         my $oldmask=umask(077);
1244         my $session = CGI::Session->new("driver:db_file", $q,
1245                 { FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
1246         umask($oldmask);
1247
1248         # Everything below this point needs the user to be signed in.
1249         if ((! $config{anonok} && ! defined $session->param("name") ||
1250                 ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1251                 cgi_signin($q, $session);
1252
1253                 # Force session flush with safe umask.
1254                 my $oldmask=umask(077);
1255                 $session->flush;
1256                 umask($oldmask);
1257
1258                 return;
1259         }
1260
1261         if ($do eq 'create' || $do eq 'edit') {
1262                 cgi_editpage($q, $session);
1263         }
1264         else {
1265                 error("unknown do parameter");
1266         }
1267 } #}}}
1268
1269 sub setup () { # {{{
1270         my $setup=possibly_foolish_untaint($config{setup});
1271         delete $config{setup};
1272         open (IN, $setup) || error("read $setup: $!\n");
1273         local $/=undef;
1274         my $code=<IN>;
1275         ($code)=$code=~/(.*)/s;
1276         close IN;
1277
1278         eval $code;
1279         error($@) if $@;
1280         exit;
1281 } #}}}
1282
1283 # main {{{
1284 lockwiki();
1285 setup() if $config{setup};
1286 if ($config{wrapper}) {
1287         gen_wrapper(%config);
1288         exit;
1289 }
1290 memoize('pagename');
1291 memoize('bestlink');
1292 loadindex() unless $config{rebuild};
1293 if ($config{cgi}) {
1294         cgi();
1295 }
1296 else {
1297         rcs_update() if $config{svn};
1298         refresh();
1299         saveindex();
1300 }
1301 #}}}