IkiWiki.pm

   1 #!/usr/bin/perl
   2
   3 package IkiWiki;
   4
   5 use warnings;
   6 use strict;
   7 use Encode;
   8 use HTML::Entities;
   9 use URI::Escape q{uri_escape_utf8};
  10 use POSIX;
  11 use Storable;
  12 use open qw{:utf8 :std};
  13
  14 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
  15             %pagestate %renderedfiles %oldrenderedfiles %pagesources
  16             %destsources %depends %hooks %forcerebuild $gettext_obj
  17             %loaded_plugins};
  18
  19 use Exporter q{import};
  20 our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
  21                  bestlink htmllink readfile writefile pagetype srcfile pagename
  22                  displaytime will_render gettext urlto targetpage
  23                  add_underlay
  24                  %config %links %pagestate %renderedfiles
  25                  %pagesources %destsources);
  26 our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
  27 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
  28 my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  29
  30 # Optimisation.
  31 use Memoize;
  32 memoize("abs2rel");
  33 memoize("pagespec_translate");
  34 memoize("file_pruned");
  35
  36 sub getsetup () { #{{{
  37         wikiname => {
  38                 type => "string",
  39                 default => "wiki",
  40                 description => "name of the wiki",
  41                 safe => 1,
  42                 rebuild => 1,
  43         },
  44         srcdir => {
  45                 type => "string",
  46                 default => undef,
  47                 example => "$ENV{HOME}/wiki",
  48                 description => "where the source of the wiki is located",
  49                 safe => 0, # path
  50                 rebuild => 1,
  51         },
  52         destdir => {
  53                 type => "string",
  54                 default => undef,
  55                 example => "/var/www/wiki",
  56                 description => "where to build the wiki",
  57                 safe => 0, # path
  58                 rebuild => 1,
  59         },
  60         adminuser => {
  61                 type => "string",
  62                 default => [],
  63                 description => "user names of wiki admins",
  64                 safe => 1,
  65                 rebuild => 0,
  66         },
  67         adminemail => {
  68                 type => "string",
  69                 default => undef,
  70                 example => 'me@example.com',
  71                 description => "contact email for wiki",
  72                 safe => 1,
  73                 rebuild => 0,
  74         },
  75         url => {
  76                 type => "string",
  77                 default => '',
  78                 example => "http://example.com/wiki",
  79                 description => "base url to the wiki",
  80                 safe => 1,
  81                 rebuild => 1,
  82         },
  83         cgiurl => {
  84                 type => "string",
  85                 default => '',
  86                 example => "http://example.com/wiki/ikiwiki.cgi",
  87                 description => "url to the ikiwiki.cgi",
  88                 safe => 1,
  89                 rebuild => 1,
  90         },
  91         cgi_wrapper => {
  92                 type => "string",
  93                 default => '',
  94                 example => "/var/www/wiki/ikiwiki.cgi",
  95                 description => "cgi wrapper to generate",
  96                 safe => 0, # file
  97                 rebuild => 0,
  98         },
  99         cgi_wrappermode => {
 100                 type => "string",
 101                 default => '06755',
 102                 description => "mode for cgi_wrapper (can safely be made suid)",
 103                 safe => 0,
 104                 rebuild => 0,
 105         },
 106         rcs => {
 107                 type => "string",
 108                 default => '',
 109                 description => "rcs backend to use",
 110                 safe => 0, # don't allow overriding
 111                 rebuild => 0,
 112         },
 113         default_plugins => {
 114                 type => "internal",
 115                 default => [qw{mdwn link inline htmlscrubber passwordauth
 116                                 openid signinedit lockedit conditional
 117                                 recentchanges parentlinks}],
 118                 description => "plugins to enable by default",
 119                 safe => 0,
 120                 rebuild => 1,
 121         },
 122         add_plugins => {
 123                 type => "string",
 124                 default => [],
 125                 description => "plugins to add to the default configuration",
 126                 safe => 1,
 127                 rebuild => 1,
 128         },
 129         disable_plugins => {
 130                 type => "string",
 131                 default => [],
 132                 description => "plugins to disable",
 133                 safe => 1,
 134                 rebuild => 1,
 135         },
 136         templatedir => {
 137                 type => "string",
 138                 default => "$installdir/share/ikiwiki/templates",
 139                 description => "location of template files",
 140                 safe => 0, # path
 141                 rebuild => 1,
 142         },
 143         underlaydir => {
 144                 type => "string",
 145                 default => "$installdir/share/ikiwiki/basewiki",
 146                 description => "base wiki source location",
 147                 safe => 0, # path
 148                 rebuild => 0,
 149         },
 150         wrappers => {
 151                 type => "internal",
 152                 default => [],
 153                 description => "wrappers to generate",
 154                 safe => 0,
 155                 rebuild => 0,
 156         },
 157         underlaydirs => {
 158                 type => "internal",
 159                 default => [],
 160                 description => "additional underlays to use",
 161                 safe => 0,
 162                 rebuild => 0,
 163         },
 164         verbose => {
 165                 type => "boolean",
 166                 default => 0,
 167                 description => "display verbose messages when building?",
 168                 safe => 1,
 169                 rebuild => 0,
 170         },
 171         syslog => {
 172                 type => "boolean",
 173                 default => 0,
 174                 description => "log to syslog?",
 175                 safe => 1,
 176                 rebuild => 0,
 177         },
 178         usedirs => {
 179                 type => "boolean",
 180                 default => 1,
 181                 description => "create output files named page/index.html?",
 182                 safe => 0, # changing requires manual transition
 183                 rebuild => 1,
 184         },
 185         prefix_directives => {
 186                 type => "boolean",
 187                 default => 0,
 188                 description => "use '!'-prefixed preprocessor directives?",
 189                 safe => 0, # changing requires manual transition
 190                 rebuild => 1,
 191         },
 192         discussion => {
 193                 type => "boolean",
 194                 default => 1,
 195                 description => "enable Discussion pages?",
 196                 safe => 1,
 197                 rebuild => 1,
 198         },
 199         default_pageext => {
 200                 type => "string",
 201                 default => "mdwn",
 202                 description => "extension to use for new pages",
 203                 safe => 0, # not sanitized
 204                 rebuild => 0,
 205         },
 206         htmlext => {
 207                 type => "string",
 208                 default => "html",
 209                 description => "extension to use for html files",
 210                 safe => 0, # not sanitized
 211                 rebuild => 1,
 212         },
 213         timeformat => {
 214                 type => "string",
 215                 default => '%c',
 216                 description => "strftime format string to display date",
 217                 safe => 1,
 218                 rebuild => 1,
 219         },
 220         locale => {
 221                 type => "string",
 222                 default => undef,
 223                 example => "en_US.UTF-8",
 224                 description => "UTF-8 locale to use",
 225                 safe => 0,
 226                 rebuild => 1,
 227         },
 228         sslcookie => {
 229                 type => "boolean",
 230                 default => 0,
 231                 description => "only send cookies over SSL connections?",
 232                 safe => 1,
 233                 rebuild => 0,
 234         },
 235         userdir => {
 236                 type => "string",
 237                 default => "",
 238                 example => "users",
 239                 description => "put user pages below specified page",
 240                 safe => 1,
 241                 rebuild => 1,
 242         },
 243         numbacklinks => {
 244                 type => "integer",
 245                 default => 10,
 246                 description => "how many backlinks to show before hiding excess (0 to show all)",
 247                 safe => 1,
 248                 rebuild => 1,
 249         },
 250         hardlink => {
 251                 type => "boolean",
 252                 default => 0,
 253                 description => "attempt to hardlink source files? (optimisation for large files)",
 254                 safe => 0, # paranoia
 255                 rebuild => 0,
 256         },
 257         umask => {
 258                 type => "integer",
 259                 description => "",
 260                 example => "022",
 261                 description => "force ikiwiki to use a particular umask",
 262                 safe => 0, # paranoia
 263                 rebuild => 0,
 264         },
 265         libdir => {
 266                 type => "string",
 267                 default => "",
 268                 example => "$ENV{HOME}/.ikiwiki/",
 269                 description => "extra library and plugin directory",
 270                 safe => 0, # directory
 271                 rebuild => 0,
 272         },
 273         ENV => {
 274                 type => "string",
 275                 default => {},
 276                 description => "environment variables",
 277                 safe => 0, # paranoia
 278                 rebuild => 0,
 279         },
 280         exclude => {
 281                 type => "string",
 282                 default => undef,
 283                 example => '\.wav$',
 284                 description => "regexp of source files to ignore",
 285                 safe => 0, # regexp
 286                 rebuild => 1,
 287         },
 288         banned_users => {
 289                 type => "string",
 290                 default => [],
 291                 description => "users who are banned from the wiki",
 292                 safe => 1,
 293                 rebuild => 0,
 294         },
 295         wiki_file_prune_regexps => {
 296                 type => "internal",
 297                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
 298                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 299                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
 300                         qr/(^|\/)_MTN\//,
 301                         qr/\.dpkg-tmp$/],
 302                 description => "regexps of source files to ignore",
 303                 safe => 0,
 304                 rebuild => 1,
 305         },
 306         wiki_file_regexp => {
 307                 type => "internal",
 308                 default => qr/(^[-[:alnum:]_.:\/+]+$)/,
 309                 description => "regexp of legal source files",
 310                 safe => 0,
 311                 rebuild => 1,
 312         },
 313         web_commit_regexp => {
 314                 type => "internal",
 315                 default => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
 316                 description => "regexp to parse web commits from logs",
 317                 safe => 0,
 318                 rebuild => 0,
 319         },
 320         cgi => {
 321                 type => "internal",
 322                 default => 0,
 323                 description => "run as a cgi",
 324                 safe => 0,
 325                 rebuild => 0,
 326         },
 327         cgi_disable_uploads => {
 328                 type => "internal",
 329                 default => 1,
 330                 description => "whether CGI should accept file uploads",
 331                 safe => 0,
 332                 rebuild => 0,
 333         },
 334         post_commit => {
 335                 type => "internal",
 336                 default => 0,
 337                 description => "run as a post-commit hook",
 338                 safe => 0,
 339                 rebuild => 0,
 340         },
 341         rebuild => {
 342                 type => "internal",
 343                 default => 0,
 344                 description => "running in rebuild mode",
 345                 safe => 0,
 346                 rebuild => 0,
 347         },
 348         refresh => {
 349                 type => "internal",
 350                 default => 0,
 351                 description => "running in refresh mode",
 352                 safe => 0,
 353                 rebuild => 0,
 354         },
 355         getctime => {
 356                 type => "internal",
 357                 default => 0,
 358                 description => "running in getctime mode",
 359                 safe => 0,
 360                 rebuild => 0,
 361         },
 362         w3mmode => {
 363                 type => "internal",
 364                 default => 0,
 365                 description => "running in w3mmode",
 366                 safe => 0,
 367                 rebuild => 0,
 368         },
 369         setup => {
 370                 type => "internal",
 371                 default => undef,
 372                 description => "setup file to read",
 373                 safe => 0,
 374                 rebuild => 0,
 375         },
 376 } #}}}
 377
 378 sub defaultconfig () { #{{{
 379         my %s=getsetup();
 380         my @ret;
 381         foreach my $key (keys %s) {
 382                 push @ret, $key, $s{$key}->{default};
 383         }
 384         use Data::Dumper;
 385         return @ret;
 386 } #}}}
 387
 388 sub checkconfig () { #{{{
 389         # locale stuff; avoid LC_ALL since it overrides everything
 390         if (defined $ENV{LC_ALL}) {
 391                 $ENV{LANG} = $ENV{LC_ALL};
 392                 delete $ENV{LC_ALL};
 393         }
 394         if (defined $config{locale}) {
 395                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 396                         $ENV{LANG}=$config{locale};
 397                         $gettext_obj=undef;
 398                 }
 399         }
 400
 401         if (ref $config{ENV} eq 'HASH') {
 402                 foreach my $val (keys %{$config{ENV}}) {
 403                         $ENV{$val}=$config{ENV}{$val};
 404                 }
 405         }
 406
 407         if ($config{w3mmode}) {
 408                 eval q{use Cwd q{abs_path}};
 409                 error($@) if $@;
 410                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 411                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 412                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 413                         unless $config{cgiurl} =~ m!file:///!;
 414                 $config{url}="file://".$config{destdir};
 415         }
 416
 417         if ($config{cgi} && ! length $config{url}) {
 418                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 419         }
 420
 421         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 422                 unless exists $config{wikistatedir};
 423
 424         if (defined $config{umask}) {
 425                 umask(possibly_foolish_untaint($config{umask}));
 426         }
 427
 428         run_hooks(checkconfig => sub { shift->() });
 429
 430         return 1;
 431 } #}}}
 432
 433 sub listplugins () { #{{{
 434         my %ret;
 435
 436         foreach my $dir (@INC, $config{libdir}) {
 437                 next unless defined $dir && length $dir;
 438                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
 439                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
 440                         $ret{$plugin}=1;
 441                 }
 442         }
 443         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
 444                 next unless defined $dir && length $dir;
 445                 foreach my $file (glob("$dir/plugins/*")) {
 446                         $ret{basename($file)}=1 if -x $file;
 447                 }
 448         }
 449
 450         return keys %ret;
 451 } #}}}
 452
 453 sub loadplugins () { #{{{
 454         if (defined $config{libdir} && length $config{libdir}) {
 455                 unshift @INC, possibly_foolish_untaint($config{libdir});
 456         }
 457
 458         loadplugin($_) foreach @{$config{default_plugins}}, @{$config{add_plugins}};
 459
 460         if ($config{rcs}) {
 461                 if (exists $IkiWiki::hooks{rcs}) {
 462                         error(gettext("cannot use multiple rcs plugins"));
 463                 }
 464                 loadplugin($config{rcs});
 465         }
 466         if (! exists $IkiWiki::hooks{rcs}) {
 467                 loadplugin("norcs");
 468         }
 469
 470         run_hooks(getopt => sub { shift->() });
 471         if (grep /^-/, @ARGV) {
 472                 print STDERR "Unknown option: $_\n"
 473                         foreach grep /^-/, @ARGV;
 474                 usage();
 475         }
 476
 477         return 1;
 478 } #}}}
 479
 480 sub loadplugin ($) { #{{{
 481         my $plugin=shift;
 482
 483         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 484
 485         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 486                          "$installdir/lib/ikiwiki") {
 487                 if (defined $dir && -x "$dir/plugins/$plugin") {
 488                         require IkiWiki::Plugin::external;
 489                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 490                         $loaded_plugins{$plugin}=1;
 491                         return 1;
 492                 }
 493         }
 494
 495         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 496         eval qq{use $mod};
 497         if ($@) {
 498                 error("Failed to load plugin $mod: $@");
 499         }
 500         $loaded_plugins{$plugin}=1;
 501         return 1;
 502 } #}}}
 503
 504 sub error ($;$) { #{{{
 505         my $message=shift;
 506         my $cleaner=shift;
 507         log_message('err' => $message) if $config{syslog};
 508         if (defined $cleaner) {
 509                 $cleaner->();
 510         }
 511         die $message."\n";
 512 } #}}}
 513
 514 sub debug ($) { #{{{
 515         return unless $config{verbose};
 516         return log_message(debug => @_);
 517 } #}}}
 518
 519 my $log_open=0;
 520 sub log_message ($$) { #{{{
 521         my $type=shift;
 522
 523         if ($config{syslog}) {
 524                 require Sys::Syslog;
 525                 if (! $log_open) {
 526                         Sys::Syslog::setlogsock('unix');
 527                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 528                         $log_open=1;
 529                 }
 530                 return eval {
 531                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 532                 };
 533         }
 534         elsif (! $config{cgi}) {
 535                 return print "@_\n";
 536         }
 537         else {
 538                 return print STDERR "@_\n";
 539         }
 540 } #}}}
 541
 542 sub possibly_foolish_untaint ($) { #{{{
 543         my $tainted=shift;
 544         my ($untainted)=$tainted=~/(.*)/s;
 545         return $untainted;
 546 } #}}}
 547
 548 sub basename ($) { #{{{
 549         my $file=shift;
 550
 551         $file=~s!.*/+!!;
 552         return $file;
 553 } #}}}
 554
 555 sub dirname ($) { #{{{
 556         my $file=shift;
 557
 558         $file=~s!/*[^/]+$!!;
 559         return $file;
 560 } #}}}
 561
 562 sub pagetype ($) { #{{{
 563         my $page=shift;
 564
 565         if ($page =~ /\.([^.]+)$/) {
 566                 return $1 if exists $hooks{htmlize}{$1};
 567         }
 568         return;
 569 } #}}}
 570
 571 sub isinternal ($) { #{{{
 572         my $page=shift;
 573         return exists $pagesources{$page} &&
 574                 $pagesources{$page} =~ /\._([^.]+)$/;
 575 } #}}}
 576
 577 sub pagename ($) { #{{{
 578         my $file=shift;
 579
 580         my $type=pagetype($file);
 581         my $page=$file;
 582         $page=~s/\Q.$type\E*$// if defined $type;
 583         return $page;
 584 } #}}}
 585
 586 sub targetpage ($$) { #{{{
 587         my $page=shift;
 588         my $ext=shift;
 589
 590         if (! $config{usedirs} || $page =~ /^index$/ ) {
 591                 return $page.".".$ext;
 592         } else {
 593                 return $page."/index.".$ext;
 594         }
 595 } #}}}
 596
 597 sub htmlpage ($) { #{{{
 598         my $page=shift;
 599
 600         return targetpage($page, $config{htmlext});
 601 } #}}}
 602
 603 sub srcfile_stat { #{{{
 604         my $file=shift;
 605         my $nothrow=shift;
 606
 607         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
 608         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 609                 return "$dir/$file", stat(_) if -e "$dir/$file";
 610         }
 611         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 612         return;
 613 } #}}}
 614
 615 sub srcfile ($;$) { #{{{
 616         return (srcfile_stat(@_))[0];
 617 } #}}}
 618
 619 sub add_underlay ($) { #{{{
 620         my $dir=shift;
 621
 622         if ($dir=~/^\//) {
 623                 unshift @{$config{underlaydirs}}, $dir;
 624         }
 625         else {
 626                 unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
 627         }
 628
 629         return 1;
 630 } #}}}
 631
 632 sub readfile ($;$$) { #{{{
 633         my $file=shift;
 634         my $binary=shift;
 635         my $wantfd=shift;
 636
 637         if (-l $file) {
 638                 error("cannot read a symlink ($file)");
 639         }
 640
 641         local $/=undef;
 642         open (my $in, "<", $file) || error("failed to read $file: $!");
 643         binmode($in) if ($binary);
 644         return \*$in if $wantfd;
 645         my $ret=<$in>;
 646         close $in || error("failed to read $file: $!");
 647         return $ret;
 648 } #}}}
 649
 650 sub prep_writefile ($$) { #{{{
 651         my $file=shift;
 652         my $destdir=shift;
 653
 654         my $test=$file;
 655         while (length $test) {
 656                 if (-l "$destdir/$test") {
 657                         error("cannot write to a symlink ($test)");
 658                 }
 659                 $test=dirname($test);
 660         }
 661
 662         my $dir=dirname("$destdir/$file");
 663         if (! -d $dir) {
 664                 my $d="";
 665                 foreach my $s (split(m!/+!, $dir)) {
 666                         $d.="$s/";
 667                         if (! -d $d) {
 668                                 mkdir($d) || error("failed to create directory $d: $!");
 669                         }
 670                 }
 671         }
 672
 673         return 1;
 674 } #}}}
 675
 676 sub writefile ($$$;$$) { #{{{
 677         my $file=shift; # can include subdirs
 678         my $destdir=shift; # directory to put file in
 679         my $content=shift;
 680         my $binary=shift;
 681         my $writer=shift;
 682
 683         prep_writefile($file, $destdir);
 684
 685         my $newfile="$destdir/$file.ikiwiki-new";
 686         if (-l $newfile) {
 687                 error("cannot write to a symlink ($newfile)");
 688         }
 689
 690         my $cleanup = sub { unlink($newfile) };
 691         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 692         binmode($out) if ($binary);
 693         if ($writer) {
 694                 $writer->(\*$out, $cleanup);
 695         }
 696         else {
 697                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 698         }
 699         close $out || error("failed saving $newfile: $!", $cleanup);
 700         rename($newfile, "$destdir/$file") ||
 701                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 702
 703         return 1;
 704 } #}}}
 705
 706 my %cleared;
 707 sub will_render ($$;$) { #{{{
 708         my $page=shift;
 709         my $dest=shift;
 710         my $clear=shift;
 711
 712         # Important security check.
 713         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 714             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
 715                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 716         }
 717
 718         if (! $clear || $cleared{$page}) {
 719                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 720         }
 721         else {
 722                 foreach my $old (@{$renderedfiles{$page}}) {
 723                         delete $destsources{$old};
 724                 }
 725                 $renderedfiles{$page}=[$dest];
 726                 $cleared{$page}=1;
 727         }
 728         $destsources{$dest}=$page;
 729
 730         return 1;
 731 } #}}}
 732
 733 sub bestlink ($$) { #{{{
 734         my $page=shift;
 735         my $link=shift;
 736
 737         my $cwd=$page;
 738         if ($link=~s/^\/+//) {
 739                 # absolute links
 740                 $cwd="";
 741         }
 742         $link=~s/\/$//;
 743
 744         do {
 745                 my $l=$cwd;
 746                 $l.="/" if length $l;
 747                 $l.=$link;
 748
 749                 if (exists $links{$l}) {
 750                         return $l;
 751                 }
 752                 elsif (exists $pagecase{lc $l}) {
 753                         return $pagecase{lc $l};
 754                 }
 755         } while $cwd=~s!/?[^/]+$!!;
 756
 757         if (length $config{userdir}) {
 758                 my $l = "$config{userdir}/".lc($link);
 759                 if (exists $links{$l}) {
 760                         return $l;
 761                 }
 762                 elsif (exists $pagecase{lc $l}) {
 763                         return $pagecase{lc $l};
 764                 }
 765         }
 766
 767         #print STDERR "warning: page $page, broken link: $link\n";
 768         return "";
 769 } #}}}
 770
 771 sub isinlinableimage ($) { #{{{
 772         my $file=shift;
 773
 774         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 775 } #}}}
 776
 777 sub pagetitle ($;$) { #{{{
 778         my $page=shift;
 779         my $unescaped=shift;
 780
 781         if ($unescaped) {
 782                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 783         }
 784         else {
 785                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 786         }
 787
 788         return $page;
 789 } #}}}
 790
 791 sub titlepage ($) { #{{{
 792         my $title=shift;
 793         $title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 794         return $title;
 795 } #}}}
 796
 797 sub linkpage ($) { #{{{
 798         my $link=shift;
 799         $link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 800         return $link;
 801 } #}}}
 802
 803 sub cgiurl (@) { #{{{
 804         my %params=@_;
 805
 806         return $config{cgiurl}."?".
 807                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 808 } #}}}
 809
 810 sub baseurl (;$) { #{{{
 811         my $page=shift;
 812
 813         return "$config{url}/" if ! defined $page;
 814
 815         $page=htmlpage($page);
 816         $page=~s/[^\/]+$//;
 817         $page=~s/[^\/]+\//..\//g;
 818         return $page;
 819 } #}}}
 820
 821 sub abs2rel ($$) { #{{{
 822         # Work around very innefficient behavior in File::Spec if abs2rel
 823         # is passed two relative paths. It's much faster if paths are
 824         # absolute! (Debian bug #376658; fixed in debian unstable now)
 825         my $path="/".shift;
 826         my $base="/".shift;
 827
 828         require File::Spec;
 829         my $ret=File::Spec->abs2rel($path, $base);
 830         $ret=~s/^// if defined $ret;
 831         return $ret;
 832 } #}}}
 833
 834 sub displaytime ($;$) { #{{{
 835         my $time=shift;
 836         my $format=shift;
 837         if (! defined $format) {
 838                 $format=$config{timeformat};
 839         }
 840
 841         # strftime doesn't know about encodings, so make sure
 842         # its output is properly treated as utf8
 843         return decode_utf8(POSIX::strftime($format, localtime($time)));
 844 } #}}}
 845
 846 sub beautify_urlpath ($) { #{{{
 847         my $url=shift;
 848
 849         if ($config{usedirs}) {
 850                 $url =~ s!/index.$config{htmlext}$!/!;
 851         }
 852
 853         # Ensure url is not an empty link, and
 854         # if it's relative, make that explicit to avoid colon confusion.
 855         if ($url !~ /^\//) {
 856                 $url="./$url";
 857         }
 858
 859         return $url;
 860 } #}}}
 861
 862 sub urlto ($$;$) { #{{{
 863         my $to=shift;
 864         my $from=shift;
 865         my $absolute=shift;
 866
 867         if (! length $to) {
 868                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
 869         }
 870
 871         if (! $destsources{$to}) {
 872                 $to=htmlpage($to);
 873         }
 874
 875         if ($absolute) {
 876                 return $config{url}.beautify_urlpath("/".$to);
 877         }
 878
 879         my $link = abs2rel($to, dirname(htmlpage($from)));
 880
 881         return beautify_urlpath($link);
 882 } #}}}
 883
 884 sub htmllink ($$$;@) { #{{{
 885         my $lpage=shift; # the page doing the linking
 886         my $page=shift; # the page that will contain the link (different for inline)
 887         my $link=shift;
 888         my %opts=@_;
 889
 890         $link=~s/\/$//;
 891
 892         my $bestlink;
 893         if (! $opts{forcesubpage}) {
 894                 $bestlink=bestlink($lpage, $link);
 895         }
 896         else {
 897                 $bestlink="$lpage/".lc($link);
 898         }
 899
 900         my $linktext;
 901         if (defined $opts{linktext}) {
 902                 $linktext=$opts{linktext};
 903         }
 904         else {
 905                 $linktext=pagetitle(basename($link));
 906         }
 907
 908         return "<span class=\"selflink\">$linktext</span>"
 909                 if length $bestlink && $page eq $bestlink &&
 910                    ! defined $opts{anchor};
 911
 912         if (! $destsources{$bestlink}) {
 913                 $bestlink=htmlpage($bestlink);
 914
 915                 if (! $destsources{$bestlink}) {
 916                         return $linktext unless length $config{cgiurl};
 917                         return "<span class=\"createlink\"><a href=\"".
 918                                 cgiurl(
 919                                         do => "create",
 920                                         page => lc($link),
 921                                         from => $lpage
 922                                 ).
 923                                 "\" rel=\"nofollow\">?</a>$linktext</span>"
 924                 }
 925         }
 926
 927         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
 928         $bestlink=beautify_urlpath($bestlink);
 929
 930         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
 931                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
 932         }
 933
 934         if (defined $opts{anchor}) {
 935                 $bestlink.="#".$opts{anchor};
 936         }
 937
 938         my @attrs;
 939         if (defined $opts{rel}) {
 940                 push @attrs, ' rel="'.$opts{rel}.'"';
 941         }
 942         if (defined $opts{class}) {
 943                 push @attrs, ' class="'.$opts{class}.'"';
 944         }
 945
 946         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 947 } #}}}
 948
 949 sub userlink ($) { #{{{
 950         my $user=shift;
 951
 952         my $oiduser=eval { openiduser($user) };
 953         if (defined $oiduser) {
 954                 return "<a href=\"$user\">$oiduser</a>";
 955         }
 956         else {
 957                 eval q{use CGI 'escapeHTML'};
 958                 error($@) if $@;
 959
 960                 return htmllink("", "", escapeHTML(
 961                         length $config{userdir} ? $config{userdir}."/".$user : $user
 962                 ), noimageinline => 1);
 963         }
 964 } #}}}
 965
 966 sub htmlize ($$$$) { #{{{
 967         my $page=shift;
 968         my $destpage=shift;
 969         my $type=shift;
 970         my $content=shift;
 971
 972         my $oneline = $content !~ /\n/;
 973
 974         if (exists $hooks{htmlize}{$type}) {
 975                 $content=$hooks{htmlize}{$type}{call}->(
 976                         page => $page,
 977                         content => $content,
 978                 );
 979         }
 980         else {
 981                 error("htmlization of $type not supported");
 982         }
 983
 984         run_hooks(sanitize => sub {
 985                 $content=shift->(
 986                         page => $page,
 987                         destpage => $destpage,
 988                         content => $content,
 989                 );
 990         });
 991
 992         if ($oneline) {
 993                 # hack to get rid of enclosing junk added by markdown
 994                 # and other htmlizers
 995                 $content=~s/^<p>//i;
 996                 $content=~s/<\/p>$//i;
 997                 chomp $content;
 998         }
 999
1000         return $content;
1001 } #}}}
1002
1003 sub linkify ($$$) { #{{{
1004         my $page=shift;
1005         my $destpage=shift;
1006         my $content=shift;
1007
1008         run_hooks(linkify => sub {
1009                 $content=shift->(
1010                         page => $page,
1011                         destpage => $destpage,
1012                         content => $content,
1013                 );
1014         });
1015
1016         return $content;
1017 } #}}}
1018
1019 our %preprocessing;
1020 our $preprocess_preview=0;
1021 sub preprocess ($$$;$$) { #{{{
1022         my $page=shift; # the page the data comes from
1023         my $destpage=shift; # the page the data will appear in (different for inline)
1024         my $content=shift;
1025         my $scan=shift;
1026         my $preview=shift;
1027
1028         # Using local because it needs to be set within any nested calls
1029         # of this function.
1030         local $preprocess_preview=$preview if defined $preview;
1031
1032         my $handle=sub {
1033                 my $escape=shift;
1034                 my $prefix=shift;
1035                 my $command=shift;
1036                 my $params=shift;
1037                 if (length $escape) {
1038                         return "[[$prefix$command $params]]";
1039                 }
1040                 elsif (exists $hooks{preprocess}{$command}) {
1041                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1042                         # Note: preserve order of params, some plugins may
1043                         # consider it significant.
1044                         my @params;
1045                         while ($params =~ m{
1046                                 (?:([-\w]+)=)?          # 1: named parameter key?
1047                                 (?:
1048                                         """(.*?)"""     # 2: triple-quoted value
1049                                 |
1050                                         "([^"]+)"       # 3: single-quoted value
1051                                 |
1052                                         (\S+)           # 4: unquoted value
1053                                 )
1054                                 (?:\s+|$)               # delimiter to next param
1055                         }sgx) {
1056                                 my $key=$1;
1057                                 my $val;
1058                                 if (defined $2) {
1059                                         $val=$2;
1060                                         $val=~s/\r\n/\n/mg;
1061                                         $val=~s/^\n+//g;
1062                                         $val=~s/\n+$//g;
1063                                 }
1064                                 elsif (defined $3) {
1065                                         $val=$3;
1066                                 }
1067                                 elsif (defined $4) {
1068                                         $val=$4;
1069                                 }
1070
1071                                 if (defined $key) {
1072                                         push @params, $key, $val;
1073                                 }
1074                                 else {
1075                                         push @params, $val, '';
1076                                 }
1077                         }
1078                         if ($preprocessing{$page}++ > 3) {
1079                                 # Avoid loops of preprocessed pages preprocessing
1080                                 # other pages that preprocess them, etc.
1081                                 return "[[!$command <span class=\"error\">".
1082                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1083                                                 $page, $preprocessing{$page}).
1084                                         "</span>]]";
1085                         }
1086                         my $ret;
1087                         if (! $scan) {
1088                                 $ret=eval {
1089                                         $hooks{preprocess}{$command}{call}->(
1090                                                 @params,
1091                                                 page => $page,
1092                                                 destpage => $destpage,
1093                                                 preview => $preprocess_preview,
1094                                         );
1095                                 };
1096                                 if ($@) {
1097                                         chomp $@;
1098                                         $ret="[[!$command <span class=\"error\">".
1099                                                 gettext("Error").": $@"."</span>]]";
1100                                 }
1101                         }
1102                         else {
1103                                 # use void context during scan pass
1104                                 eval {
1105                                         $hooks{preprocess}{$command}{call}->(
1106                                                 @params,
1107                                                 page => $page,
1108                                                 destpage => $destpage,
1109                                                 preview => $preprocess_preview,
1110                                         );
1111                                 };
1112                                 $ret="";
1113                         }
1114                         $preprocessing{$page}--;
1115                         return $ret;
1116                 }
1117                 else {
1118                         return "[[$prefix$command $params]]";
1119                 }
1120         };
1121
1122         my $regex;
1123         if ($config{prefix_directives}) {
1124                 $regex = qr{
1125                         (\\?)           # 1: escape?
1126                         \[\[(!)         # directive open; 2: prefix
1127                         ([-\w]+)        # 3: command
1128                         (               # 4: the parameters..
1129                                 \s+     # Must have space if parameters present
1130                                 (?:
1131                                         (?:[-\w]+=)?            # named parameter key?
1132                                         (?:
1133                                                 """.*?"""       # triple-quoted value
1134                                                 |
1135                                                 "[^"]+"         # single-quoted value
1136                                                 |
1137                                                 [^\s\]]+        # unquoted value
1138                                         )
1139                                         \s*                     # whitespace or end
1140                                                                 # of directive
1141                                 )
1142                         *)?             # 0 or more parameters
1143                         \]\]            # directive closed
1144                 }sx;
1145         }
1146         else {
1147                 $regex = qr{
1148                         (\\?)           # 1: escape?
1149                         \[\[(!?)        # directive open; 2: optional prefix
1150                         ([-\w]+)        # 3: command
1151                         \s+
1152                         (               # 4: the parameters..
1153                                 (?:
1154                                         (?:[-\w]+=)?            # named parameter key?
1155                                         (?:
1156                                                 """.*?"""       # triple-quoted value
1157                                                 |
1158                                                 "[^"]+"         # single-quoted value
1159                                                 |
1160                                                 [^\s\]]+        # unquoted value
1161                                         )
1162                                         \s*                     # whitespace or end
1163                                                                 # of directive
1164                                 )
1165                         *)              # 0 or more parameters
1166                         \]\]            # directive closed
1167                 }sx;
1168         }
1169
1170         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1171         return $content;
1172 } #}}}
1173
1174 sub filter ($$$) { #{{{
1175         my $page=shift;
1176         my $destpage=shift;
1177         my $content=shift;
1178
1179         run_hooks(filter => sub {
1180                 $content=shift->(page => $page, destpage => $destpage,
1181                         content => $content);
1182         });
1183
1184         return $content;
1185 } #}}}
1186
1187 sub indexlink () { #{{{
1188         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1189 } #}}}
1190
1191 my $wikilock;
1192
1193 sub lockwiki (;$) { #{{{
1194         my $wait=@_ ? shift : 1;
1195         # Take an exclusive lock on the wiki to prevent multiple concurrent
1196         # run issues. The lock will be dropped on program exit.
1197         if (! -d $config{wikistatedir}) {
1198                 mkdir($config{wikistatedir});
1199         }
1200         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1201                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1202         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
1203                 if ($wait) {
1204                         debug("wiki seems to be locked, waiting for lock");
1205                         my $wait=600; # arbitrary, but don't hang forever to
1206                                       # prevent process pileup
1207                         for (1..$wait) {
1208                                 return if flock($wikilock, 2 | 4);
1209                                 sleep 1;
1210                         }
1211                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
1212                 }
1213                 else {
1214                         return 0;
1215                 }
1216         }
1217         return 1;
1218 } #}}}
1219
1220 sub unlockwiki () { #{{{
1221         return close($wikilock) if $wikilock;
1222         return;
1223 } #}}}
1224
1225 my $commitlock;
1226
1227 sub commit_hook_enabled () { #{{{
1228         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1229                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1230         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1231                 close($commitlock) || error("failed closing commitlock: $!");
1232                 return 0;
1233         }
1234         close($commitlock) || error("failed closing commitlock: $!");
1235         return 1;
1236 } #}}}
1237
1238 sub disable_commit_hook () { #{{{
1239         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1240                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1241         if (! flock($commitlock, 2)) { # LOCK_EX
1242                 error("failed to get commit lock");
1243         }
1244         return 1;
1245 } #}}}
1246
1247 sub enable_commit_hook () { #{{{
1248         return close($commitlock) if $commitlock;
1249         return;
1250 } #}}}
1251
1252 sub loadindex () { #{{{
1253         %oldrenderedfiles=%pagectime=();
1254         if (! $config{rebuild}) {
1255                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1256                 %destsources=%renderedfiles=%pagecase=%pagestate=();
1257         }
1258         my $in;
1259         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1260                 if (-e "$config{wikistatedir}/index") {
1261                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1262                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1263                 }
1264                 else {
1265                         return;
1266                 }
1267         }
1268         my $ret=Storable::fd_retrieve($in);
1269         if (! defined $ret) {
1270                 return 0;
1271         }
1272         my %index=%$ret;
1273         foreach my $src (keys %index) {
1274                 my %d=%{$index{$src}};
1275                 my $page=pagename($src);
1276                 $pagectime{$page}=$d{ctime};
1277                 if (! $config{rebuild}) {
1278                         $pagesources{$page}=$src;
1279                         $pagemtime{$page}=$d{mtime};
1280                         $renderedfiles{$page}=$d{dest};
1281                         if (exists $d{links} && ref $d{links}) {
1282                                 $links{$page}=$d{links};
1283                                 $oldlinks{$page}=[@{$d{links}}];
1284                         }
1285                         if (exists $d{depends}) {
1286                                 $depends{$page}=$d{depends};
1287                         }
1288                         if (exists $d{state}) {
1289                                 $pagestate{$page}=$d{state};
1290                         }
1291                 }
1292                 $oldrenderedfiles{$page}=[@{$d{dest}}];
1293         }
1294         foreach my $page (keys %pagesources) {
1295                 $pagecase{lc $page}=$page;
1296         }
1297         foreach my $page (keys %renderedfiles) {
1298                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1299         }
1300         return close($in);
1301 } #}}}
1302
1303 sub saveindex () { #{{{
1304         run_hooks(savestate => sub { shift->() });
1305
1306         my %hookids;
1307         foreach my $type (keys %hooks) {
1308                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1309         }
1310         my @hookids=keys %hookids;
1311
1312         if (! -d $config{wikistatedir}) {
1313                 mkdir($config{wikistatedir});
1314         }
1315         my $newfile="$config{wikistatedir}/indexdb.new";
1316         my $cleanup = sub { unlink($newfile) };
1317         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1318         my %index;
1319         foreach my $page (keys %pagemtime) {
1320                 next unless $pagemtime{$page};
1321                 my $src=$pagesources{$page};
1322
1323                 $index{$src}={
1324                         ctime => $pagectime{$page},
1325                         mtime => $pagemtime{$page},
1326                         dest => $renderedfiles{$page},
1327                         links => $links{$page},
1328                 };
1329
1330                 if (exists $depends{$page}) {
1331                         $index{$src}{depends} = $depends{$page};
1332                 }
1333
1334                 if (exists $pagestate{$page}) {
1335                         foreach my $id (@hookids) {
1336                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1337                                         $index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1338                                 }
1339                         }
1340                 }
1341         }
1342         my $ret=Storable::nstore_fd(\%index, $out);
1343         return if ! defined $ret || ! $ret;
1344         close $out || error("failed saving to $newfile: $!", $cleanup);
1345         rename($newfile, "$config{wikistatedir}/indexdb") ||
1346                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1347
1348         return 1;
1349 } #}}}
1350
1351 sub template_file ($) { #{{{
1352         my $template=shift;
1353
1354         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1355                 return "$dir/$template" if -e "$dir/$template";
1356         }
1357         return;
1358 } #}}}
1359
1360 sub template_params (@) { #{{{
1361         my $filename=template_file(shift);
1362
1363         if (! defined $filename) {
1364                 return if wantarray;
1365                 return "";
1366         }
1367
1368         my @ret=(
1369                 filter => sub {
1370                         my $text_ref = shift;
1371                         ${$text_ref} = decode_utf8(${$text_ref});
1372                 },
1373                 filename => $filename,
1374                 loop_context_vars => 1,
1375                 die_on_bad_params => 0,
1376                 @_
1377         );
1378         return wantarray ? @ret : {@ret};
1379 } #}}}
1380
1381 sub template ($;@) { #{{{
1382         require HTML::Template;
1383         return HTML::Template->new(template_params(@_));
1384 } #}}}
1385
1386 sub misctemplate ($$;@) { #{{{
1387         my $title=shift;
1388         my $pagebody=shift;
1389
1390         my $template=template("misc.tmpl");
1391         $template->param(
1392                 title => $title,
1393                 indexlink => indexlink(),
1394                 wikiname => $config{wikiname},
1395                 pagebody => $pagebody,
1396                 baseurl => baseurl(),
1397                 @_,
1398         );
1399         run_hooks(pagetemplate => sub {
1400                 shift->(page => "", destpage => "", template => $template);
1401         });
1402         return $template->output;
1403 }#}}}
1404
1405 sub hook (@) { # {{{
1406         my %param=@_;
1407
1408         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1409                 error 'hook requires type, call, and id parameters';
1410         }
1411
1412         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1413
1414         $hooks{$param{type}}{$param{id}}=\%param;
1415         return 1;
1416 } # }}}
1417
1418 sub run_hooks ($$) { # {{{
1419         # Calls the given sub for each hook of the given type,
1420         # passing it the hook function to call.
1421         my $type=shift;
1422         my $sub=shift;
1423
1424         if (exists $hooks{$type}) {
1425                 my @deferred;
1426                 foreach my $id (keys %{$hooks{$type}}) {
1427                         if ($hooks{$type}{$id}{last}) {
1428                                 push @deferred, $id;
1429                                 next;
1430                         }
1431                         $sub->($hooks{$type}{$id}{call});
1432                 }
1433                 foreach my $id (@deferred) {
1434                         $sub->($hooks{$type}{$id}{call});
1435                 }
1436         }
1437
1438         return 1;
1439 } #}}}
1440
1441 sub rcs_update () { #{{{
1442         $hooks{rcs}{rcs_update}{call}->(@_);
1443 } #}}}
1444
1445 sub rcs_prepedit ($) { #{{{
1446         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1447 } #}}}
1448
1449 sub rcs_commit ($$$;$$) { #{{{
1450         $hooks{rcs}{rcs_commit}{call}->(@_);
1451 } #}}}
1452
1453 sub rcs_commit_staged ($$$) { #{{{
1454         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1455 } #}}}
1456
1457 sub rcs_add ($) { #{{{
1458         $hooks{rcs}{rcs_add}{call}->(@_);
1459 } #}}}
1460
1461 sub rcs_remove ($) { #{{{
1462         $hooks{rcs}{rcs_remove}{call}->(@_);
1463 } #}}}
1464
1465 sub rcs_rename ($$) { #{{{
1466         $hooks{rcs}{rcs_rename}{call}->(@_);
1467 } #}}}
1468
1469 sub rcs_recentchanges ($) { #{{{
1470         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1471 } #}}}
1472
1473 sub rcs_diff ($) { #{{{
1474         $hooks{rcs}{rcs_diff}{call}->(@_);
1475 } #}}}
1476
1477 sub rcs_getctime ($) { #{{{
1478         $hooks{rcs}{rcs_getctime}{call}->(@_);
1479 } #}}}
1480
1481 sub globlist_to_pagespec ($) { #{{{
1482         my @globlist=split(' ', shift);
1483
1484         my (@spec, @skip);
1485         foreach my $glob (@globlist) {
1486                 if ($glob=~/^!(.*)/) {
1487                         push @skip, $glob;
1488                 }
1489                 else {
1490                         push @spec, $glob;
1491                 }
1492         }
1493
1494         my $spec=join(' or ', @spec);
1495         if (@skip) {
1496                 my $skip=join(' and ', @skip);
1497                 if (length $spec) {
1498                         $spec="$skip and ($spec)";
1499                 }
1500                 else {
1501                         $spec=$skip;
1502                 }
1503         }
1504         return $spec;
1505 } #}}}
1506
1507 sub is_globlist ($) { #{{{
1508         my $s=shift;
1509         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1510 } #}}}
1511
1512 sub safequote ($) { #{{{
1513         my $s=shift;
1514         $s=~s/[{}]//g;
1515         return "q{$s}";
1516 } #}}}
1517
1518 sub add_depends ($$) { #{{{
1519         my $page=shift;
1520         my $pagespec=shift;
1521
1522         return unless pagespec_valid($pagespec);
1523
1524         if (! exists $depends{$page}) {
1525                 $depends{$page}=$pagespec;
1526         }
1527         else {
1528                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1529         }
1530
1531         return 1;
1532 } # }}}
1533
1534 sub file_pruned ($$) { #{{{
1535         require File::Spec;
1536         my $file=File::Spec->canonpath(shift);
1537         my $base=File::Spec->canonpath(shift);
1538         $file =~ s#^\Q$base\E/+##;
1539
1540         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1541         return $file =~ m/$regexp/ && $file ne $base;
1542 } #}}}
1543
1544 sub gettext { #{{{
1545         # Only use gettext in the rare cases it's needed.
1546         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1547             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1548             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1549                 if (! $gettext_obj) {
1550                         $gettext_obj=eval q{
1551                                 use Locale::gettext q{textdomain};
1552                                 Locale::gettext->domain('ikiwiki')
1553                         };
1554                         if ($@) {
1555                                 print STDERR "$@";
1556                                 $gettext_obj=undef;
1557                                 return shift;
1558                         }
1559                 }
1560                 return $gettext_obj->get(shift);
1561         }
1562         else {
1563                 return shift;
1564         }
1565 } #}}}
1566
1567 sub yesno ($) { #{{{
1568         my $val=shift;
1569
1570         return (defined $val && lc($val) eq gettext("yes"));
1571 } #}}}
1572
1573 sub pagespec_merge ($$) { #{{{
1574         my $a=shift;
1575         my $b=shift;
1576
1577         return $a if $a eq $b;
1578
1579         # Support for old-style GlobLists.
1580         if (is_globlist($a)) {
1581                 $a=globlist_to_pagespec($a);
1582         }
1583         if (is_globlist($b)) {
1584                 $b=globlist_to_pagespec($b);
1585         }
1586
1587         return "($a) or ($b)";
1588 } #}}}
1589
1590 sub pagespec_translate ($) { #{{{
1591         my $spec=shift;
1592
1593         # Support for old-style GlobLists.
1594         if (is_globlist($spec)) {
1595                 $spec=globlist_to_pagespec($spec);
1596         }
1597
1598         # Convert spec to perl code.
1599         my $code="";
1600         while ($spec=~m{
1601                 \s*             # ignore whitespace
1602                 (               # 1: match a single word
1603                         \!              # !
1604                 |
1605                         \(              # (
1606                 |
1607                         \)              # )
1608                 |
1609                         \w+\([^\)]*\)   # command(params)
1610                 |
1611                         [^\s()]+        # any other text
1612                 )
1613                 \s*             # ignore whitespace
1614         }igx) {
1615                 my $word=$1;
1616                 if (lc $word eq 'and') {
1617                         $code.=' &&';
1618                 }
1619                 elsif (lc $word eq 'or') {
1620                         $code.=' ||';
1621                 }
1622                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1623                         $code.=' '.$word;
1624                 }
1625                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1626                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1627                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
1628                         }
1629                         else {
1630                                 $code.=' 0';
1631                         }
1632                 }
1633                 else {
1634                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
1635                 }
1636         }
1637
1638         if (! length $code) {
1639                 $code=0;
1640         }
1641
1642         no warnings;
1643         return eval 'sub { my $page=shift; '.$code.' }';
1644 } #}}}
1645
1646 sub pagespec_match ($$;@) { #{{{
1647         my $page=shift;
1648         my $spec=shift;
1649         my @params=@_;
1650
1651         # Backwards compatability with old calling convention.
1652         if (@params == 1) {
1653                 unshift @params, 'location';
1654         }
1655
1656         my $sub=pagespec_translate($spec);
1657         return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
1658         return $sub->($page, @params);
1659 } #}}}
1660
1661 sub pagespec_valid ($) { #{{{
1662         my $spec=shift;
1663
1664         my $sub=pagespec_translate($spec);
1665         return ! $@;
1666 } #}}}
1667
1668 sub glob2re ($) { #{{{
1669         my $re=quotemeta(shift);
1670         $re=~s/\\\*/.*/g;
1671         $re=~s/\\\?/./g;
1672         return $re;
1673 } #}}}
1674
1675 package IkiWiki::FailReason;
1676
1677 use overload ( #{{{
1678         '""'    => sub { ${$_[0]} },
1679         '0+'    => sub { 0 },
1680         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1681         fallback => 1,
1682 ); #}}}
1683
1684 sub new { #{{{
1685         my $class = shift;
1686         my $value = shift;
1687         return bless \$value, $class;
1688 } #}}}
1689
1690 package IkiWiki::SuccessReason;
1691
1692 use overload ( #{{{
1693         '""'    => sub { ${$_[0]} },
1694         '0+'    => sub { 1 },
1695         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1696         fallback => 1,
1697 ); #}}}
1698
1699 sub new { #{{{
1700         my $class = shift;
1701         my $value = shift;
1702         return bless \$value, $class;
1703 }; #}}}
1704
1705 package IkiWiki::PageSpec;
1706
1707 sub match_glob ($$;@) { #{{{
1708         my $page=shift;
1709         my $glob=shift;
1710         my %params=@_;
1711
1712         my $from=exists $params{location} ? $params{location} : '';
1713
1714         # relative matching
1715         if ($glob =~ m!^\./!) {
1716                 $from=~s#/?[^/]+$##;
1717                 $glob=~s#^\./##;
1718                 $glob="$from/$glob" if length $from;
1719         }
1720
1721         my $regexp=IkiWiki::glob2re($glob);
1722         if ($page=~/^$regexp$/i) {
1723                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1724                         return IkiWiki::SuccessReason->new("$glob matches $page");
1725                 }
1726                 else {
1727                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1728                 }
1729         }
1730         else {
1731                 return IkiWiki::FailReason->new("$glob does not match $page");
1732         }
1733 } #}}}
1734
1735 sub match_internal ($$;@) { #{{{
1736         return match_glob($_[0], $_[1], @_, internal => 1)
1737 } #}}}
1738
1739 sub match_link ($$;@) { #{{{
1740         my $page=shift;
1741         my $link=lc(shift);
1742         my %params=@_;
1743
1744         my $from=exists $params{location} ? $params{location} : '';
1745
1746         # relative matching
1747         if ($link =~ m!^\.! && defined $from) {
1748                 $from=~s#/?[^/]+$##;
1749                 $link=~s#^\./##;
1750                 $link="$from/$link" if length $from;
1751         }
1752
1753         my $links = $IkiWiki::links{$page};
1754         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1755         my $bestlink = IkiWiki::bestlink($from, $link);
1756         foreach my $p (@{$links}) {
1757                 if (length $bestlink) {
1758                         return IkiWiki::SuccessReason->new("$page links to $link")
1759                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1760                 }
1761                 else {
1762                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1763                                 if match_glob($p, $link, %params);
1764                 }
1765         }
1766         return IkiWiki::FailReason->new("$page does not link to $link");
1767 } #}}}
1768
1769 sub match_backlink ($$;@) { #{{{
1770         return match_link($_[1], $_[0], @_);
1771 } #}}}
1772
1773 sub match_created_before ($$;@) { #{{{
1774         my $page=shift;
1775         my $testpage=shift;
1776
1777         if (exists $IkiWiki::pagectime{$testpage}) {
1778                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1779                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1780                 }
1781                 else {
1782                         return IkiWiki::FailReason->new("$page not created before $testpage");
1783                 }
1784         }
1785         else {
1786                 return IkiWiki::FailReason->new("$testpage has no ctime");
1787         }
1788 } #}}}
1789
1790 sub match_created_after ($$;@) { #{{{
1791         my $page=shift;
1792         my $testpage=shift;
1793
1794         if (exists $IkiWiki::pagectime{$testpage}) {
1795                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1796                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1797                 }
1798                 else {
1799                         return IkiWiki::FailReason->new("$page not created after $testpage");
1800                 }
1801         }
1802         else {
1803                 return IkiWiki::FailReason->new("$testpage has no ctime");
1804         }
1805 } #}}}
1806
1807 sub match_creation_day ($$;@) { #{{{
1808         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1809                 return IkiWiki::SuccessReason->new('creation_day matched');
1810         }
1811         else {
1812                 return IkiWiki::FailReason->new('creation_day did not match');
1813         }
1814 } #}}}
1815
1816 sub match_creation_month ($$;@) { #{{{
1817         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1818                 return IkiWiki::SuccessReason->new('creation_month matched');
1819         }
1820         else {
1821                 return IkiWiki::FailReason->new('creation_month did not match');
1822         }
1823 } #}}}
1824
1825 sub match_creation_year ($$;@) { #{{{
1826         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1827                 return IkiWiki::SuccessReason->new('creation_year matched');
1828         }
1829         else {
1830                 return IkiWiki::FailReason->new('creation_year did not match');
1831         }
1832 } #}}}
1833
1834 1