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 $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  29
  30 # Optimisation.
  31 use Memoize;
  32 memoize("abs2rel");
  33 memoize("pagespec_translate");
  34 memoize("file_pruned");
  35
  36 sub getsetup () { #{{{
  37         wikiname => {
  38                 type => "string",
  39                 default => "wiki",
  40                 description => "name of the wiki",
  41                 safe => 1,
  42                 rebuild => 1,
  43         },
  44         adminemail => {
  45                 type => "string",
  46                 default => undef,
  47                 example => 'me@example.com',
  48                 description => "contact email for wiki",
  49                 safe => 1,
  50                 rebuild => 0,
  51         },
  52         adminuser => {
  53                 type => "string",
  54                 default => [],
  55                 description => "users who are wiki admins",
  56                 safe => 1,
  57                 rebuild => 0,
  58         },
  59         banned_users => {
  60                 type => "string",
  61                 default => [],
  62                 description => "users who are banned from the wiki",
  63                 safe => 1,
  64                 rebuild => 0,
  65         },
  66         srcdir => {
  67                 type => "string",
  68                 default => undef,
  69                 example => "$ENV{HOME}/wiki",
  70                 description => "where the source of the wiki is located",
  71                 safe => 0, # path
  72                 rebuild => 1,
  73         },
  74         destdir => {
  75                 type => "string",
  76                 default => undef,
  77                 example => "/var/www/wiki",
  78                 description => "where to build the wiki",
  79                 safe => 0, # path
  80                 rebuild => 1,
  81         },
  82         url => {
  83                 type => "string",
  84                 default => '',
  85                 example => "http://example.com/wiki",
  86                 description => "base url to the wiki",
  87                 safe => 1,
  88                 rebuild => 1,
  89         },
  90         cgiurl => {
  91                 type => "string",
  92                 default => '',
  93                 example => "http://example.com/wiki/ikiwiki.cgi",
  94                 description => "url to the ikiwiki.cgi",
  95                 safe => 1,
  96                 rebuild => 1,
  97         },
  98         cgi_wrapper => {
  99                 type => "string",
 100                 default => '',
 101                 example => "/var/www/wiki/ikiwiki.cgi",
 102                 description => "cgi wrapper to generate",
 103                 safe => 0, # file
 104                 rebuild => 0,
 105         },
 106         cgi_wrappermode => {
 107                 type => "string",
 108                 default => '06755',
 109                 description => "mode for cgi_wrapper (can safely be made suid)",
 110                 safe => 0,
 111                 rebuild => 0,
 112         },
 113         rcs => {
 114                 type => "string",
 115                 default => '',
 116                 description => "rcs backend to use",
 117                 safe => 0, # don't allow overriding
 118                 rebuild => 0,
 119         },
 120         default_plugins => {
 121                 type => "internal",
 122                 default => [qw{mdwn link inline htmlscrubber passwordauth
 123                                 openid signinedit lockedit conditional
 124                                 recentchanges parentlinks editpage}],
 125                 description => "plugins to enable by default",
 126                 safe => 0,
 127                 rebuild => 1,
 128         },
 129         add_plugins => {
 130                 type => "string",
 131                 default => [],
 132                 description => "plugins to add to the default configuration",
 133                 safe => 1,
 134                 rebuild => 1,
 135         },
 136         disable_plugins => {
 137                 type => "string",
 138                 default => [],
 139                 description => "plugins to disable",
 140                 safe => 1,
 141                 rebuild => 1,
 142         },
 143         templatedir => {
 144                 type => "string",
 145                 default => "$installdir/share/ikiwiki/templates",
 146                 description => "location of template files",
 147                 advanced => 1,
 148                 safe => 0, # path
 149                 rebuild => 1,
 150         },
 151         underlaydir => {
 152                 type => "string",
 153                 default => "$installdir/share/ikiwiki/basewiki",
 154                 description => "base wiki source location",
 155                 advanced => 1,
 156                 safe => 0, # path
 157                 rebuild => 0,
 158         },
 159         wrappers => {
 160                 type => "internal",
 161                 default => [],
 162                 description => "wrappers to generate",
 163                 safe => 0,
 164                 rebuild => 0,
 165         },
 166         underlaydirs => {
 167                 type => "internal",
 168                 default => [],
 169                 description => "additional underlays to use",
 170                 safe => 0,
 171                 rebuild => 0,
 172         },
 173         verbose => {
 174                 type => "boolean",
 175                 example => 1,
 176                 description => "display verbose messages when building?",
 177                 safe => 1,
 178                 rebuild => 0,
 179         },
 180         syslog => {
 181                 type => "boolean",
 182                 example => 1,
 183                 description => "log to syslog?",
 184                 safe => 1,
 185                 rebuild => 0,
 186         },
 187         usedirs => {
 188                 type => "boolean",
 189                 default => 1,
 190                 description => "create output files named page/index.html?",
 191                 safe => 0, # changing requires manual transition
 192                 rebuild => 1,
 193         },
 194         prefix_directives => {
 195                 type => "boolean",
 196                 default => 0,
 197                 description => "use '!'-prefixed preprocessor directives?",
 198                 safe => 0, # changing requires manual transition
 199                 rebuild => 1,
 200         },
 201         discussion => {
 202                 type => "boolean",
 203                 default => 1,
 204                 description => "enable Discussion pages?",
 205                 safe => 1,
 206                 rebuild => 1,
 207         },
 208         sslcookie => {
 209                 type => "boolean",
 210                 default => 0,
 211                 description => "only send cookies over SSL connections?",
 212                 advanced => 1,
 213                 safe => 1,
 214                 rebuild => 0,
 215         },
 216         default_pageext => {
 217                 type => "string",
 218                 default => "mdwn",
 219                 description => "extension to use for new pages",
 220                 safe => 0, # not sanitized
 221                 rebuild => 0,
 222         },
 223         htmlext => {
 224                 type => "string",
 225                 default => "html",
 226                 description => "extension to use for html files",
 227                 safe => 0, # not sanitized
 228                 rebuild => 1,
 229         },
 230         timeformat => {
 231                 type => "string",
 232                 default => '%c',
 233                 description => "strftime format string to display date",
 234                 advanced => 1,
 235                 safe => 1,
 236                 rebuild => 1,
 237         },
 238         locale => {
 239                 type => "string",
 240                 default => undef,
 241                 example => "en_US.UTF-8",
 242                 description => "UTF-8 locale to use",
 243                 advanced => 1,
 244                 safe => 0,
 245                 rebuild => 1,
 246         },
 247         userdir => {
 248                 type => "string",
 249                 default => "",
 250                 example => "users",
 251                 description => "put user pages below specified page",
 252                 safe => 1,
 253                 rebuild => 1,
 254         },
 255         numbacklinks => {
 256                 type => "integer",
 257                 default => 10,
 258                 description => "how many backlinks to show before hiding excess (0 to show all)",
 259                 safe => 1,
 260                 rebuild => 1,
 261         },
 262         hardlink => {
 263                 type => "boolean",
 264                 default => 0,
 265                 description => "attempt to hardlink source files? (optimisation for large files)",
 266                 advanced => 1,
 267                 safe => 0, # paranoia
 268                 rebuild => 0,
 269         },
 270         umask => {
 271                 type => "integer",
 272                 description => "",
 273                 example => "022",
 274                 description => "force ikiwiki to use a particular umask",
 275                 advanced => 1,
 276                 safe => 0, # paranoia
 277                 rebuild => 0,
 278         },
 279         libdir => {
 280                 type => "string",
 281                 default => "",
 282                 example => "$ENV{HOME}/.ikiwiki/",
 283                 description => "extra library and plugin directory",
 284                 advanced => 1,
 285                 safe => 0, # directory
 286                 rebuild => 0,
 287         },
 288         ENV => {
 289                 type => "string",
 290                 default => {},
 291                 description => "environment variables",
 292                 safe => 0, # paranoia
 293                 rebuild => 0,
 294         },
 295         exclude => {
 296                 type => "string",
 297                 default => undef,
 298                 example => '\.wav$',
 299                 description => "regexp of source files to ignore",
 300                 advanced => 1,
 301                 safe => 0, # regexp
 302                 rebuild => 1,
 303         },
 304         wiki_file_prune_regexps => {
 305                 type => "internal",
 306                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
 307                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 308                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
 309                         qr/(^|\/)_MTN\//,
 310                         qr/\.dpkg-tmp$/],
 311                 description => "regexps of source files to ignore",
 312                 safe => 0,
 313                 rebuild => 1,
 314         },
 315         wiki_file_chars => {
 316                 type => "string",
 317                 description => "specifies the characters that are allowed in source filenames",
 318                 default => "-[:alnum:]+/.:_",
 319                 safe => 0,
 320                 rebuild => 1,
 321         },
 322         wiki_file_regexp => {
 323                 type => "internal",
 324                 description => "regexp of legal source files",
 325                 safe => 0,
 326                 rebuild => 1,
 327         },
 328         web_commit_regexp => {
 329                 type => "internal",
 330                 default => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
 331                 description => "regexp to parse web commits from logs",
 332                 safe => 0,
 333                 rebuild => 0,
 334         },
 335         cgi => {
 336                 type => "internal",
 337                 default => 0,
 338                 description => "run as a cgi",
 339                 safe => 0,
 340                 rebuild => 0,
 341         },
 342         cgi_disable_uploads => {
 343                 type => "internal",
 344                 default => 1,
 345                 description => "whether CGI should accept file uploads",
 346                 safe => 0,
 347                 rebuild => 0,
 348         },
 349         post_commit => {
 350                 type => "internal",
 351                 default => 0,
 352                 description => "run as a post-commit hook",
 353                 safe => 0,
 354                 rebuild => 0,
 355         },
 356         rebuild => {
 357                 type => "internal",
 358                 default => 0,
 359                 description => "running in rebuild mode",
 360                 safe => 0,
 361                 rebuild => 0,
 362         },
 363         setup => {
 364                 type => "internal",
 365                 default => undef,
 366                 description => "running in setup mode",
 367                 safe => 0,
 368                 rebuild => 0,
 369         },
 370         refresh => {
 371                 type => "internal",
 372                 default => 0,
 373                 description => "running in refresh mode",
 374                 safe => 0,
 375                 rebuild => 0,
 376         },
 377         getctime => {
 378                 type => "internal",
 379                 default => 0,
 380                 description => "running in getctime mode",
 381                 safe => 0,
 382                 rebuild => 0,
 383         },
 384         w3mmode => {
 385                 type => "internal",
 386                 default => 0,
 387                 description => "running in w3mmode",
 388                 safe => 0,
 389                 rebuild => 0,
 390         },
 391         setupfile => {
 392                 type => "internal",
 393                 default => undef,
 394                 description => "path to setup file",
 395                 safe => 0,
 396                 rebuild => 0,
 397         },
 398         allow_symlinks_before_srcdir => {
 399                 type => "string",
 400                 default => 0,
 401                 description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
 402                 safe => 0,
 403                 rebuild => 0,
 404         },
 405 } #}}}
 406
 407 sub defaultconfig () { #{{{
 408         my %s=getsetup();
 409         my @ret;
 410         foreach my $key (keys %s) {
 411                 push @ret, $key, $s{$key}->{default};
 412         }
 413         use Data::Dumper;
 414         return @ret;
 415 } #}}}
 416
 417 sub checkconfig () { #{{{
 418         # locale stuff; avoid LC_ALL since it overrides everything
 419         if (defined $ENV{LC_ALL}) {
 420                 $ENV{LANG} = $ENV{LC_ALL};
 421                 delete $ENV{LC_ALL};
 422         }
 423         if (defined $config{locale}) {
 424                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 425                         $ENV{LANG}=$config{locale};
 426                         $gettext_obj=undef;
 427                 }
 428         }
 429
 430         if (! defined $config{wiki_file_regexp}) {
 431                 $config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
 432         }
 433
 434         if (ref $config{ENV} eq 'HASH') {
 435                 foreach my $val (keys %{$config{ENV}}) {
 436                         $ENV{$val}=$config{ENV}{$val};
 437                 }
 438         }
 439
 440         if ($config{w3mmode}) {
 441                 eval q{use Cwd q{abs_path}};
 442                 error($@) if $@;
 443                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 444                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 445                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 446                         unless $config{cgiurl} =~ m!file:///!;
 447                 $config{url}="file://".$config{destdir};
 448         }
 449
 450         if ($config{cgi} && ! length $config{url}) {
 451                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 452         }
 453
 454         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 455                 unless exists $config{wikistatedir};
 456
 457         if (defined $config{umask}) {
 458                 umask(possibly_foolish_untaint($config{umask}));
 459         }
 460
 461         run_hooks(checkconfig => sub { shift->() });
 462
 463         return 1;
 464 } #}}}
 465
 466 sub listplugins () { #{{{
 467         my %ret;
 468
 469         foreach my $dir (@INC, $config{libdir}) {
 470                 next unless defined $dir && length $dir;
 471                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
 472                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
 473                         $ret{$plugin}=1;
 474                 }
 475         }
 476         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
 477                 next unless defined $dir && length $dir;
 478                 foreach my $file (glob("$dir/plugins/*")) {
 479                         $ret{basename($file)}=1 if -x $file;
 480                 }
 481         }
 482
 483         return keys %ret;
 484 } #}}}
 485
 486 sub loadplugins () { #{{{
 487         if (defined $config{libdir} && length $config{libdir}) {
 488                 unshift @INC, possibly_foolish_untaint($config{libdir});
 489         }
 490
 491         foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
 492                 loadplugin($plugin);
 493         }
 494
 495         if ($config{rcs}) {
 496                 if (exists $IkiWiki::hooks{rcs}) {
 497                         error(gettext("cannot use multiple rcs plugins"));
 498                 }
 499                 loadplugin($config{rcs});
 500         }
 501         if (! exists $IkiWiki::hooks{rcs}) {
 502                 loadplugin("norcs");
 503         }
 504
 505         run_hooks(getopt => sub { shift->() });
 506         if (grep /^-/, @ARGV) {
 507                 print STDERR "Unknown option: $_\n"
 508                         foreach grep /^-/, @ARGV;
 509                 usage();
 510         }
 511
 512         return 1;
 513 } #}}}
 514
 515 sub loadplugin ($) { #{{{
 516         my $plugin=shift;
 517
 518         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 519
 520         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 521                          "$installdir/lib/ikiwiki") {
 522                 if (defined $dir && -x "$dir/plugins/$plugin") {
 523                         eval { require IkiWiki::Plugin::external };
 524                         if ($@) {
 525                                 my $reason=$@;
 526                                 error(sprintf(gettext("failed to load external plugin needed for %s plugin: %s"), $plugin, $reason));
 527                         }
 528                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 529                         $loaded_plugins{$plugin}=1;
 530                         return 1;
 531                 }
 532         }
 533
 534         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 535         eval qq{use $mod};
 536         if ($@) {
 537                 error("Failed to load plugin $mod: $@");
 538         }
 539         $loaded_plugins{$plugin}=1;
 540         return 1;
 541 } #}}}
 542
 543 sub error ($;$) { #{{{
 544         my $message=shift;
 545         my $cleaner=shift;
 546         log_message('err' => $message) if $config{syslog};
 547         if (defined $cleaner) {
 548                 $cleaner->();
 549         }
 550         die $message."\n";
 551 } #}}}
 552
 553 sub debug ($) { #{{{
 554         return unless $config{verbose};
 555         return log_message(debug => @_);
 556 } #}}}
 557
 558 my $log_open=0;
 559 sub log_message ($$) { #{{{
 560         my $type=shift;
 561
 562         if ($config{syslog}) {
 563                 require Sys::Syslog;
 564                 if (! $log_open) {
 565                         Sys::Syslog::setlogsock('unix');
 566                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 567                         $log_open=1;
 568                 }
 569                 return eval {
 570                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 571                 };
 572         }
 573         elsif (! $config{cgi}) {
 574                 return print "@_\n";
 575         }
 576         else {
 577                 return print STDERR "@_\n";
 578         }
 579 } #}}}
 580
 581 sub possibly_foolish_untaint ($) { #{{{
 582         my $tainted=shift;
 583         my ($untainted)=$tainted=~/(.*)/s;
 584         return $untainted;
 585 } #}}}
 586
 587 sub basename ($) { #{{{
 588         my $file=shift;
 589
 590         $file=~s!.*/+!!;
 591         return $file;
 592 } #}}}
 593
 594 sub dirname ($) { #{{{
 595         my $file=shift;
 596
 597         $file=~s!/*[^/]+$!!;
 598         return $file;
 599 } #}}}
 600
 601 sub pagetype ($) { #{{{
 602         my $page=shift;
 603
 604         if ($page =~ /\.([^.]+)$/) {
 605                 return $1 if exists $hooks{htmlize}{$1};
 606         }
 607         return;
 608 } #}}}
 609
 610 sub isinternal ($) { #{{{
 611         my $page=shift;
 612         return exists $pagesources{$page} &&
 613                 $pagesources{$page} =~ /\._([^.]+)$/;
 614 } #}}}
 615
 616 sub pagename ($) { #{{{
 617         my $file=shift;
 618
 619         my $type=pagetype($file);
 620         my $page=$file;
 621         $page=~s/\Q.$type\E*$// if defined $type;
 622         return $page;
 623 } #}}}
 624
 625 sub targetpage ($$) { #{{{
 626         my $page=shift;
 627         my $ext=shift;
 628
 629         if (! $config{usedirs} || $page =~ /^index$/ ) {
 630                 return $page.".".$ext;
 631         } else {
 632                 return $page."/index.".$ext;
 633         }
 634 } #}}}
 635
 636 sub htmlpage ($) { #{{{
 637         my $page=shift;
 638
 639         return targetpage($page, $config{htmlext});
 640 } #}}}
 641
 642 sub srcfile_stat { #{{{
 643         my $file=shift;
 644         my $nothrow=shift;
 645
 646         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
 647         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 648                 return "$dir/$file", stat(_) if -e "$dir/$file";
 649         }
 650         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 651         return;
 652 } #}}}
 653
 654 sub srcfile ($;$) { #{{{
 655         return (srcfile_stat(@_))[0];
 656 } #}}}
 657
 658 sub add_underlay ($) { #{{{
 659         my $dir=shift;
 660
 661         if ($dir=~/^\//) {
 662                 unshift @{$config{underlaydirs}}, $dir;
 663         }
 664         else {
 665                 unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
 666         }
 667
 668         return 1;
 669 } #}}}
 670
 671 sub readfile ($;$$) { #{{{
 672         my $file=shift;
 673         my $binary=shift;
 674         my $wantfd=shift;
 675
 676         if (-l $file) {
 677                 error("cannot read a symlink ($file)");
 678         }
 679
 680         local $/=undef;
 681         open (my $in, "<", $file) || error("failed to read $file: $!");
 682         binmode($in) if ($binary);
 683         return \*$in if $wantfd;
 684         my $ret=<$in>;
 685         close $in || error("failed to read $file: $!");
 686         return $ret;
 687 } #}}}
 688
 689 sub prep_writefile ($$) { #{{{
 690         my $file=shift;
 691         my $destdir=shift;
 692
 693         my $test=$file;
 694         while (length $test) {
 695                 if (-l "$destdir/$test") {
 696                         error("cannot write to a symlink ($test)");
 697                 }
 698                 $test=dirname($test);
 699         }
 700
 701         my $dir=dirname("$destdir/$file");
 702         if (! -d $dir) {
 703                 my $d="";
 704                 foreach my $s (split(m!/+!, $dir)) {
 705                         $d.="$s/";
 706                         if (! -d $d) {
 707                                 mkdir($d) || error("failed to create directory $d: $!");
 708                         }
 709                 }
 710         }
 711
 712         return 1;
 713 } #}}}
 714
 715 sub writefile ($$$;$$) { #{{{
 716         my $file=shift; # can include subdirs
 717         my $destdir=shift; # directory to put file in
 718         my $content=shift;
 719         my $binary=shift;
 720         my $writer=shift;
 721
 722         prep_writefile($file, $destdir);
 723
 724         my $newfile="$destdir/$file.ikiwiki-new";
 725         if (-l $newfile) {
 726                 error("cannot write to a symlink ($newfile)");
 727         }
 728
 729         my $cleanup = sub { unlink($newfile) };
 730         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 731         binmode($out) if ($binary);
 732         if ($writer) {
 733                 $writer->(\*$out, $cleanup);
 734         }
 735         else {
 736                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 737         }
 738         close $out || error("failed saving $newfile: $!", $cleanup);
 739         rename($newfile, "$destdir/$file") ||
 740                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 741
 742         return 1;
 743 } #}}}
 744
 745 my %cleared;
 746 sub will_render ($$;$) { #{{{
 747         my $page=shift;
 748         my $dest=shift;
 749         my $clear=shift;
 750
 751         # Important security check.
 752         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 753             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
 754                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 755         }
 756
 757         if (! $clear || $cleared{$page}) {
 758                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 759         }
 760         else {
 761                 foreach my $old (@{$renderedfiles{$page}}) {
 762                         delete $destsources{$old};
 763                 }
 764                 $renderedfiles{$page}=[$dest];
 765                 $cleared{$page}=1;
 766         }
 767         $destsources{$dest}=$page;
 768
 769         return 1;
 770 } #}}}
 771
 772 sub bestlink ($$) { #{{{
 773         my $page=shift;
 774         my $link=shift;
 775
 776         my $cwd=$page;
 777         if ($link=~s/^\/+//) {
 778                 # absolute links
 779                 $cwd="";
 780         }
 781         $link=~s/\/$//;
 782
 783         do {
 784                 my $l=$cwd;
 785                 $l.="/" if length $l;
 786                 $l.=$link;
 787
 788                 if (exists $links{$l}) {
 789                         return $l;
 790                 }
 791                 elsif (exists $pagecase{lc $l}) {
 792                         return $pagecase{lc $l};
 793                 }
 794         } while $cwd=~s{/?[^/]+$}{};
 795
 796         if (length $config{userdir}) {
 797                 my $l = "$config{userdir}/".lc($link);
 798                 if (exists $links{$l}) {
 799                         return $l;
 800                 }
 801                 elsif (exists $pagecase{lc $l}) {
 802                         return $pagecase{lc $l};
 803                 }
 804         }
 805
 806         #print STDERR "warning: page $page, broken link: $link\n";
 807         return "";
 808 } #}}}
 809
 810 sub isinlinableimage ($) { #{{{
 811         my $file=shift;
 812
 813         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 814 } #}}}
 815
 816 sub pagetitle ($;$) { #{{{
 817         my $page=shift;
 818         my $unescaped=shift;
 819
 820         if ($unescaped) {
 821                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 822         }
 823         else {
 824                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 825         }
 826
 827         return $page;
 828 } #}}}
 829
 830 sub titlepage ($) { #{{{
 831         my $title=shift;
 832         # support use w/o %config set
 833         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 834         $title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 835         return $title;
 836 } #}}}
 837
 838 sub linkpage ($) { #{{{
 839         my $link=shift;
 840         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 841         $link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 842         return $link;
 843 } #}}}
 844
 845 sub cgiurl (@) { #{{{
 846         my %params=@_;
 847
 848         return $config{cgiurl}."?".
 849                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 850 } #}}}
 851
 852 sub baseurl (;$) { #{{{
 853         my $page=shift;
 854
 855         return "$config{url}/" if ! defined $page;
 856
 857         $page=htmlpage($page);
 858         $page=~s/[^\/]+$//;
 859         $page=~s/[^\/]+\//..\//g;
 860         return $page;
 861 } #}}}
 862
 863 sub abs2rel ($$) { #{{{
 864         # Work around very innefficient behavior in File::Spec if abs2rel
 865         # is passed two relative paths. It's much faster if paths are
 866         # absolute! (Debian bug #376658; fixed in debian unstable now)
 867         my $path="/".shift;
 868         my $base="/".shift;
 869
 870         require File::Spec;
 871         my $ret=File::Spec->abs2rel($path, $base);
 872         $ret=~s/^// if defined $ret;
 873         return $ret;
 874 } #}}}
 875
 876 sub displaytime ($;$) { #{{{
 877         my $time=shift;
 878         my $format=shift;
 879         if (! defined $format) {
 880                 $format=$config{timeformat};
 881         }
 882
 883         # strftime doesn't know about encodings, so make sure
 884         # its output is properly treated as utf8
 885         return decode_utf8(POSIX::strftime($format, localtime($time)));
 886 } #}}}
 887
 888 sub beautify_urlpath ($) { #{{{
 889         my $url=shift;
 890
 891         if ($config{usedirs}) {
 892                 $url =~ s!/index.$config{htmlext}$!/!;
 893         }
 894
 895         # Ensure url is not an empty link, and
 896         # if it's relative, make that explicit to avoid colon confusion.
 897         if ($url !~ /^\//) {
 898                 $url="./$url";
 899         }
 900
 901         return $url;
 902 } #}}}
 903
 904 sub urlto ($$;$) { #{{{
 905         my $to=shift;
 906         my $from=shift;
 907         my $absolute=shift;
 908
 909         if (! length $to) {
 910                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
 911         }
 912
 913         if (! $destsources{$to}) {
 914                 $to=htmlpage($to);
 915         }
 916
 917         if ($absolute) {
 918                 return $config{url}.beautify_urlpath("/".$to);
 919         }
 920
 921         my $link = abs2rel($to, dirname(htmlpage($from)));
 922
 923         return beautify_urlpath($link);
 924 } #}}}
 925
 926 sub htmllink ($$$;@) { #{{{
 927         my $lpage=shift; # the page doing the linking
 928         my $page=shift; # the page that will contain the link (different for inline)
 929         my $link=shift;
 930         my %opts=@_;
 931
 932         $link=~s/\/$//;
 933
 934         my $bestlink;
 935         if (! $opts{forcesubpage}) {
 936                 $bestlink=bestlink($lpage, $link);
 937         }
 938         else {
 939                 $bestlink="$lpage/".lc($link);
 940         }
 941
 942         my $linktext;
 943         if (defined $opts{linktext}) {
 944                 $linktext=$opts{linktext};
 945         }
 946         else {
 947                 $linktext=pagetitle(basename($link));
 948         }
 949
 950         return "<span class=\"selflink\">$linktext</span>"
 951                 if length $bestlink && $page eq $bestlink &&
 952                    ! defined $opts{anchor};
 953
 954         if (! $destsources{$bestlink}) {
 955                 $bestlink=htmlpage($bestlink);
 956
 957                 if (! $destsources{$bestlink}) {
 958                         return $linktext unless length $config{cgiurl};
 959                         return "<span class=\"createlink\"><a href=\"".
 960                                 cgiurl(
 961                                         do => "create",
 962                                         page => lc($link),
 963                                         from => $lpage
 964                                 ).
 965                                 "\" rel=\"nofollow\">?</a>$linktext</span>"
 966                 }
 967         }
 968
 969         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
 970         $bestlink=beautify_urlpath($bestlink);
 971
 972         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
 973                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
 974         }
 975
 976         if (defined $opts{anchor}) {
 977                 $bestlink.="#".$opts{anchor};
 978         }
 979
 980         my @attrs;
 981         if (defined $opts{rel}) {
 982                 push @attrs, ' rel="'.$opts{rel}.'"';
 983         }
 984         if (defined $opts{class}) {
 985                 push @attrs, ' class="'.$opts{class}.'"';
 986         }
 987
 988         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
 989 } #}}}
 990
 991 sub userlink ($) { #{{{
 992         my $user=shift;
 993
 994         my $oiduser=eval { openiduser($user) };
 995         if (defined $oiduser) {
 996                 return "<a href=\"$user\">$oiduser</a>";
 997         }
 998         else {
 999                 eval q{use CGI 'escapeHTML'};
1000                 error($@) if $@;
1001
1002                 return htmllink("", "", escapeHTML(
1003                         length $config{userdir} ? $config{userdir}."/".$user : $user
1004                 ), noimageinline => 1);
1005         }
1006 } #}}}
1007
1008 sub htmlize ($$$$) { #{{{
1009         my $page=shift;
1010         my $destpage=shift;
1011         my $type=shift;
1012         my $content=shift;
1013
1014         my $oneline = $content !~ /\n/;
1015
1016         if (exists $hooks{htmlize}{$type}) {
1017                 $content=$hooks{htmlize}{$type}{call}->(
1018                         page => $page,
1019                         content => $content,
1020                 );
1021         }
1022         else {
1023                 error("htmlization of $type not supported");
1024         }
1025
1026         run_hooks(sanitize => sub {
1027                 $content=shift->(
1028                         page => $page,
1029                         destpage => $destpage,
1030                         content => $content,
1031                 );
1032         });
1033
1034         if ($oneline) {
1035                 # hack to get rid of enclosing junk added by markdown
1036                 # and other htmlizers
1037                 $content=~s/^<p>//i;
1038                 $content=~s/<\/p>$//i;
1039                 chomp $content;
1040         }
1041
1042         return $content;
1043 } #}}}
1044
1045 sub linkify ($$$) { #{{{
1046         my $page=shift;
1047         my $destpage=shift;
1048         my $content=shift;
1049
1050         run_hooks(linkify => sub {
1051                 $content=shift->(
1052                         page => $page,
1053                         destpage => $destpage,
1054                         content => $content,
1055                 );
1056         });
1057
1058         return $content;
1059 } #}}}
1060
1061 our %preprocessing;
1062 our $preprocess_preview=0;
1063 sub preprocess ($$$;$$) { #{{{
1064         my $page=shift; # the page the data comes from
1065         my $destpage=shift; # the page the data will appear in (different for inline)
1066         my $content=shift;
1067         my $scan=shift;
1068         my $preview=shift;
1069
1070         # Using local because it needs to be set within any nested calls
1071         # of this function.
1072         local $preprocess_preview=$preview if defined $preview;
1073
1074         my $handle=sub {
1075                 my $escape=shift;
1076                 my $prefix=shift;
1077                 my $command=shift;
1078                 my $params=shift;
1079                 $params="" if ! defined $params;
1080
1081                 if (length $escape) {
1082                         return "[[$prefix$command $params]]";
1083                 }
1084                 elsif (exists $hooks{preprocess}{$command}) {
1085                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1086                         # Note: preserve order of params, some plugins may
1087                         # consider it significant.
1088                         my @params;
1089                         while ($params =~ m{
1090                                 (?:([-\w]+)=)?          # 1: named parameter key?
1091                                 (?:
1092                                         """(.*?)"""     # 2: triple-quoted value
1093                                 |
1094                                         "([^"]+)"       # 3: single-quoted value
1095                                 |
1096                                         (\S+)           # 4: unquoted value
1097                                 )
1098                                 (?:\s+|$)               # delimiter to next param
1099                         }sgx) {
1100                                 my $key=$1;
1101                                 my $val;
1102                                 if (defined $2) {
1103                                         $val=$2;
1104                                         $val=~s/\r\n/\n/mg;
1105                                         $val=~s/^\n+//g;
1106                                         $val=~s/\n+$//g;
1107                                 }
1108                                 elsif (defined $3) {
1109                                         $val=$3;
1110                                 }
1111                                 elsif (defined $4) {
1112                                         $val=$4;
1113                                 }
1114
1115                                 if (defined $key) {
1116                                         push @params, $key, $val;
1117                                 }
1118                                 else {
1119                                         push @params, $val, '';
1120                                 }
1121                         }
1122                         if ($preprocessing{$page}++ > 3) {
1123                                 # Avoid loops of preprocessed pages preprocessing
1124                                 # other pages that preprocess them, etc.
1125                                 return "[[!$command <span class=\"error\">".
1126                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1127                                                 $page, $preprocessing{$page}).
1128                                         "</span>]]";
1129                         }
1130                         my $ret;
1131                         if (! $scan) {
1132                                 $ret=eval {
1133                                         $hooks{preprocess}{$command}{call}->(
1134                                                 @params,
1135                                                 page => $page,
1136                                                 destpage => $destpage,
1137                                                 preview => $preprocess_preview,
1138                                         );
1139                                 };
1140                                 if ($@) {
1141                                         chomp $@;
1142                                         $ret="[[!$command <span class=\"error\">".
1143                                                 gettext("Error").": $@"."</span>]]";
1144                                 }
1145                         }
1146                         else {
1147                                 # use void context during scan pass
1148                                 eval {
1149                                         $hooks{preprocess}{$command}{call}->(
1150                                                 @params,
1151                                                 page => $page,
1152                                                 destpage => $destpage,
1153                                                 preview => $preprocess_preview,
1154                                         );
1155                                 };
1156                                 $ret="";
1157                         }
1158                         $preprocessing{$page}--;
1159                         return $ret;
1160                 }
1161                 else {
1162                         return "[[$prefix$command $params]]";
1163                 }
1164         };
1165
1166         my $regex;
1167         if ($config{prefix_directives}) {
1168                 $regex = qr{
1169                         (\\?)           # 1: escape?
1170                         \[\[(!)         # directive open; 2: prefix
1171                         ([-\w]+)        # 3: command
1172                         (               # 4: the parameters..
1173                                 \s+     # Must have space if parameters present
1174                                 (?:
1175                                         (?:[-\w]+=)?            # named parameter key?
1176                                         (?:
1177                                                 """.*?"""       # triple-quoted value
1178                                                 |
1179                                                 "[^"]+"         # single-quoted value
1180                                                 |
1181                                                 [^\s\]]+        # unquoted value
1182                                         )
1183                                         \s*                     # whitespace or end
1184                                                                 # of directive
1185                                 )
1186                         *)?             # 0 or more parameters
1187                         \]\]            # directive closed
1188                 }sx;
1189         }
1190         else {
1191                 $regex = qr{
1192                         (\\?)           # 1: escape?
1193                         \[\[(!?)        # directive open; 2: optional prefix
1194                         ([-\w]+)        # 3: command
1195                         \s+
1196                         (               # 4: the parameters..
1197                                 (?:
1198                                         (?:[-\w]+=)?            # named parameter key?
1199                                         (?:
1200                                                 """.*?"""       # triple-quoted value
1201                                                 |
1202                                                 "[^"]+"         # single-quoted value
1203                                                 |
1204                                                 [^\s\]]+        # unquoted value
1205                                         )
1206                                         \s*                     # whitespace or end
1207                                                                 # of directive
1208                                 )
1209                         *)              # 0 or more parameters
1210                         \]\]            # directive closed
1211                 }sx;
1212         }
1213
1214         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1215         return $content;
1216 } #}}}
1217
1218 sub filter ($$$) { #{{{
1219         my $page=shift;
1220         my $destpage=shift;
1221         my $content=shift;
1222
1223         run_hooks(filter => sub {
1224                 $content=shift->(page => $page, destpage => $destpage,
1225                         content => $content);
1226         });
1227
1228         return $content;
1229 } #}}}
1230
1231 sub indexlink () { #{{{
1232         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1233 } #}}}
1234
1235 my $wikilock;
1236
1237 sub lockwiki (;$) { #{{{
1238         my $wait=@_ ? shift : 1;
1239         # Take an exclusive lock on the wiki to prevent multiple concurrent
1240         # run issues. The lock will be dropped on program exit.
1241         if (! -d $config{wikistatedir}) {
1242                 mkdir($config{wikistatedir});
1243         }
1244         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1245                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1246         if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
1247                 if ($wait) {
1248                         debug("wiki seems to be locked, waiting for lock");
1249                         my $wait=600; # arbitrary, but don't hang forever to
1250                                       # prevent process pileup
1251                         for (1..$wait) {
1252                                 return if flock($wikilock, 2 | 4);
1253                                 sleep 1;
1254                         }
1255                         error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
1256                 }
1257                 else {
1258                         return 0;
1259                 }
1260         }
1261         return 1;
1262 } #}}}
1263
1264 sub unlockwiki () { #{{{
1265         return close($wikilock) if $wikilock;
1266         return;
1267 } #}}}
1268
1269 my $commitlock;
1270
1271 sub commit_hook_enabled () { #{{{
1272         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1273                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1274         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1275                 close($commitlock) || error("failed closing commitlock: $!");
1276                 return 0;
1277         }
1278         close($commitlock) || error("failed closing commitlock: $!");
1279         return 1;
1280 } #}}}
1281
1282 sub disable_commit_hook () { #{{{
1283         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1284                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1285         if (! flock($commitlock, 2)) { # LOCK_EX
1286                 error("failed to get commit lock");
1287         }
1288         return 1;
1289 } #}}}
1290
1291 sub enable_commit_hook () { #{{{
1292         return close($commitlock) if $commitlock;
1293         return;
1294 } #}}}
1295
1296 sub loadindex () { #{{{
1297         %oldrenderedfiles=%pagectime=();
1298         if (! $config{rebuild}) {
1299                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1300                 %destsources=%renderedfiles=%pagecase=%pagestate=();
1301         }
1302         my $in;
1303         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1304                 if (-e "$config{wikistatedir}/index") {
1305                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1306                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1307                 }
1308                 else {
1309                         return;
1310                 }
1311         }
1312         my $ret=Storable::fd_retrieve($in);
1313         if (! defined $ret) {
1314                 return 0;
1315         }
1316         my %index=%$ret;
1317         foreach my $src (keys %index) {
1318                 my %d=%{$index{$src}};
1319                 my $page=pagename($src);
1320                 $pagectime{$page}=$d{ctime};
1321                 if (! $config{rebuild}) {
1322                         $pagesources{$page}=$src;
1323                         $pagemtime{$page}=$d{mtime};
1324                         $renderedfiles{$page}=$d{dest};
1325                         if (exists $d{links} && ref $d{links}) {
1326                                 $links{$page}=$d{links};
1327                                 $oldlinks{$page}=[@{$d{links}}];
1328                         }
1329                         if (exists $d{depends}) {
1330                                 $depends{$page}=$d{depends};
1331                         }
1332                         if (exists $d{state}) {
1333                                 $pagestate{$page}=$d{state};
1334                         }
1335                 }
1336                 $oldrenderedfiles{$page}=[@{$d{dest}}];
1337         }
1338         foreach my $page (keys %pagesources) {
1339                 $pagecase{lc $page}=$page;
1340         }
1341         foreach my $page (keys %renderedfiles) {
1342                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1343         }
1344         return close($in);
1345 } #}}}
1346
1347 sub saveindex () { #{{{
1348         run_hooks(savestate => sub { shift->() });
1349
1350         my %hookids;
1351         foreach my $type (keys %hooks) {
1352                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1353         }
1354         my @hookids=keys %hookids;
1355
1356         if (! -d $config{wikistatedir}) {
1357                 mkdir($config{wikistatedir});
1358         }
1359         my $newfile="$config{wikistatedir}/indexdb.new";
1360         my $cleanup = sub { unlink($newfile) };
1361         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1362         my %index;
1363         foreach my $page (keys %pagemtime) {
1364                 next unless $pagemtime{$page};
1365                 my $src=$pagesources{$page};
1366
1367                 $index{$src}={
1368                         ctime => $pagectime{$page},
1369                         mtime => $pagemtime{$page},
1370                         dest => $renderedfiles{$page},
1371                         links => $links{$page},
1372                 };
1373
1374                 if (exists $depends{$page}) {
1375                         $index{$src}{depends} = $depends{$page};
1376                 }
1377
1378                 if (exists $pagestate{$page}) {
1379                         foreach my $id (@hookids) {
1380                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1381                                         $index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1382                                 }
1383                         }
1384                 }
1385         }
1386         my $ret=Storable::nstore_fd(\%index, $out);
1387         return if ! defined $ret || ! $ret;
1388         close $out || error("failed saving to $newfile: $!", $cleanup);
1389         rename($newfile, "$config{wikistatedir}/indexdb") ||
1390                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1391
1392         return 1;
1393 } #}}}
1394
1395 sub template_file ($) { #{{{
1396         my $template=shift;
1397
1398         foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
1399                 return "$dir/$template" if -e "$dir/$template";
1400         }
1401         return;
1402 } #}}}
1403
1404 sub template_params (@) { #{{{
1405         my $filename=template_file(shift);
1406
1407         if (! defined $filename) {
1408                 return if wantarray;
1409                 return "";
1410         }
1411
1412         my @ret=(
1413                 filter => sub {
1414                         my $text_ref = shift;
1415                         ${$text_ref} = decode_utf8(${$text_ref});
1416                 },
1417                 filename => $filename,
1418                 loop_context_vars => 1,
1419                 die_on_bad_params => 0,
1420                 @_
1421         );
1422         return wantarray ? @ret : {@ret};
1423 } #}}}
1424
1425 sub template ($;@) { #{{{
1426         require HTML::Template;
1427         return HTML::Template->new(template_params(@_));
1428 } #}}}
1429
1430 sub misctemplate ($$;@) { #{{{
1431         my $title=shift;
1432         my $pagebody=shift;
1433
1434         my $template=template("misc.tmpl");
1435         $template->param(
1436                 title => $title,
1437                 indexlink => indexlink(),
1438                 wikiname => $config{wikiname},
1439                 pagebody => $pagebody,
1440                 baseurl => baseurl(),
1441                 @_,
1442         );
1443         run_hooks(pagetemplate => sub {
1444                 shift->(page => "", destpage => "", template => $template);
1445         });
1446         return $template->output;
1447 }#}}}
1448
1449 sub hook (@) { # {{{
1450         my %param=@_;
1451
1452         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1453                 error 'hook requires type, call, and id parameters';
1454         }
1455
1456         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1457
1458         $hooks{$param{type}}{$param{id}}=\%param;
1459         return 1;
1460 } # }}}
1461
1462 sub run_hooks ($$) { # {{{
1463         # Calls the given sub for each hook of the given type,
1464         # passing it the hook function to call.
1465         my $type=shift;
1466         my $sub=shift;
1467
1468         if (exists $hooks{$type}) {
1469                 my @deferred;
1470                 foreach my $id (keys %{$hooks{$type}}) {
1471                         if ($hooks{$type}{$id}{last}) {
1472                                 push @deferred, $id;
1473                                 next;
1474                         }
1475                         $sub->($hooks{$type}{$id}{call});
1476                 }
1477                 foreach my $id (@deferred) {
1478                         $sub->($hooks{$type}{$id}{call});
1479                 }
1480         }
1481
1482         return 1;
1483 } #}}}
1484
1485 sub rcs_update () { #{{{
1486         $hooks{rcs}{rcs_update}{call}->(@_);
1487 } #}}}
1488
1489 sub rcs_prepedit ($) { #{{{
1490         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1491 } #}}}
1492
1493 sub rcs_commit ($$$;$$) { #{{{
1494         $hooks{rcs}{rcs_commit}{call}->(@_);
1495 } #}}}
1496
1497 sub rcs_commit_staged ($$$) { #{{{
1498         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1499 } #}}}
1500
1501 sub rcs_add ($) { #{{{
1502         $hooks{rcs}{rcs_add}{call}->(@_);
1503 } #}}}
1504
1505 sub rcs_remove ($) { #{{{
1506         $hooks{rcs}{rcs_remove}{call}->(@_);
1507 } #}}}
1508
1509 sub rcs_rename ($$) { #{{{
1510         $hooks{rcs}{rcs_rename}{call}->(@_);
1511 } #}}}
1512
1513 sub rcs_recentchanges ($) { #{{{
1514         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1515 } #}}}
1516
1517 sub rcs_diff ($) { #{{{
1518         $hooks{rcs}{rcs_diff}{call}->(@_);
1519 } #}}}
1520
1521 sub rcs_getctime ($) { #{{{
1522         $hooks{rcs}{rcs_getctime}{call}->(@_);
1523 } #}}}
1524
1525 sub globlist_to_pagespec ($) { #{{{
1526         my @globlist=split(' ', shift);
1527
1528         my (@spec, @skip);
1529         foreach my $glob (@globlist) {
1530                 if ($glob=~/^!(.*)/) {
1531                         push @skip, $glob;
1532                 }
1533                 else {
1534                         push @spec, $glob;
1535                 }
1536         }
1537
1538         my $spec=join(' or ', @spec);
1539         if (@skip) {
1540                 my $skip=join(' and ', @skip);
1541                 if (length $spec) {
1542                         $spec="$skip and ($spec)";
1543                 }
1544                 else {
1545                         $spec=$skip;
1546                 }
1547         }
1548         return $spec;
1549 } #}}}
1550
1551 sub is_globlist ($) { #{{{
1552         my $s=shift;
1553         return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
1554 } #}}}
1555
1556 sub safequote ($) { #{{{
1557         my $s=shift;
1558         $s=~s/[{}]//g;
1559         return "q{$s}";
1560 } #}}}
1561
1562 sub add_depends ($$) { #{{{
1563         my $page=shift;
1564         my $pagespec=shift;
1565
1566         return unless pagespec_valid($pagespec);
1567
1568         if (! exists $depends{$page}) {
1569                 $depends{$page}=$pagespec;
1570         }
1571         else {
1572                 $depends{$page}=pagespec_merge($depends{$page}, $pagespec);
1573         }
1574
1575         return 1;
1576 } # }}}
1577
1578 sub file_pruned ($$) { #{{{
1579         require File::Spec;
1580         my $file=File::Spec->canonpath(shift);
1581         my $base=File::Spec->canonpath(shift);
1582         $file =~ s#^\Q$base\E/+##;
1583
1584         my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1585         return $file =~ m/$regexp/ && $file ne $base;
1586 } #}}}
1587
1588 sub gettext { #{{{
1589         # Only use gettext in the rare cases it's needed.
1590         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1591             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1592             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1593                 if (! $gettext_obj) {
1594                         $gettext_obj=eval q{
1595                                 use Locale::gettext q{textdomain};
1596                                 Locale::gettext->domain('ikiwiki')
1597                         };
1598                         if ($@) {
1599                                 print STDERR "$@";
1600                                 $gettext_obj=undef;
1601                                 return shift;
1602                         }
1603                 }
1604                 return $gettext_obj->get(shift);
1605         }
1606         else {
1607                 return shift;
1608         }
1609 } #}}}
1610
1611 sub yesno ($) { #{{{
1612         my $val=shift;
1613
1614         return (defined $val && lc($val) eq gettext("yes"));
1615 } #}}}
1616
1617 sub pagespec_merge ($$) { #{{{
1618         my $a=shift;
1619         my $b=shift;
1620
1621         return $a if $a eq $b;
1622
1623         # Support for old-style GlobLists.
1624         if (is_globlist($a)) {
1625                 $a=globlist_to_pagespec($a);
1626         }
1627         if (is_globlist($b)) {
1628                 $b=globlist_to_pagespec($b);
1629         }
1630
1631         return "($a) or ($b)";
1632 } #}}}
1633
1634 sub pagespec_translate ($) { #{{{
1635         my $spec=shift;
1636
1637         # Support for old-style GlobLists.
1638         if (is_globlist($spec)) {
1639                 $spec=globlist_to_pagespec($spec);
1640         }
1641
1642         # Convert spec to perl code.
1643         my $code="";
1644         while ($spec=~m{
1645                 \s*             # ignore whitespace
1646                 (               # 1: match a single word
1647                         \!              # !
1648                 |
1649                         \(              # (
1650                 |
1651                         \)              # )
1652                 |
1653                         \w+\([^\)]*\)   # command(params)
1654                 |
1655                         [^\s()]+        # any other text
1656                 )
1657                 \s*             # ignore whitespace
1658         }igx) {
1659                 my $word=$1;
1660                 if (lc $word eq 'and') {
1661                         $code.=' &&';
1662                 }
1663                 elsif (lc $word eq 'or') {
1664                         $code.=' ||';
1665                 }
1666                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
1667                         $code.=' '.$word;
1668                 }
1669                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
1670                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
1671                                 $code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
1672                         }
1673                         else {
1674                                 $code.=' 0';
1675                         }
1676                 }
1677                 else {
1678                         $code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
1679                 }
1680         }
1681
1682         if (! length $code) {
1683                 $code=0;
1684         }
1685
1686         no warnings;
1687         return eval 'sub { my $page=shift; '.$code.' }';
1688 } #}}}
1689
1690 sub pagespec_match ($$;@) { #{{{
1691         my $page=shift;
1692         my $spec=shift;
1693         my @params=@_;
1694
1695         # Backwards compatability with old calling convention.
1696         if (@params == 1) {
1697                 unshift @params, 'location';
1698         }
1699
1700         my $sub=pagespec_translate($spec);
1701         return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
1702         return $sub->($page, @params);
1703 } #}}}
1704
1705 sub pagespec_valid ($) { #{{{
1706         my $spec=shift;
1707
1708         my $sub=pagespec_translate($spec);
1709         return ! $@;
1710 } #}}}
1711
1712 sub glob2re ($) { #{{{
1713         my $re=quotemeta(shift);
1714         $re=~s/\\\*/.*/g;
1715         $re=~s/\\\?/./g;
1716         return $re;
1717 } #}}}
1718
1719 package IkiWiki::FailReason;
1720
1721 use overload ( #{{{
1722         '""'    => sub { ${$_[0]} },
1723         '0+'    => sub { 0 },
1724         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
1725         fallback => 1,
1726 ); #}}}
1727
1728 sub new { #{{{
1729         my $class = shift;
1730         my $value = shift;
1731         return bless \$value, $class;
1732 } #}}}
1733
1734 package IkiWiki::SuccessReason;
1735
1736 use overload ( #{{{
1737         '""'    => sub { ${$_[0]} },
1738         '0+'    => sub { 1 },
1739         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
1740         fallback => 1,
1741 ); #}}}
1742
1743 sub new { #{{{
1744         my $class = shift;
1745         my $value = shift;
1746         return bless \$value, $class;
1747 }; #}}}
1748
1749 package IkiWiki::PageSpec;
1750
1751 sub match_glob ($$;@) { #{{{
1752         my $page=shift;
1753         my $glob=shift;
1754         my %params=@_;
1755
1756         my $from=exists $params{location} ? $params{location} : '';
1757
1758         # relative matching
1759         if ($glob =~ m!^\./!) {
1760                 $from=~s#/?[^/]+$##;
1761                 $glob=~s#^\./##;
1762                 $glob="$from/$glob" if length $from;
1763         }
1764
1765         my $regexp=IkiWiki::glob2re($glob);
1766         if ($page=~/^$regexp$/i) {
1767                 if (! IkiWiki::isinternal($page) || $params{internal}) {
1768                         return IkiWiki::SuccessReason->new("$glob matches $page");
1769                 }
1770                 else {
1771                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
1772                 }
1773         }
1774         else {
1775                 return IkiWiki::FailReason->new("$glob does not match $page");
1776         }
1777 } #}}}
1778
1779 sub match_internal ($$;@) { #{{{
1780         return match_glob($_[0], $_[1], @_, internal => 1)
1781 } #}}}
1782
1783 sub match_link ($$;@) { #{{{
1784         my $page=shift;
1785         my $link=lc(shift);
1786         my %params=@_;
1787
1788         my $from=exists $params{location} ? $params{location} : '';
1789
1790         # relative matching
1791         if ($link =~ m!^\.! && defined $from) {
1792                 $from=~s#/?[^/]+$##;
1793                 $link=~s#^\./##;
1794                 $link="$from/$link" if length $from;
1795         }
1796
1797         my $links = $IkiWiki::links{$page};
1798         return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
1799         my $bestlink = IkiWiki::bestlink($from, $link);
1800         foreach my $p (@{$links}) {
1801                 if (length $bestlink) {
1802                         return IkiWiki::SuccessReason->new("$page links to $link")
1803                                 if $bestlink eq IkiWiki::bestlink($page, $p);
1804                 }
1805                 else {
1806                         return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
1807                                 if match_glob($p, $link, %params);
1808                 }
1809         }
1810         return IkiWiki::FailReason->new("$page does not link to $link");
1811 } #}}}
1812
1813 sub match_backlink ($$;@) { #{{{
1814         return match_link($_[1], $_[0], @_);
1815 } #}}}
1816
1817 sub match_created_before ($$;@) { #{{{
1818         my $page=shift;
1819         my $testpage=shift;
1820
1821         if (exists $IkiWiki::pagectime{$testpage}) {
1822                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
1823                         return IkiWiki::SuccessReason->new("$page created before $testpage");
1824                 }
1825                 else {
1826                         return IkiWiki::FailReason->new("$page not created before $testpage");
1827                 }
1828         }
1829         else {
1830                 return IkiWiki::FailReason->new("$testpage has no ctime");
1831         }
1832 } #}}}
1833
1834 sub match_created_after ($$;@) { #{{{
1835         my $page=shift;
1836         my $testpage=shift;
1837
1838         if (exists $IkiWiki::pagectime{$testpage}) {
1839                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
1840                         return IkiWiki::SuccessReason->new("$page created after $testpage");
1841                 }
1842                 else {
1843                         return IkiWiki::FailReason->new("$page not created after $testpage");
1844                 }
1845         }
1846         else {
1847                 return IkiWiki::FailReason->new("$testpage has no ctime");
1848         }
1849 } #}}}
1850
1851 sub match_creation_day ($$;@) { #{{{
1852         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
1853                 return IkiWiki::SuccessReason->new('creation_day matched');
1854         }
1855         else {
1856                 return IkiWiki::FailReason->new('creation_day did not match');
1857         }
1858 } #}}}
1859
1860 sub match_creation_month ($$;@) { #{{{
1861         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
1862                 return IkiWiki::SuccessReason->new('creation_month matched');
1863         }
1864         else {
1865                 return IkiWiki::FailReason->new('creation_month did not match');
1866         }
1867 } #}}}
1868
1869 sub match_creation_year ($$;@) { #{{{
1870         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
1871                 return IkiWiki::SuccessReason->new('creation_year matched');
1872         }
1873         else {
1874                 return IkiWiki::FailReason->new('creation_year did not match');
1875         }
1876 } #}}}
1877
1878 1