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 %wikistate %renderedfiles %oldrenderedfiles
  16         %pagesources %destsources %depends %depends_simple %hooks
  17         %forcerebuild %loaded_plugins %typedlinks %oldtypedlinks
  18         %autofiles};
  19
  20 use Exporter q{import};
  21 our @EXPORT = qw(hook debug error template htmlpage deptype
  22         add_depends pagespec_match pagespec_match_list bestlink
  23         htmllink readfile writefile pagetype srcfile pagename
  24         displaytime will_render gettext ngettext urlto targetpage
  25         add_underlay pagetitle titlepage linkpage newpagefile
  26         inject add_link add_autofile
  27         %config %links %pagestate %wikistate %renderedfiles
  28         %pagesources %destsources %typedlinks);
  29 our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
  30 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
  31 our $installdir='/usr'; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
  32
  33 # Page dependency types.
  34 our $DEPEND_CONTENT=1;
  35 our $DEPEND_PRESENCE=2;
  36 our $DEPEND_LINKS=4;
  37
  38 # Optimisation.
  39 use Memoize;
  40 memoize("abs2rel");
  41 memoize("sortspec_translate");
  42 memoize("pagespec_translate");
  43 memoize("template_file");
  44
  45 sub getsetup () {
  46         wikiname => {
  47                 type => "string",
  48                 default => "wiki",
  49                 description => "name of the wiki",
  50                 safe => 1,
  51                 rebuild => 1,
  52         },
  53         adminemail => {
  54                 type => "string",
  55                 default => undef,
  56                 example => 'me@example.com',
  57                 description => "contact email for wiki",
  58                 safe => 1,
  59                 rebuild => 0,
  60         },
  61         adminuser => {
  62                 type => "string",
  63                 default => [],
  64                 description => "users who are wiki admins",
  65                 safe => 1,
  66                 rebuild => 0,
  67         },
  68         banned_users => {
  69                 type => "string",
  70                 default => [],
  71                 description => "users who are banned from the wiki",
  72                 safe => 1,
  73                 rebuild => 0,
  74         },
  75         srcdir => {
  76                 type => "string",
  77                 default => undef,
  78                 example => "$ENV{HOME}/wiki",
  79                 description => "where the source of the wiki is located",
  80                 safe => 0, # path
  81                 rebuild => 1,
  82         },
  83         destdir => {
  84                 type => "string",
  85                 default => undef,
  86                 example => "/var/www/wiki",
  87                 description => "where to build the wiki",
  88                 safe => 0, # path
  89                 rebuild => 1,
  90         },
  91         url => {
  92                 type => "string",
  93                 default => '',
  94                 example => "http://example.com/wiki",
  95                 description => "base url to the wiki",
  96                 safe => 1,
  97                 rebuild => 1,
  98         },
  99         cgiurl => {
 100                 type => "string",
 101                 default => '',
 102                 example => "http://example.com/wiki/ikiwiki.cgi",
 103                 description => "url to the ikiwiki.cgi",
 104                 safe => 1,
 105                 rebuild => 1,
 106         },
 107         cgi_wrapper => {
 108                 type => "string",
 109                 default => '',
 110                 example => "/var/www/wiki/ikiwiki.cgi",
 111                 description => "filename of cgi wrapper to generate",
 112                 safe => 0, # file
 113                 rebuild => 0,
 114         },
 115         cgi_wrappermode => {
 116                 type => "string",
 117                 default => '06755',
 118                 description => "mode for cgi_wrapper (can safely be made suid)",
 119                 safe => 0,
 120                 rebuild => 0,
 121         },
 122         rcs => {
 123                 type => "string",
 124                 default => '',
 125                 description => "rcs backend to use",
 126                 safe => 0, # don't allow overriding
 127                 rebuild => 0,
 128         },
 129         default_plugins => {
 130                 type => "internal",
 131                 default => [qw{mdwn link inline meta htmlscrubber passwordauth
 132                                 openid signinedit lockedit conditional
 133                                 recentchanges parentlinks editpage}],
 134                 description => "plugins to enable by default",
 135                 safe => 0,
 136                 rebuild => 1,
 137         },
 138         add_plugins => {
 139                 type => "string",
 140                 default => [],
 141                 description => "plugins to add to the default configuration",
 142                 safe => 1,
 143                 rebuild => 1,
 144         },
 145         disable_plugins => {
 146                 type => "string",
 147                 default => [],
 148                 description => "plugins to disable",
 149                 safe => 1,
 150                 rebuild => 1,
 151         },
 152         templatedir => {
 153                 type => "string",
 154                 default => "$installdir/share/ikiwiki/templates",
 155                 description => "location of template files",
 156                 advanced => 1,
 157                 safe => 0, # path
 158                 rebuild => 1,
 159         },
 160         underlaydir => {
 161                 type => "string",
 162                 default => "$installdir/share/ikiwiki/basewiki",
 163                 description => "base wiki source location",
 164                 advanced => 1,
 165                 safe => 0, # path
 166                 rebuild => 0,
 167         },
 168         underlaydirbase => {
 169                 type => "internal",
 170                 default => "$installdir/share/ikiwiki",
 171                 description => "parent directory containing additional underlays",
 172                 safe => 0,
 173                 rebuild => 0,
 174         },
 175         wrappers => {
 176                 type => "internal",
 177                 default => [],
 178                 description => "wrappers to generate",
 179                 safe => 0,
 180                 rebuild => 0,
 181         },
 182         underlaydirs => {
 183                 type => "internal",
 184                 default => [],
 185                 description => "additional underlays to use",
 186                 safe => 0,
 187                 rebuild => 0,
 188         },
 189         verbose => {
 190                 type => "boolean",
 191                 example => 1,
 192                 description => "display verbose messages?",
 193                 safe => 1,
 194                 rebuild => 0,
 195         },
 196         syslog => {
 197                 type => "boolean",
 198                 example => 1,
 199                 description => "log to syslog?",
 200                 safe => 1,
 201                 rebuild => 0,
 202         },
 203         usedirs => {
 204                 type => "boolean",
 205                 default => 1,
 206                 description => "create output files named page/index.html?",
 207                 safe => 0, # changing requires manual transition
 208                 rebuild => 1,
 209         },
 210         prefix_directives => {
 211                 type => "boolean",
 212                 default => 1,
 213                 description => "use '!'-prefixed preprocessor directives?",
 214                 safe => 0, # changing requires manual transition
 215                 rebuild => 1,
 216         },
 217         indexpages => {
 218                 type => "boolean",
 219                 default => 0,
 220                 description => "use page/index.mdwn source files",
 221                 safe => 1,
 222                 rebuild => 1,
 223         },
 224         discussion => {
 225                 type => "boolean",
 226                 default => 1,
 227                 description => "enable Discussion pages?",
 228                 safe => 1,
 229                 rebuild => 1,
 230         },
 231         discussionpage => {
 232                 type => "string",
 233                 default => gettext("Discussion"),
 234                 description => "name of Discussion pages",
 235                 safe => 1,
 236                 rebuild => 1,
 237         },
 238         sslcookie => {
 239                 type => "boolean",
 240                 default => 0,
 241                 description => "only send cookies over SSL connections?",
 242                 advanced => 1,
 243                 safe => 1,
 244                 rebuild => 0,
 245         },
 246         default_pageext => {
 247                 type => "string",
 248                 default => "mdwn",
 249                 description => "extension to use for new pages",
 250                 safe => 0, # not sanitized
 251                 rebuild => 0,
 252         },
 253         htmlext => {
 254                 type => "string",
 255                 default => "html",
 256                 description => "extension to use for html files",
 257                 safe => 0, # not sanitized
 258                 rebuild => 1,
 259         },
 260         timeformat => {
 261                 type => "string",
 262                 default => '%c',
 263                 description => "strftime format string to display date",
 264                 advanced => 1,
 265                 safe => 1,
 266                 rebuild => 1,
 267         },
 268         locale => {
 269                 type => "string",
 270                 default => undef,
 271                 example => "en_US.UTF-8",
 272                 description => "UTF-8 locale to use",
 273                 advanced => 1,
 274                 safe => 0,
 275                 rebuild => 1,
 276         },
 277         userdir => {
 278                 type => "string",
 279                 default => "",
 280                 example => "users",
 281                 description => "put user pages below specified page",
 282                 safe => 1,
 283                 rebuild => 1,
 284         },
 285         numbacklinks => {
 286                 type => "integer",
 287                 default => 10,
 288                 description => "how many backlinks to show before hiding excess (0 to show all)",
 289                 safe => 1,
 290                 rebuild => 1,
 291         },
 292         hardlink => {
 293                 type => "boolean",
 294                 default => 0,
 295                 description => "attempt to hardlink source files? (optimisation for large files)",
 296                 advanced => 1,
 297                 safe => 0, # paranoia
 298                 rebuild => 0,
 299         },
 300         umask => {
 301                 type => "integer",
 302                 example => "022",
 303                 description => "force ikiwiki to use a particular umask",
 304                 advanced => 1,
 305                 safe => 0, # paranoia
 306                 rebuild => 0,
 307         },
 308         wrappergroup => {
 309                 type => "string",
 310                 example => "ikiwiki",
 311                 description => "group for wrappers to run in",
 312                 advanced => 1,
 313                 safe => 0, # paranoia
 314                 rebuild => 0,
 315         },
 316         libdir => {
 317                 type => "string",
 318                 default => "",
 319                 example => "$ENV{HOME}/.ikiwiki/",
 320                 description => "extra library and plugin directory",
 321                 advanced => 1,
 322                 safe => 0, # directory
 323                 rebuild => 0,
 324         },
 325         ENV => {
 326                 type => "string",
 327                 default => {},
 328                 description => "environment variables",
 329                 safe => 0, # paranoia
 330                 rebuild => 0,
 331         },
 332         include => {
 333                 type => "string",
 334                 default => undef,
 335                 example => '^\.htaccess$',
 336                 description => "regexp of normally excluded files to include",
 337                 advanced => 1,
 338                 safe => 0, # regexp
 339                 rebuild => 1,
 340         },
 341         exclude => {
 342                 type => "string",
 343                 default => undef,
 344                 example => '^(*\.private|Makefile)$',
 345                 description => "regexp of files that should be skipped",
 346                 advanced => 1,
 347                 safe => 0, # regexp
 348                 rebuild => 1,
 349         },
 350         wiki_file_prune_regexps => {
 351                 type => "internal",
 352                 default => [qr/(^|\/)\.\.(\/|$)/, qr/^\//, qr/^\./, qr/\/\./,
 353                         qr/\.x?html?$/, qr/\.ikiwiki-new$/,
 354                         qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
 355                         qr/(^|\/)_MTN\//, qr/(^|\/)_darcs\//,
 356                         qr/(^|\/)CVS\//, qr/\.dpkg-tmp$/],
 357                 description => "regexps of source files to ignore",
 358                 safe => 0,
 359                 rebuild => 1,
 360         },
 361         wiki_file_chars => {
 362                 type => "string",
 363                 description => "specifies the characters that are allowed in source filenames",
 364                 default => "-[:alnum:]+/.:_",
 365                 safe => 0,
 366                 rebuild => 1,
 367         },
 368         wiki_file_regexp => {
 369                 type => "internal",
 370                 description => "regexp of legal source files",
 371                 safe => 0,
 372                 rebuild => 1,
 373         },
 374         web_commit_regexp => {
 375                 type => "internal",
 376                 default => qr/^web commit (by (.*?(?=: |$))|from ([0-9a-fA-F:.]+[0-9a-fA-F])):?(.*)/,
 377                 description => "regexp to parse web commits from logs",
 378                 safe => 0,
 379                 rebuild => 0,
 380         },
 381         cgi => {
 382                 type => "internal",
 383                 default => 0,
 384                 description => "run as a cgi",
 385                 safe => 0,
 386                 rebuild => 0,
 387         },
 388         cgi_disable_uploads => {
 389                 type => "internal",
 390                 default => 1,
 391                 description => "whether CGI should accept file uploads",
 392                 safe => 0,
 393                 rebuild => 0,
 394         },
 395         post_commit => {
 396                 type => "internal",
 397                 default => 0,
 398                 description => "run as a post-commit hook",
 399                 safe => 0,
 400                 rebuild => 0,
 401         },
 402         rebuild => {
 403                 type => "internal",
 404                 default => 0,
 405                 description => "running in rebuild mode",
 406                 safe => 0,
 407                 rebuild => 0,
 408         },
 409         setup => {
 410                 type => "internal",
 411                 default => undef,
 412                 description => "running in setup mode",
 413                 safe => 0,
 414                 rebuild => 0,
 415         },
 416         clean => {
 417                 type => "internal",
 418                 default => 0,
 419                 description => "running in clean mode",
 420                 safe => 0,
 421                 rebuild => 0,
 422         },
 423         refresh => {
 424                 type => "internal",
 425                 default => 0,
 426                 description => "running in refresh mode",
 427                 safe => 0,
 428                 rebuild => 0,
 429         },
 430         test_receive => {
 431                 type => "internal",
 432                 default => 0,
 433                 description => "running in receive test mode",
 434                 safe => 0,
 435                 rebuild => 0,
 436         },
 437         gettime => {
 438                 type => "internal",
 439                 description => "running in gettime mode",
 440                 safe => 0,
 441                 rebuild => 0,
 442         },
 443         w3mmode => {
 444                 type => "internal",
 445                 default => 0,
 446                 description => "running in w3mmode",
 447                 safe => 0,
 448                 rebuild => 0,
 449         },
 450         wikistatedir => {
 451                 type => "internal",
 452                 default => undef,
 453                 description => "path to the .ikiwiki directory holding ikiwiki state",
 454                 safe => 0,
 455                 rebuild => 0,
 456         },
 457         setupfile => {
 458                 type => "internal",
 459                 default => undef,
 460                 description => "path to setup file",
 461                 safe => 0,
 462                 rebuild => 0,
 463         },
 464         setuptype => {
 465                 type => "internal",
 466                 default => "Standard",
 467                 description => "perl class to use to dump setup file",
 468                 safe => 0,
 469                 rebuild => 0,
 470         },
 471         allow_symlinks_before_srcdir => {
 472                 type => "boolean",
 473                 default => 0,
 474                 description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
 475                 safe => 0,
 476                 rebuild => 0,
 477         },
 478 }
 479
 480 sub defaultconfig () {
 481         my %s=getsetup();
 482         my @ret;
 483         foreach my $key (keys %s) {
 484                 push @ret, $key, $s{$key}->{default};
 485         }
 486         use Data::Dumper;
 487         return @ret;
 488 }
 489
 490 sub checkconfig () {
 491         # locale stuff; avoid LC_ALL since it overrides everything
 492         if (defined $ENV{LC_ALL}) {
 493                 $ENV{LANG} = $ENV{LC_ALL};
 494                 delete $ENV{LC_ALL};
 495         }
 496         if (defined $config{locale}) {
 497                 if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 498                         $ENV{LANG}=$config{locale};
 499                         define_gettext();
 500                 }
 501         }
 502
 503         if (! defined $config{wiki_file_regexp}) {
 504                 $config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
 505         }
 506
 507         if (ref $config{ENV} eq 'HASH') {
 508                 foreach my $val (keys %{$config{ENV}}) {
 509                         $ENV{$val}=$config{ENV}{$val};
 510                 }
 511         }
 512
 513         if ($config{w3mmode}) {
 514                 eval q{use Cwd q{abs_path}};
 515                 error($@) if $@;
 516                 $config{srcdir}=possibly_foolish_untaint(abs_path($config{srcdir}));
 517                 $config{destdir}=possibly_foolish_untaint(abs_path($config{destdir}));
 518                 $config{cgiurl}="file:///\$LIB/ikiwiki-w3m.cgi/".$config{cgiurl}
 519                         unless $config{cgiurl} =~ m!file:///!;
 520                 $config{url}="file://".$config{destdir};
 521         }
 522
 523         if ($config{cgi} && ! length $config{url}) {
 524                 error(gettext("Must specify url to wiki with --url when using --cgi"));
 525         }
 526
 527         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
 528                 unless exists $config{wikistatedir} && defined $config{wikistatedir};
 529
 530         if (defined $config{umask}) {
 531                 umask(possibly_foolish_untaint($config{umask}));
 532         }
 533
 534         run_hooks(checkconfig => sub { shift->() });
 535
 536         return 1;
 537 }
 538
 539 sub listplugins () {
 540         my %ret;
 541
 542         foreach my $dir (@INC, $config{libdir}) {
 543                 next unless defined $dir && length $dir;
 544                 foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
 545                         my ($plugin)=$file=~/.*\/(.*)\.pm$/;
 546                         $ret{$plugin}=1;
 547                 }
 548         }
 549         foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
 550                 next unless defined $dir && length $dir;
 551                 foreach my $file (glob("$dir/plugins/*")) {
 552                         $ret{basename($file)}=1 if -x $file;
 553                 }
 554         }
 555
 556         return keys %ret;
 557 }
 558
 559 sub loadplugins () {
 560         if (defined $config{libdir} && length $config{libdir}) {
 561                 unshift @INC, possibly_foolish_untaint($config{libdir});
 562         }
 563
 564         foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
 565                 loadplugin($plugin);
 566         }
 567
 568         if ($config{rcs}) {
 569                 if (exists $hooks{rcs}) {
 570                         error(gettext("cannot use multiple rcs plugins"));
 571                 }
 572                 loadplugin($config{rcs});
 573         }
 574         if (! exists $hooks{rcs}) {
 575                 loadplugin("norcs");
 576         }
 577
 578         run_hooks(getopt => sub { shift->() });
 579         if (grep /^-/, @ARGV) {
 580                 print STDERR "Unknown option (or missing parameter): $_\n"
 581                         foreach grep /^-/, @ARGV;
 582                 usage();
 583         }
 584
 585         return 1;
 586 }
 587
 588 sub loadplugin ($) {
 589         my $plugin=shift;
 590
 591         return if grep { $_ eq $plugin} @{$config{disable_plugins}};
 592
 593         foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 594                          "$installdir/lib/ikiwiki") {
 595                 if (defined $dir && -x "$dir/plugins/$plugin") {
 596                         eval { require IkiWiki::Plugin::external };
 597                         if ($@) {
 598                                 my $reason=$@;
 599                                 error(sprintf(gettext("failed to load external plugin needed for %s plugin: %s"), $plugin, $reason));
 600                         }
 601                         import IkiWiki::Plugin::external "$dir/plugins/$plugin";
 602                         $loaded_plugins{$plugin}=1;
 603                         return 1;
 604                 }
 605         }
 606
 607         my $mod="IkiWiki::Plugin::".possibly_foolish_untaint($plugin);
 608         eval qq{use $mod};
 609         if ($@) {
 610                 error("Failed to load plugin $mod: $@");
 611         }
 612         $loaded_plugins{$plugin}=1;
 613         return 1;
 614 }
 615
 616 sub error ($;$) {
 617         my $message=shift;
 618         my $cleaner=shift;
 619         log_message('err' => $message) if $config{syslog};
 620         if (defined $cleaner) {
 621                 $cleaner->();
 622         }
 623         die $message."\n";
 624 }
 625
 626 sub debug ($) {
 627         return unless $config{verbose};
 628         return log_message(debug => @_);
 629 }
 630
 631 my $log_open=0;
 632 sub log_message ($$) {
 633         my $type=shift;
 634
 635         if ($config{syslog}) {
 636                 require Sys::Syslog;
 637                 if (! $log_open) {
 638                         Sys::Syslog::setlogsock('unix');
 639                         Sys::Syslog::openlog('ikiwiki', '', 'user');
 640                         $log_open=1;
 641                 }
 642                 return eval {
 643                         Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
 644                 };
 645         }
 646         elsif (! $config{cgi}) {
 647                 return print "@_\n";
 648         }
 649         else {
 650                 return print STDERR "@_\n";
 651         }
 652 }
 653
 654 sub possibly_foolish_untaint ($) {
 655         my $tainted=shift;
 656         my ($untainted)=$tainted=~/(.*)/s;
 657         return $untainted;
 658 }
 659
 660 sub basename ($) {
 661         my $file=shift;
 662
 663         $file=~s!.*/+!!;
 664         return $file;
 665 }
 666
 667 sub dirname ($) {
 668         my $file=shift;
 669
 670         $file=~s!/*[^/]+$!!;
 671         return $file;
 672 }
 673
 674 sub isinternal ($) {
 675         my $page=shift;
 676         return exists $pagesources{$page} &&
 677                 $pagesources{$page} =~ /\._([^.]+)$/;
 678 }
 679
 680 sub pagetype ($) {
 681         my $file=shift;
 682
 683         if ($file =~ /\.([^.]+)$/) {
 684                 return $1 if exists $hooks{htmlize}{$1};
 685         }
 686         my $base=basename($file);
 687         if (exists $hooks{htmlize}{$base} &&
 688             $hooks{htmlize}{$base}{noextension}) {
 689                 return $base;
 690         }
 691         return;
 692 }
 693
 694 my %pagename_cache;
 695
 696 sub pagename ($) {
 697         my $file=shift;
 698
 699         if (exists $pagename_cache{$file}) {
 700                 return $pagename_cache{$file};
 701         }
 702
 703         my $type=pagetype($file);
 704         my $page=$file;
 705         $page=~s/\Q.$type\E*$//
 706                 if defined $type && !$hooks{htmlize}{$type}{keepextension}
 707                         && !$hooks{htmlize}{$type}{noextension};
 708         if ($config{indexpages} && $page=~/(.*)\/index$/) {
 709                 $page=$1;
 710         }
 711
 712         $pagename_cache{$file} = $page;
 713         return $page;
 714 }
 715
 716 sub newpagefile ($$) {
 717         my $page=shift;
 718         my $type=shift;
 719
 720         if (! $config{indexpages} || $page eq 'index') {
 721                 return $page.".".$type;
 722         }
 723         else {
 724                 return $page."/index.".$type;
 725         }
 726 }
 727
 728 sub targetpage ($$;$) {
 729         my $page=shift;
 730         my $ext=shift;
 731         my $filename=shift;
 732
 733         if (defined $filename) {
 734                 return $page."/".$filename.".".$ext;
 735         }
 736         elsif (! $config{usedirs} || $page eq 'index') {
 737                 return $page.".".$ext;
 738         }
 739         else {
 740                 return $page."/index.".$ext;
 741         }
 742 }
 743
 744 sub htmlpage ($) {
 745         my $page=shift;
 746
 747         return targetpage($page, $config{htmlext});
 748 }
 749
 750 sub srcfile_stat {
 751         my $file=shift;
 752         my $nothrow=shift;
 753
 754         return "$config{srcdir}/$file", stat(_) if -e "$config{srcdir}/$file";
 755         foreach my $dir (@{$config{underlaydirs}}, $config{underlaydir}) {
 756                 return "$dir/$file", stat(_) if -e "$dir/$file";
 757         }
 758         error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 759         return;
 760 }
 761
 762 sub srcfile ($;$) {
 763         return (srcfile_stat(@_))[0];
 764 }
 765
 766 sub add_underlay ($) {
 767         my $dir=shift;
 768
 769         if ($dir !~ /^\//) {
 770                 $dir="$config{underlaydirbase}/$dir";
 771         }
 772
 773         if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
 774                 unshift @{$config{underlaydirs}}, $dir;
 775         }
 776
 777         return 1;
 778 }
 779
 780 sub readfile ($;$$) {
 781         my $file=shift;
 782         my $binary=shift;
 783         my $wantfd=shift;
 784
 785         if (-l $file) {
 786                 error("cannot read a symlink ($file)");
 787         }
 788
 789         local $/=undef;
 790         open (my $in, "<", $file) || error("failed to read $file: $!");
 791         binmode($in) if ($binary);
 792         return \*$in if $wantfd;
 793         my $ret=<$in>;
 794         # check for invalid utf-8, and toss it back to avoid crashes
 795         if (! utf8::valid($ret)) {
 796                 $ret=encode_utf8($ret);
 797         }
 798         close $in || error("failed to read $file: $!");
 799         return $ret;
 800 }
 801
 802 sub prep_writefile ($$) {
 803         my $file=shift;
 804         my $destdir=shift;
 805
 806         my $test=$file;
 807         while (length $test) {
 808                 if (-l "$destdir/$test") {
 809                         error("cannot write to a symlink ($test)");
 810                 }
 811                 $test=dirname($test);
 812         }
 813
 814         my $dir=dirname("$destdir/$file");
 815         if (! -d $dir) {
 816                 my $d="";
 817                 foreach my $s (split(m!/+!, $dir)) {
 818                         $d.="$s/";
 819                         if (! -d $d) {
 820                                 mkdir($d) || error("failed to create directory $d: $!");
 821                         }
 822                 }
 823         }
 824
 825         return 1;
 826 }
 827
 828 sub writefile ($$$;$$) {
 829         my $file=shift; # can include subdirs
 830         my $destdir=shift; # directory to put file in
 831         my $content=shift;
 832         my $binary=shift;
 833         my $writer=shift;
 834
 835         prep_writefile($file, $destdir);
 836
 837         my $newfile="$destdir/$file.ikiwiki-new";
 838         if (-l $newfile) {
 839                 error("cannot write to a symlink ($newfile)");
 840         }
 841
 842         my $cleanup = sub { unlink($newfile) };
 843         open (my $out, '>', $newfile) || error("failed to write $newfile: $!", $cleanup);
 844         binmode($out) if ($binary);
 845         if ($writer) {
 846                 $writer->(\*$out, $cleanup);
 847         }
 848         else {
 849                 print $out $content or error("failed writing to $newfile: $!", $cleanup);
 850         }
 851         close $out || error("failed saving $newfile: $!", $cleanup);
 852         rename($newfile, "$destdir/$file") ||
 853                 error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 854
 855         return 1;
 856 }
 857
 858 my %cleared;
 859 sub will_render ($$;$) {
 860         my $page=shift;
 861         my $dest=shift;
 862         my $clear=shift;
 863
 864         # Important security check.
 865         if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
 866             ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}}, @{$wikistate{editpage}{previews}})) {
 867                 error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 868         }
 869
 870         if (! $clear || $cleared{$page}) {
 871                 $renderedfiles{$page}=[$dest, grep { $_ ne $dest } @{$renderedfiles{$page}}];
 872         }
 873         else {
 874                 foreach my $old (@{$renderedfiles{$page}}) {
 875                         delete $destsources{$old};
 876                 }
 877                 $renderedfiles{$page}=[$dest];
 878                 $cleared{$page}=1;
 879         }
 880         $destsources{$dest}=$page;
 881
 882         return 1;
 883 }
 884
 885 sub bestlink ($$) {
 886         my $page=shift;
 887         my $link=shift;
 888
 889         my $cwd=$page;
 890         if ($link=~s/^\/+//) {
 891                 # absolute links
 892                 $cwd="";
 893         }
 894         $link=~s/\/$//;
 895
 896         do {
 897                 my $l=$cwd;
 898                 $l.="/" if length $l;
 899                 $l.=$link;
 900
 901                 if (exists $pagesources{$l}) {
 902                         return $l;
 903                 }
 904                 elsif (exists $pagecase{lc $l}) {
 905                         return $pagecase{lc $l};
 906                 }
 907         } while $cwd=~s{/?[^/]+$}{};
 908
 909         if (length $config{userdir}) {
 910                 my $l = "$config{userdir}/".lc($link);
 911                 if (exists $pagesources{$l}) {
 912                         return $l;
 913                 }
 914                 elsif (exists $pagecase{lc $l}) {
 915                         return $pagecase{lc $l};
 916                 }
 917         }
 918
 919         #print STDERR "warning: page $page, broken link: $link\n";
 920         return "";
 921 }
 922
 923 sub isinlinableimage ($) {
 924         my $file=shift;
 925
 926         return $file =~ /\.(png|gif|jpg|jpeg)$/i;
 927 }
 928
 929 sub pagetitle ($;$) {
 930         my $page=shift;
 931         my $unescaped=shift;
 932
 933         if ($unescaped) {
 934                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : chr($2)/eg;
 935         }
 936         else {
 937                 $page=~s/(__(\d+)__|_)/$1 eq '_' ? ' ' : "&#$2;"/eg;
 938         }
 939
 940         return $page;
 941 }
 942
 943 sub titlepage ($) {
 944         my $title=shift;
 945         # support use w/o %config set
 946         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 947         $title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 948         return $title;
 949 }
 950
 951 sub linkpage ($) {
 952         my $link=shift;
 953         my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
 954         $link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 955         return $link;
 956 }
 957
 958 sub cgiurl (@) {
 959         my %params=@_;
 960
 961         my $cgiurl=$config{cgiurl};
 962         if (exists $params{cgiurl}) {
 963                 $cgiurl=$params{cgiurl};
 964                 delete $params{cgiurl};
 965         }
 966         return $cgiurl."?".
 967                 join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 968 }
 969
 970 sub baseurl (;$) {
 971         my $page=shift;
 972
 973         return "$config{url}/" if ! defined $page;
 974
 975         $page=htmlpage($page);
 976         $page=~s/[^\/]+$//;
 977         $page=~s/[^\/]+\//..\//g;
 978         return $page;
 979 }
 980
 981 sub abs2rel ($$) {
 982         # Work around very innefficient behavior in File::Spec if abs2rel
 983         # is passed two relative paths. It's much faster if paths are
 984         # absolute! (Debian bug #376658; fixed in debian unstable now)
 985         my $path="/".shift;
 986         my $base="/".shift;
 987
 988         require File::Spec;
 989         my $ret=File::Spec->abs2rel($path, $base);
 990         $ret=~s/^// if defined $ret;
 991         return $ret;
 992 }
 993
 994 sub displaytime ($;$) {
 995         # Plugins can override this function to mark up the time to
 996         # display.
 997         return '<span class="date">'.formattime(@_).'</span>';
 998 }
 999
1000 sub formattime ($;$) {
1001         # Plugins can override this function to format the time.
1002         my $time=shift;
1003         my $format=shift;
1004         if (! defined $format) {
1005                 $format=$config{timeformat};
1006         }
1007
1008         # strftime doesn't know about encodings, so make sure
1009         # its output is properly treated as utf8
1010         return decode_utf8(POSIX::strftime($format, localtime($time)));
1011 }
1012
1013 sub beautify_urlpath ($) {
1014         my $url=shift;
1015
1016         # Ensure url is not an empty link, and if necessary,
1017         # add ./ to avoid colon confusion.
1018         if ($url !~ /^\// && $url !~ /^\.\.?\//) {
1019                 $url="./$url";
1020         }
1021
1022         if ($config{usedirs}) {
1023                 $url =~ s!/index.$config{htmlext}$!/!;
1024         }
1025
1026         return $url;
1027 }
1028
1029 sub urlto ($$;$) {
1030         my $to=shift;
1031         my $from=shift;
1032         my $absolute=shift;
1033
1034         if (! length $to) {
1035                 return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
1036         }
1037
1038         if (! $destsources{$to}) {
1039                 $to=htmlpage($to);
1040         }
1041
1042         if ($absolute) {
1043                 return $config{url}.beautify_urlpath("/".$to);
1044         }
1045
1046         my $link = abs2rel($to, dirname(htmlpage($from)));
1047
1048         return beautify_urlpath($link);
1049 }
1050
1051 sub htmllink ($$$;@) {
1052         my $lpage=shift; # the page doing the linking
1053         my $page=shift; # the page that will contain the link (different for inline)
1054         my $link=shift;
1055         my %opts=@_;
1056
1057         $link=~s/\/$//;
1058
1059         my $bestlink;
1060         if (! $opts{forcesubpage}) {
1061                 $bestlink=bestlink($lpage, $link);
1062         }
1063         else {
1064                 $bestlink="$lpage/".lc($link);
1065         }
1066
1067         my $linktext;
1068         if (defined $opts{linktext}) {
1069                 $linktext=$opts{linktext};
1070         }
1071         else {
1072                 $linktext=pagetitle(basename($link));
1073         }
1074
1075         return "<span class=\"selflink\">$linktext</span>"
1076                 if length $bestlink && $page eq $bestlink &&
1077                    ! defined $opts{anchor};
1078
1079         if (! $destsources{$bestlink}) {
1080                 $bestlink=htmlpage($bestlink);
1081
1082                 if (! $destsources{$bestlink}) {
1083                         my $cgilink = "";
1084                         if (length $config{cgiurl}) {
1085                                 $cgilink = "<a href=\"".
1086                                         cgiurl(
1087                                                 do => "create",
1088                                                 page => lc($link),
1089                                                 from => $lpage
1090                                         )."\" rel=\"nofollow\">?</a>";
1091                         }
1092                         return "<span class=\"createlink\">$cgilink$linktext</span>"
1093                 }
1094         }
1095
1096         $bestlink=abs2rel($bestlink, dirname(htmlpage($page)));
1097         $bestlink=beautify_urlpath($bestlink);
1098
1099         if (! $opts{noimageinline} && isinlinableimage($bestlink)) {
1100                 return "<img src=\"$bestlink\" alt=\"$linktext\" />";
1101         }
1102
1103         if (defined $opts{anchor}) {
1104                 $bestlink.="#".$opts{anchor};
1105         }
1106
1107         my @attrs;
1108         foreach my $attr (qw{rel class title}) {
1109                 if (defined $opts{$attr}) {
1110                         push @attrs, " $attr=\"$opts{$attr}\"";
1111                 }
1112         }
1113
1114         return "<a href=\"$bestlink\"@attrs>$linktext</a>";
1115 }
1116
1117 sub userpage ($) {
1118         my $user=shift;
1119         return length $config{userdir} ? "$config{userdir}/$user" : $user;
1120 }
1121
1122 sub openiduser ($) {
1123         my $user=shift;
1124
1125         if ($user =~ m!^https?://! &&
1126             eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
1127                 my $display;
1128
1129                 if (Net::OpenID::VerifiedIdentity->can("DisplayOfURL")) {
1130                         $display = Net::OpenID::VerifiedIdentity::DisplayOfURL($user);
1131                 }
1132                 else {
1133                         # backcompat with old version
1134                         my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
1135                         $display=$oid->display;
1136                 }
1137
1138                 # Convert "user.somehost.com" to "user [somehost.com]"
1139                 # (also "user.somehost.co.uk")
1140                 if ($display !~ /\[/) {
1141                         $display=~s/^([-a-zA-Z0-9]+?)\.([-.a-zA-Z0-9]+\.[a-z]+)$/$1 [$2]/;
1142                 }
1143                 # Convert "http://somehost.com/user" to "user [somehost.com]".
1144                 # (also "https://somehost.com/user/")
1145                 if ($display !~ /\[/) {
1146                         $display=~s/^https?:\/\/(.+)\/([^\/#?]+)\/?(?:[#?].*)?$/$2 [$1]/;
1147                 }
1148                 $display=~s!^https?://!!; # make sure this is removed
1149                 eval q{use CGI 'escapeHTML'};
1150                 error($@) if $@;
1151                 return escapeHTML($display);
1152         }
1153         return;
1154 }
1155
1156 sub htmlize ($$$$) {
1157         my $page=shift;
1158         my $destpage=shift;
1159         my $type=shift;
1160         my $content=shift;
1161
1162         my $oneline = $content !~ /\n/;
1163
1164         if (exists $hooks{htmlize}{$type}) {
1165                 $content=$hooks{htmlize}{$type}{call}->(
1166                         page => $page,
1167                         content => $content,
1168                 );
1169         }
1170         else {
1171                 error("htmlization of $type not supported");
1172         }
1173
1174         run_hooks(sanitize => sub {
1175                 $content=shift->(
1176                         page => $page,
1177                         destpage => $destpage,
1178                         content => $content,
1179                 );
1180         });
1181
1182         if ($oneline) {
1183                 # hack to get rid of enclosing junk added by markdown
1184                 # and other htmlizers/sanitizers
1185                 $content=~s/^<p>//i;
1186                 $content=~s/<\/p>\n*$//i;
1187         }
1188
1189         return $content;
1190 }
1191
1192 sub linkify ($$$) {
1193         my $page=shift;
1194         my $destpage=shift;
1195         my $content=shift;
1196
1197         run_hooks(linkify => sub {
1198                 $content=shift->(
1199                         page => $page,
1200                         destpage => $destpage,
1201                         content => $content,
1202                 );
1203         });
1204
1205         return $content;
1206 }
1207
1208 our %preprocessing;
1209 our $preprocess_preview=0;
1210 sub preprocess ($$$;$$) {
1211         my $page=shift; # the page the data comes from
1212         my $destpage=shift; # the page the data will appear in (different for inline)
1213         my $content=shift;
1214         my $scan=shift;
1215         my $preview=shift;
1216
1217         # Using local because it needs to be set within any nested calls
1218         # of this function.
1219         local $preprocess_preview=$preview if defined $preview;
1220
1221         my $handle=sub {
1222                 my $escape=shift;
1223                 my $prefix=shift;
1224                 my $command=shift;
1225                 my $params=shift;
1226                 $params="" if ! defined $params;
1227
1228                 if (length $escape) {
1229                         return "[[$prefix$command $params]]";
1230                 }
1231                 elsif (exists $hooks{preprocess}{$command}) {
1232                         return "" if $scan && ! $hooks{preprocess}{$command}{scan};
1233                         # Note: preserve order of params, some plugins may
1234                         # consider it significant.
1235                         my @params;
1236                         while ($params =~ m{
1237                                 (?:([-\w]+)=)?          # 1: named parameter key?
1238                                 (?:
1239                                         """(.*?)"""     # 2: triple-quoted value
1240                                 |
1241                                         "([^"]*?)"      # 3: single-quoted value
1242                                 |
1243                                         (\S+)           # 4: unquoted value
1244                                 )
1245                                 (?:\s+|$)               # delimiter to next param
1246                         }sgx) {
1247                                 my $key=$1;
1248                                 my $val;
1249                                 if (defined $2) {
1250                                         $val=$2;
1251                                         $val=~s/\r\n/\n/mg;
1252                                         $val=~s/^\n+//g;
1253                                         $val=~s/\n+$//g;
1254                                 }
1255                                 elsif (defined $3) {
1256                                         $val=$3;
1257                                 }
1258                                 elsif (defined $4) {
1259                                         $val=$4;
1260                                 }
1261
1262                                 if (defined $key) {
1263                                         push @params, $key, $val;
1264                                 }
1265                                 else {
1266                                         push @params, $val, '';
1267                                 }
1268                         }
1269                         if ($preprocessing{$page}++ > 3) {
1270                                 # Avoid loops of preprocessed pages preprocessing
1271                                 # other pages that preprocess them, etc.
1272                                 return "[[!$command <span class=\"error\">".
1273                                         sprintf(gettext("preprocessing loop detected on %s at depth %i"),
1274                                                 $page, $preprocessing{$page}).
1275                                         "</span>]]";
1276                         }
1277                         my $ret;
1278                         if (! $scan) {
1279                                 $ret=eval {
1280                                         $hooks{preprocess}{$command}{call}->(
1281                                                 @params,
1282                                                 page => $page,
1283                                                 destpage => $destpage,
1284                                                 preview => $preprocess_preview,
1285                                         );
1286                                 };
1287                                 if ($@) {
1288                                         my $error=$@;
1289                                         chomp $error;
1290                                         $ret="[[!$command <span class=\"error\">".
1291                                                 gettext("Error").": $error"."</span>]]";
1292                                 }
1293                         }
1294                         else {
1295                                 # use void context during scan pass
1296                                 eval {
1297                                         $hooks{preprocess}{$command}{call}->(
1298                                                 @params,
1299                                                 page => $page,
1300                                                 destpage => $destpage,
1301                                                 preview => $preprocess_preview,
1302                                         );
1303                                 };
1304                                 $ret="";
1305                         }
1306                         $preprocessing{$page}--;
1307                         return $ret;
1308                 }
1309                 else {
1310                         return "[[$prefix$command $params]]";
1311                 }
1312         };
1313
1314         my $regex;
1315         if ($config{prefix_directives}) {
1316                 $regex = qr{
1317                         (\\?)           # 1: escape?
1318                         \[\[(!)         # directive open; 2: prefix
1319                         ([-\w]+)        # 3: command
1320                         (               # 4: the parameters..
1321                                 \s+     # Must have space if parameters present
1322                                 (?:
1323                                         (?:[-\w]+=)?            # named parameter key?
1324                                         (?:
1325                                                 """.*?"""       # triple-quoted value
1326                                                 |
1327                                                 "[^"]*?"        # single-quoted value
1328                                                 |
1329                                                 [^"\s\]]+       # unquoted value
1330                                         )
1331                                         \s*                     # whitespace or end
1332                                                                 # of directive
1333                                 )
1334                         *)?             # 0 or more parameters
1335                         \]\]            # directive closed
1336                 }sx;
1337         }
1338         else {
1339                 $regex = qr{
1340                         (\\?)           # 1: escape?
1341                         \[\[(!?)        # directive open; 2: optional prefix
1342                         ([-\w]+)        # 3: command
1343                         \s+
1344                         (               # 4: the parameters..
1345                                 (?:
1346                                         (?:[-\w]+=)?            # named parameter key?
1347                                         (?:
1348                                                 """.*?"""       # triple-quoted value
1349                                                 |
1350                                                 "[^"]*?"        # single-quoted value
1351                                                 |
1352                                                 [^"\s\]]+       # unquoted value
1353                                         )
1354                                         \s*                     # whitespace or end
1355                                                                 # of directive
1356                                 )
1357                         *)              # 0 or more parameters
1358                         \]\]            # directive closed
1359                 }sx;
1360         }
1361
1362         $content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
1363         return $content;
1364 }
1365
1366 sub filter ($$$) {
1367         my $page=shift;
1368         my $destpage=shift;
1369         my $content=shift;
1370
1371         run_hooks(filter => sub {
1372                 $content=shift->(page => $page, destpage => $destpage,
1373                         content => $content);
1374         });
1375
1376         return $content;
1377 }
1378
1379 sub indexlink () {
1380         return "<a href=\"$config{url}\">$config{wikiname}</a>";
1381 }
1382
1383 sub check_canedit ($$$;$) {
1384         my $page=shift;
1385         my $q=shift;
1386         my $session=shift;
1387         my $nonfatal=shift;
1388
1389         my $canedit;
1390         run_hooks(canedit => sub {
1391                 return if defined $canedit;
1392                 my $ret=shift->($page, $q, $session);
1393                 if (defined $ret) {
1394                         if ($ret eq "") {
1395                                 $canedit=1;
1396                         }
1397                         elsif (ref $ret eq 'CODE') {
1398                                 $ret->() unless $nonfatal;
1399                                 $canedit=0;
1400                         }
1401                         elsif (defined $ret) {
1402                                 error($ret) unless $nonfatal;
1403                                 $canedit=0;
1404                         }
1405                 }
1406         });
1407         return defined $canedit ? $canedit : 1;
1408 }
1409
1410 sub check_content (@) {
1411         my %params=@_;
1412
1413         return 1 if ! exists $hooks{checkcontent}; # optimisation
1414
1415         if (exists $pagesources{$params{page}}) {
1416                 my @diff;
1417                 my %old=map { $_ => 1 }
1418                         split("\n", readfile(srcfile($pagesources{$params{page}})));
1419                 foreach my $line (split("\n", $params{content})) {
1420                         push @diff, $line if ! exists $old{$line};
1421                 }
1422                 $params{diff}=join("\n", @diff);
1423         }
1424
1425         my $ok;
1426         run_hooks(checkcontent => sub {
1427                 return if defined $ok;
1428                 my $ret=shift->(%params);
1429                 if (defined $ret) {
1430                         if ($ret eq "") {
1431                                 $ok=1;
1432                         }
1433                         elsif (ref $ret eq 'CODE') {
1434                                 $ret->() unless $params{nonfatal};
1435                                 $ok=0;
1436                         }
1437                         elsif (defined $ret) {
1438                                 error($ret) unless $params{nonfatal};
1439                                 $ok=0;
1440                         }
1441                 }
1442
1443         });
1444         return defined $ok ? $ok : 1;
1445 }
1446
1447 my $wikilock;
1448
1449 sub lockwiki () {
1450         # Take an exclusive lock on the wiki to prevent multiple concurrent
1451         # run issues. The lock will be dropped on program exit.
1452         if (! -d $config{wikistatedir}) {
1453                 mkdir($config{wikistatedir});
1454         }
1455         open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
1456                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
1457         if (! flock($wikilock, 2)) { # LOCK_EX
1458                 error("failed to get lock");
1459         }
1460         return 1;
1461 }
1462
1463 sub unlockwiki () {
1464         POSIX::close($ENV{IKIWIKI_CGILOCK_FD}) if exists $ENV{IKIWIKI_CGILOCK_FD};
1465         return close($wikilock) if $wikilock;
1466         return;
1467 }
1468
1469 my $commitlock;
1470
1471 sub commit_hook_enabled () {
1472         open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
1473                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1474         if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
1475                 close($commitlock) || error("failed closing commitlock: $!");
1476                 return 0;
1477         }
1478         close($commitlock) || error("failed closing commitlock: $!");
1479         return 1;
1480 }
1481
1482 sub disable_commit_hook () {
1483         open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
1484                 error("cannot write to $config{wikistatedir}/commitlock: $!");
1485         if (! flock($commitlock, 2)) { # LOCK_EX
1486                 error("failed to get commit lock");
1487         }
1488         return 1;
1489 }
1490
1491 sub enable_commit_hook () {
1492         return close($commitlock) if $commitlock;
1493         return;
1494 }
1495
1496 sub loadindex () {
1497         %oldrenderedfiles=%pagectime=();
1498         if (! $config{rebuild}) {
1499                 %pagesources=%pagemtime=%oldlinks=%links=%depends=
1500                 %destsources=%renderedfiles=%pagecase=%pagestate=
1501                 %depends_simple=%typedlinks=%oldtypedlinks=();
1502         }
1503         my $in;
1504         if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
1505                 if (-e "$config{wikistatedir}/index") {
1506                         system("ikiwiki-transition", "indexdb", $config{srcdir});
1507                         open ($in, "<", "$config{wikistatedir}/indexdb") || return;
1508                 }
1509                 else {
1510                         $config{gettime}=1; # first build
1511                         return;
1512                 }
1513         }
1514
1515         my $index=Storable::fd_retrieve($in);
1516         if (! defined $index) {
1517                 return 0;
1518         }
1519
1520         my $pages;
1521         if (exists $index->{version} && ! ref $index->{version}) {
1522                 $pages=$index->{page};
1523                 %wikistate=%{$index->{state}};
1524         }
1525         else {
1526                 $pages=$index;
1527                 %wikistate=();
1528         }
1529
1530         foreach my $src (keys %$pages) {
1531                 my $d=$pages->{$src};
1532                 my $page=pagename($src);
1533                 $pagectime{$page}=$d->{ctime};
1534                 if (! $config{rebuild}) {
1535                         $pagesources{$page}=$src;
1536                         $pagemtime{$page}=$d->{mtime};
1537                         $renderedfiles{$page}=$d->{dest};
1538                         if (exists $d->{links} && ref $d->{links}) {
1539                                 $links{$page}=$d->{links};
1540                                 $oldlinks{$page}=[@{$d->{links}}];
1541                         }
1542                         if (ref $d->{depends_simple} eq 'ARRAY') {
1543                                 # old format
1544                                 $depends_simple{$page}={
1545                                         map { $_ => 1 } @{$d->{depends_simple}}
1546                                 };
1547                         }
1548                         elsif (exists $d->{depends_simple}) {
1549                                 $depends_simple{$page}=$d->{depends_simple};
1550                         }
1551                         if (exists $d->{dependslist}) {
1552                                 # old format
1553                                 $depends{$page}={
1554                                         map { $_ => $DEPEND_CONTENT }
1555                                                 @{$d->{dependslist}}
1556                                 };
1557                         }
1558                         elsif (exists $d->{depends} && ! ref $d->{depends}) {
1559                                 # old format
1560                                 $depends{$page}={$d->{depends} => $DEPEND_CONTENT };
1561                         }
1562                         elsif (exists $d->{depends}) {
1563                                 $depends{$page}=$d->{depends};
1564                         }
1565                         if (exists $d->{state}) {
1566                                 $pagestate{$page}=$d->{state};
1567                         }
1568                         if (exists $d->{typedlinks}) {
1569                                 $typedlinks{$page}=$d->{typedlinks};
1570
1571                                 while (my ($type, $links) = each %{$typedlinks{$page}}) {
1572                                         next unless %$links;
1573                                         $oldtypedlinks{$page}{$type} = {%$links};
1574                                 }
1575                         }
1576                 }
1577                 $oldrenderedfiles{$page}=[@{$d->{dest}}];
1578         }
1579         foreach my $page (keys %pagesources) {
1580                 $pagecase{lc $page}=$page;
1581         }
1582         foreach my $page (keys %renderedfiles) {
1583                 $destsources{$_}=$page foreach @{$renderedfiles{$page}};
1584         }
1585         return close($in);
1586 }
1587
1588 sub saveindex () {
1589         run_hooks(savestate => sub { shift->() });
1590
1591         my %hookids;
1592         foreach my $type (keys %hooks) {
1593                 $hookids{$_}=1 foreach keys %{$hooks{$type}};
1594         }
1595         my @hookids=keys %hookids;
1596
1597         if (! -d $config{wikistatedir}) {
1598                 mkdir($config{wikistatedir});
1599         }
1600         my $newfile="$config{wikistatedir}/indexdb.new";
1601         my $cleanup = sub { unlink($newfile) };
1602         open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
1603
1604         my %index;
1605         foreach my $page (keys %pagemtime) {
1606                 next unless $pagemtime{$page};
1607                 my $src=$pagesources{$page};
1608
1609                 $index{page}{$src}={
1610                         ctime => $pagectime{$page},
1611                         mtime => $pagemtime{$page},
1612                         dest => $renderedfiles{$page},
1613                         links => $links{$page},
1614                 };
1615
1616                 if (exists $depends{$page}) {
1617                         $index{page}{$src}{depends} = $depends{$page};
1618                 }
1619
1620                 if (exists $depends_simple{$page}) {
1621                         $index{page}{$src}{depends_simple} = $depends_simple{$page};
1622                 }
1623
1624                 if (exists $typedlinks{$page} && %{$typedlinks{$page}}) {
1625                         $index{page}{$src}{typedlinks} = $typedlinks{$page};
1626                 }
1627
1628                 if (exists $pagestate{$page}) {
1629                         foreach my $id (@hookids) {
1630                                 foreach my $key (keys %{$pagestate{$page}{$id}}) {
1631                                         $index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
1632                                 }
1633                         }
1634                 }
1635         }
1636
1637         $index{state}={};
1638         foreach my $id (@hookids) {
1639                 foreach my $key (keys %{$wikistate{$id}}) {
1640                         $index{state}{$id}{$key}=$wikistate{$id}{$key};
1641                 }
1642         }
1643
1644         $index{version}="3";
1645         my $ret=Storable::nstore_fd(\%index, $out);
1646         return if ! defined $ret || ! $ret;
1647         close $out || error("failed saving to $newfile: $!", $cleanup);
1648         rename($newfile, "$config{wikistatedir}/indexdb") ||
1649                 error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
1650
1651         return 1;
1652 }
1653
1654 sub template_file ($) {
1655         my $template=shift;
1656
1657         foreach my $dir ($config{templatedir},
1658                          "$installdir/share/ikiwiki/templates") {
1659                 return "$dir/$template" if -e "$dir/$template";
1660         }
1661         return;
1662 }
1663
1664 sub template_params (@) {
1665         my $filename=template_file(shift);
1666
1667         if (! defined $filename) {
1668                 return if wantarray;
1669                 return "";
1670         }
1671
1672         my @ret=(
1673                 filter => sub {
1674                         my $text_ref = shift;
1675                         ${$text_ref} = decode_utf8(${$text_ref});
1676                 },
1677                 filename => $filename,
1678                 loop_context_vars => 1,
1679                 die_on_bad_params => 0,
1680                 @_
1681         );
1682         return wantarray ? @ret : {@ret};
1683 }
1684
1685 sub template ($;@) {
1686         require HTML::Template;
1687         return HTML::Template->new(template_params(@_));
1688 }
1689
1690 sub misctemplate ($$;@) {
1691         my $title=shift;
1692         my $pagebody=shift;
1693
1694         my $template=template("misc.tmpl");
1695         $template->param(
1696                 title => $title,
1697                 indexlink => indexlink(),
1698                 wikiname => $config{wikiname},
1699                 pagebody => $pagebody,
1700                 baseurl => baseurl(),
1701                 @_,
1702         );
1703         run_hooks(pagetemplate => sub {
1704                 shift->(page => "", destpage => "", template => $template);
1705         });
1706         return $template->output;
1707 }
1708
1709 sub hook (@) {
1710         my %param=@_;
1711
1712         if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
1713                 error 'hook requires type, call, and id parameters';
1714         }
1715
1716         return if $param{no_override} && exists $hooks{$param{type}}{$param{id}};
1717
1718         $hooks{$param{type}}{$param{id}}=\%param;
1719         return 1;
1720 }
1721
1722 sub run_hooks ($$) {
1723         # Calls the given sub for each hook of the given type,
1724         # passing it the hook function to call.
1725         my $type=shift;
1726         my $sub=shift;
1727
1728         if (exists $hooks{$type}) {
1729                 my (@first, @middle, @last);
1730                 foreach my $id (keys %{$hooks{$type}}) {
1731                         if ($hooks{$type}{$id}{first}) {
1732                                 push @first, $id;
1733                         }
1734                         elsif ($hooks{$type}{$id}{last}) {
1735                                 push @last, $id;
1736                         }
1737                         else {
1738                                 push @middle, $id;
1739                         }
1740                 }
1741                 foreach my $id (@first, @middle, @last) {
1742                         $sub->($hooks{$type}{$id}{call});
1743                 }
1744         }
1745
1746         return 1;
1747 }
1748
1749 sub rcs_update () {
1750         $hooks{rcs}{rcs_update}{call}->(@_);
1751 }
1752
1753 sub rcs_prepedit ($) {
1754         $hooks{rcs}{rcs_prepedit}{call}->(@_);
1755 }
1756
1757 sub rcs_commit ($$$;$$) {
1758         $hooks{rcs}{rcs_commit}{call}->(@_);
1759 }
1760
1761 sub rcs_commit_staged ($$$) {
1762         $hooks{rcs}{rcs_commit_staged}{call}->(@_);
1763 }
1764
1765 sub rcs_add ($) {
1766         $hooks{rcs}{rcs_add}{call}->(@_);
1767 }
1768
1769 sub rcs_remove ($) {
1770         $hooks{rcs}{rcs_remove}{call}->(@_);
1771 }
1772
1773 sub rcs_rename ($$) {
1774         $hooks{rcs}{rcs_rename}{call}->(@_);
1775 }
1776
1777 sub rcs_recentchanges ($) {
1778         $hooks{rcs}{rcs_recentchanges}{call}->(@_);
1779 }
1780
1781 sub rcs_diff ($) {
1782         $hooks{rcs}{rcs_diff}{call}->(@_);
1783 }
1784
1785 sub rcs_getctime ($) {
1786         $hooks{rcs}{rcs_getctime}{call}->(@_);
1787 }
1788
1789 sub rcs_getmtime ($) {
1790         $hooks{rcs}{rcs_getmtime}{call}->(@_);
1791 }
1792
1793 sub rcs_receive () {
1794         $hooks{rcs}{rcs_receive}{call}->();
1795 }
1796
1797 sub add_depends ($$;$) {
1798         my $page=shift;
1799         my $pagespec=shift;
1800         my $deptype=shift || $DEPEND_CONTENT;
1801
1802         # Is the pagespec a simple page name?
1803         if ($pagespec =~ /$config{wiki_file_regexp}/ &&
1804             $pagespec !~ /[\s*?()!]/) {
1805                 $depends_simple{$page}{lc $pagespec} |= $deptype;
1806                 return 1;
1807         }
1808
1809         # Add explicit dependencies for influences.
1810         my $sub=pagespec_translate($pagespec);
1811         return unless defined $sub;
1812         foreach my $p (keys %pagesources) {
1813                 my $r=$sub->($p, location => $page);
1814                 my $i=$r->influences;
1815                 my $static=$r->influences_static;
1816                 foreach my $k (keys %$i) {
1817                         next unless $r || $static || $k eq $page;
1818                         $depends_simple{$page}{lc $k} |= $i->{$k};
1819                 }
1820                 last if $static;
1821         }
1822
1823         $depends{$page}{$pagespec} |= $deptype;
1824         return 1;
1825 }
1826
1827 sub deptype (@) {
1828         my $deptype=0;
1829         foreach my $type (@_) {
1830                 if ($type eq 'presence') {
1831                         $deptype |= $DEPEND_PRESENCE;
1832                 }
1833                 elsif ($type eq 'links') {
1834                         $deptype |= $DEPEND_LINKS;
1835                 }
1836                 elsif ($type eq 'content') {
1837                         $deptype |= $DEPEND_CONTENT;
1838                 }
1839         }
1840         return $deptype;
1841 }
1842
1843 my $file_prune_regexp;
1844 sub file_pruned ($) {
1845         my $file=shift;
1846
1847         if (defined $config{include} && length $config{include}) {
1848                 return 0 if $file =~ m/$config{include}/;
1849         }
1850
1851         if (! defined $file_prune_regexp) {
1852                 $file_prune_regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
1853                 $file_prune_regexp=qr/$file_prune_regexp/;
1854         }
1855         return $file =~ m/$file_prune_regexp/;
1856 }
1857
1858 sub define_gettext () {
1859         # If translation is needed, redefine the gettext function to do it.
1860         # Otherwise, it becomes a quick no-op.
1861         my $gettext_obj;
1862         my $getobj;
1863         if ((exists $ENV{LANG} && length $ENV{LANG}) ||
1864             (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
1865             (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
1866                 $getobj=sub {
1867                         $gettext_obj=eval q{
1868                                 use Locale::gettext q{textdomain};
1869                                 Locale::gettext->domain('ikiwiki')
1870                         };
1871                 };
1872         }
1873
1874         no warnings 'redefine';
1875         *gettext=sub {
1876                 $getobj->() if $getobj;
1877                 if ($gettext_obj) {
1878                         $gettext_obj->get(shift);
1879                 }
1880                 else {
1881                         return shift;
1882                 }
1883         };
1884         *ngettext=sub {
1885                 $getobj->() if $getobj;
1886                 if ($gettext_obj) {
1887                         $gettext_obj->nget(@_);
1888                 }
1889                 else {
1890                         return ($_[2] == 1 ? $_[0] : $_[1])
1891                 }
1892         };
1893 }
1894
1895 sub gettext {
1896         define_gettext();
1897         gettext(@_);
1898 }
1899
1900 sub ngettext {
1901         define_gettext();
1902         ngettext(@_);
1903 }
1904
1905 sub yesno ($) {
1906         my $val=shift;
1907
1908         return (defined $val && (lc($val) eq gettext("yes") || lc($val) eq "yes" || $val eq "1"));
1909 }
1910
1911 sub inject {
1912         # Injects a new function into the symbol table to replace an
1913         # exported function.
1914         my %params=@_;
1915
1916         # This is deep ugly perl foo, beware.
1917         no strict;
1918         no warnings;
1919         if (! defined $params{parent}) {
1920                 $params{parent}='::';
1921                 $params{old}=\&{$params{name}};
1922                 $params{name}=~s/.*:://;
1923         }
1924         my $parent=$params{parent};
1925         foreach my $ns (grep /^\w+::/, keys %{$parent}) {
1926                 $ns = $params{parent} . $ns;
1927                 inject(%params, parent => $ns) unless $ns eq '::main::';
1928                 *{$ns . $params{name}} = $params{call}
1929                         if exists ${$ns}{$params{name}} &&
1930                            \&{${$ns}{$params{name}}} == $params{old};
1931         }
1932         use strict;
1933         use warnings;
1934 }
1935
1936 sub add_link ($$;$) {
1937         my $page=shift;
1938         my $link=shift;
1939         my $type=shift;
1940
1941         push @{$links{$page}}, $link
1942                 unless grep { $_ eq $link } @{$links{$page}};
1943
1944         if (defined $type) {
1945                 $typedlinks{$page}{$type}{$link} = 1;
1946         }
1947 }
1948
1949 sub add_autofile ($$$) {
1950         my $file=shift;
1951         my $plugin=shift;
1952         my $generator=shift;
1953
1954         $autofiles{$file}{plugin}=$plugin;
1955         $autofiles{$file}{generator}=$generator;
1956 }
1957
1958 sub sortspec_translate ($$) {
1959         my $spec = shift;
1960         my $reverse = shift;
1961
1962         my $code = "";
1963         my @data;
1964         while ($spec =~ m{
1965                 \s*
1966                 (-?)            # group 1: perhaps negated
1967                 \s*
1968                 (               # group 2: a word
1969                         \w+\([^\)]*\)   # command(params)
1970                         |
1971                         [^\s]+          # or anything else
1972                 )
1973                 \s*
1974         }gx) {
1975                 my $negated = $1;
1976                 my $word = $2;
1977                 my $params = undef;
1978
1979                 if ($word =~ m/^(\w+)\((.*)\)$/) {
1980                         # command with parameters
1981                         $params = $2;
1982                         $word = $1;
1983                 }
1984                 elsif ($word !~ m/^\w+$/) {
1985                         error(sprintf(gettext("invalid sort type %s"), $word));
1986                 }
1987
1988                 if (length $code) {
1989                         $code .= " || ";
1990                 }
1991
1992                 if ($negated) {
1993                         $code .= "-";
1994                 }
1995
1996                 if (exists $IkiWiki::SortSpec::{"cmp_$word"}) {
1997                         if (defined $params) {
1998                                 push @data, $params;
1999                                 $code .= "IkiWiki::SortSpec::cmp_$word(\$data[$#data])";
2000                         }
2001                         else {
2002                                 $code .= "IkiWiki::SortSpec::cmp_$word(undef)";
2003                         }
2004                 }
2005                 else {
2006                         error(sprintf(gettext("unknown sort type %s"), $word));
2007                 }
2008         }
2009
2010         if (! length $code) {
2011                 # undefined sorting method... sort arbitrarily
2012                 return sub { 0 };
2013         }
2014
2015         if ($reverse) {
2016                 $code="-($code)";
2017         }
2018
2019         no warnings;
2020         return eval 'sub { '.$code.' }';
2021 }
2022
2023 sub pagespec_translate ($) {
2024         my $spec=shift;
2025
2026         # Convert spec to perl code.
2027         my $code="";
2028         my @data;
2029         while ($spec=~m{
2030                 \s*             # ignore whitespace
2031                 (               # 1: match a single word
2032                         \!              # !
2033                 |
2034                         \(              # (
2035                 |
2036                         \)              # )
2037                 |
2038                         \w+\([^\)]*\)   # command(params)
2039                 |
2040                         [^\s()]+        # any other text
2041                 )
2042                 \s*             # ignore whitespace
2043         }gx) {
2044                 my $word=$1;
2045                 if (lc $word eq 'and') {
2046                         $code.=' &';
2047                 }
2048                 elsif (lc $word eq 'or') {
2049                         $code.=' |';
2050                 }
2051                 elsif ($word eq "(" || $word eq ")" || $word eq "!") {
2052                         $code.=' '.$word;
2053                 }
2054                 elsif ($word =~ /^(\w+)\((.*)\)$/) {
2055                         if (exists $IkiWiki::PageSpec::{"match_$1"}) {
2056                                 push @data, $2;
2057                                 $code.="IkiWiki::PageSpec::match_$1(\$page, \$data[$#data], \@_)";
2058                         }
2059                         else {
2060                                 push @data, qq{unknown function in pagespec "$word"};
2061                                 $code.="IkiWiki::ErrorReason->new(\$data[$#data])";
2062                         }
2063                 }
2064                 else {
2065                         push @data, $word;
2066                         $code.=" IkiWiki::PageSpec::match_glob(\$page, \$data[$#data], \@_)";
2067                 }
2068         }
2069
2070         if (! length $code) {
2071                 $code="IkiWiki::FailReason->new('empty pagespec')";
2072         }
2073
2074         no warnings;
2075         return eval 'sub { my $page=shift; '.$code.' }';
2076 }
2077
2078 sub pagespec_match ($$;@) {
2079         my $page=shift;
2080         my $spec=shift;
2081         my @params=@_;
2082
2083         # Backwards compatability with old calling convention.
2084         if (@params == 1) {
2085                 unshift @params, 'location';
2086         }
2087
2088         my $sub=pagespec_translate($spec);
2089         return IkiWiki::ErrorReason->new("syntax error in pagespec \"$spec\"")
2090                 if ! defined $sub;
2091         return $sub->($page, @params);
2092 }
2093
2094 sub pagespec_match_list ($$;@) {
2095         my $page=shift;
2096         my $pagespec=shift;
2097         my %params=@_;
2098
2099         # Backwards compatability with old calling convention.
2100         if (ref $page) {
2101                 print STDERR "warning: a plugin (".caller().") is using pagespec_match_list in an obsolete way, and needs to be updated\n";
2102                 $params{list}=$page;
2103                 $page=$params{location}; # ugh!
2104         }
2105
2106         my $sub=pagespec_translate($pagespec);
2107         error "syntax error in pagespec \"$pagespec\""
2108                 if ! defined $sub;
2109         my $sort=sortspec_translate($params{sort}, $params{reverse})
2110                 if defined $params{sort};
2111
2112         my @candidates;
2113         if (exists $params{list}) {
2114                 @candidates=exists $params{filter}
2115                         ? grep { ! $params{filter}->($_) } @{$params{list}}
2116                         : @{$params{list}};
2117         }
2118         else {
2119                 @candidates=exists $params{filter}
2120                         ? grep { ! $params{filter}->($_) } keys %pagesources
2121                         : keys %pagesources;
2122         }
2123
2124         # clear params, remainder is passed to pagespec
2125         $depends{$page}{$pagespec} |= ($params{deptype} || $DEPEND_CONTENT);
2126         my $num=$params{num};
2127         delete @params{qw{num deptype reverse sort filter list}};
2128
2129         # when only the top matches will be returned, it's efficient to
2130         # sort before matching to pagespec,
2131         if (defined $num && defined $sort) {
2132                 @candidates=IkiWiki::SortSpec::sort_pages(
2133                         $sort, @candidates);
2134         }
2135
2136         my @matches;
2137         my $firstfail;
2138         my $count=0;
2139         my $accum=IkiWiki::SuccessReason->new();
2140         foreach my $p (@candidates) {
2141                 my $r=$sub->($p, %params, location => $page);
2142                 error(sprintf(gettext("cannot match pages: %s"), $r))
2143                         if $r->isa("IkiWiki::ErrorReason");
2144                 unless ($r || $r->influences_static) {
2145                         $r->remove_influence($p);
2146                 }
2147                 $accum |= $r;
2148                 if ($r) {
2149                         push @matches, $p;
2150                         last if defined $num && ++$count == $num;
2151                 }
2152         }
2153
2154         # Add simple dependencies for accumulated influences.
2155         my $i=$accum->influences;
2156         foreach my $k (keys %$i) {
2157                 $depends_simple{$page}{lc $k} |= $i->{$k};
2158         }
2159
2160         # when all matches will be returned, it's efficient to
2161         # sort after matching
2162         if (! defined $num && defined $sort) {
2163                 return IkiWiki::SortSpec::sort_pages(
2164                         $sort, @matches);
2165         }
2166         else {
2167                 return @matches;
2168         }
2169 }
2170
2171 sub pagespec_valid ($) {
2172         my $spec=shift;
2173
2174         return defined pagespec_translate($spec);
2175 }
2176
2177 sub glob2re ($) {
2178         my $re=quotemeta(shift);
2179         $re=~s/\\\*/.*/g;
2180         $re=~s/\\\?/./g;
2181         return $re;
2182 }
2183
2184 package IkiWiki::FailReason;
2185
2186 use overload (
2187         '""'    => sub { $_[0][0] },
2188         '0+'    => sub { 0 },
2189         '!'     => sub { bless $_[0], 'IkiWiki::SuccessReason'},
2190         '&'     => sub { $_[0]->merge_influences($_[1], 1); $_[0] },
2191         '|'     => sub { $_[1]->merge_influences($_[0]); $_[1] },
2192         fallback => 1,
2193 );
2194
2195 our @ISA = 'IkiWiki::SuccessReason';
2196
2197 package IkiWiki::SuccessReason;
2198
2199 use overload (
2200         '""'    => sub { $_[0][0] },
2201         '0+'    => sub { 1 },
2202         '!'     => sub { bless $_[0], 'IkiWiki::FailReason'},
2203         '&'     => sub { $_[1]->merge_influences($_[0], 1); $_[1] },
2204         '|'     => sub { $_[0]->merge_influences($_[1]); $_[0] },
2205         fallback => 1,
2206 );
2207
2208 sub new {
2209         my $class = shift;
2210         my $value = shift;
2211         return bless [$value, {@_}], $class;
2212 }
2213
2214 sub influences {
2215         my $this=shift;
2216         $this->[1]={@_} if @_;
2217         my %i=%{$this->[1]};
2218         delete $i{""};
2219         return \%i;
2220 }
2221
2222 sub influences_static {
2223         return ! $_[0][1]->{""};
2224 }
2225
2226 sub merge_influences {
2227         my $this=shift;
2228         my $other=shift;
2229         my $anded=shift;
2230
2231         if (! $anded || (($this || %{$this->[1]}) &&
2232                          ($other || %{$other->[1]}))) {
2233                 foreach my $influence (keys %{$other->[1]}) {
2234                         $this->[1]{$influence} |= $other->[1]{$influence};
2235                 }
2236         }
2237         else {
2238                 # influence blocker
2239                 $this->[1]={};
2240         }
2241 }
2242
2243 sub remove_influence {
2244         my $this=shift;
2245         my $torm=shift;
2246
2247         delete $this->[1]{$torm};
2248 }
2249
2250 package IkiWiki::ErrorReason;
2251
2252 our @ISA = 'IkiWiki::FailReason';
2253
2254 package IkiWiki::PageSpec;
2255
2256 sub derel ($$) {
2257         my $path=shift;
2258         my $from=shift;
2259
2260         if ($path =~ m!^\./!) {
2261                 $from=~s#/?[^/]+$## if defined $from;
2262                 $path=~s#^\./##;
2263                 $path="$from/$path" if defined $from && length $from;
2264         }
2265
2266         return $path;
2267 }
2268
2269 sub match_glob ($$;@) {
2270         my $page=shift;
2271         my $glob=shift;
2272         my %params=@_;
2273
2274         $glob=derel($glob, $params{location});
2275
2276         my $regexp=IkiWiki::glob2re($glob);
2277         if ($page=~/^$regexp$/i) {
2278                 if (! IkiWiki::isinternal($page) || $params{internal}) {
2279                         return IkiWiki::SuccessReason->new("$glob matches $page");
2280                 }
2281                 else {
2282                         return IkiWiki::FailReason->new("$glob matches $page, but the page is an internal page");
2283                 }
2284         }
2285         else {
2286                 return IkiWiki::FailReason->new("$glob does not match $page");
2287         }
2288 }
2289
2290 sub match_internal ($$;@) {
2291         return match_glob($_[0], $_[1], @_, internal => 1)
2292 }
2293
2294 sub match_link ($$;@) {
2295         my $page=shift;
2296         my $link=lc(shift);
2297         my %params=@_;
2298
2299         $link=derel($link, $params{location});
2300         my $from=exists $params{location} ? $params{location} : '';
2301         my $linktype=$params{linktype};
2302         my $qualifier='';
2303         if (defined $linktype) {
2304                 $qualifier=" with type $linktype";
2305         }
2306
2307         my $links = $IkiWiki::links{$page};
2308         return IkiWiki::FailReason->new("$page has no links", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2309                 unless $links && @{$links};
2310         my $bestlink = IkiWiki::bestlink($from, $link);
2311         foreach my $p (@{$links}) {
2312                 if (length $bestlink) {
2313                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p}) && $bestlink eq IkiWiki::bestlink($page, $p)) {
2314                                 return IkiWiki::SuccessReason->new("$page links to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2315                         }
2316                 }
2317                 else {
2318                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p}) && match_glob($p, $link, %params)) {
2319                                 return IkiWiki::SuccessReason->new("$page links to page $p$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2320                         }
2321                         my ($p_rel)=$p=~/^\/?(.*)/;
2322                         $link=~s/^\///;
2323                         if ((!defined $linktype || exists $IkiWiki::typedlinks{$page}{$linktype}{$p_rel}) && match_glob($p_rel, $link, %params)) {
2324                                 return IkiWiki::SuccessReason->new("$page links to page $p_rel$qualifier, matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
2325                         }
2326                 }
2327         }
2328         return IkiWiki::FailReason->new("$page does not link to $link$qualifier", $page => $IkiWiki::DEPEND_LINKS, "" => 1);
2329 }
2330
2331 sub match_backlink ($$;@) {
2332         my $ret=match_link($_[1], $_[0], @_);
2333         $ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
2334         return $ret;
2335 }
2336
2337 sub match_created_before ($$;@) {
2338         my $page=shift;
2339         my $testpage=shift;
2340         my %params=@_;
2341
2342         $testpage=derel($testpage, $params{location});
2343
2344         if (exists $IkiWiki::pagectime{$testpage}) {
2345                 if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
2346                         return IkiWiki::SuccessReason->new("$page created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2347                 }
2348                 else {
2349                         return IkiWiki::FailReason->new("$page not created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2350                 }
2351         }
2352         else {
2353                 return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
2354         }
2355 }
2356
2357 sub match_created_after ($$;@) {
2358         my $page=shift;
2359         my $testpage=shift;
2360         my %params=@_;
2361
2362         $testpage=derel($testpage, $params{location});
2363
2364         if (exists $IkiWiki::pagectime{$testpage}) {
2365                 if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
2366                         return IkiWiki::SuccessReason->new("$page created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2367                 }
2368                 else {
2369                         return IkiWiki::FailReason->new("$page not created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
2370                 }
2371         }
2372         else {
2373                 return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
2374         }
2375 }
2376
2377 sub match_creation_day ($$;@) {
2378         if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
2379                 return IkiWiki::SuccessReason->new('creation_day matched');
2380         }
2381         else {
2382                 return IkiWiki::FailReason->new('creation_day did not match');
2383         }
2384 }
2385
2386 sub match_creation_month ($$;@) {
2387         if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
2388                 return IkiWiki::SuccessReason->new('creation_month matched');
2389         }
2390         else {
2391                 return IkiWiki::FailReason->new('creation_month did not match');
2392         }
2393 }
2394
2395 sub match_creation_year ($$;@) {
2396         if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
2397                 return IkiWiki::SuccessReason->new('creation_year matched');
2398         }
2399         else {
2400                 return IkiWiki::FailReason->new('creation_year did not match');
2401         }
2402 }
2403
2404 sub match_user ($$;@) {
2405         shift;
2406         my $user=shift;
2407         my %params=@_;
2408
2409         my $regexp=IkiWiki::glob2re($user);
2410
2411         if (! exists $params{user}) {
2412                 return IkiWiki::ErrorReason->new("no user specified");
2413         }
2414
2415         if (defined $params{user} && $params{user}=~/^$regexp$/i) {
2416                 return IkiWiki::SuccessReason->new("user is $user");
2417         }
2418         elsif (! defined $params{user}) {
2419                 return IkiWiki::FailReason->new("not logged in");
2420         }
2421         else {
2422                 return IkiWiki::FailReason->new("user is $params{user}, not $user");
2423         }
2424 }
2425
2426 sub match_admin ($$;@) {
2427         shift;
2428         shift;
2429         my %params=@_;
2430
2431         if (! exists $params{user}) {
2432                 return IkiWiki::ErrorReason->new("no user specified");
2433         }
2434
2435         if (defined $params{user} && IkiWiki::is_admin($params{user})) {
2436                 return IkiWiki::SuccessReason->new("user is an admin");
2437         }
2438         elsif (! defined $params{user}) {
2439                 return IkiWiki::FailReason->new("not logged in");
2440         }
2441         else {
2442                 return IkiWiki::FailReason->new("user is not an admin");
2443         }
2444 }
2445
2446 sub match_ip ($$;@) {
2447         shift;
2448         my $ip=shift;
2449         my %params=@_;
2450
2451         if (! exists $params{ip}) {
2452                 return IkiWiki::ErrorReason->new("no IP specified");
2453         }
2454
2455         if (defined $params{ip} && lc $params{ip} eq lc $ip) {
2456                 return IkiWiki::SuccessReason->new("IP is $ip");
2457         }
2458         else {
2459                 return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
2460         }
2461 }
2462
2463 package IkiWiki::SortSpec;
2464
2465 # This is in the SortSpec namespace so that the $a and $b that sort() uses
2466 # are easily available in this namespace, for cmp functions to use them.
2467 sub sort_pages {
2468         my $f=shift;
2469         sort $f @_
2470 }
2471
2472 sub cmp_title {
2473         IkiWiki::pagetitle(IkiWiki::basename($a))
2474         cmp
2475         IkiWiki::pagetitle(IkiWiki::basename($b))
2476 }
2477
2478 sub cmp_mtime { $IkiWiki::pagemtime{$b} <=> $IkiWiki::pagemtime{$a} }
2479 sub cmp_age { $IkiWiki::pagectime{$b} <=> $IkiWiki::pagectime{$a} }
2480
2481 1