X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/edb59cd5b949de7a68f3b74e7949bf3893b23c6a..11fc28970b329334d88d3667e5b55e0d57e353ab:/IkiWiki.pm

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 80e317110..1e9d1ca2a 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -12,87 +12,465 @@ use Storable;
 use open qw{:utf8 :std};
 
 use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
-	    %pagestate %renderedfiles %oldrenderedfiles %pagesources
-	    %destsources %depends %hooks %forcerebuild $gettext_obj};
+	    %pagestate %wikistate %renderedfiles %oldrenderedfiles
+	    %pagesources %destsources %depends %depends_simple %hooks
+	    %forcerebuild %loaded_plugins};
 
 use Exporter q{import};
-our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
-                 bestlink htmllink readfile writefile pagetype srcfile pagename
-                 displaytime will_render gettext urlto targetpage
-		 add_underlay
-                 %config %links %pagestate %renderedfiles
+our @EXPORT = qw(hook debug error template htmlpage deptype
+                 add_depends pagespec_match pagespec_match_list bestlink
+		 htmllink readfile writefile pagetype srcfile pagename
+		 displaytime will_render gettext urlto targetpage
+		 add_underlay pagetitle titlepage linkpage newpagefile
+		 inject add_link
+                 %config %links %pagestate %wikistate %renderedfiles
                  %pagesources %destsources);
-our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
+our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
 our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
-my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
+our $installdir='/usr'; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
+
+# Page dependency types.
+our $DEPEND_CONTENT=1;
+our $DEPEND_PRESENCE=2;
+our $DEPEND_LINKS=4;
 
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
 memoize("pagespec_translate");
-memoize("file_pruned");
-
-sub defaultconfig () { #{{{
-	return
-	wiki_file_prune_regexps => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
-		qr/\.x?html?$/, qr/\.ikiwiki-new$/,
-		qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
-		qr/(^|\/)_MTN\//,
-		qr/\.dpkg-tmp$/],
-	wiki_file_regexp => qr/(^[-[:alnum:]_.:\/+]+$)/,
-	web_commit_regexp => qr/^web commit (by (.*?(?=: |$))|from (\d+\.\d+\.\d+\.\d+)):?(.*)/,
-	verbose => 0,
-	syslog => 0,
-	wikiname => "wiki",
-	default_pageext => "mdwn",
-	htmlext => "html",
-	cgi => 0,
-	post_commit => 0,
-	rcs => '',
-	url => '',
-	cgiurl => '',
-	historyurl => '',
-	diffurl => '',
-	rss => 0,
-	atom => 0,
-	allowrss => 0,
-	allowatom => 0,
-	discussion => 1,
-	rebuild => 0,
-	refresh => 0,
-	getctime => 0,
-	w3mmode => 0,
-	wrapper => undef,
-	wrappermode => undef,
-	svnpath => "trunk",
-	gitorigin_branch => "origin",
-	gitmaster_branch => "master",
-	srcdir => undef,
-	destdir => undef,
-	pingurl => [],
-	templatedir => "$installdir/share/ikiwiki/templates",
-	underlaydir => "$installdir/share/ikiwiki/basewiki",
-	underlaydirs => [],
-	setup => undef,
-	adminuser => undef,
-	adminemail => undef,
-	plugin => [qw{mdwn link inline htmlscrubber passwordauth openid
-			signinedit lockedit conditional recentchanges}],
-	libdir => undef,
-	timeformat => '%c',
-	locale => undef,
-	sslcookie => 0,
-	httpauth => 0,
-	userdir => "",
-	usedirs => 1,
-	numbacklinks => 10,
-	account_creation_password => "",
-	prefix_directives => 0,
-	hardlink => 0,
-	cgi_disable_uploads => 1,
-} #}}}
-
-sub checkconfig () { #{{{
+memoize("template_file");
+
+sub getsetup () {
+	wikiname => {
+		type => "string",
+		default => "wiki",
+		description => "name of the wiki",
+		safe => 1,
+		rebuild => 1,
+	},
+	adminemail => {
+		type => "string",
+		default => undef,
+		example => 'me@example.com',
+		description => "contact email for wiki",
+		safe => 1,
+		rebuild => 0,
+	},
+	adminuser => {
+		type => "string",
+		default => [],
+		description => "users who are wiki admins",
+		safe => 1,
+		rebuild => 0,
+	},
+	banned_users => {
+		type => "string",
+		default => [],
+		description => "users who are banned from the wiki",
+		safe => 1,
+		rebuild => 0,
+	},
+	srcdir => {
+		type => "string",
+		default => undef,
+		example => "$ENV{HOME}/wiki",
+		description => "where the source of the wiki is located",
+		safe => 0, # path
+		rebuild => 1,
+	},
+	destdir => {
+		type => "string",
+		default => undef,
+		example => "/var/www/wiki",
+		description => "where to build the wiki",
+		safe => 0, # path
+		rebuild => 1,
+	},
+	url => {
+		type => "string",
+		default => '',
+		example => "http://example.com/wiki",
+		description => "base url to the wiki",
+		safe => 1,
+		rebuild => 1,
+	},
+	cgiurl => {
+		type => "string",
+		default => '',
+		example => "http://example.com/wiki/ikiwiki.cgi",
+		description => "url to the ikiwiki.cgi",
+		safe => 1,
+		rebuild => 1,
+	},
+	cgi_wrapper => {
+		type => "string",
+		default => '',
+		example => "/var/www/wiki/ikiwiki.cgi",
+		description => "filename of cgi wrapper to generate",
+		safe => 0, # file
+		rebuild => 0,
+	},
+	cgi_wrappermode => {
+		type => "string",
+		default => '06755',
+		description => "mode for cgi_wrapper (can safely be made suid)",
+		safe => 0,
+		rebuild => 0,
+	},
+	rcs => {
+		type => "string",
+		default => '',
+		description => "rcs backend to use",
+		safe => 0, # don't allow overriding
+		rebuild => 0,
+	},
+	default_plugins => {
+		type => "internal",
+		default => [qw{mdwn link inline meta htmlscrubber passwordauth
+				openid signinedit lockedit conditional
+				recentchanges parentlinks editpage}],
+		description => "plugins to enable by default",
+		safe => 0,
+		rebuild => 1,
+	},
+	add_plugins => {
+		type => "string",
+		default => [],
+		description => "plugins to add to the default configuration",
+		safe => 1,
+		rebuild => 1,
+	},
+	disable_plugins => {
+		type => "string",
+		default => [],
+		description => "plugins to disable",
+		safe => 1,
+		rebuild => 1,
+	},
+	templatedir => {
+		type => "string",
+		default => "$installdir/share/ikiwiki/templates",
+		description => "location of template files",
+		advanced => 1,
+		safe => 0, # path
+		rebuild => 1,
+	},
+	templatedirs => {
+		type => "internal",
+		default => [],
+		description => "additional directories containing template files",
+		safe => 0,
+		rebuild => 0,
+	},
+	underlaydir => {
+		type => "string",
+		default => "$installdir/share/ikiwiki/basewiki",
+		description => "base wiki source location",
+		advanced => 1,
+		safe => 0, # path
+		rebuild => 0,
+	},
+	underlaydirbase => {
+		type => "internal",
+		default => "$installdir/share/ikiwiki",
+		description => "parent directory containing additional underlays",
+		safe => 0,
+		rebuild => 0,
+	},
+	wrappers => {
+		type => "internal",
+		default => [],
+		description => "wrappers to generate",
+		safe => 0,
+		rebuild => 0,
+	},
+	underlaydirs => {
+		type => "internal",
+		default => [],
+		description => "additional underlays to use",
+		safe => 0,
+		rebuild => 0,
+	},
+	verbose => {
+		type => "boolean",
+		example => 1,
+		description => "display verbose messages?",
+		safe => 1,
+		rebuild => 0,
+	},
+	syslog => {
+		type => "boolean",
+		example => 1,
+		description => "log to syslog?",
+		safe => 1,
+		rebuild => 0,
+	},
+	usedirs => {
+		type => "boolean",
+		default => 1,
+		description => "create output files named page/index.html?",
+		safe => 0, # changing requires manual transition
+		rebuild => 1,
+	},
+	prefix_directives => {
+		type => "boolean",
+		default => 1,
+		description => "use '!'-prefixed preprocessor directives?",
+		safe => 0, # changing requires manual transition
+		rebuild => 1,
+	},
+	indexpages => {
+		type => "boolean",
+		default => 0,
+		description => "use page/index.mdwn source files",
+		safe => 1,
+		rebuild => 1,
+	},
+	discussion => {
+		type => "boolean",
+		default => 1,
+		description => "enable Discussion pages?",
+		safe => 1,
+		rebuild => 1,
+	},
+	discussionpage => {
+		type => "string",
+		default => gettext("Discussion"),
+		description => "name of Discussion pages",
+		safe => 1,
+		rebuild => 1,
+	},
+	sslcookie => {
+		type => "boolean",
+		default => 0,
+		description => "only send cookies over SSL connections?",
+		advanced => 1,
+		safe => 1,
+		rebuild => 0,
+	},
+	default_pageext => {
+		type => "string",
+		default => "mdwn",
+		description => "extension to use for new pages",
+		safe => 0, # not sanitized
+		rebuild => 0,
+	},
+	htmlext => {
+		type => "string",
+		default => "html",
+		description => "extension to use for html files",
+		safe => 0, # not sanitized
+		rebuild => 1,
+	},
+	timeformat => {
+		type => "string",
+		default => '%c',
+		description => "strftime format string to display date",
+		advanced => 1,
+		safe => 1,
+		rebuild => 1,
+	},
+	locale => {
+		type => "string",
+		default => undef,
+		example => "en_US.UTF-8",
+		description => "UTF-8 locale to use",
+		advanced => 1,
+		safe => 0,
+		rebuild => 1,
+	},
+	userdir => {
+		type => "string",
+		default => "",
+		example => "users",
+		description => "put user pages below specified page",
+		safe => 1,
+		rebuild => 1,
+	},
+	numbacklinks => {
+		type => "integer",
+		default => 10,
+		description => "how many backlinks to show before hiding excess (0 to show all)",
+		safe => 1,
+		rebuild => 1,
+	},
+	hardlink => {
+		type => "boolean",
+		default => 0,
+		description => "attempt to hardlink source files? (optimisation for large files)",
+		advanced => 1,
+		safe => 0, # paranoia
+		rebuild => 0,
+	},
+	umask => {
+		type => "integer",
+		example => "022",
+		description => "force ikiwiki to use a particular umask",
+		advanced => 1,
+		safe => 0, # paranoia
+		rebuild => 0,
+	},
+	wrappergroup => {
+		type => "string",
+		example => "ikiwiki",
+		description => "group for wrappers to run in",
+		advanced => 1,
+		safe => 0, # paranoia
+		rebuild => 0,
+	},
+	libdir => {
+		type => "string",
+		default => "",
+		example => "$ENV{HOME}/.ikiwiki/",
+		description => "extra library and plugin directory",
+		advanced => 1,
+		safe => 0, # directory
+		rebuild => 0,
+	},
+	ENV => {
+		type => "string", 
+		default => {},
+		description => "environment variables",
+		safe => 0, # paranoia
+		rebuild => 0,
+	},
+	exclude => {
+		type => "string",
+		default => undef,
+		example => '\.wav$',
+		description => "regexp of source files to ignore",
+		advanced => 1,
+		safe => 0, # regexp
+		rebuild => 1,
+	},
+	wiki_file_prune_regexps => {
+		type => "internal",
+		default => [qr/(^|\/)\.\.(\/|$)/, qr/^\./, qr/\/\./,
+			qr/\.x?html?$/, qr/\.ikiwiki-new$/,
+			qr/(^|\/).svn\//, qr/.arch-ids\//, qr/{arch}\//,
+			qr/(^|\/)_MTN\//, qr/(^|\/)_darcs\//,
+			qr/(^|\/)CVS\//, qr/\.dpkg-tmp$/],
+		description => "regexps of source files to ignore",
+		safe => 0,
+		rebuild => 1,
+	},
+	wiki_file_chars => {
+		type => "string",
+		description => "specifies the characters that are allowed in source filenames",
+		default => "-[:alnum:]+/.:_",
+		safe => 0,
+		rebuild => 1,
+	},
+	wiki_file_regexp => {
+		type => "internal",
+		description => "regexp of legal source files",
+		safe => 0,
+		rebuild => 1,
+	},
+	web_commit_regexp => {
+		type => "internal",
+		default => qr/^web commit (by (.*?(?=: |$))|from ([0-9a-fA-F:.]+[0-9a-fA-F])):?(.*)/,
+		description => "regexp to parse web commits from logs",
+		safe => 0,
+		rebuild => 0,
+	},
+	cgi => {
+		type => "internal",
+		default => 0,
+		description => "run as a cgi",
+		safe => 0,
+		rebuild => 0,
+	},
+	cgi_disable_uploads => {
+		type => "internal",
+		default => 1,
+		description => "whether CGI should accept file uploads",
+		safe => 0,
+		rebuild => 0,
+	},
+	post_commit => {
+		type => "internal",
+		default => 0,
+		description => "run as a post-commit hook",
+		safe => 0,
+		rebuild => 0,
+	},
+	rebuild => {
+		type => "internal",
+		default => 0,
+		description => "running in rebuild mode",
+		safe => 0,
+		rebuild => 0,
+	},
+	setup => {
+		type => "internal",
+		default => undef,
+		description => "running in setup mode",
+		safe => 0,
+		rebuild => 0,
+	},
+	refresh => {
+		type => "internal",
+		default => 0,
+		description => "running in refresh mode",
+		safe => 0,
+		rebuild => 0,
+	},
+	test_receive => {
+		type => "internal",
+		default => 0,
+		description => "running in receive test mode",
+		safe => 0,
+		rebuild => 0,
+	},
+	getctime => {
+		type => "internal",
+		default => 0,
+		description => "running in getctime mode",
+		safe => 0,
+		rebuild => 0,
+	},
+	w3mmode => {
+		type => "internal",
+		default => 0,
+		description => "running in w3mmode",
+		safe => 0,
+		rebuild => 0,
+	},
+	wikistatedir => {
+		type => "internal",
+		default => undef,
+		description => "path to the .ikiwiki directory holding ikiwiki state",
+		safe => 0,
+		rebuild => 0,
+	},
+	setupfile => {
+		type => "internal",
+		default => undef,
+		description => "path to setup file",
+		safe => 0,
+		rebuild => 0,
+	},
+	allow_symlinks_before_srcdir => {
+		type => "boolean",
+		default => 0,
+		description => "allow symlinks in the path leading to the srcdir (potentially insecure)",
+		safe => 0,
+		rebuild => 0,
+	},
+}
+
+sub defaultconfig () {
+	my %s=getsetup();
+	my @ret;
+	foreach my $key (keys %s) {
+		push @ret, $key, $s{$key}->{default};
+	}
+	use Data::Dumper;
+	return @ret;
+}
+
+sub checkconfig () {
 	# locale stuff; avoid LC_ALL since it overrides everything
 	if (defined $ENV{LC_ALL}) {
 		$ENV{LANG} = $ENV{LC_ALL};
@@ -101,9 +479,13 @@ sub checkconfig () { #{{{
 	if (defined $config{locale}) {
 		if (POSIX::setlocale(&POSIX::LC_ALL, $config{locale})) {
 			$ENV{LANG}=$config{locale};
-			$gettext_obj=undef;
+			define_gettext();
 		}
 	}
+		
+	if (! defined $config{wiki_file_regexp}) {
+		$config{wiki_file_regexp}=qr/(^[$config{wiki_file_chars}]+$)/;
+	}
 
 	if (ref $config{ENV} eq 'HASH') {
 		foreach my $val (keys %{$config{ENV}}) {
@@ -126,45 +508,67 @@ sub checkconfig () { #{{{
 	}
 	
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
-		unless exists $config{wikistatedir};
-	
-	if ($config{rcs}) {
-		eval qq{use IkiWiki::Rcs::$config{rcs}};
-		if ($@) {
-			error("Failed to load RCS module IkiWiki::Rcs::$config{rcs}: $@");
-		}
-	}
-	else {
-		require IkiWiki::Rcs::Stub;
-	}
+		unless exists $config{wikistatedir} && defined $config{wikistatedir};
 
-	if (exists $config{umask}) {
+	if (defined $config{umask}) {
 		umask(possibly_foolish_untaint($config{umask}));
 	}
 
 	run_hooks(checkconfig => sub { shift->() });
 
 	return 1;
-} #}}}
+}
 
-sub loadplugins () { #{{{
-	if (defined $config{libdir}) {
+sub listplugins () {
+	my %ret;
+
+	foreach my $dir (@INC, $config{libdir}) {
+		next unless defined $dir && length $dir;
+		foreach my $file (glob("$dir/IkiWiki/Plugin/*.pm")) {
+			my ($plugin)=$file=~/.*\/(.*)\.pm$/;
+			$ret{$plugin}=1;
+		}
+	}
+	foreach my $dir ($config{libdir}, "$installdir/lib/ikiwiki") {
+		next unless defined $dir && length $dir;
+		foreach my $file (glob("$dir/plugins/*")) {
+			$ret{basename($file)}=1 if -x $file;
+		}
+	}
+
+	return keys %ret;
+}
+
+sub loadplugins () {
+	if (defined $config{libdir} && length $config{libdir}) {
 		unshift @INC, possibly_foolish_untaint($config{libdir});
 	}
 
-	loadplugin($_) foreach @{$config{plugin}};
+	foreach my $plugin (@{$config{default_plugins}}, @{$config{add_plugins}}) {
+		loadplugin($plugin);
+	}
+	
+	if ($config{rcs}) {
+		if (exists $hooks{rcs}) {
+			error(gettext("cannot use multiple rcs plugins"));
+		}
+		loadplugin($config{rcs});
+	}
+	if (! exists $hooks{rcs}) {
+		loadplugin("norcs");
+	}
 
 	run_hooks(getopt => sub { shift->() });
 	if (grep /^-/, @ARGV) {
-		print STDERR "Unknown option: $_\n"
+		print STDERR "Unknown option (or missing parameter): $_\n"
 			foreach grep /^-/, @ARGV;
 		usage();
 	}
 
 	return 1;
-} #}}}
+}
 
-sub loadplugin ($) { #{{{
+sub loadplugin ($) {
 	my $plugin=shift;
 
 	return if grep { $_ eq $plugin} @{$config{disable_plugins}};
@@ -172,8 +576,13 @@ sub loadplugin ($) { #{{{
 	foreach my $dir (defined $config{libdir} ? possibly_foolish_untaint($config{libdir}) : undef,
 	                 "$installdir/lib/ikiwiki") {
 		if (defined $dir && -x "$dir/plugins/$plugin") {
-			require IkiWiki::Plugin::external;
+			eval { require IkiWiki::Plugin::external };
+			if ($@) {
+				my $reason=$@;
+				error(sprintf(gettext("failed to load external plugin needed for %s plugin: %s"), $plugin, $reason));
+			}
 			import IkiWiki::Plugin::external "$dir/plugins/$plugin";
+			$loaded_plugins{$plugin}=1;
 			return 1;
 		}
 	}
@@ -183,10 +592,11 @@ sub loadplugin ($) { #{{{
 	if ($@) {
 		error("Failed to load plugin $mod: $@");
 	}
+	$loaded_plugins{$plugin}=1;
 	return 1;
-} #}}}
+}
 
-sub error ($;$) { #{{{
+sub error ($;$) {
 	my $message=shift;
 	my $cleaner=shift;
 	log_message('err' => $message) if $config{syslog};
@@ -194,15 +604,15 @@ sub error ($;$) { #{{{
 		$cleaner->();
 	}
 	die $message."\n";
-} #}}}
+}
 
-sub debug ($) { #{{{
+sub debug ($) {
 	return unless $config{verbose};
 	return log_message(debug => @_);
-} #}}}
+}
 
 my $log_open=0;
-sub log_message ($$) { #{{{
+sub log_message ($$) {
 	my $type=shift;
 
 	if ($config{syslog}) {
@@ -222,70 +632,105 @@ sub log_message ($$) { #{{{
 	else {
 		return print STDERR "@_\n";
 	}
-} #}}}
+}
 
-sub possibly_foolish_untaint ($) { #{{{
+sub possibly_foolish_untaint ($) {
 	my $tainted=shift;
 	my ($untainted)=$tainted=~/(.*)/s;
 	return $untainted;
-} #}}}
+}
 
-sub basename ($) { #{{{
+sub basename ($) {
 	my $file=shift;
 
 	$file=~s!.*/+!!;
 	return $file;
-} #}}}
+}
 
-sub dirname ($) { #{{{
+sub dirname ($) {
 	my $file=shift;
 
 	$file=~s!/*[^/]+$!!;
 	return $file;
-} #}}}
+}
 
-sub pagetype ($) { #{{{
+sub isinternal ($) {
 	my $page=shift;
+	return exists $pagesources{$page} &&
+		$pagesources{$page} =~ /\._([^.]+)$/;
+}
+
+sub pagetype ($) {
+	my $file=shift;
 	
-	if ($page =~ /\.([^.]+)$/) {
+	if ($file =~ /\.([^.]+)$/) {
 		return $1 if exists $hooks{htmlize}{$1};
 	}
+	my $base=basename($file);
+	if (exists $hooks{htmlize}{$base} &&
+	    $hooks{htmlize}{$base}{noextension}) {
+		return $base;
+	}
 	return;
-} #}}}
+}
 
-sub isinternal ($) { #{{{
-	my $page=shift;
-	return exists $pagesources{$page} &&
-		$pagesources{$page} =~ /\._([^.]+)$/;
-} #}}}
+my %pagename_cache;
 
-sub pagename ($) { #{{{
+sub pagename ($) {
 	my $file=shift;
 
+	if (exists $pagename_cache{$file}) {
+		return $pagename_cache{$file};
+	}
+
 	my $type=pagetype($file);
 	my $page=$file;
-	$page=~s/\Q.$type\E*$// if defined $type;
+ 	$page=~s/\Q.$type\E*$//
+		if defined $type && !$hooks{htmlize}{$type}{keepextension}
+			&& !$hooks{htmlize}{$type}{noextension};
+	if ($config{indexpages} && $page=~/(.*)\/index$/) {
+		$page=$1;
+	}
+
+	$pagename_cache{$file} = $page;
 	return $page;
-} #}}}
+}
+
+sub newpagefile ($$) {
+	my $page=shift;
+	my $type=shift;
+
+	if (! $config{indexpages} || $page eq 'index') {
+		return $page.".".$type;
+	}
+	else {
+		return $page."/index.".$type;
+	}
+}
 
-sub targetpage ($$) { #{{{
+sub targetpage ($$;$) {
 	my $page=shift;
 	my $ext=shift;
+	my $filename=shift;
 	
-	if (! $config{usedirs} || $page =~ /^index$/ ) {
+	if (defined $filename) {
+		return $page."/".$filename.".".$ext;
+	}
+	elsif (! $config{usedirs} || $page eq 'index') {
 		return $page.".".$ext;
-	} else {
+	}
+	else {
 		return $page."/index.".$ext;
 	}
-} #}}}
+}
 
-sub htmlpage ($) { #{{{
+sub htmlpage ($) {
 	my $page=shift;
 	
 	return targetpage($page, $config{htmlext});
-} #}}}
+}
 
-sub srcfile_stat { #{{{
+sub srcfile_stat {
 	my $file=shift;
 	my $nothrow=shift;
 
@@ -295,26 +740,27 @@ sub srcfile_stat { #{{{
 	}
 	error("internal error: $file cannot be found in $config{srcdir} or underlay") unless $nothrow;
 	return;
-} #}}}
+}
 
-sub srcfile ($;$) { #{{{
+sub srcfile ($;$) {
 	return (srcfile_stat(@_))[0];
-} #}}}
+}
 
-sub add_underlay ($) { #{{{
+sub add_underlay ($) {
 	my $dir=shift;
 
-	if ($dir=~/^\//) {
-		unshift @{$config{underlaydirs}}, $dir;
+	if ($dir !~ /^\//) {
+		$dir="$config{underlaydirbase}/$dir";
 	}
-	else {
-		unshift @{$config{underlaydirs}}, "$config{underlaydir}/../$dir";
+
+	if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
+		unshift @{$config{underlaydirs}}, $dir;
 	}
 
 	return 1;
-} #}}}
+}
 
-sub readfile ($;$$) { #{{{
+sub readfile ($;$$) {
 	my $file=shift;
 	my $binary=shift;
 	my $wantfd=shift;
@@ -328,11 +774,15 @@ sub readfile ($;$$) { #{{{
 	binmode($in) if ($binary);
 	return \*$in if $wantfd;
 	my $ret=<$in>;
+	# check for invalid utf-8, and toss it back to avoid crashes
+	if (! utf8::valid($ret)) {
+		$ret=encode_utf8($ret);
+	}
 	close $in || error("failed to read $file: $!");
 	return $ret;
-} #}}}
+}
 
-sub prep_writefile ($$) { #{{{
+sub prep_writefile ($$) {
 	my $file=shift;
 	my $destdir=shift;
 	
@@ -356,9 +806,9 @@ sub prep_writefile ($$) { #{{{
 	}
 
 	return 1;
-} #}}}
+}
 
-sub writefile ($$$;$$) { #{{{
+sub writefile ($$$;$$) {
 	my $file=shift; # can include subdirs
 	my $destdir=shift; # directory to put file in
 	my $content=shift;
@@ -386,17 +836,17 @@ sub writefile ($$$;$$) { #{{{
 		error("failed renaming $newfile to $destdir/$file: $!", $cleanup);
 
 	return 1;
-} #}}}
+}
 
 my %cleared;
-sub will_render ($$;$) { #{{{
+sub will_render ($$;$) {
 	my $page=shift;
 	my $dest=shift;
 	my $clear=shift;
 
 	# Important security check.
 	if (-e "$config{destdir}/$dest" && ! $config{rebuild} &&
-	    ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}})) {
+	    ! grep { $_ eq $dest } (@{$renderedfiles{$page}}, @{$oldrenderedfiles{$page}}, @{$wikistate{editpage}{previews}})) {
 		error("$config{destdir}/$dest independently created, not overwriting with version from $page");
 	}
 
@@ -413,9 +863,9 @@ sub will_render ($$;$) { #{{{
 	$destsources{$dest}=$page;
 
 	return 1;
-} #}}}
+}
 
-sub bestlink ($$) { #{{{
+sub bestlink ($$) {
 	my $page=shift;
 	my $link=shift;
 	
@@ -437,7 +887,7 @@ sub bestlink ($$) { #{{{
 		elsif (exists $pagecase{lc $l}) {
 			return $pagecase{lc $l};
 		}
-	} while $cwd=~s!/?[^/]+$!!;
+	} while $cwd=~s{/?[^/]+$}{};
 
 	if (length $config{userdir}) {
 		my $l = "$config{userdir}/".lc($link);
@@ -451,15 +901,15 @@ sub bestlink ($$) { #{{{
 
 	#print STDERR "warning: page $page, broken link: $link\n";
 	return "";
-} #}}}
+}
 
-sub isinlinableimage ($) { #{{{
+sub isinlinableimage ($) {
 	my $file=shift;
 	
 	return $file =~ /\.(png|gif|jpg|jpeg)$/i;
-} #}}}
+}
 
-sub pagetitle ($;$) { #{{{
+sub pagetitle ($;$) {
 	my $page=shift;
 	my $unescaped=shift;
 
@@ -471,28 +921,31 @@ sub pagetitle ($;$) { #{{{
 	}
 
 	return $page;
-} #}}}
+}
 
-sub titlepage ($) { #{{{
+sub titlepage ($) {
 	my $title=shift;
-	$title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+	# support use w/o %config set
+	my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
+	$title=~s/([^$chars]|_)/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 	return $title;
-} #}}}
+}
 
-sub linkpage ($) { #{{{
+sub linkpage ($) {
 	my $link=shift;
-	$link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+	my $chars = defined $config{wiki_file_chars} ? $config{wiki_file_chars} : "-[:alnum:]+/.:_";
+	$link=~s/([^$chars])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
 	return $link;
-} #}}}
+}
 
-sub cgiurl (@) { #{{{
+sub cgiurl (@) {
 	my %params=@_;
 
 	return $config{cgiurl}."?".
 		join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
-} #}}}
+}
 
-sub baseurl (;$) { #{{{
+sub baseurl (;$) {
 	my $page=shift;
 
 	return "$config{url}/" if ! defined $page;
@@ -501,9 +954,9 @@ sub baseurl (;$) { #{{{
 	$page=~s/[^\/]+$//;
 	$page=~s/[^\/]+\//..\//g;
 	return $page;
-} #}}}
+}
 
-sub abs2rel ($$) { #{{{
+sub abs2rel ($$) {
 	# Work around very innefficient behavior in File::Spec if abs2rel
 	# is passed two relative paths. It's much faster if paths are
 	# absolute! (Debian bug #376658; fixed in debian unstable now)
@@ -514,9 +967,16 @@ sub abs2rel ($$) { #{{{
 	my $ret=File::Spec->abs2rel($path, $base);
 	$ret=~s/^// if defined $ret;
 	return $ret;
-} #}}}
+}
+
+sub displaytime ($;$) {
+	# Plugins can override this function to mark up the time to
+	# display.
+	return '<span class="date">'.formattime(@_).'</span>';
+}
 
-sub displaytime ($;$) { #{{{
+sub formattime ($;$) {
+	# Plugins can override this function to format the time.
 	my $time=shift;
 	my $format=shift;
 	if (! defined $format) {
@@ -526,28 +986,29 @@ sub displaytime ($;$) { #{{{
 	# strftime doesn't know about encodings, so make sure
 	# its output is properly treated as utf8
 	return decode_utf8(POSIX::strftime($format, localtime($time)));
-} #}}}
+}
 
-sub beautify_urlpath ($) { #{{{
+sub beautify_urlpath ($) {
 	my $url=shift;
 
-	if ($config{usedirs}) {
-		$url =~ s!/index.$config{htmlext}$!/!;
+	# Ensure url is not an empty link, and if necessary,
+	# add ./ to avoid colon confusion.
+	if ($url !~ /^\// && $url !~ /^\.\.?\//) {
+		$url="./$url";
 	}
 
-	# Ensure url is not an empty link, and
-	# if it's relative, make that explicit to avoid colon confusion.
-	if ($url !~ /\//) {
-		$url="./$url";
+	if ($config{usedirs}) {
+		$url =~ s!/index.$config{htmlext}$!/!;
 	}
 
 	return $url;
-} #}}}
+}
 
-sub urlto ($$) { #{{{
+sub urlto ($$;$) {
 	my $to=shift;
 	my $from=shift;
-
+	my $absolute=shift;
+	
 	if (! length $to) {
 		return beautify_urlpath(baseurl($from)."index.$config{htmlext}");
 	}
@@ -556,12 +1017,16 @@ sub urlto ($$) { #{{{
 		$to=htmlpage($to);
 	}
 
+	if ($absolute) {
+		return $config{url}.beautify_urlpath("/".$to);
+	}
+
 	my $link = abs2rel($to, dirname(htmlpage($from)));
 
 	return beautify_urlpath($link);
-} #}}}
+}
 
-sub htmllink ($$$;@) { #{{{
+sub htmllink ($$$;@) {
 	my $lpage=shift; # the page doing the linking
 	my $page=shift; # the page that will contain the link (different for inline)
 	my $link=shift;
@@ -624,9 +1089,44 @@ sub htmllink ($$$;@) { #{{{
 	}
 
 	return "<a href=\"$bestlink\"@attrs>$linktext</a>";
-} #}}}
+}
+
+sub openiduser ($) {
+	my $user=shift;
+
+	if ($user =~ m!^https?://! &&
+	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
+		my $display;
+
+		if (Net::OpenID::VerifiedIdentity->can("DisplayOfURL")) {
+			# this works in at least 2.x
+			$display = Net::OpenID::VerifiedIdentity::DisplayOfURL($user);
+		}
+		else {
+			# this only works in 1.x
+			my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
+			$display=$oid->display;
+		}
+
+		# Convert "user.somehost.com" to "user [somehost.com]"
+		# (also "user.somehost.co.uk")
+		if ($display !~ /\[/) {
+			$display=~s/^([-a-zA-Z0-9]+?)\.([-.a-zA-Z0-9]+\.[a-z]+)$/$1 [$2]/;
+		}
+		# Convert "http://somehost.com/user" to "user [somehost.com]".
+		# (also "https://somehost.com/user/")
+		if ($display !~ /\[/) {
+			$display=~s/^https?:\/\/(.+)\/([^\/]+)\/?$/$2 [$1]/;
+		}
+		$display=~s!^https?://!!; # make sure this is removed
+		eval q{use CGI 'escapeHTML'};
+		error($@) if $@;
+		return escapeHTML($display);
+	}
+	return;
+}
 
-sub userlink ($) { #{{{
+sub userlink ($) {
 	my $user=shift;
 
 	my $oiduser=eval { openiduser($user) };
@@ -641,9 +1141,9 @@ sub userlink ($) { #{{{
 			length $config{userdir} ? $config{userdir}."/".$user : $user
 		), noimageinline => 1);
 	}
-} #}}}
+}
 
-sub htmlize ($$$$) { #{{{
+sub htmlize ($$$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $type=shift;
@@ -678,9 +1178,9 @@ sub htmlize ($$$$) { #{{{
 	}
 
 	return $content;
-} #}}}
+}
 
-sub linkify ($$$) { #{{{
+sub linkify ($$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $content=shift;
@@ -694,11 +1194,11 @@ sub linkify ($$$) { #{{{
 	});
 	
 	return $content;
-} #}}}
+}
 
 our %preprocessing;
 our $preprocess_preview=0;
-sub preprocess ($$$;$$) { #{{{
+sub preprocess ($$$;$$) {
 	my $page=shift; # the page the data comes from
 	my $destpage=shift; # the page the data will appear in (different for inline)
 	my $content=shift;
@@ -714,6 +1214,8 @@ sub preprocess ($$$;$$) { #{{{
 		my $prefix=shift;
 		my $command=shift;
 		my $params=shift;
+		$params="" if ! defined $params;
+
 		if (length $escape) {
 			return "[[$prefix$command $params]]";
 		}
@@ -758,13 +1260,10 @@ sub preprocess ($$$;$$) { #{{{
 			if ($preprocessing{$page}++ > 3) {
 				# Avoid loops of preprocessed pages preprocessing
 				# other pages that preprocess them, etc.
-				#translators: The first parameter is a
-				#translators: preprocessor directive name,
-				#translators: the second a page name, the
-				#translators: third a number.
-				return "[[".sprintf(gettext("%s preprocessing loop detected on %s at depth %i"),
-					$command, $page, $preprocessing{$page}).
-				"]]";
+				return "[[!$command <span class=\"error\">".
+					sprintf(gettext("preprocessing loop detected on %s at depth %i"),
+						$page, $preprocessing{$page}).
+					"</span>]]";
 			}
 			my $ret;
 			if (! $scan) {
@@ -777,9 +1276,10 @@ sub preprocess ($$$;$$) { #{{{
 					);
 				};
 				if ($@) {
-					chomp $@;
+					my $error=$@;
+					chomp $error;
 				 	$ret="[[!$command <span class=\"error\">".
-						gettext("Error").": $@"."</span>]]";
+						gettext("Error").": $error"."</span>]]";
 				}
 			}
 			else {
@@ -817,7 +1317,7 @@ sub preprocess ($$$;$$) { #{{{
 						|
 						"[^"]+"		# single-quoted value
 						|
-						[^\s\]]+	# unquoted value
+						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
 								# of directive
@@ -825,7 +1325,8 @@ sub preprocess ($$$;$$) { #{{{
 			*)?		# 0 or more parameters
 			\]\]		# directive closed
 		}sx;
-	} else {
+	}
+	else {
 		$regex = qr{
 			(\\?)		# 1: escape?
 			\[\[(!?)	# directive open; 2: optional prefix
@@ -839,7 +1340,7 @@ sub preprocess ($$$;$$) { #{{{
 						|
 						"[^"]+"		# single-quoted value
 						|
-						[^\s\]]+	# unquoted value
+						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
 								# of directive
@@ -851,9 +1352,9 @@ sub preprocess ($$$;$$) { #{{{
 
 	$content =~ s{$regex}{$handle->($1, $2, $3, $4)}eg;
 	return $content;
-} #}}}
+}
 
-sub filter ($$$) { #{{{
+sub filter ($$$) {
 	my $page=shift;
 	my $destpage=shift;
 	my $content=shift;
@@ -864,16 +1365,79 @@ sub filter ($$$) { #{{{
 	});
 
 	return $content;
-} #}}}
+}
 
-sub indexlink () { #{{{
+sub indexlink () {
 	return "<a href=\"$config{url}\">$config{wikiname}</a>";
-} #}}}
+}
+
+sub check_canedit ($$$;$) {
+	my $page=shift;
+	my $q=shift;
+	my $session=shift;
+	my $nonfatal=shift;
+	
+	my $canedit;
+	run_hooks(canedit => sub {
+		return if defined $canedit;
+		my $ret=shift->($page, $q, $session);
+		if (defined $ret) {
+			if ($ret eq "") {
+				$canedit=1;
+			}
+			elsif (ref $ret eq 'CODE') {
+				$ret->() unless $nonfatal;
+				$canedit=0;
+			}
+			elsif (defined $ret) {
+				error($ret) unless $nonfatal;
+				$canedit=0;
+			}
+		}
+	});
+	return defined $canedit ? $canedit : 1;
+}
+
+sub check_content (@) {
+	my %params=@_;
+	
+	return 1 if ! exists $hooks{checkcontent}; # optimisation
+
+	if (exists $pagesources{$params{page}}) {
+		my @diff;
+		my %old=map { $_ => 1 }
+		        split("\n", readfile(srcfile($pagesources{$params{page}})));
+		foreach my $line (split("\n", $params{content})) {
+			push @diff, $line if ! exists $old{$_};
+		}
+		$params{diff}=join("\n", @diff);
+	}
+
+	my $ok;
+	run_hooks(checkcontent => sub {
+		return if defined $ok;
+		my $ret=shift->(%params);
+		if (defined $ret) {
+			if ($ret eq "") {
+				$ok=1;
+			}
+			elsif (ref $ret eq 'CODE') {
+				$ret->() unless $params{nonfatal};
+				$ok=0;
+			}
+			elsif (defined $ret) {
+				error($ret) unless $params{nonfatal};
+				$ok=0;
+			}
+		}
+
+	});
+	return defined $ok ? $ok : 1;
+}
 
 my $wikilock;
 
-sub lockwiki (;$) { #{{{
-	my $wait=@_ ? shift : 1;
+sub lockwiki () {
 	# Take an exclusive lock on the wiki to prevent multiple concurrent
 	# run issues. The lock will be dropped on program exit.
 	if (! -d $config{wikistatedir}) {
@@ -881,32 +1445,21 @@ sub lockwiki (;$) { #{{{
 	}
 	open($wikilock, '>', "$config{wikistatedir}/lockfile") ||
 		error ("cannot write to $config{wikistatedir}/lockfile: $!");
-	if (! flock($wikilock, 2 | 4)) { # LOCK_EX | LOCK_NB
-		if ($wait) {
-			debug("wiki seems to be locked, waiting for lock");
-			my $wait=600; # arbitrary, but don't hang forever to 
-			              # prevent process pileup
-			for (1..$wait) {
-				return if flock($wikilock, 2 | 4);
-				sleep 1;
-			}
-			error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
-		}
-		else {
-			return 0;
-		}
+	if (! flock($wikilock, 2)) { # LOCK_EX
+		error("failed to get lock");
 	}
 	return 1;
-} #}}}
+}
 
-sub unlockwiki () { #{{{
+sub unlockwiki () {
+	POSIX::close($ENV{IKIWIKI_CGILOCK_FD}) if exists $ENV{IKIWIKI_CGILOCK_FD};
 	return close($wikilock) if $wikilock;
 	return;
-} #}}}
+}
 
 my $commitlock;
 
-sub commit_hook_enabled () { #{{{
+sub commit_hook_enabled () {
 	open($commitlock, '+>', "$config{wikistatedir}/commitlock") ||
 		error("cannot write to $config{wikistatedir}/commitlock: $!");
 	if (! flock($commitlock, 1 | 4)) { # LOCK_SH | LOCK_NB to test
@@ -915,27 +1468,28 @@ sub commit_hook_enabled () { #{{{
 	}
 	close($commitlock) || error("failed closing commitlock: $!");
 	return 1;
-} #}}}
+}
 
-sub disable_commit_hook () { #{{{
+sub disable_commit_hook () {
 	open($commitlock, '>', "$config{wikistatedir}/commitlock") ||
 		error("cannot write to $config{wikistatedir}/commitlock: $!");
 	if (! flock($commitlock, 2)) { # LOCK_EX
 		error("failed to get commit lock");
 	}
 	return 1;
-} #}}}
+}
 
-sub enable_commit_hook () { #{{{
+sub enable_commit_hook () {
 	return close($commitlock) if $commitlock;
 	return;
-} #}}}
+}
 
-sub loadindex () { #{{{
+sub loadindex () {
 	%oldrenderedfiles=%pagectime=();
 	if (! $config{rebuild}) {
 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
-		%destsources=%renderedfiles=%pagecase=%pagestate=();
+		%destsources=%renderedfiles=%pagecase=%pagestate=
+		%depends_simple=();
 	}
 	my $in;
 	if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
@@ -947,31 +1501,62 @@ sub loadindex () { #{{{
 			return;
 		}
 	}
-	my $ret=Storable::fd_retrieve($in);
-	if (! defined $ret) {
+
+	my $index=Storable::fd_retrieve($in);
+	if (! defined $index) {
 		return 0;
 	}
-	my %index=%$ret;
-	foreach my $src (keys %index) {
-		my %d=%{$index{$src}};
+
+	my $pages;
+	if (exists $index->{version} && ! ref $index->{version}) {
+		$pages=$index->{page};
+		%wikistate=%{$index->{state}};
+	}
+	else {
+		$pages=$index;
+		%wikistate=();
+	}
+
+	foreach my $src (keys %$pages) {
+		my $d=$pages->{$src};
 		my $page=pagename($src);
-		$pagectime{$page}=$d{ctime};
+		$pagectime{$page}=$d->{ctime};
 		if (! $config{rebuild}) {
 			$pagesources{$page}=$src;
-			$pagemtime{$page}=$d{mtime};
-			$renderedfiles{$page}=$d{dest};
-			if (exists $d{links} && ref $d{links}) {
-				$links{$page}=$d{links};
-				$oldlinks{$page}=[@{$d{links}}];
+			$pagemtime{$page}=$d->{mtime};
+			$renderedfiles{$page}=$d->{dest};
+			if (exists $d->{links} && ref $d->{links}) {
+				$links{$page}=$d->{links};
+				$oldlinks{$page}=[@{$d->{links}}];
 			}
-			if (exists $d{depends}) {
-				$depends{$page}=$d{depends};
+			if (ref $d->{depends_simple} eq 'ARRAY') {
+				# old format
+				$depends_simple{$page}={
+					map { $_ => 1 } @{$d->{depends_simple}}
+				};
 			}
-			if (exists $d{state}) {
-				$pagestate{$page}=$d{state};
+			elsif (exists $d->{depends_simple}) {
+				$depends_simple{$page}=$d->{depends_simple};
+			}
+			if (exists $d->{dependslist}) {
+				# old format
+				$depends{$page}={
+					map { $_ => $DEPEND_CONTENT }
+						@{$d->{dependslist}}
+				};
+			}
+			elsif (exists $d->{depends} && ! ref $d->{depends}) {
+				# old format
+				$depends{$page}={$d->{depends} => $DEPEND_CONTENT };
+			}
+			elsif (exists $d->{depends}) {
+				$depends{$page}=$d->{depends};
+			}
+			if (exists $d->{state}) {
+				$pagestate{$page}=$d->{state};
 			}
 		}
-		$oldrenderedfiles{$page}=[@{$d{dest}}];
+		$oldrenderedfiles{$page}=[@{$d->{dest}}];
 	}
 	foreach my $page (keys %pagesources) {
 		$pagecase{lc $page}=$page;
@@ -980,9 +1565,9 @@ sub loadindex () { #{{{
 		$destsources{$_}=$page foreach @{$renderedfiles{$page}};
 	}
 	return close($in);
-} #}}}
+}
 
-sub saveindex () { #{{{
+sub saveindex () {
 	run_hooks(savestate => sub { shift->() });
 
 	my %hookids;
@@ -997,12 +1582,13 @@ sub saveindex () { #{{{
 	my $newfile="$config{wikistatedir}/indexdb.new";
 	my $cleanup = sub { unlink($newfile) };
 	open (my $out, '>', $newfile) || error("cannot write to $newfile: $!", $cleanup);
+
 	my %index;
 	foreach my $page (keys %pagemtime) {
 		next unless $pagemtime{$page};
 		my $src=$pagesources{$page};
 
-		$index{$src}={
+		$index{page}{$src}={
 			ctime => $pagectime{$page},
 			mtime => $pagemtime{$page},
 			dest => $renderedfiles{$page},
@@ -1010,17 +1596,30 @@ sub saveindex () { #{{{
 		};
 
 		if (exists $depends{$page}) {
-			$index{$src}{depends} = $depends{$page};
+			$index{page}{$src}{depends} = $depends{$page};
+		}
+
+		if (exists $depends_simple{$page}) {
+			$index{page}{$src}{depends_simple} = $depends_simple{$page};
 		}
 
 		if (exists $pagestate{$page}) {
 			foreach my $id (@hookids) {
 				foreach my $key (keys %{$pagestate{$page}{$id}}) {
-					$index{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
+					$index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
 				}
 			}
 		}
 	}
+
+	$index{state}={};
+	foreach my $id (@hookids) {
+		foreach my $key (keys %{$wikistate{$id}}) {
+			$index{state}{$id}{$key}=$wikistate{$id}{$key};
+		}
+	}
+	
+	$index{version}="3";
 	my $ret=Storable::nstore_fd(\%index, $out);
 	return if ! defined $ret || ! $ret;
 	close $out || error("failed saving to $newfile: $!", $cleanup);
@@ -1028,18 +1627,19 @@ sub saveindex () { #{{{
 		error("failed renaming $newfile to $config{wikistatedir}/indexdb", $cleanup);
 	
 	return 1;
-} #}}}
+}
 
-sub template_file ($) { #{{{
+sub template_file ($) {
 	my $template=shift;
 
-	foreach my $dir ($config{templatedir}, "$installdir/share/ikiwiki/templates") {
+	foreach my $dir ($config{templatedir}, @{$config{templatedirs}},
+	                 "$installdir/share/ikiwiki/templates") {
 		return "$dir/$template" if -e "$dir/$template";
 	}
 	return;
-} #}}}
+}
 
-sub template_params (@) { #{{{
+sub template_params (@) {
 	my $filename=template_file(shift);
 
 	if (! defined $filename) {
@@ -1058,14 +1658,14 @@ sub template_params (@) { #{{{
 		@_
 	);
 	return wantarray ? @ret : {@ret};
-} #}}}
+}
 
-sub template ($;@) { #{{{
+sub template ($;@) {
 	require HTML::Template;
 	return HTML::Template->new(template_params(@_));
-} #}}}
+}
 
-sub misctemplate ($$;@) { #{{{
+sub misctemplate ($$;@) {
 	my $title=shift;
 	my $pagebody=shift;
 	
@@ -1082,9 +1682,9 @@ sub misctemplate ($$;@) { #{{{
 		shift->(page => "", destpage => "", template => $template);
 	});
 	return $template->output;
-}#}}}
+}
 
-sub hook (@) { # {{{
+sub hook (@) {
 	my %param=@_;
 	
 	if (! exists $param{type} || ! ref $param{call} || ! exists $param{id}) {
@@ -1095,150 +1695,213 @@ sub hook (@) { # {{{
 	
 	$hooks{$param{type}}{$param{id}}=\%param;
 	return 1;
-} # }}}
+}
 
-sub run_hooks ($$) { # {{{
+sub run_hooks ($$) {
 	# Calls the given sub for each hook of the given type,
 	# passing it the hook function to call.
 	my $type=shift;
 	my $sub=shift;
 
 	if (exists $hooks{$type}) {
-		my @deferred;
+		my (@first, @middle, @last);
 		foreach my $id (keys %{$hooks{$type}}) {
-			if ($hooks{$type}{$id}{last}) {
-				push @deferred, $id;
-				next;
+			if ($hooks{$type}{$id}{first}) {
+				push @first, $id;
+			}
+			elsif ($hooks{$type}{$id}{last}) {
+				push @last, $id;
+			}
+			else {
+				push @middle, $id;
 			}
-			$sub->($hooks{$type}{$id}{call});
 		}
-		foreach my $id (@deferred) {
+		foreach my $id (@first, @middle, @last) {
 			$sub->($hooks{$type}{$id}{call});
 		}
 	}
 
 	return 1;
-} #}}}
+}
 
-sub globlist_to_pagespec ($) { #{{{
-	my @globlist=split(' ', shift);
+sub rcs_update () {
+	$hooks{rcs}{rcs_update}{call}->(@_);
+}
 
-	my (@spec, @skip);
-	foreach my $glob (@globlist) {
-		if ($glob=~/^!(.*)/) {
-			push @skip, $glob;
-		}
-		else {
-			push @spec, $glob;
-		}
-	}
+sub rcs_prepedit ($) {
+	$hooks{rcs}{rcs_prepedit}{call}->(@_);
+}
 
-	my $spec=join(' or ', @spec);
-	if (@skip) {
-		my $skip=join(' and ', @skip);
-		if (length $spec) {
-			$spec="$skip and ($spec)";
-		}
-		else {
-			$spec=$skip;
-		}
-	}
-	return $spec;
-} #}}}
+sub rcs_commit ($$$;$$) {
+	$hooks{rcs}{rcs_commit}{call}->(@_);
+}
+
+sub rcs_commit_staged ($$$) {
+	$hooks{rcs}{rcs_commit_staged}{call}->(@_);
+}
+
+sub rcs_add ($) {
+	$hooks{rcs}{rcs_add}{call}->(@_);
+}
+
+sub rcs_remove ($) {
+	$hooks{rcs}{rcs_remove}{call}->(@_);
+}
 
-sub is_globlist ($) { #{{{
-	my $s=shift;
-	return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
-} #}}}
+sub rcs_rename ($$) {
+	$hooks{rcs}{rcs_rename}{call}->(@_);
+}
 
-sub safequote ($) { #{{{
-	my $s=shift;
-	$s=~s/[{}]//g;
-	return "q{$s}";
-} #}}}
+sub rcs_recentchanges ($) {
+	$hooks{rcs}{rcs_recentchanges}{call}->(@_);
+}
 
-sub add_depends ($$) { #{{{
+sub rcs_diff ($) {
+	$hooks{rcs}{rcs_diff}{call}->(@_);
+}
+
+sub rcs_getctime ($) {
+	$hooks{rcs}{rcs_getctime}{call}->(@_);
+}
+
+sub rcs_receive () {
+	$hooks{rcs}{rcs_receive}{call}->();
+}
+
+sub add_depends ($$;$) {
 	my $page=shift;
 	my $pagespec=shift;
-	
-	return unless pagespec_valid($pagespec);
-
-	if (! exists $depends{$page}) {
-		$depends{$page}=$pagespec;
-	}
-	else {
-		$depends{$page}=pagespec_merge($depends{$page}, $pagespec);
+	my $deptype=shift || $DEPEND_CONTENT;
+
+	# Is the pagespec a simple page name?
+	if ($pagespec =~ /$config{wiki_file_regexp}/ &&
+	    $pagespec !~ /[\s*?()!]/) {
+		$depends_simple{$page}{lc $pagespec} |= $deptype;
+		return 1;
+	}
+
+	# Add explicit dependencies for influences.
+	my $sub=pagespec_translate($pagespec);
+	return if $@;
+	foreach my $p (keys %pagesources) {
+		my $r=$sub->($p, location => $page);
+		my $i=$r->influences;
+		foreach my $k (keys %$i) {
+			$depends_simple{$page}{lc $k} |= $i->{$k};
+		}
+		last if $r->influences_static;
 	}
 
+	$depends{$page}{$pagespec} |= $deptype;
 	return 1;
-} # }}}
+}
 
-sub file_pruned ($$) { #{{{
-	require File::Spec;
-	my $file=File::Spec->canonpath(shift);
-	my $base=File::Spec->canonpath(shift);
-	$file =~ s#^\Q$base\E/+##;
+sub deptype (@) {
+	my $deptype=0;
+	foreach my $type (@_) {
+		if ($type eq 'presence') {
+			$deptype |= $DEPEND_PRESENCE;
+		}
+		elsif ($type eq 'links') { 
+			$deptype |= $DEPEND_LINKS;
+		}
+		elsif ($type eq 'content') {
+			$deptype |= $DEPEND_CONTENT;
+		}
+	}
+	return $deptype;
+}
+
+sub file_pruned ($;$) {
+	my $file=shift;
+	if (@_) {
+		require File::Spec;
+		$file=File::Spec->canonpath($file);
+		my $base=File::Spec->canonpath(shift);
+		return if $file eq $base;
+		$file =~ s#^\Q$base\E/+##;
+	}
 
 	my $regexp='('.join('|', @{$config{wiki_file_prune_regexps}}).')';
-	return $file =~ m/$regexp/ && $file ne $base;
-} #}}}
+	return $file =~ m/$regexp/;
+}
 
-sub gettext { #{{{
-	# Only use gettext in the rare cases it's needed.
+sub define_gettext () {
+	# If translation is needed, redefine the gettext function to do it.
+	# Otherwise, it becomes a quick no-op.
+	no warnings 'redefine';
 	if ((exists $ENV{LANG} && length $ENV{LANG}) ||
 	    (exists $ENV{LC_ALL} && length $ENV{LC_ALL}) ||
 	    (exists $ENV{LC_MESSAGES} && length $ENV{LC_MESSAGES})) {
-		if (! $gettext_obj) {
-			$gettext_obj=eval q{
+	    	*gettext=sub {
+			my $gettext_obj=eval q{
 				use Locale::gettext q{textdomain};
 				Locale::gettext->domain('ikiwiki')
 			};
-			if ($@) {
-				print STDERR "$@";
-				$gettext_obj=undef;
+
+			if ($gettext_obj) {
+				$gettext_obj->get(shift);
+			}
+			else {
 				return shift;
 			}
-		}
-		return $gettext_obj->get(shift);
+		};
 	}
 	else {
-		return shift;
+		*gettext=sub { return shift };
 	}
-} #}}}
+}
 
-sub yesno ($) { #{{{
-	my $val=shift;
+sub gettext {
+	define_gettext();
+	gettext(@_);
+}
 
-	return (defined $val && lc($val) eq gettext("yes"));
-} #}}}
+sub yesno ($) {
+	my $val=shift;
 
-sub pagespec_merge ($$) { #{{{
-	my $a=shift;
-	my $b=shift;
+	return (defined $val && (lc($val) eq gettext("yes") || lc($val) eq "yes" || $val eq "1"));
+}
 
-	return $a if $a eq $b;
+sub inject {
+	# Injects a new function into the symbol table to replace an
+	# exported function.
+	my %params=@_;
 
-        # Support for old-style GlobLists.
-        if (is_globlist($a)) {
-                $a=globlist_to_pagespec($a);
-        }
-        if (is_globlist($b)) {
-                $b=globlist_to_pagespec($b);
-        }
+	# This is deep ugly perl foo, beware.
+	no strict;
+	no warnings;
+	if (! defined $params{parent}) {
+		$params{parent}='::';
+		$params{old}=\&{$params{name}};
+		$params{name}=~s/.*:://;
+	}
+	my $parent=$params{parent};
+	foreach my $ns (grep /^\w+::/, keys %{$parent}) {
+		$ns = $params{parent} . $ns;
+		inject(%params, parent => $ns) unless $ns eq '::main::';
+		*{$ns . $params{name}} = $params{call}
+			if exists ${$ns}{$params{name}} &&
+			   \&{${$ns}{$params{name}}} == $params{old};
+	}
+	use strict;
+	use warnings;
+}
+
+sub add_link ($$) {
+	my $page=shift;
+	my $link=shift;
 
-	return "($a) or ($b)";
-} #}}}
+	push @{$links{$page}}, $link
+		unless grep { $_ eq $link } @{$links{$page}};
+}
 
-sub pagespec_translate ($) { #{{{
+sub pagespec_translate ($) {
 	my $spec=shift;
 
-	# Support for old-style GlobLists.
-	if (is_globlist($spec)) {
-		$spec=globlist_to_pagespec($spec);
-	}
-
 	# Convert spec to perl code.
 	my $code="";
+	my @data;
 	while ($spec=~m{
 		\s*		# ignore whitespace
 		(		# 1: match a single word
@@ -1253,39 +1916,42 @@ sub pagespec_translate ($) { #{{{
 			[^\s()]+	# any other text
 		)
 		\s*		# ignore whitespace
-	}igx) {
+	}gx) {
 		my $word=$1;
 		if (lc $word eq 'and') {
-			$code.=' &&';
+			$code.=' &';
 		}
 		elsif (lc $word eq 'or') {
-			$code.=' ||';
+			$code.=' |';
 		}
 		elsif ($word eq "(" || $word eq ")" || $word eq "!") {
 			$code.=' '.$word;
 		}
 		elsif ($word =~ /^(\w+)\((.*)\)$/) {
 			if (exists $IkiWiki::PageSpec::{"match_$1"}) {
-				$code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
+				push @data, $2;
+				$code.="IkiWiki::PageSpec::match_$1(\$page, \$data[$#data], \@_)";
 			}
 			else {
-				$code.=' 0';
+				push @data, qq{unknown function in pagespec "$word"};
+				$code.="IkiWiki::ErrorReason->new(\$data[$#data])";
 			}
 		}
 		else {
-			$code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
+			push @data, $word;
+			$code.=" IkiWiki::PageSpec::match_glob(\$page, \$data[$#data], \@_)";
 		}
 	}
 
 	if (! length $code) {
-		$code=0;
+		$code="IkiWiki::FailReason->new('empty pagespec')";
 	}
 
 	no warnings;
 	return eval 'sub { my $page=shift; '.$code.' }';
-} #}}}
+}
 
-sub pagespec_match ($$;@) { #{{{
+sub pagespec_match ($$;@) {
 	my $page=shift;
 	my $spec=shift;
 	my @params=@_;
@@ -1296,69 +1962,193 @@ sub pagespec_match ($$;@) { #{{{
 	}
 
 	my $sub=pagespec_translate($spec);
-	return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
+	return IkiWiki::ErrorReason->new("syntax error in pagespec \"$spec\"")
+		if $@ || ! defined $sub;
 	return $sub->($page, @params);
-} #}}}
+}
+
+sub pagespec_match_list ($$;@) {
+	my $page=shift;
+	my $pagespec=shift;
+	my %params=@_;
+
+	# Backwards compatability with old calling convention.
+	if (ref $page) {
+		print STDERR "warning: a plugin (".caller().") is using pagespec_match_list in an obsolete way, and needs to be updated\n";
+		$params{list}=$page;
+		$page=$params{location}; # ugh!
+	}
+
+	my $sub=pagespec_translate($pagespec);
+	error "syntax error in pagespec \"$pagespec\""
+		if $@ || ! defined $sub;
+
+	my @candidates;
+	if (exists $params{list}) {
+		@candidates=exists $params{filter}
+			? grep { ! $params{filter}->($_) } @{$params{list}}
+			: @{$params{list}};
+	}
+	else {
+		@candidates=exists $params{filter}
+			? grep { ! $params{filter}->($_) } keys %pagesources
+			: keys %pagesources;
+	}
+
+	if (defined $params{sort}) {
+		my $f;
+		if ($params{sort} eq 'title') {
+			$f=sub { pagetitle(basename($a)) cmp pagetitle(basename($b)) };
+		}
+		elsif ($params{sort} eq 'title_natural') {
+			eval q{use Sort::Naturally};
+			if ($@) {
+				error(gettext("Sort::Naturally needed for title_natural sort"));
+			}
+			$f=sub { Sort::Naturally::ncmp(pagetitle(basename($a)), pagetitle(basename($b))) };
+                }
+		elsif ($params{sort} eq 'mtime') {
+			$f=sub { $pagemtime{$b} <=> $pagemtime{$a} };
+		}
+		elsif ($params{sort} eq 'age') {
+			$f=sub { $pagectime{$b} <=> $pagectime{$a} };
+		}
+		else {
+			error sprintf(gettext("unknown sort type %s"), $params{sort});
+		}
+		@candidates = sort { &$f } @candidates;
+	}
+
+	@candidates=reverse(@candidates) if $params{reverse};
+	
+	$depends{$page}{$pagespec} |= ($params{deptype} || $DEPEND_CONTENT);
+	
+	# clear params, remainder is passed to pagespec
+	my $num=$params{num};
+	delete @params{qw{num deptype reverse sort filter list}};
+	
+	my @matches;
+	my $firstfail;
+	my $count=0;
+	my $accum=IkiWiki::SuccessReason->new();
+	foreach my $p (@candidates) {
+		my $r=$sub->($p, %params, location => $page);
+		error(sprintf(gettext("cannot match pages: %s"), $r))
+			if $r->isa("IkiWiki::ErrorReason");
+		$accum |= $r;
+		if ($r) {
+			push @matches, $p;
+			last if defined $num && ++$count == $num;
+		}
+	}
+
+	# Add simple dependencies for accumulated influences.
+	my $i=$accum->influences;
+	foreach my $k (keys %$i) {
+		$depends_simple{$page}{lc $k} |= $i->{$k};
+	}
+
+	return @matches;
+}
 
-sub pagespec_valid ($) { #{{{
+sub pagespec_valid ($) {
 	my $spec=shift;
 
 	my $sub=pagespec_translate($spec);
 	return ! $@;
-} #}}}
-	
-sub glob2re ($) { #{{{
+}
+
+sub glob2re ($) {
 	my $re=quotemeta(shift);
 	$re=~s/\\\*/.*/g;
 	$re=~s/\\\?/./g;
 	return $re;
-} #}}}
+}
 
 package IkiWiki::FailReason;
 
-use overload ( #{{{
-	'""'	=> sub { ${$_[0]} },
+use overload (
+	'""'	=> sub { $_[0][0] },
 	'0+'	=> sub { 0 },
 	'!'	=> sub { bless $_[0], 'IkiWiki::SuccessReason'},
+	'&'	=> sub { $_[0]->merge_influences($_[1], 1); $_[0] },
+	'|'	=> sub { $_[1]->merge_influences($_[0]); $_[1] },
 	fallback => 1,
-); #}}}
+);
 
-sub new { #{{{
-	my $class = shift;
-	my $value = shift;
-	return bless \$value, $class;
-} #}}}
+our @ISA = 'IkiWiki::SuccessReason';
 
 package IkiWiki::SuccessReason;
 
-use overload ( #{{{
-	'""'	=> sub { ${$_[0]} },
+use overload (
+	'""'	=> sub { $_[0][0] },
 	'0+'	=> sub { 1 },
 	'!'	=> sub { bless $_[0], 'IkiWiki::FailReason'},
+	'&'	=> sub { $_[1]->merge_influences($_[0], 1); $_[1] },
+	'|'	=> sub { $_[0]->merge_influences($_[1]); $_[0] },
 	fallback => 1,
-); #}}}
+);
 
-sub new { #{{{
+sub new {
 	my $class = shift;
 	my $value = shift;
-	return bless \$value, $class;
-}; #}}}
+	return bless [$value, {@_}], $class;
+}
+
+sub influences {
+	my $this=shift;
+	$this->[1]={@_} if @_;
+	my %i=%{$this->[1]};
+	delete $i{""};
+	return \%i;
+}
+
+sub influences_static {
+	return ! $_[0][1]->{""};
+}
+
+sub merge_influences {
+	my $this=shift;
+	my $other=shift;
+	my $anded=shift;
+
+	if (! $anded || (($this || %{$this->[1]}) &&
+	                ($other || %{$other->[1]}))) {
+		foreach my $influence (keys %{$other->[1]}) {
+			$this->[1]{$influence} |= $other->[1]{$influence};
+		}
+	}
+	else {
+		# influence blocker
+		$this->[1]={};
+	}
+}
+
+package IkiWiki::ErrorReason;
+
+our @ISA = 'IkiWiki::FailReason';
 
 package IkiWiki::PageSpec;
 
-sub match_glob ($$;@) { #{{{
+sub derel ($$) {
+	my $path=shift;
+	my $from=shift;
+
+	if ($path =~ m!^\./!) {
+		$from=~s#/?[^/]+$## if defined $from;
+		$path=~s#^\./##;
+		$path="$from/$path" if length $from;
+	}
+
+	return $path;
+}
+
+sub match_glob ($$;@) {
 	my $page=shift;
 	my $glob=shift;
 	my %params=@_;
 	
-	my $from=exists $params{location} ? $params{location} : '';
-	
-	# relative matching
-	if ($glob =~ m!^\./!) {
-		$from=~s#/?[^/]+$##;
-		$glob=~s#^\./##;
-		$glob="$from/$glob" if length $from;
-	}
+	$glob=derel($glob, $params{location});
 
 	my $regexp=IkiWiki::glob2re($glob);
 	if ($page=~/^$regexp$/i) {
@@ -1372,105 +2162,169 @@ sub match_glob ($$;@) { #{{{
 	else {
 		return IkiWiki::FailReason->new("$glob does not match $page");
 	}
-} #}}}
+}
 
-sub match_internal ($$;@) { #{{{
+sub match_internal ($$;@) {
 	return match_glob($_[0], $_[1], @_, internal => 1)
-} #}}}
+}
 
-sub match_link ($$;@) { #{{{
+sub match_link ($$;@) {
 	my $page=shift;
 	my $link=lc(shift);
 	my %params=@_;
 
+	$link=derel($link, $params{location});
 	my $from=exists $params{location} ? $params{location} : '';
 
-	# relative matching
-	if ($link =~ m!^\.! && defined $from) {
-		$from=~s#/?[^/]+$##;
-		$link=~s#^\./##;
-		$link="$from/$link" if length $from;
-	}
-
 	my $links = $IkiWiki::links{$page};
-	return IkiWiki::FailReason->new("$page has no links") unless $links && @{$links};
+	return IkiWiki::FailReason->new("$page has no links", "" => 1)
+		unless $links && @{$links};
 	my $bestlink = IkiWiki::bestlink($from, $link);
 	foreach my $p (@{$links}) {
 		if (length $bestlink) {
-			return IkiWiki::SuccessReason->new("$page links to $link")
+			return IkiWiki::SuccessReason->new("$page links to $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
 				if $bestlink eq IkiWiki::bestlink($page, $p);
 		}
 		else {
-			return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
+			return IkiWiki::SuccessReason->new("$page links to page $p matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
 				if match_glob($p, $link, %params);
+			my ($p_rel)=$p=~/^\/?(.*)/;
+			$link=~s/^\///;
+			return IkiWiki::SuccessReason->new("$page links to page $p_rel matching $link", $page => $IkiWiki::DEPEND_LINKS, "" => 1)
+				if match_glob($p_rel, $link, %params);
 		}
 	}
-	return IkiWiki::FailReason->new("$page does not link to $link");
-} #}}}
+	return IkiWiki::FailReason->new("$page does not link to $link", "" => 1);
+}
 
-sub match_backlink ($$;@) { #{{{
-	return match_link($_[1], $_[0], @_);
-} #}}}
+sub match_backlink ($$;@) {
+	my $ret=match_link($_[1], $_[0], @_);
+	$ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
+	return $ret;
+}
 
-sub match_created_before ($$;@) { #{{{
+sub match_created_before ($$;@) {
 	my $page=shift;
 	my $testpage=shift;
+	my %params=@_;
+	
+	$testpage=derel($testpage, $params{location});
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
-			return IkiWiki::SuccessReason->new("$page created before $testpage");
+			return IkiWiki::SuccessReason->new("$page created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 		else {
-			return IkiWiki::FailReason->new("$page not created before $testpage");
+			return IkiWiki::FailReason->new("$page not created before $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::FailReason->new("$testpage has no ctime");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
-} #}}}
+}
 
-sub match_created_after ($$;@) { #{{{
+sub match_created_after ($$;@) {
 	my $page=shift;
 	my $testpage=shift;
+	my %params=@_;
+	
+	$testpage=derel($testpage, $params{location});
 
 	if (exists $IkiWiki::pagectime{$testpage}) {
 		if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {
-			return IkiWiki::SuccessReason->new("$page created after $testpage");
+			return IkiWiki::SuccessReason->new("$page created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 		else {
-			return IkiWiki::FailReason->new("$page not created after $testpage");
+			return IkiWiki::FailReason->new("$page not created after $testpage", $testpage => $IkiWiki::DEPEND_PRESENCE);
 		}
 	}
 	else {
-		return IkiWiki::FailReason->new("$testpage has no ctime");
+		return IkiWiki::ErrorReason->new("$testpage does not exist", $testpage => $IkiWiki::DEPEND_PRESENCE);
 	}
-} #}}}
+}
 
-sub match_creation_day ($$;@) { #{{{
+sub match_creation_day ($$;@) {
 	if ((gmtime($IkiWiki::pagectime{shift()}))[3] == shift) {
 		return IkiWiki::SuccessReason->new('creation_day matched');
 	}
 	else {
 		return IkiWiki::FailReason->new('creation_day did not match');
 	}
-} #}}}
+}
 
-sub match_creation_month ($$;@) { #{{{
+sub match_creation_month ($$;@) {
 	if ((gmtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
 		return IkiWiki::SuccessReason->new('creation_month matched');
 	}
 	else {
 		return IkiWiki::FailReason->new('creation_month did not match');
 	}
-} #}}}
+}
 
-sub match_creation_year ($$;@) { #{{{
+sub match_creation_year ($$;@) {
 	if ((gmtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
 		return IkiWiki::SuccessReason->new('creation_year matched');
 	}
 	else {
 		return IkiWiki::FailReason->new('creation_year did not match');
 	}
-} #}}}
+}
+
+sub match_user ($$;@) {
+	shift;
+	my $user=shift;
+	my %params=@_;
+	
+	if (! exists $params{user}) {
+		return IkiWiki::ErrorReason->new("no user specified");
+	}
+
+	if (defined $params{user} && lc $params{user} eq lc $user) {
+		return IkiWiki::SuccessReason->new("user is $user");
+	}
+	elsif (! defined $params{user}) {
+		return IkiWiki::FailReason->new("not logged in");
+	}
+	else {
+		return IkiWiki::FailReason->new("user is $params{user}, not $user");
+	}
+}
+
+sub match_admin ($$;@) {
+	shift;
+	shift;
+	my %params=@_;
+	
+	if (! exists $params{user}) {
+		return IkiWiki::ErrorReason->new("no user specified");
+	}
+
+	if (defined $params{user} && IkiWiki::is_admin($params{user})) {
+		return IkiWiki::SuccessReason->new("user is an admin");
+	}
+	elsif (! defined $params{user}) {
+		return IkiWiki::FailReason->new("not logged in");
+	}
+	else {
+		return IkiWiki::FailReason->new("user is not an admin");
+	}
+}
+
+sub match_ip ($$;@) {
+	shift;
+	my $ip=shift;
+	my %params=@_;
+	
+	if (! exists $params{ip}) {
+		return IkiWiki::ErrorReason->new("no IP specified");
+	}
+
+	if (defined $params{ip} && lc $params{ip} eq lc $ip) {
+		return IkiWiki::SuccessReason->new("IP is $ip");
+	}
+	else {
+		return IkiWiki::FailReason->new("IP is $params{ip}, not $ip");
+	}
+}
 
 1