X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/2df0999e4033278a6cc8f6e2d00449224aa09efa..c01f53d74e2fa6a55feb01c0e0ea7a27fa1c6faf:/IkiWiki.pm?ds=inline

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 6da281999..dfe89ad32 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -14,15 +14,15 @@ use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
 	%pagestate %wikistate %renderedfiles %oldrenderedfiles
 	%pagesources %delpagesources %destsources %depends %depends_simple
 	@mass_depends %hooks %forcerebuild %loaded_plugins %typedlinks
-	%oldtypedlinks %autofiles};
+	%oldtypedlinks %autofiles @underlayfiles $lastrev $phase};
 
 use Exporter q{import};
 our @EXPORT = qw(hook debug error htmlpage template template_depends
 	deptype add_depends pagespec_match pagespec_match_list bestlink
 	htmllink readfile writefile pagetype srcfile pagename
-	displaytime will_render gettext ngettext urlto targetpage
+	displaytime strftime_utf8 will_render gettext ngettext urlto targetpage
 	add_underlay pagetitle titlepage linkpage newpagefile
-	inject add_link add_autofile
+	inject add_link add_autofile useragent
 	%config %links %pagestate %wikistate %renderedfiles
 	%pagesources %destsources %typedlinks);
 our $VERSION = 3.00; # plugin interface version, next is ikiwiki version
@@ -34,6 +34,11 @@ our $DEPEND_CONTENT=1;
 our $DEPEND_PRESENCE=2;
 our $DEPEND_LINKS=4;
 
+# Phases of processing.
+sub PHASE_SCAN () { 0 }
+sub PHASE_RENDER () { 1 }
+$phase = PHASE_SCAN;
+
 # Optimisation.
 use Memoize;
 memoize("abs2rel");
@@ -103,6 +108,14 @@ sub getsetup () {
 		safe => 1,
 		rebuild => 1,
 	},
+	reverse_proxy => {
+		type => "boolean",
+		default => 0,
+		description => "do not adjust cgiurl if CGI is accessed via different URL",
+		advanced => 0,
+		safe => 1,
+		rebuild => 0, # only affects CGI requests
+	},
 	cgi_wrapper => {
 		type => "string",
 		default => '',
@@ -118,6 +131,29 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	cgi_overload_delay => {
+		type => "string",
+		default => '',
+		example => "10",
+		description => "number of seconds to delay CGI requests when overloaded",
+		safe => 1,
+		rebuild => 0,
+	},
+	cgi_overload_message => {
+		type => "string",
+		default => '',
+		example => "Please wait",
+		description => "message to display when overloaded (may contain html)",
+		safe => 1,
+		rebuild => 0,
+	},
+	only_committed_changes => {
+		type => "boolean",
+		default => 0,
+		description => "enable optimization of only refreshing committed changes?",
+		safe => 1,
+		rebuild => 0,
+	},
 	rcs => {
 		type => "string",
 		default => '',
@@ -129,7 +165,8 @@ sub getsetup () {
 		type => "internal",
 		default => [qw{mdwn link inline meta htmlscrubber passwordauth
 				openid signinedit lockedit conditional
-				recentchanges parentlinks editpage}],
+				recentchanges parentlinks editpage
+				templatebody}],
 		description => "plugins to enable by default",
 		safe => 0,
 		rebuild => 1,
@@ -237,8 +274,8 @@ sub getsetup () {
 	html5 => {
 		type => "boolean",
 		default => 0,
-		description => "generate HTML5? (experimental)",
-		advanced => 1,
+		description => "use elements new in HTML5 like <section>?",
+		advanced => 0,
 		safe => 1,
 		rebuild => 1,
 	},
@@ -305,9 +342,9 @@ sub getsetup () {
 		rebuild => 0,
 	},
 	umask => {
-		type => "integer",
-		example => "022",
-		description => "force ikiwiki to use a particular umask",
+		type => "string",
+		example => "public",
+		description => "force ikiwiki to use a particular umask (keywords public, group or private, or a number)",
 		advanced => 1,
 		safe => 0, # paranoia
 		rebuild => 0,
@@ -336,6 +373,14 @@ sub getsetup () {
 		safe => 0, # paranoia
 		rebuild => 0,
 	},
+	timezone => {
+		type => "string", 
+		default => "",
+		example => "US/Eastern",
+		description => "time zone name",
+		safe => 1,
+		rebuild => 1,
+	},
 	include => {
 		type => "string",
 		default => undef,
@@ -477,7 +522,7 @@ sub getsetup () {
 	},
 	setuptype => {
 		type => "internal",
-		default => "Standard",
+		default => "Yaml",
 		description => "perl class to use to dump setup file",
 		safe => 0,
 		rebuild => 0,
@@ -489,6 +534,21 @@ sub getsetup () {
 		safe => 0,
 		rebuild => 0,
 	},
+	cookiejar => {
+		type => "string",
+		default => { file => "$ENV{HOME}/.ikiwiki/cookies" },
+		description => "cookie control",
+		safe => 0, # hooks into perl module internals
+		rebuild => 0,
+	},
+	useragent => {
+		type => "string",
+		default => "ikiwiki/$version",
+		example => "Wget/1.13.4 (linux-gnu)",
+		description => "set custom user agent string for outbound HTTP requests e.g. when fetching aggregated RSS feeds",
+		safe => 0,
+		rebuild => 0,
+	},
 }
 
 sub defaultconfig () {
@@ -497,10 +557,15 @@ sub defaultconfig () {
 	foreach my $key (keys %s) {
 		push @ret, $key, $s{$key}->{default};
 	}
-	use Data::Dumper;
 	return @ret;
 }
 
+# URL to top of wiki as a path starting with /, valid from any wiki page or
+# the CGI; if that's not possible, an absolute URL. Either way, it ends with /
+my $local_url;
+# URL to CGI script, similar to $local_url
+my $local_cgiurl;
+
 sub checkconfig () {
 	# locale stuff; avoid LC_ALL since it overrides everything
 	if (defined $ENV{LC_ALL}) {
@@ -523,6 +588,12 @@ sub checkconfig () {
 			$ENV{$val}=$config{ENV}{$val};
 		}
 	}
+	if (defined $config{timezone} && length $config{timezone}) {
+		$ENV{TZ}=$config{timezone};
+	}
+	else {
+		$config{timezone}=$ENV{TZ};
+	}
 
 	if ($config{w3mmode}) {
 		eval q{use Cwd q{abs_path}};
@@ -537,12 +608,81 @@ sub checkconfig () {
 	if ($config{cgi} && ! length $config{url}) {
 		error(gettext("Must specify url to wiki with --url when using --cgi"));
 	}
-	
+
+	if (defined $config{url} && length $config{url}) {
+		eval q{use URI};
+		my $baseurl = URI->new($config{url});
+
+		$local_url = $baseurl->path . "/";
+		$local_cgiurl = undef;
+
+		if (length $config{cgiurl}) {
+			my $cgiurl = URI->new($config{cgiurl});
+
+			$local_cgiurl = $cgiurl->path;
+
+			if ($cgiurl->scheme eq 'https' &&
+				$baseurl->scheme eq 'http') {
+				# We assume that the same content is available
+				# over both http and https, because if it
+				# wasn't, accessing the static content
+				# from the CGI would be mixed-content,
+				# which would be a security flaw.
+
+				if ($cgiurl->authority ne $baseurl->authority) {
+					# use protocol-relative URL for
+					# static content
+					$local_url = "$config{url}/";
+					$local_url =~ s{^http://}{//};
+				}
+				# else use host-relative URL for static content
+
+				# either way, CGI needs to be absolute
+				$local_cgiurl = $config{cgiurl};
+			}
+			elsif ($cgiurl->scheme ne $baseurl->scheme) {
+				# too far apart, fall back to absolute URLs
+				$local_url = "$config{url}/";
+				$local_cgiurl = $config{cgiurl};
+			}
+			elsif ($cgiurl->authority ne $baseurl->authority) {
+				# slightly too far apart, fall back to
+				# protocol-relative URLs
+				$local_url = "$config{url}/";
+				$local_url =~ s{^https?://}{//};
+				$local_cgiurl = $config{cgiurl};
+				$local_cgiurl =~ s{^https?://}{//};
+			}
+			# else keep host-relative URLs
+		}
+
+		$local_url =~ s{//$}{/};
+	}
+	else {
+		$local_cgiurl = $config{cgiurl};
+	}
+
 	$config{wikistatedir}="$config{srcdir}/.ikiwiki"
 		unless exists $config{wikistatedir} && defined $config{wikistatedir};
 
 	if (defined $config{umask}) {
-		umask(possibly_foolish_untaint($config{umask}));
+		my $u = possibly_foolish_untaint($config{umask});
+
+		if ($u =~ m/^\d+$/) {
+			umask($u);
+		}
+		elsif ($u eq 'private') {
+			umask(077);
+		}
+		elsif ($u eq 'group') {
+			umask(027);
+		}
+		elsif ($u eq 'public') {
+			umask(022);
+		}
+		else {
+			error(sprintf(gettext("unsupported umask setting %s"), $u));
+		}
 	}
 
 	run_hooks(checkconfig => sub { shift->() });
@@ -644,6 +784,7 @@ sub debug ($) {
 }
 
 my $log_open=0;
+my $log_failed=0;
 sub log_message ($$) {
 	my $type=shift;
 
@@ -654,9 +795,18 @@ sub log_message ($$) {
 			Sys::Syslog::openlog('ikiwiki', '', 'user');
 			$log_open=1;
 		}
-		return eval {
-			Sys::Syslog::syslog($type, "[$config{wikiname}] %s", join(" ", @_));
+		eval {
+			# keep a copy to avoid editing the original config repeatedly
+			my $wikiname = $config{wikiname};
+			utf8::encode($wikiname);
+			Sys::Syslog::syslog($type, "[$wikiname] %s", join(" ", @_));
 		};
+                if ($@) {
+                    print STDERR "failed to syslog: $@" unless $log_failed;
+                    $log_failed=1;
+                    print STDERR "@_\n";
+                }
+                return $@;
 	}
 	elsif (! $config{cgi}) {
 		return print "@_\n";
@@ -717,7 +867,7 @@ sub pagename ($) {
 
 	my $type=pagetype($file);
 	my $page=$file;
- 	$page=~s/\Q.$type\E*$//
+	$page=~s/\Q.$type\E*$//
 		if defined $type && !$hooks{htmlize}{$type}{keepextension}
 			&& !$hooks{htmlize}{$type}{noextension};
 	if ($config{indexpages} && $page=~/(.*)\/index$/) {
@@ -778,17 +928,23 @@ sub srcfile ($;$) {
 	return (srcfile_stat(@_))[0];
 }
 
-sub add_underlay ($) {
+sub add_literal_underlay ($) {
 	my $dir=shift;
 
-	if ($dir !~ /^\//) {
-		$dir="$config{underlaydirbase}/$dir";
-	}
-
 	if (! grep { $_ eq $dir } @{$config{underlaydirs}}) {
 		unshift @{$config{underlaydirs}}, $dir;
 	}
+}
 
+sub add_underlay ($) {
+	my $dir = shift;
+
+	if ($dir !~ /^\//) {
+		$dir="$config{underlaydirbase}/$dir";
+	}
+
+	add_literal_underlay($dir);
+	# why does it return 1? we just don't know
 	return 1;
 }
 
@@ -975,7 +1131,7 @@ sub bestlink ($$) {
 sub isinlinableimage ($) {
 	my $file=shift;
 	
-	return $file =~ /\.(png|gif|jpg|jpeg)$/i;
+	return $file =~ /\.(png|gif|jpg|jpeg|svg)$/i;
 }
 
 sub pagetitle ($;$) {
@@ -1010,19 +1166,30 @@ sub linkpage ($) {
 sub cgiurl (@) {
 	my %params=@_;
 
-	my $cgiurl=$config{cgiurl};
+	my $cgiurl=$local_cgiurl;
+
 	if (exists $params{cgiurl}) {
 		$cgiurl=$params{cgiurl};
 		delete $params{cgiurl};
 	}
+
+	unless (%params) {
+		return $cgiurl;
+	}
+
 	return $cgiurl."?".
 		join("&amp;", map $_."=".uri_escape_utf8($params{$_}), keys %params);
 }
 
+sub cgiurl_abs (@) {
+	eval q{use URI};
+	URI->new_abs(cgiurl(@_), $config{cgiurl});
+}
+
 sub baseurl (;$) {
 	my $page=shift;
 
-	return "$config{url}/" if ! defined $page;
+	return $local_url if ! defined $page;
 	
 	$page=htmlpage($page);
 	$page=~s/[^\/]+$//;
@@ -1030,6 +1197,16 @@ sub baseurl (;$) {
 	return $page;
 }
 
+sub urlabs ($$) {
+	my $url=shift;
+	my $urlbase=shift;
+
+	return $url unless defined $urlbase && length $urlbase;
+
+	eval q{use URI};
+	URI->new_abs($url, $urlbase)->as_string;
+}
+
 sub abs2rel ($$) {
 	# Work around very innefficient behavior in File::Spec if abs2rel
 	# is passed two relative paths. It's much faster if paths are
@@ -1065,9 +1242,19 @@ sub formattime ($;$) {
 		$format=$config{timeformat};
 	}
 
+	return strftime_utf8($format, localtime($time));
+}
+
+my $strftime_encoding;
+sub strftime_utf8 {
 	# strftime doesn't know about encodings, so make sure
-	# its output is properly treated as utf8
-	return decode_utf8(POSIX::strftime($format, localtime($time)));
+	# its output is properly treated as utf8.
+	# Note that this does not handle utf-8 in the format string.
+	($strftime_encoding) = POSIX::setlocale(&POSIX::LC_TIME) =~ m#\.([^@]+)#
+		unless defined $strftime_encoding;
+	$strftime_encoding
+		? Encode::decode($strftime_encoding, POSIX::strftime(@_))
+		: POSIX::strftime(@_);
 }
 
 sub date_3339 ($) {
@@ -1096,13 +1283,13 @@ sub beautify_urlpath ($) {
 	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}");
+		$to = 'index';
 	}
 
 	if (! $destsources{$to}) {
@@ -1113,6 +1300,12 @@ sub urlto ($$;$) {
 		return $config{url}.beautify_urlpath("/".$to);
 	}
 
+	if (! defined $from) {
+		my $u = $local_url || '';
+		$u =~ s{/$}{};
+		return $u.beautify_urlpath("/".$to);
+	}
+
 	my $link = abs2rel($to, dirname(htmlpage($from)));
 
 	return beautify_urlpath($link);
@@ -1124,7 +1317,7 @@ sub isselflink ($$) {
 	my $page=shift;
 	my $link=shift;
 
-        return $page eq $link;
+	return $page eq $link;
 }
 
 sub htmllink ($$$;@) {
@@ -1164,7 +1357,7 @@ sub htmllink ($$$;@) {
 				$cgilink = "<a href=\"".
 					cgiurl(
 						do => "create",
-						page => lc($link),
+						page => $link,
 						from => $lpage
 					)."\" rel=\"nofollow\">?</a>";
 			}
@@ -1201,7 +1394,7 @@ sub userpage ($) {
 sub openiduser ($) {
 	my $user=shift;
 
-	if ($user =~ m!^https?://! &&
+	if (defined $user && $user =~ m!^https?://! &&
 	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 		my $display;
 
@@ -1313,16 +1506,21 @@ sub preprocess ($$$;$$) {
 			# consider it significant.
 			my @params;
 			while ($params =~ m{
-				(?:([-\w]+)=)?		# 1: named parameter key?
+				(?:([-.\w]+)=)?		# 1: named parameter key?
 				(?:
 					"""(.*?)"""	# 2: triple-quoted value
 				|
 					"([^"]*?)"	# 3: single-quoted value
 				|
-					(\S+)		# 4: unquoted value
+					'''(.*?)'''     # 4: triple-single-quote
+				|
+					<<([a-zA-Z]+)\n # 5: heredoc start
+					(.*?)\n\5	# 6: heredoc value
+				|
+					(\S+)		# 7: unquoted value
 				)
 				(?:\s+|$)		# delimiter to next param
-			}sgx) {
+			}msgx) {
 				my $key=$1;
 				my $val;
 				if (defined $2) {
@@ -1337,6 +1535,12 @@ sub preprocess ($$$;$$) {
 				elsif (defined $4) {
 					$val=$4;
 				}
+				elsif (defined $7) {
+					$val=$7;
+				}
+				elsif (defined $6) {
+					$val=$6;
+				}
 
 				if (defined $key) {
 					push @params, $key, $val;
@@ -1345,7 +1549,7 @@ sub preprocess ($$$;$$) {
 					push @params, $val, '';
 				}
 			}
-			if ($preprocessing{$page}++ > 3) {
+			if ($preprocessing{$page}++ > 8) {
 				# Avoid loops of preprocessed pages preprocessing
 				# other pages that preprocess them, etc.
 				return "[[!$command <span class=\"error\">".
@@ -1399,12 +1603,17 @@ sub preprocess ($$$;$$) {
 			(		# 4: the parameters..
 				\s+	# Must have space if parameters present
 				(?:
-					(?:[-\w]+=)?		# named parameter key?
+					(?:[-.\w]+=)?		# named parameter key?
 					(?:
 						""".*?"""	# triple-quoted value
 						|
 						"[^"]*?"	# single-quoted value
 						|
+						'''.*?'''	# triple-single-quote
+						|
+						<<([a-zA-Z]+)\n # 5: heredoc start
+						(?:.*?)\n\5	# heredoc value
+						|
 						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
@@ -1422,12 +1631,17 @@ sub preprocess ($$$;$$) {
 			\s+
 			(		# 4: the parameters..
 				(?:
-					(?:[-\w]+=)?		# named parameter key?
+					(?:[-.\w]+=)?		# named parameter key?
 					(?:
 						""".*?"""	# triple-quoted value
 						|
 						"[^"]*?"	# single-quoted value
 						|
+						'''.*?'''       # triple-single-quote
+						|
+						<<([a-zA-Z]+)\n # 5: heredoc start
+						(?:.*?)\n\5	# heredoc value
+						|
 						[^"\s\]]+	# unquoted value
 					)
 					\s*			# whitespace or end
@@ -1519,6 +1733,69 @@ sub check_content (@) {
 	return defined $ok ? $ok : 1;
 }
 
+sub check_canchange (@) {
+	my %params = @_;
+	my $cgi = $params{cgi};
+	my $session = $params{session};
+	my @changes = @{$params{changes}};
+
+	my %newfiles;
+	foreach my $change (@changes) {
+		# This untaint is safe because we check file_pruned and
+		# wiki_file_regexp.
+		my ($file)=$change->{file}=~/$config{wiki_file_regexp}/;
+		$file=possibly_foolish_untaint($file);
+		if (! defined $file || ! length $file ||
+		    file_pruned($file)) {
+			error(gettext("bad file name %s"), $file);
+		}
+
+		my $type=pagetype($file);
+		my $page=pagename($file) if defined $type;
+
+		if ($change->{action} eq 'add') {
+			$newfiles{$file}=1;
+		}
+
+		if ($change->{action} eq 'change' ||
+		    $change->{action} eq 'add') {
+			if (defined $page) {
+				check_canedit($page, $cgi, $session);
+				next;
+			}
+			else {
+				if (IkiWiki::Plugin::attachment->can("check_canattach")) {
+					IkiWiki::Plugin::attachment::check_canattach($session, $file, $change->{path});
+					check_canedit($file, $cgi, $session);
+					next;
+				}
+			}
+		}
+		elsif ($change->{action} eq 'remove') {
+			# check_canremove tests to see if the file is present
+			# on disk. This will fail when a single commit adds a
+			# file and then removes it again. Avoid the problem
+			# by not testing the removal in such pairs of changes.
+			# (The add is still tested, just to make sure that
+			# no data is added to the repo that a web edit
+			# could not add.)
+			next if $newfiles{$file};
+
+			if (IkiWiki::Plugin::remove->can("check_canremove")) {
+				IkiWiki::Plugin::remove::check_canremove(defined $page ? $page : $file, $cgi, $session);
+				check_canedit(defined $page ? $page : $file, $cgi, $session);
+				next;
+			}
+		}
+		else {
+			error "unknown action ".$change->{action};
+		}
+
+		error sprintf(gettext("you are not allowed to change %s"), $file);
+	}
+}
+
+
 my $wikilock;
 
 sub lockwiki () {
@@ -1570,7 +1847,8 @@ sub enable_commit_hook () {
 
 sub loadindex () {
 	%oldrenderedfiles=%pagectime=();
-	if (! $config{rebuild}) {
+	my $rebuild=$config{rebuild};
+	if (! $rebuild) {
 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
 		%destsources=%renderedfiles=%pagecase=%pagestate=
 		%depends_simple=%typedlinks=%oldtypedlinks=();
@@ -1582,7 +1860,8 @@ sub loadindex () {
 			open ($in, "<", "$config{wikistatedir}/indexdb") || return;
 		}
 		else {
-			$config{gettime}=1; # first build
+			# gettime on first build
+			$config{gettime}=1 unless defined $config{gettime};
 			return;
 		}
 	}
@@ -1610,10 +1889,16 @@ sub loadindex () {
 
 	foreach my $src (keys %$pages) {
 		my $d=$pages->{$src};
-		my $page=pagename($src);
+		my $page;
+		if (exists $d->{page} && ! $rebuild) {
+			$page=$d->{page};
+		}
+		else {
+			$page=pagename($src);
+		}
 		$pagectime{$page}=$d->{ctime};
 		$pagesources{$page}=$src;
-		if (! $config{rebuild}) {
+		if (! $rebuild) {
 			$pagemtime{$page}=$d->{mtime};
 			$renderedfiles{$page}=$d->{dest};
 			if (exists $d->{links} && ref $d->{links}) {
@@ -1663,6 +1948,8 @@ sub loadindex () {
 	foreach my $page (keys %renderedfiles) {
 		$destsources{$_}=$page foreach @{$renderedfiles{$page}};
 	}
+	$lastrev=$index->{lastrev};
+	@underlayfiles=@{$index->{underlayfiles}} if ref $index->{underlayfiles};
 	return close($in);
 }
 
@@ -1684,6 +1971,7 @@ sub saveindex () {
 		my $src=$pagesources{$page};
 
 		$index{page}{$src}={
+			page => $page,
 			ctime => $pagectime{$page},
 			mtime => $pagemtime{$page},
 			dest => $renderedfiles{$page},
@@ -1703,11 +1991,7 @@ sub saveindex () {
 		}
 
 		if (exists $pagestate{$page}) {
-			foreach my $id (@plugins) {
-				foreach my $key (keys %{$pagestate{$page}{$id}}) {
-					$index{page}{$src}{state}{$id}{$key}=$pagestate{$page}{$id}{$key};
-				}
-			}
+			$index{page}{$src}{state}=$pagestate{$page};
 		}
 	}
 
@@ -1719,6 +2003,9 @@ sub saveindex () {
 		}
 	}
 	
+	$index{lastrev}=$lastrev;
+	$index{underlayfiles}=\@underlayfiles;
+
 	$index{version}="3";
 	my $ret=Storable::nstore_fd(\%index, $out);
 	return if ! defined $ret || ! $ret;
@@ -1769,19 +2056,30 @@ sub template_depends ($$;@) {
 	my $page=shift;
 	
 	my ($filename, $tpage, $untrusted)=template_file($name);
+	if (! defined $filename) {
+		error(sprintf(gettext("template %s not found"), $name))
+	}
+
 	if (defined $page && defined $tpage) {
 		add_depends($page, $tpage);
 	}
 
-	return unless defined $filename;
-
 	my @opts=(
 		filter => sub {
 			my $text_ref = shift;
 			${$text_ref} = decode_utf8(${$text_ref});
+			run_hooks(readtemplate => sub {
+				${$text_ref} = shift->(
+					id => $name,
+					page => $tpage,
+					content => ${$text_ref},
+					untrusted => $untrusted,
+				);
+			});
 		},
 		loop_context_vars => 1,
 		die_on_bad_params => 0,
+		parent_global_vars => 1,
 		filename => $filename,
 		@_,
 		($untrusted ? (no_includes => 1) : ()),
@@ -1796,39 +2094,6 @@ sub template ($;@) {
 	template_depends(shift, undef, @_);
 }
 
-sub misctemplate ($$;@) {
-	my $title=shift;
-	my $content=shift;
-	my %params=@_;
-	
-	my $template=template("page.tmpl");
-
-	my $page="";
-	if (exists $params{page}) {
-		$page=delete $params{page};
-	}
-	run_hooks(pagetemplate => sub {
-		shift->(
-			page => $page,
-			destpage => $page,
-			template => $template,
-		);
-	});
-	templateactions($template, "");
-
-	$template->param(
-		dynamic => 1,
-		title => $title,
-		wikiname => $config{wikiname},
-		content => $content,
-		baseurl => baseurl(),
-		html5 => $config{html5},
-		%params,
-	);
-	
-	return $template->output;
-}
-
 sub templateactions ($$) {
 	my $template=shift;
 	my $page=shift;
@@ -1923,7 +2188,7 @@ sub rcs_recentchanges ($) {
 	$hooks{rcs}{rcs_recentchanges}{call}->(@_);
 }
 
-sub rcs_diff ($) {
+sub rcs_diff ($;$) {
 	$hooks{rcs}{rcs_diff}{call}->(@_);
 }
 
@@ -2100,6 +2365,14 @@ sub add_autofile ($$$) {
 	$autofiles{$file}{generator}=$generator;
 }
 
+sub useragent () {
+	return LWP::UserAgent->new(
+		cookie_jar => $config{cookiejar},
+		env_proxy => 1,		# respect proxy env vars
+		agent => $config{useragent},
+	);
+}
+
 sub sortspec_translate ($$) {
 	my $spec = shift;
 	my $reverse = shift;
@@ -2236,6 +2509,19 @@ sub pagespec_match ($$;@) {
 	return $sub->($page, @params);
 }
 
+# e.g. @pages = sort_pages("title", \@pages, reverse => "yes")
+#
+# Not exported yet, but could be in future if it is generally useful.
+# Note that this signature is not the same as IkiWiki::SortSpec::sort_pages,
+# which is "more internal".
+sub sort_pages ($$;@) {
+	my $sort = shift;
+	my $list = shift;
+	my %params = @_;
+	$sort = sortspec_translate($sort, $params{reverse});
+	return IkiWiki::SortSpec::sort_pages($sort, @$list);
+}
+
 sub pagespec_match_list ($$;@) {
 	my $page=shift;
 	my $pagespec=shift;
@@ -2323,7 +2609,7 @@ sub glob2re ($) {
 	my $re=quotemeta(shift);
 	$re=~s/\\\*/.*/g;
 	$re=~s/\\\?/./g;
-	return $re;
+	return qr/^$re$/i;
 }
 
 package IkiWiki::FailReason;
@@ -2341,21 +2627,48 @@ our @ISA = 'IkiWiki::SuccessReason';
 
 package IkiWiki::SuccessReason;
 
+# A blessed array-ref:
+#
+# [0]: human-readable reason for success (or, in FailReason subclass, failure)
+# [1]{""}:
+#      - if absent or false, the influences of this evaluation are "static",
+#        see the influences_static method
+#      - if true, they are dynamic (not static)
+# [1]{any other key}:
+#      the dependency types of influences, as returned by the influences method
+
 use overload (
+	# in string context, it's the human-readable reason
 	'""'	=> sub { $_[0][0] },
+	# in boolean context, SuccessReason is 1 and FailReason is 0
 	'0+'	=> sub { 1 },
+	# negating a result gives the opposite result with the same influences
 	'!'	=> sub { bless $_[0], 'IkiWiki::FailReason'},
+	# A & B = (A ? B : A) with the influences of both
 	'&'	=> sub { $_[1]->merge_influences($_[0], 1); $_[1] },
+	# A | B = (A ? A : B) with the influences of both
 	'|'	=> sub { $_[0]->merge_influences($_[1]); $_[0] },
 	fallback => 1,
 );
 
+# SuccessReason->new("human-readable reason", page => deptype, ...)
+
 sub new {
 	my $class = shift;
 	my $value = shift;
 	return bless [$value, {@_}], $class;
 }
 
+# influences(): return a reference to a copy of the hash
+# { page => dependency type } describing the pages that indirectly influenced
+# this result, but would not cause a dependency through ikiwiki's core
+# dependency logic.
+#
+# See [[todo/dependency_types]] for extensive discussion of what this means.
+#
+# influences(page => deptype, ...): remove all influences, replace them
+# with the arguments, and return a reference to a copy of the new influences.
+
 sub influences {
 	my $this=shift;
 	$this->[1]={@_} if @_;
@@ -2364,15 +2677,46 @@ sub influences {
 	return \%i;
 }
 
+# True if this result has the same influences whichever page it matches,
+# For instance, whether bar matches backlink(foo) is influenced only by
+# the set of links in foo, so its only influence is { foo => DEPEND_LINKS },
+# which does not mention bar anywhere.
+#
+# False if this result would have different influences when matching
+# different pages. For instance, when testing whether link(foo) matches bar,
+# { bar => DEPEND_LINKS } is an influence on that result, because changing
+# bar's links could change the outcome; so its influences are not the same
+# as when testing whether link(foo) matches baz.
+#
+# Static influences are one of the things that make pagespec_match_list
+# more efficient than repeated calls to pagespec_match.
+
 sub influences_static {
 	return ! $_[0][1]->{""};
 }
 
+# Change the influences of $this to be the influences of "$this & $other"
+# or "$this | $other".
+#
+# If both $this and $other are either successful or have influences,
+# or this is an "or" operation, the result has all the influences from
+# either of the arguments. It has dynamic influences if either argument
+# has dynamic influences.
+#
+# If this is an "and" operation, and at least one argument is a
+# FailReason with no influences, the result has no influences, and they
+# are not dynamic. For instance, link(foo) matching bar is influenced
+# by bar, but enabled(ddate) has no influences. Suppose ddate is disabled;
+# then (link(foo) and enabled(ddate)) not matching bar is not influenced by
+# bar, because it would be false however often you edit bar.
+
 sub merge_influences {
 	my $this=shift;
 	my $other=shift;
 	my $anded=shift;
 
+	# This "if" is odd because it needs to avoid negating $this
+	# or $other, which would alter the objects in-place. Be careful.
 	if (! $anded || (($this || %{$this->[1]}) &&
 	                 ($other || %{$other->[1]}))) {
 		foreach my $influence (keys %{$other->[1]}) {
@@ -2385,6 +2729,8 @@ sub merge_influences {
 	}
 }
 
+# Change $this so it is not considered to be influenced by $torm.
+
 sub remove_influence {
 	my $this=shift;
 	my $torm=shift;
@@ -2417,6 +2763,8 @@ sub derel ($$) {
 	return $path;
 }
 
+my %glob_cache;
+
 sub match_glob ($$;@) {
 	my $page=shift;
 	my $glob=shift;
@@ -2424,8 +2772,13 @@ sub match_glob ($$;@) {
 	
 	$glob=derel($glob, $params{location});
 
-	my $regexp=IkiWiki::glob2re($glob);
-	if ($page=~/^$regexp$/i) {
+	# Instead of converting the glob to a regex every time,
+	# cache the compiled regex to save time.
+	my $re=$glob_cache{$glob};
+	unless (defined $re) {
+		$glob_cache{$glob} = $re = IkiWiki::glob2re($glob);
+	}
+	if ($page =~ $re) {
 		if (! IkiWiki::isinternal($page) || $params{internal}) {
 			return IkiWiki::SuccessReason->new("$glob matches $page");
 		}
@@ -2497,8 +2850,14 @@ sub match_link ($$;@) {
 }
 
 sub match_backlink ($$;@) {
-	my $ret=match_link($_[1], $_[0], @_);
-	$ret->influences($_[1] => $IkiWiki::DEPEND_LINKS);
+	my $page=shift;
+	my $testpage=shift;
+	my %params=@_;
+	if ($testpage eq '.') {
+		$testpage = $params{'location'}
+	}
+	my $ret=match_link($testpage, $page, @_);
+	$ret->influences($testpage => $IkiWiki::DEPEND_LINKS);
 	return $ret;
 }
 
@@ -2543,7 +2902,12 @@ sub match_created_after ($$;@) {
 }
 
 sub match_creation_day ($$;@) {
-	if ((localtime($IkiWiki::pagectime{shift()}))[3] == shift) {
+	my $page=shift;
+	my $d=shift;
+	if ($d !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid day $d");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[3] == $d) {
 		return IkiWiki::SuccessReason->new('creation_day matched');
 	}
 	else {
@@ -2552,7 +2916,12 @@ sub match_creation_day ($$;@) {
 }
 
 sub match_creation_month ($$;@) {
-	if ((localtime($IkiWiki::pagectime{shift()}))[4] + 1 == shift) {
+	my $page=shift;
+	my $m=shift;
+	if ($m !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid month $m");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[4] + 1 == $m) {
 		return IkiWiki::SuccessReason->new('creation_month matched');
 	}
 	else {
@@ -2561,7 +2930,12 @@ sub match_creation_month ($$;@) {
 }
 
 sub match_creation_year ($$;@) {
-	if ((localtime($IkiWiki::pagectime{shift()}))[5] + 1900 == shift) {
+	my $page=shift;
+	my $y=shift;
+	if ($y !~ /^\d+$/) {
+		return IkiWiki::ErrorReason->new("invalid year $y");
+	}
+	if ((localtime($IkiWiki::pagectime{$page}))[5] + 1900 == $y) {
 		return IkiWiki::SuccessReason->new('creation_year matched');
 	}
 	else {
@@ -2574,13 +2948,13 @@ sub match_user ($$;@) {
 	my $user=shift;
 	my %params=@_;
 	
-	my $regexp=IkiWiki::glob2re($user);
-	
 	if (! exists $params{user}) {
 		return IkiWiki::ErrorReason->new("no user specified");
 	}
 
-	if (defined $params{user} && $params{user}=~/^$regexp$/i) {
+	my $regexp=IkiWiki::glob2re($user);
+	
+	if (defined $params{user} && $params{user}=~$regexp) {
 		return IkiWiki::SuccessReason->new("user is $user");
 	}
 	elsif (! defined $params{user}) {
@@ -2619,8 +2993,10 @@ sub match_ip ($$;@) {
 	if (! exists $params{ip}) {
 		return IkiWiki::ErrorReason->new("no IP specified");
 	}
+	
+	my $regexp=IkiWiki::glob2re(lc $ip);
 
-	if (defined $params{ip} && lc $params{ip} eq lc $ip) {
+	if (defined $params{ip} && lc $params{ip}=~$regexp) {
 		return IkiWiki::SuccessReason->new("IP is $ip");
 	}
 	else {
@@ -2643,6 +3019,7 @@ sub cmp_title {
 	IkiWiki::pagetitle(IkiWiki::basename($b))
 }
 
+sub cmp_path { IkiWiki::pagetitle($a) cmp IkiWiki::pagetitle($b) }
 sub cmp_mtime { $IkiWiki::pagemtime{$b} <=> $IkiWiki::pagemtime{$a} }
 sub cmp_age { $IkiWiki::pagectime{$b} <=> $IkiWiki::pagectime{$a} }