+sub add_depends ($$;$) {
+ my $page=shift;
+ my $pagespec=shift;
+ my $deptype=shift || $DEPEND_CONTENT;
+
+ # Is the pagespec a simple page name?
+ if ($pagespec =~ /$config{wiki_file_regexp}/ &&
+ $pagespec !~ /[\s*?()!]/) {
+ $depends_simple{$page}{lc $pagespec} |= $deptype;
+ return 1;
+ }
+
+ # Analyse the pagespec, and match it against all pages
+ # to get a list of influences, and add explicit dependencies
+ # for those.
+ #my $sub=pagespec_translate($pagespec);
+ #return if $@;
+ #foreach my $p (keys %pagesources) {
+ # my $r=$sub->($p, location => $page );
+ # my %i=$r->influences;
+ # foreach my $i (keys %i) {
+ # $depends_simple{$page}{lc $i} |= $i{$i};
+ # }
+ #}
+ print STDERR "warning: use of add_depends; influences not tracked\n";
+
+ $depends{$page}{$pagespec} |= $deptype;
+ return 1;
+}
+
+sub use_pagespec ($$;@) {
+ my $page=shift;
+ my $pagespec=shift;
+ my %params=@_;
+
+ my $sub=pagespec_translate($pagespec);
+ error "syntax error in pagespec \"$pagespec\""
+ if $@ || ! defined $sub;
+
+ my @candidates;
+ if (exists $params{limit}) {
+ @candidates=grep { $params{limit}->($_) } keys %pagesources;
+ }
+ else {
+ @candidates=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} };