+ GetOptions("tagbase=s" => \$config{tagbase});
+}
+
+sub getsetup () {
+ return
+ plugin => {
+ safe => 1,
+ rebuild => undef,
+ },
+ tagbase => {
+ type => "string",
+ example => "tag",
+ description => "parent page tags are located under",
+ safe => 1,
+ rebuild => 1,
+ },
+ tag_autocreate => {
+ type => "boolean",
+ example => 1,
+ description => "autocreate new tag pages?",
+ safe => 1,
+ rebuild => undef,
+ },
+}
+
+sub taglink ($) {
+ my $tag=shift;
+
+ if ($tag !~ m{^/} &&
+ defined $config{tagbase}) {
+ $tag="/".$config{tagbase}."/".$tag;
+ $tag=~y#/#/#s; # squash dups
+ }
+
+ return $tag;
+}
+
+# Returns a tag name from a tag link
+sub tagname ($) {
+ my $tag=shift;
+ if (defined $config{tagbase}) {
+ $tag =~ s!^/\Q$config{tagbase}\E/!!;
+ } else {
+ $tag =~ s!^\.?/!!;
+ }
+ return pagetitle($tag, 1);
+}
+
+sub htmllink_tag ($$$;@) {
+ my $page=shift;
+ my $destpage=shift;
+ my $tag=shift;
+ my %opts=@_;
+
+ return htmllink($page, $destpage, taglink($tag), %opts);
+}
+
+sub gentag ($) {
+ my $tag=shift;
+
+ if ($config{tag_autocreate} ||
+ ($config{tagbase} && ! defined $config{tag_autocreate})) {
+ my $tagpage=taglink($tag);
+ if ($tagpage=~/^\.\/(.*)/) {
+ $tagpage=$1;
+ }
+ else {
+ $tagpage=~s/^\///;
+ }
+
+ my $tagfile = newpagefile($tagpage, $config{default_pageext});
+
+ add_autofile($tagfile, "tag", sub {
+ my $message=sprintf(gettext("creating tag page %s"), $tagpage);
+ debug($message);
+
+ my $template=template("autotag.tmpl");
+ $template->param(tagname => tagname($tag));
+ $template->param(tag => $tag);
+ writefile($tagfile, $config{srcdir}, $template->output);
+ if ($config{rcs}) {
+ IkiWiki::disable_commit_hook();
+ IkiWiki::rcs_add($tagfile);
+ IkiWiki::rcs_commit_staged(message => $message);
+ IkiWiki::enable_commit_hook();
+ }
+ });
+ }
+}