1 files changed, 90 insertions, 0 deletions
diff --git a/IkiWiki/Plugin/listpreprocessors.pm b/IkiWiki/Plugin/listpreprocessors.pm
new file mode 100644
index 000000000..ae5e1a7c4
--- /dev/null
+++ b/IkiWiki/Plugin/listpreprocessors.pm
@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+# Ikiwiki listpreprocessors plugin.
+package IkiWiki::Plugin::listpreprocessors;
+
+use warnings;
+use strict;
+use IkiWiki 2.00;
+
+sub import { #{{{
+	hook(type => "getsetup", id => "listpreprocessors", call => \&getsetup);
+	hook(type => "checkconfig", id => "listpreprocessors", call => \&checkconfig);
+	hook(type => "needsbuild", id => "listpreprocessors", call => \&needsbuild);
+	hook(type => "preprocess", id => "listpreprocessors", call => \&preprocess);
+} # }}}
+
+sub getsetup () { #{{{
+	return
+		plugin => {
+			safe => 1,
+			rebuild => undef,
+		},
+		preprocessor_description_dir => {
+			type => "string",
+			description => "The ikiwiki directory that contains plugin descriptions.",
+			safe => 1,
+			rebuild => 1,
+		},
+} #}}}
+
+my @fullPluginList;
+my @earlyPluginList;
+my $pluginString;
+
+sub checkconfig () { #{{{
+    if (!defined $config{plugin_description_dir}) {
+        $config{plugin_description_dir} = "ikiwiki/plugin/";
+    }
+
+    @earlyPluginList = sort( keys %{ $IkiWiki::hooks{preprocess} } );
+} #}}}
+
+sub needsbuild (@) { #{{{
+	my $needsbuild=shift;
+
+	@fullPluginList = sort( keys %{ $IkiWiki::hooks{preprocess} } );
+	$pluginString = join (' ', @earlyPluginList) . " : ". join (' ', @fullPluginList);
+
+	foreach my $page (keys %pagestate) {
+		if (exists $pagestate{$page}{listpreprocessors}{shown}) {
+			if ($pagestate{$page}{listpreprocessors}{shown} ne $pluginString) {
+				push @$needsbuild, $pagesources{$page};
+			}
+			if (exists $pagesources{$page} &&
+					grep { $_ eq $pagesources{$page} } @$needsbuild) {
+				# remove state, will be re-added if
+				# the [[!listpreprocessors]] is still there during the
+				# rebuild
+				delete $pagestate{$page}{listpreprocessors}{shown};
+			}
+		}
+	}
+} # }}}
+
+sub preprocess (@) { #{{{
+	my %params=@_;
+	
+	$pagestate{$params{destpage}}{listpreprocessors}{shown}=$pluginString;
+	
+	my @pluginlist;
+	
+	if (defined $params{generated}) {
+		@pluginlist = @fullPluginList;
+	} else {
+		@pluginlist = @earlyPluginList;
+	}
+	
+	my $result = '<ul class="listpreprocessors">';
+	
+	foreach my $plugin (@pluginlist) {
+		$result .= '<li class="listpreprocessors">';
+		$result .= htmllink($params{page}, $params{destpage}, IkiWiki::linkpage($config{plugin_description_dir} . $plugin));
+		$result .= '</li>';
+	}
+	
+	$result .= "</ul>";
+
+	return $result;
+} # }}}
+
+1