web commit by FaidonLiambotis: Add HTML Tidy plugin to patchqueue

doc/patchqueue/html_tidy_plugin.mdwn

@@ -0,0 +1,38 @@
+Obvious and straightforward ;-)
+tidy should be probably added to Suggests -- doc/ikiwiki.setup should also be updated.  
+(yes, I'm too lazy today...)
+
+-- [[Faidon]]
+
+---
+
+	#!/usr/bin/perl
+	# HTML Tidy plugin
+	# requires 'tidy' binary, found in Debian or http://tidy.sf.net/
+	# mostly a proof-of-concept on how to use external filters.
+	# It is particularly useful when the html plugin is used.
+	package IkiWiki::Plugin::tidy;
+	
+	use warnings;
+	use strict;
+	use IkiWiki;
+	use IPC::Open2;
+	
+	sub import { #{{{
+		IkiWiki::hook(type => "sanitize", id => "tidy", call => \&sanitize);
+	} # }}}
+	
+	sub sanitize ($) { #{{{
+		open2(*IN, *OUT, 'tidy -quiet -xml -indent -utf8') or return shift;
+		# open2 doesn't respect "use open ':utf8'"
+		binmode (IN, ':utf8'); 
+		binmode (OUT, ':utf8'); 
+	
+		print OUT shift;
+		close OUT;
+	
+		local $/ = undef;
+		return <IN>;
+	} # }}}
+	
+	1