Add quick switch for replacing old wikitext parser with the new

core/boot.js

@@ -35,6 +35,9 @@ if(typeof(window) === "undefined" && !global.$tw) {
 	global.$tw = {}; // No ``browser`` member for the server
 }
 
+// Temporary switch for replacing the old wiki text parser with the new one
+$tw.useNewParser = false;
+
 // Boot information
 $tw.boot = {};
 

core/modules/parsers/newwikitextparser/newwikitextparser.js

@@ -180,6 +180,6 @@ WikiTextParser.prototype.parse = function(type,text) {
 	});
 };
 
-exports["text/x-tiddlywiki-new"] = WikiTextParser;
+exports[$tw.useNewParser ? "text/x-tiddlywiki" : "text/x-tiddlywiki-new"] = WikiTextParser;
 
 })();

core/modules/parsers/wikitextparser/wikitextparser.js

@@ -182,6 +182,6 @@ WikiTextParser.prototype.subWikifyTerm = function(output,terminatorRegExp) {
 	this.output = oldOutput;
 };
 
-exports["text/x-tiddlywiki"] = WikiTextParser;
+exports[$tw.useNewParser ? "text/x-tiddlywiki-old" : "text/x-tiddlywiki"] = WikiTextParser;
 
 })();

core/modules/wiki.js

@@ -253,7 +253,7 @@ exports.initParsers = function(moduleType) {
 		}
 	}
 	// Install the rules for the old wikitext parser rules
-	var wikitextparser = this.parsers["text/x-tiddlywiki"];
+	var wikitextparser = this.parsers[$tw.useNewParser ? "text/x-tiddlywiki-old" : "text/x-tiddlywiki"];
 	if(modules && wikitextparser) {
 		wikitextparser.installRules();
 	}