From cadeb9654c9f25f853c5bbdf9d3018d63925bdda Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@osmosoft.com>
Date: Tue, 25 Feb 2014 14:50:18 +0000
Subject: [PATCH] Add help command

---
 core/modules/commands/help.js | 41 +++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 core/modules/commands/help.js

diff --git a/core/modules/commands/help.js b/core/modules/commands/help.js
new file mode 100644
index 000000000..90c190829
--- /dev/null
+++ b/core/modules/commands/help.js
@@ -0,0 +1,41 @@
+/*\
+title: $:/core/modules/commands/help.js
+type: application/javascript
+module-type: command
+
+Help command
+
+\*/
+(function(){
+
+/*jshint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+exports.info = {
+	name: "help",
+	synchronous: true
+};
+
+var Command = function(params,commander) {
+	this.params = params;
+	this.commander = commander;
+};
+
+Command.prototype.execute = function() {
+	var subhelp = this.params[0] || "default",
+		helpBase = "$:/language/Help/",
+		text;
+	if(!this.commander.wiki.getTiddler(helpBase + subhelp)) {
+		subhelp = "notfound";
+	}
+	// Wikify the help as formatted text (ie block elements generate newlines)
+	text = this.commander.wiki.renderTiddler("text/plain-formatted",helpBase + subhelp);
+	// Remove any leading linebreaks
+	text = text.replace(/^(\r?\n)*/g,"");
+	this.commander.streams.output.write(text);
+};
+
+exports.Command = Command;
+
+})();