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+++ b/plugins/supported/jslint_command.js
@@ -0,0 +1,104 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Bespin.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Bespin Team (bespin@mozilla.com)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+"define metadata";
+({
+    "dependencies": { "jslint": "0.0.0" },
+    "description": "Provides the JSLint command to check code for errors.",
+    "objects": [],
+    "provides": [
+        {
+            "ep": "command",
+            "name": "jslint",
+            "params": [],
+            "description": "Run JSLint to check the current file",
+            "pointer": "#jslintCommand",
+            "predicates": { "context": "js" }
+        }
+    ]
+});
+"end";
+
+var env = require('environment').env;
+var jslint = require('jslint').jslint;
+
+function runJSLint(model) {
+    var ok = jslint(model.getValue());
+    if (ok) {
+        return "JSLint succeeded";
+    }
+
+    var errors = jslint.errors;
+    var plural = (errors.length === 1) ? "" : "s";
+    var output = [ "<div>JSLint reported ", errors.length, " error", plural,
+        ":</div>" ];
+
+    errors.forEach(function(err) {
+        if (err == null) {
+            return;
+        }
+
+        output.push("<div>");
+        output.push(err.line);
+        output.push(":");
+        output.push(err.character);
+        output.push(": ");
+        output.push(err.reason);
+        output.push("</div>");
+
+        var line = model.lines[err.line - 1];
+        var character = err.character - 1;
+        line = line.replace(/</g, "&lt;").replace(/\t/g, "    ");
+
+        output.push("<pre>");
+        output.push(line);
+        output.push("\n");
+        for (var i = 0; i < character; i++) {
+            output.push(".");
+        }
+        output.push('^</pre>');
+    });
+
+    return output.join("");
+}
+
+exports.jslintCommand = function(args, req) {
+    req.done(runJSLint(env.model));
+}
+
+exports.runJSLint = runJSLint;
+