make sure missing emmet can't break tab key

lib/ace/ext/emmet.js

@@ -342,29 +342,29 @@ var keymap = {
 var editorProxy = new AceEmmetEditor();
 exports.commands = new HashHandler();
 exports.runEmmetCommand = function(editor) {
-    editorProxy.setupContext(editor);
-    if (editorProxy.getSyntax() == "php")
-        return false;
-    var actions = emmet.require("actions");
-
-    if (this.action == "expand_abbreviation_with_tab") {
-        if (!editor.selection.isEmpty())
-            return false;
-    }
-    
-    if (this.action == "wrap_with_abbreviation") {
-        // without setTimeout prompt doesn't work on firefox
-        return setTimeout(function() {
-            actions.run("wrap_with_abbreviation", editorProxy);
-        }, 0);
-    }
-    
-    var pos = editor.selection.lead;
-    var token = editor.session.getTokenAt(pos.row, pos.column);
-    if (token && /\btag\b/.test(token.type))
-        return false;
-    
     try {
+        editorProxy.setupContext(editor);
+        if (editorProxy.getSyntax() == "php")
+            return false;
+        var actions = emmet.require("actions");
+    
+        if (this.action == "expand_abbreviation_with_tab") {
+            if (!editor.selection.isEmpty())
+                return false;
+        }
+        
+        if (this.action == "wrap_with_abbreviation") {
+            // without setTimeout prompt doesn't work on firefox
+            return setTimeout(function() {
+                actions.run("wrap_with_abbreviation", editorProxy);
+            }, 0);
+        }
+        
+        var pos = editor.selection.lead;
+        var token = editor.session.getTokenAt(pos.row, pos.column);
+        if (token && /\btag\b/.test(token.type))
+            return false;
+        
         var result = actions.run(this.action, editorProxy);
     } catch(e) {
         editor._signal("changeStatus", typeof e == "string" ? e : e.message);
@@ -393,7 +393,7 @@ exports.updateCommands = function(editor, enabled) {
 };
 
 exports.isSupportedMode = function(modeId) {
-    return modeId && /css|less|scss|sass|stylus|html|php|twig/.test(modeId);
+    return modeId && /css|less|scss|sass|stylus|html|php|twig|ejs/.test(modeId);
 };
 
 var onChangeMode = function(e, target) {
@@ -406,9 +406,8 @@ var onChangeMode = function(e, target) {
     if (enabled) {
         if (typeof emmetPath == "string") {
             require("ace/config").loadModule(emmetPath, function() {
-                
+                emmetPath = null;
             });
-            emmetPath = null;
         }
     }
     exports.updateCommands(editor, enabled);