Refactor plugin a bit.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/plugin.js

@@ -65,25 +65,25 @@ cmd.handler = function(argv) {
   if (plugins.length === 0) return log.error('Plugin not found!');
 
   var plugin = plugins[0];
-  var oldname = h.getPluginFile(plugin.file);
+  var fullpath = h.getPluginFile(plugin.file);
   var newname;
 
   if (argv.enable) {
-    if (plugin.file[0] !== '.') return;
+    if (plugin.enabled) return;
     newname = h.getPluginFile(plugin.file.substr(1));
 
-    fs.rename(oldname, newname, function(e) {
+    fs.rename(fullpath, newname, function(e) {
       if (e) log.error(e.message);
     });
   } else if (argv.disable) {
-    if (plugin.file[0] === '.') return;
+    if (!plugin.enabled) return;
     newname = h.getPluginFile('.' + plugin.file);
 
-    fs.rename(oldname, newname, function(e) {
+    fs.rename(fullpath, newname, function(e) {
       if (e) log.error(e.message);
     });
   } else if (argv.delete) {
-    fs.unlink(oldname, function(e) {
+    fs.unlink(fullpath, function(e) {
       if (e) log.error(e.message);
     });
   } else if (argv.config) {