Added --treeless flag for disabling directory listings (vercel#261)

Author: javilobo8

lib/options.js

@@ -45,6 +45,11 @@ exports.options = [
     name: 'open',
     description: 'Open local address in browser',
     defaultValue: false
+  },
+  {
+    name: 'treeless',
+    description: `Don't display statics tree`,
+    defaultValue: false
   }
 ]
 
@@ -56,7 +61,17 @@ exports.minimist = {
     s: 'single',
     u: 'unzipped',
     n: 'clipless',
-    o: 'open'
+    o: 'open',
+    t: 'treeless'
   },
-  boolean: ['auth', 'cors', 'silent', 'single', 'unzipped', 'clipless', 'open']
+  boolean: [
+    'auth',
+    'cors',
+    'silent',
+    'single',
+    'unzipped',
+    'clipless',
+    'open',
+    'treeless'
+  ]
 }

lib/server.js

@@ -139,7 +139,8 @@ module.exports = coroutine(function*(req, res, flags, current, ignoredFiles) {
       )
 
       // If it works, send the directory listing to the user
-      if (renderedDir) {
+      // If is treeless, stepover
+      if (renderedDir && !flags.treeless) {
         return micro.send(res, 200, renderedDir)
       }