fix the undefined in help #414

index.js

@@ -185,7 +185,7 @@ Command.prototype.command = function(name, desc, opts) {
 
 Command.prototype.arguments = function (desc) {
   return this.parseExpectedArgs(desc.split(/ +/));
-}
+};
 
 /**
  * Add an implicit `help [cmd]` subcommand
@@ -549,6 +549,7 @@ Command.prototype.executeSubCommand = function(argv, args, unknown) {
     process.exit(1);
   });
 
+  // Store the reference to the child process
   this.runningCommand = proc;
 };
 
@@ -836,7 +837,7 @@ Command.prototype.version = function(str, flags) {
  */
 
 Command.prototype.description = function(str) {
-  if (0 == arguments.length) return this._description;
+  if (0 === arguments.length) return this._description;
   this._description = str;
   return this;
 };
@@ -915,10 +916,10 @@ Command.prototype.optionHelp = function() {
 
   // Prepend the help information
   return [pad('-h, --help', width) + '  ' + 'output usage information']
-    .concat(this.options.map(function(option) {
-      return pad(option.flags, width) + '  ' + option.description;
+      .concat(this.options.map(function(option) {
+        return pad(option.flags, width) + '  ' + option.description;
       }))
-    .join('\n');
+      .join('\n');
 };
 
 /**
@@ -940,14 +941,10 @@ Command.prototype.commandHelp = function() {
 
     return [
       cmd._name
-        + (cmd._alias
-          ? '|' + cmd._alias
-          : '')
-        + (cmd.options.length
-          ? ' [options]'
-          : '')
+        + (cmd._alias ? '|' + cmd._alias : '')
+        + (cmd.options.length ? ' [options]' : '')
         + ' ' + args
-    , cmd.description()
+      , cmd.description()
     ];
   });
 
@@ -956,11 +953,12 @@ Command.prototype.commandHelp = function() {
   }, 0);
 
   return [
-      ''
+    ''
     , '  Commands:'
     , ''
     , commands.map(function(cmd) {
-      return pad(cmd[0], width) + '  ' + cmd[1];
+      var desc = cmd[1] ? '  ' + cmd[1] : '';
+      return pad(cmd[0], width) + desc;
     }).join('\n').replace(/^/gm, '    ')
     , ''
   ].join('\n');

test/test.command.help.js

@@ -0,0 +1,14 @@
+var program = require('../')
+  , sinon = require('sinon').sandbox.create()
+  , should = require('should');
+
+
+program.command('mycommand [options]');
+
+program.parse(['node', 'test']);
+
+program.commandHelp().should.equal('\n  Commands:\n\n    mycommand [options]\n');
+
+
+
+