Merge pull request #3 from inhere/master

update: add a util class. some modify ...

src/Command.php

@@ -116,7 +116,7 @@ private function indexComamnd(string $className)
             'Usage:'       => [ \input()->getCommand() . ':{command} [arguments] [options]'],
             'Commands:'    => $methodCommands,
             'Options:'     => [
-                '-h,--help' => 'Show help of the command group or specified command action',
+                '-h, --help' => 'Show help of the command group or specified command action',
             ],
         ];
 
@@ -186,8 +186,8 @@ private function showCommandList()
         $commandList['Usage:'] = ["php $script"];
         $commandList['Commands:'] = $commands;
         $commandList['Options:'] = [
-            '-v,--version' => 'show version',
-            '-h,--help'    => 'show help',
+            '-h, --help'    => 'show help information',
+            '-v, --version' => 'show version',
         ];
 
         // show logo

src/Helper/ConsoleUtil.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: inhere
+ * Date: 2018/3/14
+ * Time: 下午3:21
+ */
+
+namespace Swoft\Console\Helper;
+
+/**
+ * Class ConsoleUtil
+ * @package Swoft\Console\Helper
+ */
+class ConsoleUtil
+{
+    /**
+     * 确认, 发出信息要求确认
+     * @param string $question 发出的信息
+     * @param bool $default Default value
+     * @return bool
+     */
+    public static function confirm(string $question, $default = true): bool
+    {
+        if (!$question = trim($question)) {
+            \output()->writeln('Please provide a question message!', true, 2);
+        }
+
+        $question = ucfirst(trim($question, '?'));
+        $default = (bool)$default;
+        $defaultText = $default ? 'yes' : 'no';
+        $message = "<comment>$question ?</comment>\nPlease confirm (yes|no)[default:<info>$defaultText</info>]: ";
+
+        while (true) {
+            \output()->writeln($message, false);
+            $answer = \input()->read();
+
+            if (empty($answer)) {
+                return $default;
+            }
+
+            if (0 === stripos($answer, 'y')) {
+                return true;
+            }
+
+            if (0 === stripos($answer, 'n')) {
+                return false;
+            }
+        }
+
+        return false;
+    }
+}