feat: add basic system utility

Author: mychidarko

src/Sprout.php

@@ -10,6 +10,7 @@
 use Leaf\Sprout\Process\Npm;
 use Leaf\Sprout\Style;
 use Leaf\Sprout\Prompt;
+use Leaf\Sprout\System;
 
 /**
  * Leaf Sprout
@@ -53,6 +54,14 @@ public function prompt(array $prompt)
         return (new Prompt($prompt))->ask();
     }
 
+    /**
+     * Return an instance of system utils
+     */
+    public function system(): System
+    {
+        return new System();
+    }
+
     /**
      * Prompt a confirmation
      * @param string $message The confirmation message

src/Sprout/System.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Leaf\Sprout;
+
+/**
+ * Lightweight system utilities
+ * ---
+ * System related helper functions for your sprout applications
+ */
+class System
+{
+    /**
+     * Check if the current OS is Windows
+     */
+    public static function isWindows(): bool
+    {
+        return strtoupper(substr(PHP_OS, 0, 3)) === 'WIN';
+    }
+
+    /**
+     * Check if the current OS is Linux
+     */
+    public static function isLinux(): bool
+    {
+        return PHP_OS === 'Linux';
+    }
+
+    /**
+     * Check if the current OS is MacOS
+     */
+    public static function isMacOS(): bool
+    {
+        return PHP_OS === 'Darwin';
+    }
+
+    /**
+     * Check if a system command exists
+     * @return bool
+     */
+    public static function commandExists(string $cmd)
+    {
+        if (static::isWindows()) {
+            return !empty(shell_exec(sprintf('where %s 2>NUL', escapeshellarg($cmd))));
+        }
+
+        return !empty(shell_exec(sprintf('command -v %s 2>/dev/null', escapeshellarg($cmd))));
+    }
+}