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system/Commands/Utilities/Namespaces.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Commands\Utilities;
+
+use CodeIgniter\CLI\BaseCommand;
+use CodeIgniter\CLI\CLI;
+use Config\Autoload;
+
+/**
+ * Lists namespaces set in Config\Autoload with their
+ * full server path. Helps you to verify that you have
+ * the namespaces setup correctly.
+ */
+class Namespaces extends BaseCommand
+{
+    /**
+     * The group the command is lumped under
+     * when listing commands.
+     *
+     * @var string
+     */
+    protected $group = 'CodeIgniter';
+
+    /**
+     * The Command's name
+     *
+     * @var string
+     */
+    protected $name = 'namespaces';
+
+    /**
+     * the Command's short description
+     *
+     * @var string
+     */
+    protected $description = 'Verifies your namespaces are setup correctly.';
+
+    /**
+     * the Command's usage
+     *
+     * @var string
+     */
+    protected $usage = 'namespaces';
+
+    /**
+     * the Command's Arguments
+     *
+     * @var array
+     */
+    protected $arguments = [];
+
+    /**
+     * the Command's Options
+     *
+     * @var array
+     */
+    protected $options = [];
+
+    /**
+     * Displays the help for the spark cli script itself.
+     */
+    public function run(array $params)
+    {
+        $config = new Autoload();
+
+        $tbody = [];
+
+        foreach ($config->psr4 as $ns => $path) {
+            $path = realpath($path) ?: $path;
+
+            $tbody[] = [
+                $ns,
+                realpath($path) ?: $path,
+                is_dir($path) ? 'Yes' : 'MISSING',
+            ];
+        }
+
+        $thead = [
+            'Namespace',
+            'Path',
+            'Found?',
+        ];
+
+        CLI::table($tbody, $thead);
+    }
+}