Feature Proposal: Session Reloading

src/Command/ReloadCommand.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Command;
+
+use Psy\Exception\RuntimeException;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Reload the Psy Shell.
+ */
+class ReloadCommand extends Command
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('reload')
+            ->setAliases(['reload!'])
+            ->setDefinition([])
+            ->setDescription('Reload the current session.')
+            ->setHelp(
+                <<<'HELP'
+Reload the current session.
+
+<warning>Note: The PCNTL extension is required for reload to work.</warning>
+
+e.g.
+<return>>>> reload</return>
+HELP
+            );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        if (!function_exists('pcntl_exec')) {
+            throw new RuntimeException('Unable to reload session (PCNTL is required).');
+        }
+
+        $output->writeln('<info>Reloading...</info>');
+
+        if (!defined('PHP_BINARY')) {
+            throw new RuntimeException('Unable to identify PHP binary path.');
+        }
+
+        pcntl_exec(PHP_BINARY, $_SERVER['argv']);
+    }
+}

src/Shell.php

@@ -196,6 +196,7 @@ protected function getDefaultCommands()
             new Command\BufferCommand(),
             new Command\ClearCommand(),
             new Command\EditCommand($this->config->getRuntimeDir()),
+            new Command\ReloadCommand(),
             // new Command\PsyVersionCommand(),
             $sudo,
             $hist,