First commit

vendor/symfony/console/Command/HelpCommand.php

@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Command;
+
+use Symfony\Component\Console\Helper\DescriptorHelper;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * HelpCommand displays the help for a given command.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class HelpCommand extends Command
+{
+    private $command;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this->ignoreValidationErrors();
+
+        $this
+            ->setName('help')
+            ->setDefinition(array(
+                new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', 'help'),
+                new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
+                new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw command help'),
+            ))
+            ->setDescription('Displays help for a command')
+            ->setHelp(<<<'EOF'
+The <info>%command.name%</info> command displays help for a given command:
+
+  <info>php %command.full_name% list</info>
+
+You can also output the help in other formats by using the <comment>--format</comment> option:
+
+  <info>php %command.full_name% --format=xml list</info>
+
+To display the list of available commands, please use the <info>list</info> command.
+EOF
+            )
+        ;
+    }
+
+    public function setCommand(Command $command)
+    {
+        $this->command = $command;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        if (null === $this->command) {
+            $this->command = $this->getApplication()->find($input->getArgument('command_name'));
+        }
+
+        $helper = new DescriptorHelper();
+        $helper->describe($output, $this->command, array(
+            'format' => $input->getOption('format'),
+            'raw_text' => $input->getOption('raw'),
+        ));
+
+        $this->command = null;
+    }
+}