www.aleph1.co.uk Git - yaffs-website/blob - vendor/psy/psysh/src/Psy/Command/HelpCommand.php

   1 <?php
   2
   3 /*
   4  * This file is part of Psy Shell.
   5  *
   6  * (c) 2012-2017 Justin Hileman
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Psy\Command;
  13
  14 use Symfony\Component\Console\Helper\TableHelper;
  15 use Symfony\Component\Console\Input\InputArgument;
  16 use Symfony\Component\Console\Input\InputInterface;
  17 use Symfony\Component\Console\Output\OutputInterface;
  18
  19 /**
  20  * Help command.
  21  *
  22  * Lists available commands, and gives command-specific help when asked nicely.
  23  */
  24 class HelpCommand extends Command
  25 {
  26     private $command;
  27
  28     /**
  29      * {@inheritdoc}
  30      */
  31     protected function configure()
  32     {
  33         $this
  34             ->setName('help')
  35             ->setAliases(array('?'))
  36             ->setDefinition(array(
  37                 new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', null),
  38             ))
  39             ->setDescription('Show a list of commands. Type `help [foo]` for information about [foo].')
  40             ->setHelp('My. How meta.');
  41     }
  42
  43     /**
  44      * Helper for setting a subcommand to retrieve help for.
  45      *
  46      * @param Command $command
  47      */
  48     public function setCommand($command)
  49     {
  50         $this->command = $command;
  51     }
  52
  53     /**
  54      * {@inheritdoc}
  55      */
  56     protected function execute(InputInterface $input, OutputInterface $output)
  57     {
  58         if ($this->command !== null) {
  59             // help for an individual command
  60             $output->page($this->command->asText());
  61             $this->command = null;
  62         } elseif ($name = $input->getArgument('command_name')) {
  63             // help for an individual command
  64             $output->page($this->getApplication()->get($name)->asText());
  65         } else {
  66             // list available commands
  67             $commands = $this->getApplication()->all();
  68
  69             $table = $this->getTable($output);
  70
  71             foreach ($commands as $name => $command) {
  72                 if ($name !== $command->getName()) {
  73                     continue;
  74                 }
  75
  76                 if ($command->getAliases()) {
  77                     $aliases = sprintf('<comment>Aliases:</comment> %s', implode(', ', $command->getAliases()));
  78                 } else {
  79                     $aliases = '';
  80                 }
  81
  82                 $table->addRow(array(
  83                     sprintf('<info>%s</info>', $name),
  84                     $command->getDescription(),
  85                     $aliases,
  86                 ));
  87             }
  88
  89             $output->startPaging();
  90             if ($table instanceof TableHelper) {
  91                 $table->render($output);
  92             } else {
  93                 $table->render();
  94             }
  95             $output->stopPaging();
  96         }
  97     }
  98 }