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<?php /* * This file is part of Psy Shell. * * (c) 2012-2026 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\Formatter\ManualWrapper; use Psy\Readline\Interactive\Layout\DisplayString; use Psy\Util\Tty; use Symfony\Component\Console\Exception\CommandNotFoundException; use Symfony\Component\Console\Input\InputArgument; use Symfony\Component\Console\Input\InputInterface; use Symfony\Component\Console\Output\OutputInterface; /* * Help command. * * Lists available commands, and gives command-specific help when asked nicely. / class HelpCommand extends Command { private const TABLE_OVERHEAD_TWO_COLUMNS = 7; private const TABLE_OVERHEAD_THREE_COLUMNS = 10; private const MIN_DESCRIPTION_WIDTH_FOR_ALIAS_COLUMN = 40; private ?Command $command = null; private ?InputInterface $commandInput = null; /* * {@inheritdoc} / protected function configure(): void { $this ->setName('help') ->setAliases(['?']) ->setDefinition([ new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name.', null), ]) ->setDescription('Show a list of commands. Type `help [foo]` for information about [foo].') ->setHelp('My. How meta.'); } /* * Helper for setting a subcommand to retrieve help for. * * @param Command $command / public function setCommand(Command $command) { $this->command = $command; } /* * Helper for preserving the original input when rendering contextual help. / public function setCommandInput(InputInterface $input): void { $this->commandInput = $input; } /* * {@inheritdoc} * * @return int 0 if everything went fine, or an exit code / protected function execute(InputInterface $input, OutputInterface $output): int { $shellOutput = $this->shellOutput($output); if ($this->command !== null) { // help for an individual command $shellOutput->page($this->command->asTextForInput($this->commandInput ?? $input)); $this->command = null; $this->commandInput = null; } elseif ($name = $input->getArgument('command_name')) { // help for an individual command try { $cmd = $this->getApplication()->get($name); } catch (CommandNotFoundException $e) { $this->getShell()->writeException($e); $output->writeln(''); $output->writeln(\sprintf( '<aside>To read PHP documentation, use <return>doc %s</return></aside>', $name )); $output->writeln(''); return 1; } if (!$cmd instanceof Command) { throw new \RuntimeException(\sprintf('Expected Psy\Command\Command instance, got %s', \get_class($cmd))); } $shellOutput->page($cmd->asTextForInput($input)); } else { $this->commandInput = null; $shellOutput->page(function (OutputInterface $pagedOutput): void { $this->renderCommandList($pagedOutput); }); } return 0; } /* * Render the top-level command list with fixed command widths and a * conditional alias column when the terminal is wide enough. */ private function renderCommandList(OutputInterface $output): void { $commands = []; foreach ($this->getApplication()->all() as $name => $command) { if ($name !== $command->getName()) { continue; } $commands[] = [ 'name' => $name, 'description' => $command->getDescription(), 'aliasText' => $command->getAliases() ? \sprintf('<comment>Aliases:</comment> %s', \implode(', ', $command->getAliases())) : '', ]; } $nameWidth = 0; $aliasWidth = 0; $descriptionWidth = 0; $formatter = $output->getFormatter(); foreach ($commands as $command) { $nameWidth = \max($nameWidth, DisplayString::width($command['name'])); $aliasWidth = \max($aliasWidth, DisplayString::widthWithoutFormatting($command['aliasText'], $formatter)); $descriptionWidth = \max($descriptionWidth, DisplayString::width($command['description'])); } $terminalWidth = Tty::getWidth(); $wrapper = new ManualWrapper(); $table = $this->getTable($output)->setColumnWidth(0, $nameWidth); $descriptionWidthWithAliasColumn = $terminalWidth - $nameWidth - $aliasWidth - self::TABLE_OVERHEAD_THREE_COLUMNS; if ($aliasWidth > 0 && $descriptionWidthWithAliasColumn >= self::MIN_DESCRIPTION_WIDTH_FOR_ALIAS_COLUMN) { $descriptionColumnWidth = \min($descriptionWidth, $descriptionWidthWithAliasColumn); $table ->setColumnWidth(1, $descriptionColumnWidth) ->setColumnWidth(2, $aliasWidth); foreach ($commands as $command) { $table->addRow([ \sprintf('<info>%s</info>', $command['name']), $wrapper->wrap($command['description'], $descriptionColumnWidth), $command['aliasText'], ]); } $table->render(); return; } $detailsWidth = \max(10, $terminalWidth - $nameWidth - self::TABLE_OVERHEAD_TWO_COLUMNS); $table->setColumnWidth(1, $detailsWidth); foreach ($commands as $command) { $details = $wrapper->wrap($command['description'], $detailsWidth); if ($command['aliasText'] !== '') { $details .= "\n".$wrapper->wrap($command['aliasText'], $detailsWidth); } $table->addRow([ \sprintf('<info>%s</info>', $command['name']), $details, ]); } $table->render(); } }

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