setName('buffer')
->setAliases(['buf'])
->setDefinition([
new InputOption('clear', '', InputOption::VALUE_NONE, 'Clear the current buffer.'),
])
->setDescription('Show (or clear) the contents of the code input buffer.')
->setHelp(
<<<'HELP'
Show the contents of the code buffer for the current multi-line expression.
Optionally, clear the buffer by passing the --clear option.
HELP
);
}
/**
* {@inheritdoc}
*
* @return int 0 if everything went fine, or an exit code
*/
protected function execute(InputInterface $input, OutputInterface $output): int
{
$shell = $this->getShell();
$shellOutput = $this->shellOutput($output);
$readline = $this->getLegacyReadline();
$legacyBuffer = $readline->getBuffer();
$shellBuffer = $shell->getPendingCodeBuffer();
$buf = $legacyBuffer !== [] ? $legacyBuffer : $shellBuffer;
if ($input->getOption('clear')) {
$readline->clearBuffer();
if ($shellBuffer !== []) {
$shell->clearPendingCodeBuffer();
}
$shellOutput->writeln($this->formatLines($buf, 'urgent'), ShellOutputAdapter::NUMBER_LINES);
} else {
$shellOutput->writeln($this->formatLines($buf), ShellOutputAdapter::NUMBER_LINES);
}
return 0;
}
/**
* Set the shell's readline implementation.
*/
public function setReadline(Readline $readline)
{
$this->readline = $readline;
}
/**
* A helper method for wrapping buffer lines in `` and `` formatter strings.
*
* @param array $lines
* @param string $type (default: 'return')
*
* @return array Formatted strings
*/
protected function formatLines(array $lines, string $type = 'return'): array
{
$template = \sprintf('<%s>%%s', $type, $type);
return \array_map(fn ($line) => \sprintf($template, $line), $lines);
}
/**
* Get the active multiline buffer from the legacy shim.
*/
private function getLegacyReadline(): LegacyReadline
{
if ($this->readline instanceof LegacyReadline) {
return $this->readline;
}
throw new \LogicException('BufferCommand requires LegacyReadline.');
}
}