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<?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\Output;
use Symfony\Component\Console\Exception\InvalidArgumentException;
use Symfony\Component\Console\Formatter\OutputFormatterInterface;
/**
* StreamOutput writes the output to a given stream.
*
* Usage:
*
* $output = new StreamOutput(fopen('php://stdout', 'w'));
*
* As `StreamOutput` can use any stream, you can also use a file:
*
* $output = new StreamOutput(fopen('/path/to/output.log', 'a', false));
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class StreamOutput extends Output
{
private $stream;
/**
* @param resource $stream A stream resource
* @param int $verbosity The verbosity level (one of the VERBOSITY constants in OutputInterface)
* @param bool|null $decorated Whether to decorate messages (null for auto-guessing)
* @param OutputFormatterInterface|null $formatter Output formatter instance (null to use default OutputFormatter)
*
* @throws InvalidArgumentException When first argument is not a real stream
*/
public function __construct($stream, int $verbosity = self::VERBOSITY_NORMAL, bool $decorated = null, OutputFormatterInterface $formatter = null)
{
if (!\is_resource($stream) || 'stream' !== get_resource_type($stream)) {
throw new InvalidArgumentException('The StreamOutput class needs a stream as its first argument.');
}
$this->stream = $stream;
if (null === $decorated) {
$decorated = $this->hasColorSupport();
}
parent::__construct($verbosity, $decorated, $formatter);
}
/**
* Gets the stream attached to this StreamOutput instance.
*
* @return resource
*/
public function getStream()
{
return $this->stream;
}
/**
* {@inheritdoc}
*/
protected function doWrite(string $message, bool $newline)
{
if ($newline) {
$message .= \PHP_EOL;
}
@fwrite($this->stream, $message);
fflush($this->stream);
}
/**
* Returns true if the stream supports colorization.
*
* Colorization is disabled if not supported by the stream:
*
* This is tricky on Windows, because Cygwin, Msys2 etc emulate pseudo
* terminals via named pipes, so we can only check the environment.
*
* Reference: Composer\XdebugHandler\Process::supportsColor
* https://github.com/composer/xdebug-handler
*
* @return bool true if the stream supports colorization, false otherwise
*/
protected function hasColorSupport(): bool
{
// Follow https://no-color.org/
if (isset($_SERVER['NO_COLOR']) || false !== getenv('NO_COLOR')) {
return false;
}
if ('Hyper' === getenv('TERM_PROGRAM')) {
return true;
}
if (\DIRECTORY_SEPARATOR === '\\') {
return (\function_exists('sapi_windows_vt100_support')
&& @sapi_windows_vt100_support($this->stream))
|| false !== getenv('ANSICON')
|| 'ON' === getenv('ConEmuANSI')
|| 'xterm' === getenv('TERM');
}
return stream_isatty($this->stream);
}
}
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