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vendor/symfony/console/Output/StreamOutput.php

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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\Exception\RuntimeException;
+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 A stream resource
+     */
+    public function getStream()
+    {
+        return $this->stream;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doWrite($message, $newline)
+    {
+        if ($newline) {
+            $message .= PHP_EOL;
+        }
+
+        if (false === @fwrite($this->stream, $message)) {
+            // should never happen
+            throw new RuntimeException('Unable to write output.');
+        }
+
+        fflush($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()
+    {
+        if ('Hyper' === getenv('TERM_PROGRAM')) {
+            return true;
+        }
+
+        if (\DIRECTORY_SEPARATOR === '\\') {
+            return (\function_exists('sapi_windows_vt100_support')
+                && @sapi_windows_vt100_support($this->stream))
+                || false !== getenv('ANSICON')
+                || 'ON' === getenv('ConEmuANSI')
+                || 'xterm' === getenv('TERM');
+        }
+
+        if (\function_exists('stream_isatty')) {
+            return @stream_isatty($this->stream);
+        }
+
+        if (\function_exists('posix_isatty')) {
+            return @posix_isatty($this->stream);
+        }
+
+        $stat = @fstat($this->stream);
+        // Check if formatted mode is S_IFCHR
+        return $stat ? 0020000 === ($stat['mode'] & 0170000) : false;
+    }
+}