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<?php /* * This file is part of Composer. * * (c) Nils Adermann <[email protected]> * Jordi Boggiano <[email protected]> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Composer\Util; /** * Platform helper for uniform platform-specific tests. * * @author Niels Keurentjes <[email protected]> */ class Platform { /** @var ?bool */ private static $isVirtualBoxGuest = null; /** @var ?bool */ private static $isWindowsSubsystemForLinux = null; /** * putenv() equivalent but updates the runtime global variables too * * @param string $name * @param string $value * @return void */ public static function putEnv($name, $value) { $value = (string) $value; putenv($name . '=' . $value); $_SERVER[$name] = $_ENV[$name] = $value; } /** * putenv('X') equivalent but updates the runtime global variables too * * @param string $name * @return void */ public static function clearEnv($name) { putenv($name); unset($_SERVER[$name], $_ENV[$name]); } /** * Parses tildes and environment variables in paths. * * @param string $path * @return string */ public static function expandPath($path) { if (preg_match('#^~[\\/]#', $path)) { return self::getUserDirectory() . substr($path, 1); } return preg_replace_callback('#^(\$|(?P<percent>%))(?P<var>\w++)(?(percent)%)(?P<path>.*)#', function ($matches) { // Treat HOME as an alias for USERPROFILE on Windows for legacy reasons if (Platform::isWindows() && $matches['var'] == 'HOME') { return (getenv('HOME') ?: getenv('USERPROFILE')) . $matches['path']; } return getenv($matches['var']) . $matches['path']; }, $path); } /** * @throws \RuntimeException If the user home could not reliably be determined * @return string The formal user home as detected from environment parameters */ public static function getUserDirectory() { if (false !== ($home = getenv('HOME'))) { return $home; } if (self::isWindows() && false !== ($home = getenv('USERPROFILE'))) { return $home; } if (\function_exists('posix_getuid') && \function_exists('posix_getpwuid')) { $info = posix_getpwuid(posix_getuid()); return $info['dir']; } throw new \RuntimeException('Could not determine user directory'); } /** * @return bool Whether the host machine is running on the Windows Subsystem for Linux (WSL) */ public static function isWindowsSubsystemForLinux() { if (null === self::$isWindowsSubsystemForLinux) { self::$isWindowsSubsystemForLinux = false; // while WSL will be hosted within windows, WSL itself cannot be windows based itself. if (self::isWindows()) { return self::$isWindowsSubsystemForLinux = false; } if (is_readable('/proc/version') && false !== stripos(file_get_contents('/proc/version'), 'microsoft')) { return self::$isWindowsSubsystemForLinux = true; } } return self::$isWindowsSubsystemForLinux; } /** * @return bool Whether the host machine is running a Windows OS */ public static function isWindows() { return \defined('PHP_WINDOWS_VERSION_BUILD'); } /** * @param string $str * @return int return a guaranteed binary length of the string, regardless of silly mbstring configs */ public static function strlen($str) { static $useMbString = null; if (null === $useMbString) { $useMbString = \function_exists('mb_strlen') && ini_get('mbstring.func_overload'); } if ($useMbString) { return mb_strlen($str, '8bit'); } return \strlen($str); } public static function isTty($fd = null) { if ($fd === null) { $fd = defined('STDOUT') ? STDOUT : fopen('php://stdout', 'w'); } // detect msysgit/mingw and assume this is a tty because detection // does not work correctly, see https://github.com/composer/composer/issues/9690 if (in_array(strtoupper(getenv('MSYSTEM') ?: ''), array('MINGW32', 'MINGW64'), true)) { return true; } // modern cross-platform function, includes the fstat // fallback so if it is present we trust it if (function_exists('stream_isatty')) { return stream_isatty($fd); } // only trusting this if it is positive, otherwise prefer fstat fallback if (function_exists('posix_isatty') && posix_isatty($fd)) { return true; } $stat = @fstat($fd); // Check if formatted mode is S_IFCHR return $stat ? 0020000 === ($stat['mode'] & 0170000) : false; } public static function workaroundFilesystemIssues() { if (self::isVirtualBoxGuest()) { usleep(200000); } } /** * Attempts detection of VirtualBox guest VMs * * This works based on the process' user being "vagrant", the COMPOSER_RUNTIME_ENV env var being set to "virtualbox", or lsmod showing the virtualbox guest additions are loaded * * @return bool */ private static function isVirtualBoxGuest() { if (null === self::$isVirtualBoxGuest) { self::$isVirtualBoxGuest = false; if (self::isWindows()) { return self::$isVirtualBoxGuest; } if (function_exists('posix_getpwuid') && function_exists('posix_geteuid')) { $processUser = posix_getpwuid(posix_geteuid()); if ($processUser && $processUser['name'] === 'vagrant') { return self::$isVirtualBoxGuest = true; } } if (getenv('COMPOSER_RUNTIME_ENV') === 'virtualbox') { return self::$isVirtualBoxGuest = true; } if (defined('PHP_OS_FAMILY') && PHP_OS_FAMILY === 'Linux') { $process = new ProcessExecutor(); try { if (0 === $process->execute('lsmod | grep vboxguest', $ignoredOutput)) { return self::$isVirtualBoxGuest = true; } } catch (\Exception $e) { // noop } } } return self::$isVirtualBoxGuest; } }