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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* 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 <niels.keurentjes@omines.com>
*/
class Platform
{
/** @var ?bool */
private static $isVirtualBoxGuest = null;
/**
* 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 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;
}
}
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