Current File : //usr/share/php/Composer/Util/Platform.php
<?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
{
/**
* 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);
}
}
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