416 lines
12 KiB
PHP
416 lines
12 KiB
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\Autoload;
|
|
|
|
/**
|
|
* ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
|
|
*
|
|
* $loader = new \Composer\Autoload\ClassLoader();
|
|
*
|
|
* // register classes with namespaces
|
|
* $loader->add('Symfony\Component', __DIR__.'/component');
|
|
* $loader->add('Symfony', __DIR__.'/framework');
|
|
*
|
|
* // activate the autoloader
|
|
* $loader->register();
|
|
*
|
|
* // to enable searching the include path (eg. for PEAR packages)
|
|
* $loader->setUseIncludePath(true);
|
|
*
|
|
* In this example, if you try to use a class in the Symfony\Component
|
|
* namespace or one of its children (Symfony\Component\Console for instance),
|
|
* the autoloader will first look for the class under the component/
|
|
* directory, and it will then fallback to the framework/ directory if not
|
|
* found before giving up.
|
|
*
|
|
* This class is loosely based on the Symfony UniversalClassLoader.
|
|
*
|
|
* @author Fabien Potencier <fabien@symfony.com>
|
|
* @author Jordi Boggiano <j.boggiano@seld.be>
|
|
* @see http://www.php-fig.org/psr/psr-0/
|
|
* @see http://www.php-fig.org/psr/psr-4/
|
|
*/
|
|
class ClassLoader
|
|
{
|
|
// PSR-4
|
|
private $prefixLengthsPsr4 = array();
|
|
private $prefixDirsPsr4 = array();
|
|
private $fallbackDirsPsr4 = array();
|
|
|
|
// PSR-0
|
|
private $prefixesPsr0 = array();
|
|
private $fallbackDirsPsr0 = array();
|
|
|
|
private $useIncludePath = false;
|
|
private $classMap = array();
|
|
private $classMapAuthoritative = false;
|
|
private $missingClasses = array();
|
|
|
|
public function getPrefixes()
|
|
{
|
|
if (!empty($this->prefixesPsr0)) {
|
|
return call_user_func_array('array_merge', $this->prefixesPsr0);
|
|
}
|
|
|
|
return array();
|
|
}
|
|
|
|
public function getPrefixesPsr4()
|
|
{
|
|
return $this->prefixDirsPsr4;
|
|
}
|
|
|
|
public function getFallbackDirs()
|
|
{
|
|
return $this->fallbackDirsPsr0;
|
|
}
|
|
|
|
public function getFallbackDirsPsr4()
|
|
{
|
|
return $this->fallbackDirsPsr4;
|
|
}
|
|
|
|
public function getClassMap()
|
|
{
|
|
return $this->classMap;
|
|
}
|
|
|
|
/**
|
|
* @param array $classMap Class to filename map
|
|
*/
|
|
public function addClassMap(array $classMap)
|
|
{
|
|
if ($this->classMap) {
|
|
$this->classMap = array_merge($this->classMap, $classMap);
|
|
} else {
|
|
$this->classMap = $classMap;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a set of PSR-0 directories for a given prefix, either
|
|
* appending or prepending to the ones previously set for this prefix.
|
|
*
|
|
* @param string $prefix The prefix
|
|
* @param array|string $paths The PSR-0 root directories
|
|
* @param bool $prepend Whether to prepend the directories
|
|
*/
|
|
public function add($prefix, $paths, $prepend = false)
|
|
{
|
|
if (!$prefix) {
|
|
if ($prepend) {
|
|
$this->fallbackDirsPsr0 = array_merge(
|
|
(array) $paths,
|
|
$this->fallbackDirsPsr0
|
|
);
|
|
} else {
|
|
$this->fallbackDirsPsr0 = array_merge(
|
|
$this->fallbackDirsPsr0,
|
|
(array) $paths
|
|
);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
$first = $prefix[0];
|
|
if (!isset($this->prefixesPsr0[$first][$prefix])) {
|
|
$this->prefixesPsr0[$first][$prefix] = (array) $paths;
|
|
|
|
return;
|
|
}
|
|
if ($prepend) {
|
|
$this->prefixesPsr0[$first][$prefix] = array_merge(
|
|
(array) $paths,
|
|
$this->prefixesPsr0[$first][$prefix]
|
|
);
|
|
} else {
|
|
$this->prefixesPsr0[$first][$prefix] = array_merge(
|
|
$this->prefixesPsr0[$first][$prefix],
|
|
(array) $paths
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a set of PSR-4 directories for a given namespace, either
|
|
* appending or prepending to the ones previously set for this namespace.
|
|
*
|
|
* @param string $prefix The prefix/namespace, with trailing '\\'
|
|
* @param array|string $paths The PSR-4 base directories
|
|
* @param bool $prepend Whether to prepend the directories
|
|
*
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
public function addPsr4($prefix, $paths, $prepend = false)
|
|
{
|
|
if (!$prefix) {
|
|
// Register directories for the root namespace.
|
|
if ($prepend) {
|
|
$this->fallbackDirsPsr4 = array_merge(
|
|
(array) $paths,
|
|
$this->fallbackDirsPsr4
|
|
);
|
|
} else {
|
|
$this->fallbackDirsPsr4 = array_merge(
|
|
$this->fallbackDirsPsr4,
|
|
(array) $paths
|
|
);
|
|
}
|
|
} elseif (!isset($this->prefixDirsPsr4[$prefix])) {
|
|
// Register directories for a new namespace.
|
|
$length = strlen($prefix);
|
|
if ('\\' !== $prefix[$length - 1]) {
|
|
throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
|
|
}
|
|
$this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
|
|
$this->prefixDirsPsr4[$prefix] = (array) $paths;
|
|
} elseif ($prepend) {
|
|
// Prepend directories for an already registered namespace.
|
|
$this->prefixDirsPsr4[$prefix] = array_merge(
|
|
(array) $paths,
|
|
$this->prefixDirsPsr4[$prefix]
|
|
);
|
|
} else {
|
|
// Append directories for an already registered namespace.
|
|
$this->prefixDirsPsr4[$prefix] = array_merge(
|
|
$this->prefixDirsPsr4[$prefix],
|
|
(array) $paths
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a set of PSR-0 directories for a given prefix,
|
|
* replacing any others previously set for this prefix.
|
|
*
|
|
* @param string $prefix The prefix
|
|
* @param array|string $paths The PSR-0 base directories
|
|
*/
|
|
public function set($prefix, $paths)
|
|
{
|
|
if (!$prefix) {
|
|
$this->fallbackDirsPsr0 = (array) $paths;
|
|
} else {
|
|
$this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a set of PSR-4 directories for a given namespace,
|
|
* replacing any others previously set for this namespace.
|
|
*
|
|
* @param string $prefix The prefix/namespace, with trailing '\\'
|
|
* @param array|string $paths The PSR-4 base directories
|
|
*
|
|
* @throws \InvalidArgumentException
|
|
*/
|
|
public function setPsr4($prefix, $paths)
|
|
{
|
|
if (!$prefix) {
|
|
$this->fallbackDirsPsr4 = (array) $paths;
|
|
} else {
|
|
$length = strlen($prefix);
|
|
if ('\\' !== $prefix[$length - 1]) {
|
|
throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
|
|
}
|
|
$this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
|
|
$this->prefixDirsPsr4[$prefix] = (array) $paths;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Turns on searching the include path for class files.
|
|
*
|
|
* @param bool $useIncludePath
|
|
*/
|
|
public function setUseIncludePath($useIncludePath)
|
|
{
|
|
$this->useIncludePath = $useIncludePath;
|
|
}
|
|
|
|
/**
|
|
* Can be used to check if the autoloader uses the include path to check
|
|
* for classes.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function getUseIncludePath()
|
|
{
|
|
return $this->useIncludePath;
|
|
}
|
|
|
|
/**
|
|
* Turns off searching the prefix and fallback directories for classes
|
|
* that have not been registered with the class map.
|
|
*
|
|
* @param bool $classMapAuthoritative
|
|
*/
|
|
public function setClassMapAuthoritative($classMapAuthoritative)
|
|
{
|
|
$this->classMapAuthoritative = $classMapAuthoritative;
|
|
}
|
|
|
|
/**
|
|
* Should class lookup fail if not found in the current class map?
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isClassMapAuthoritative()
|
|
{
|
|
return $this->classMapAuthoritative;
|
|
}
|
|
|
|
/**
|
|
* Registers this instance as an autoloader.
|
|
*
|
|
* @param bool $prepend Whether to prepend the autoloader or not
|
|
*/
|
|
public function register($prepend = false)
|
|
{
|
|
spl_autoload_register(array($this, 'loadClass'), true, $prepend);
|
|
}
|
|
|
|
/**
|
|
* Unregisters this instance as an autoloader.
|
|
*/
|
|
public function unregister()
|
|
{
|
|
spl_autoload_unregister(array($this, 'loadClass'));
|
|
}
|
|
|
|
/**
|
|
* Loads the given class or interface.
|
|
*
|
|
* @param string $class The name of the class
|
|
* @return bool|null True if loaded, null otherwise
|
|
*/
|
|
public function loadClass($class)
|
|
{
|
|
if ($file = $this->findFile($class)) {
|
|
includeFile($file);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Finds the path to the file where the class is defined.
|
|
*
|
|
* @param string $class The name of the class
|
|
*
|
|
* @return string|false The path if found, false otherwise
|
|
*/
|
|
public function findFile($class)
|
|
{
|
|
// work around for PHP 5.3.0 - 5.3.2 https://bugs.php.net/50731
|
|
if ('\\' == $class[0]) {
|
|
$class = substr($class, 1);
|
|
}
|
|
|
|
// class map lookup
|
|
if (isset($this->classMap[$class])) {
|
|
return $this->classMap[$class];
|
|
}
|
|
if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
|
|
return false;
|
|
}
|
|
|
|
$file = $this->findFileWithExtension($class, '.php');
|
|
|
|
// Search for Hack files if we are running on HHVM
|
|
if (false === $file && defined('HHVM_VERSION')) {
|
|
$file = $this->findFileWithExtension($class, '.hh');
|
|
}
|
|
|
|
if (false === $file) {
|
|
// Remember that this class does not exist.
|
|
$this->missingClasses[$class] = true;
|
|
}
|
|
|
|
return $file;
|
|
}
|
|
|
|
private function findFileWithExtension($class, $ext)
|
|
{
|
|
// PSR-4 lookup
|
|
$logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
|
|
|
|
$first = $class[0];
|
|
if (isset($this->prefixLengthsPsr4[$first])) {
|
|
foreach ($this->prefixLengthsPsr4[$first] as $prefix => $length) {
|
|
if (0 === strpos($class, $prefix)) {
|
|
foreach ($this->prefixDirsPsr4[$prefix] as $dir) {
|
|
if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
|
|
return $file;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// PSR-4 fallback dirs
|
|
foreach ($this->fallbackDirsPsr4 as $dir) {
|
|
if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
|
|
return $file;
|
|
}
|
|
}
|
|
|
|
// PSR-0 lookup
|
|
if (false !== $pos = strrpos($class, '\\')) {
|
|
// namespaced class name
|
|
$logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
|
|
. strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
|
|
} else {
|
|
// PEAR-like class name
|
|
$logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
|
|
}
|
|
|
|
if (isset($this->prefixesPsr0[$first])) {
|
|
foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
|
|
if (0 === strpos($class, $prefix)) {
|
|
foreach ($dirs as $dir) {
|
|
if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
|
|
return $file;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// PSR-0 fallback dirs
|
|
foreach ($this->fallbackDirsPsr0 as $dir) {
|
|
if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
|
|
return $file;
|
|
}
|
|
}
|
|
|
|
// PSR-0 include paths.
|
|
if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
|
|
return $file;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scope isolated include.
|
|
*
|
|
* Prevents access to $this/self from included files.
|
|
*/
|
|
function includeFile($file)
|
|
{
|
|
include $file;
|
|
}
|