File "autoload.php"
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MIME-type: text/x-php
Charset: utf-8
<?php
/**
* Autoloads files for PHP_CodeSniffer and tracks what has been loaded.
*
* Due to different namespaces being used for custom coding standards,
* the autoloader keeps track of what class is loaded after a file is included,
* even if the file is ultimately included by another autoloader (such as composer).
*
* This allows PHP_CodeSniffer to request the class name after loading a class
* when it only knows the filename, without having to parse the file to find it.
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer;
if (class_exists('PHP_CodeSniffer\Autoload', false) === false) {
class Autoload
{
/**
* The composer autoloader.
*
* @var \Composer\Autoload\ClassLoader
*/
private static $composerAutoloader = null;
/**
* A mapping of file names to class names.
*
* @var array<string, string>
*/
private static $loadedClasses = [];
/**
* A mapping of class names to file names.
*
* @var array<string, string>
*/
private static $loadedFiles = [];
/**
* A list of additional directories to search during autoloading.
*
* This is typically a list of coding standard directories.
*
* @var string[]
*/
private static $searchPaths = [];
/**
* Loads a class.
*
* This method only loads classes that exist in the PHP_CodeSniffer namespace.
* All other classes are ignored and loaded by subsequent autoloaders.
*
* @param string $class The name of the class to load.
*
* @return bool
*/
public static function load($class)
{
// Include the composer autoloader if there is one, but re-register it
// so this autoloader runs before the composer one as we need to include
// all files so we can figure out what the class/interface/trait name is.
if (self::$composerAutoloader === null) {
// Make sure we don't try to load any of Composer's classes
// while the autoloader is being setup.
if (strpos($class, 'Composer\\') === 0) {
return;
}
if (strpos(__DIR__, 'phar://') !== 0
&& @file_exists(__DIR__.'/../../autoload.php') === true
) {
self::$composerAutoloader = include __DIR__.'/../../autoload.php';
if (self::$composerAutoloader instanceof \Composer\Autoload\ClassLoader) {
self::$composerAutoloader->unregister();
self::$composerAutoloader->register();
} else {
// Something went wrong, so keep going without the autoloader
// although namespaced sniffs might error.
self::$composerAutoloader = false;
}
} else {
self::$composerAutoloader = false;
}
}//end if
$ds = DIRECTORY_SEPARATOR;
$path = false;
if (substr($class, 0, 16) === 'PHP_CodeSniffer\\') {
if (substr($class, 0, 22) === 'PHP_CodeSniffer\Tests\\') {
$isInstalled = !is_dir(__DIR__.$ds.'tests');
if ($isInstalled === false) {
$path = __DIR__.$ds.'tests';
} else {
$path = '@test_dir@'.$ds.'PHP_CodeSniffer'.$ds.'CodeSniffer';
}
$path .= $ds.substr(str_replace('\\', $ds, $class), 22).'.php';
} else {
$path = __DIR__.$ds.'src'.$ds.substr(str_replace('\\', $ds, $class), 16).'.php';
}
}
// See if the composer autoloader knows where the class is.
if ($path === false && self::$composerAutoloader !== false) {
$path = self::$composerAutoloader->findFile($class);
}
// See if the class is inside one of our alternate search paths.
if ($path === false) {
foreach (self::$searchPaths as $searchPath => $nsPrefix) {
$className = $class;
if ($nsPrefix !== '' && substr($class, 0, strlen($nsPrefix)) === $nsPrefix) {
$className = substr($class, (strlen($nsPrefix) + 1));
}
$path = $searchPath.$ds.str_replace('\\', $ds, $className).'.php';
if (is_file($path) === true) {
break;
}
$path = false;
}
}
if ($path !== false && is_file($path) === true) {
self::loadFile($path);
return true;
}
return false;
}//end load()
/**
* Includes a file and tracks what class or interface was loaded as a result.
*
* @param string $path The path of the file to load.
*
* @return string The fully qualified name of the class in the loaded file.
*/
public static function loadFile($path)
{
if (strpos(__DIR__, 'phar://') !== 0) {
$path = realpath($path);
if ($path === false) {
return false;
}
}
if (isset(self::$loadedClasses[$path]) === true) {
return self::$loadedClasses[$path];
}
$classesBeforeLoad = [
'classes' => get_declared_classes(),
'interfaces' => get_declared_interfaces(),
'traits' => get_declared_traits(),
];
include $path;
$classesAfterLoad = [
'classes' => get_declared_classes(),
'interfaces' => get_declared_interfaces(),
'traits' => get_declared_traits(),
];
$className = self::determineLoadedClass($classesBeforeLoad, $classesAfterLoad);
self::$loadedClasses[$path] = $className;
self::$loadedFiles[$className] = $path;
return self::$loadedClasses[$path];
}//end loadFile()
/**
* Determine which class was loaded based on the before and after lists of loaded classes.
*
* @param array $classesBeforeLoad The classes/interfaces/traits before the file was included.
* @param array $classesAfterLoad The classes/interfaces/traits after the file was included.
*
* @return string The fully qualified name of the class in the loaded file.
*/
public static function determineLoadedClass($classesBeforeLoad, $classesAfterLoad)
{
$className = null;
$newClasses = array_diff($classesAfterLoad['classes'], $classesBeforeLoad['classes']);
if (PHP_VERSION_ID < 70400) {
$newClasses = array_reverse($newClasses);
}
// Since PHP 7.4 get_declared_classes() does not guarantee any order, making
// it impossible to use order to determine which is the parent an which is the child.
// Let's reduce the list of candidates by removing all the classes known to be "parents".
// That way, at the end, only the "main" class just included will remain.
$newClasses = array_reduce(
$newClasses,
function ($remaining, $current) {
return array_diff($remaining, class_parents($current));
},
$newClasses
);
foreach ($newClasses as $name) {
if (isset(self::$loadedFiles[$name]) === false) {
$className = $name;
break;
}
}
if ($className === null) {
$newClasses = array_reverse(array_diff($classesAfterLoad['interfaces'], $classesBeforeLoad['interfaces']));
foreach ($newClasses as $name) {
if (isset(self::$loadedFiles[$name]) === false) {
$className = $name;
break;
}
}
}
if ($className === null) {
$newClasses = array_reverse(array_diff($classesAfterLoad['traits'], $classesBeforeLoad['traits']));
foreach ($newClasses as $name) {
if (isset(self::$loadedFiles[$name]) === false) {
$className = $name;
break;
}
}
}
return $className;
}//end determineLoadedClass()
/**
* Adds a directory to search during autoloading.
*
* @param string $path The path to the directory to search.
* @param string $nsPrefix The namespace prefix used by files under this path.
*
* @return void
*/
public static function addSearchPath($path, $nsPrefix='')
{
self::$searchPaths[$path] = rtrim(trim((string) $nsPrefix), '\\');
}//end addSearchPath()
/**
* Retrieve the namespaces and paths registered by external standards.
*
* @return array
*/
public static function getSearchPaths()
{
return self::$searchPaths;
}//end getSearchPaths()
/**
* Gets the class name for the given file path.
*
* @param string $path The name of the file.
*
* @throws \Exception If the file path has not been loaded.
* @return string
*/
public static function getLoadedClassName($path)
{
if (isset(self::$loadedClasses[$path]) === false) {
throw new \Exception("Cannot get class name for $path; file has not been included");
}
return self::$loadedClasses[$path];
}//end getLoadedClassName()
/**
* Gets the file path for the given class name.
*
* @param string $class The name of the class.
*
* @throws \Exception If the class name has not been loaded
* @return string
*/
public static function getLoadedFileName($class)
{
if (isset(self::$loadedFiles[$class]) === false) {
throw new \Exception("Cannot get file name for $class; class has not been included");
}
return self::$loadedFiles[$class];
}//end getLoadedFileName()
/**
* Gets the mapping of file names to class names.
*
* @return array<string, string>
*/
public static function getLoadedClasses()
{
return self::$loadedClasses;
}//end getLoadedClasses()
/**
* Gets the mapping of class names to file names.
*
* @return array<string, string>
*/
public static function getLoadedFiles()
{
return self::$loadedFiles;
}//end getLoadedFiles()
}//end class
// Register the autoloader before any existing autoloaders to ensure
// it gets a chance to hear about every autoload request, and record
// the file and class name for it.
spl_autoload_register(__NAMESPACE__.'\Autoload::load', true, true);
}//end if