/usr/share/php/Nette/DI/DependencyChecker.php is in php-nette 2.4-20160731-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
namespace Nette\DI;
use Nette;
use ReflectionClass;
use ReflectionMethod;
/**
* Cache dependencies checker.
*/
class DependencyChecker
{
const VERSION = 1;
use Nette\SmartObject;
/** @var array of ReflectionClass|\ReflectionFunctionAbstract|string */
private $dependencies = [];
/**
* Adds dependencies to the list.
* @return self
*/
public function add(array $deps)
{
$this->dependencies = array_merge($this->dependencies, $deps);
return $this;
}
/**
* Exports dependencies.
* @return array
*/
public function export()
{
$files = $phpFiles = $classes = $functions = [];
foreach ($this->dependencies as $dep) {
if (is_string($dep)) {
$files[] = $dep;
} elseif ($dep instanceof ReflectionClass) {
if (empty($classes[$dep->getName()])) {
foreach (PhpReflection::getClassTree($dep) as $item) {
$phpFiles[] = (new ReflectionClass($item))->getFileName();
$classes[$item] = TRUE;
}
}
} elseif ($dep instanceof \ReflectionFunctionAbstract) {
$phpFiles[] = $dep->getFileName();
$functions[] = $dep instanceof ReflectionMethod ? $dep->getDeclaringClass()->getName() . '::' . $dep->getName() : $dep->getName();
} else {
throw new Nette\InvalidStateException('Unexpected dependency ' . gettype($dep));
}
}
$classes = array_keys($classes);
$functions = array_unique($functions, SORT_REGULAR);
$hash = self::calculateHash($classes, $functions);
$files = @array_map('filemtime', array_combine($files, $files)); // @ - file may not exist
$phpFiles = @array_map('filemtime', array_combine($phpFiles, $phpFiles)); // @ - file may not exist
return [self::VERSION, $files, $phpFiles, $classes, $functions, $hash];
}
/**
* Are dependencies expired?
* @return bool
*/
public static function isExpired($version, $files, $phpFiles, $classes, $functions, $hash)
{
$current = @array_map('filemtime', array_combine($tmp = array_keys($files), $tmp)); // @ - files may not exist
$currentClass = @array_map('filemtime', array_combine($tmp = array_keys($phpFiles), $tmp)); // @ - files may not exist
return $version !== self::VERSION
|| $files !== $current
|| ($phpFiles !== $currentClass && $hash !== self::calculateHash($classes, $functions));
}
private static function calculateHash($classes, $functions)
{
$hash = [];
foreach ($classes as $name) {
try {
$class = new ReflectionClass($name);
} catch (\ReflectionException $e) {
return;
}
$hash[] = [$name, PhpReflection::getUseStatements($class)];
foreach ($class->getProperties(\ReflectionProperty::IS_PUBLIC) as $prop) {
if ($prop->getDeclaringClass() == $class) { // intentionally ==
$hash[] = [$name, $prop->getName(), $prop->getDocComment()];
}
}
foreach ($class->getMethods(ReflectionMethod::IS_PUBLIC) as $method) {
if ($method->getDeclaringClass() == $class) { // intentionally ==
$hash[] = [
$name,
$method->getName(),
$method->getDocComment(),
self::hashParameters($method),
PHP_VERSION >= 70000 ? $method->getReturnType() : NULL
];
}
}
}
$flip = array_flip($classes);
foreach ($functions as $name) {
try {
$method = strpos($name, '::') ? new ReflectionMethod($name) : new \ReflectionFunction($name);
} catch (\ReflectionException $e) {
return;
}
$class = $method instanceof ReflectionMethod ? $method->getDeclaringClass() : NULL;
if ($class && isset($flip[$class->getName()])) {
continue;
}
$hash[] = [
$name,
$class ? PhpReflection::getUseStatements($method->getDeclaringClass()) : NULL,
$method->getDocComment(),
self::hashParameters($method),
PHP_VERSION >= 70000 ? $method->getReturnType() : NULL
];
}
return md5(serialize($hash));
}
private static function hashParameters(\ReflectionFunctionAbstract $method)
{
$res = [];
foreach ($method->getParameters() as $param) {
$res[] = [
$param->getName(),
PhpReflection::getParameterType($param),
$param->isDefaultValueAvailable()
? ($param->isDefaultValueConstant() ? $param->getDefaultValueConstantName() : [$param->getDefaultValue()])
: NULL
];
}
return $res;
}
}
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