/usr/share/php/Nette/DI/ContainerLoader.php is in php-nette 2.3.8-1ubuntu1.
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;
/**
* DI container loader.
*/
class ContainerLoader extends Nette\Object
{
/** @var bool */
private $autoRebuild = FALSE;
/** @var string */
private $tempDirectory;
public function __construct($tempDirectory, $autoRebuild = FALSE)
{
$this->tempDirectory = $tempDirectory;
$this->autoRebuild = $autoRebuild;
}
/**
* @param mixed
* @param callable function (Nette\DI\Compiler $compiler): string|NULL
* @return string
*/
public function load($key, $generator)
{
$class = $this->getClassName($key);
if (!class_exists($class, FALSE)) {
$this->loadFile($class, $generator);
}
return $class;
}
/**
* @return string
*/
public function getClassName($key)
{
return 'Container_' . substr(md5(serialize($key)), 0, 10);
}
/**
* @return void
*/
private function loadFile($class, $generator)
{
$file = "$this->tempDirectory/$class.php";
if (!$this->isExpired($file) && (@include $file) !== FALSE) { // @ file may not exist
return;
}
if (!is_dir($this->tempDirectory)) {
@mkdir($this->tempDirectory); // @ - directory may already exist
}
$handle = fopen("$file.lock", 'c+');
if (!$handle || !flock($handle, LOCK_EX)) {
throw new Nette\IOException("Unable to acquire exclusive lock on '$file.lock'.");
}
if (!is_file($file) || $this->isExpired($file)) {
list($toWrite[$file], $toWrite["$file.meta"]) = $this->generate($class, $generator);
foreach ($toWrite as $name => $content) {
if (file_put_contents("$name.tmp", $content) !== strlen($content) || !rename("$name.tmp", $name)) {
@unlink("$name.tmp"); // @ - file may not exist
throw new Nette\IOException("Unable to create file '$name'.");
}
}
}
if ((@include $file) === FALSE) { // @ - error escalated to exception
throw new Nette\IOException("Unable to include '$file'.");
}
flock($handle, LOCK_UN);
}
private function isExpired($file)
{
if ($this->autoRebuild) {
$meta = @unserialize(file_get_contents("$file.meta")); // @ - file may not exist
$files = $meta ? array_combine($tmp = array_keys($meta), $tmp) : array();
return $meta !== @array_map('filemtime', $files); // @ - files may not exist
}
return FALSE;
}
/**
* @return array of (code, file[])
*/
protected function generate($class, $generator)
{
$compiler = new Compiler;
$compiler->getContainerBuilder()->setClassName($class);
$code = call_user_func_array($generator, array(& $compiler));
$code = $code ?: implode("\n\n\n", $compiler->compile());
$files = $compiler->getDependencies();
$files = $files ? array_combine($files, $files) : array(); // workaround for PHP 5.3 array_combine
return array(
"<?php\n$code",
serialize(@array_map('filemtime', $files)), // @ - file may not exist
);
}
}
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