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<?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;
/**
* @author Wissem Riahi <wissemr@gmail.com>
*/
class Tar
{
/**
* @param string $pathToArchive
*
* @return string|null
*/
public static function getComposerJson($pathToArchive)
{
$phar = new \PharData($pathToArchive);
if (!$phar->valid()) {
return null;
}
return self::extractComposerJsonFromFolder($phar);
}
/**
* @param \PharData $phar
*
* @throws \RuntimeException
*
* @return string
*/
private static function extractComposerJsonFromFolder(\PharData $phar)
{
if (isset($phar['composer.json'])) {
return $phar['composer.json']->getContent();
}
$topLevelPaths = array();
foreach ($phar as $folderFile) {
$name = $folderFile->getBasename();
if ($folderFile->isDir()) {
$topLevelPaths[$name] = true;
if (\count($topLevelPaths) > 1) {
throw new \RuntimeException('Archive has more than one top level directories, and no composer.json was found on the top level, so it\'s an invalid archive. Top level paths found were: '.implode(',', array_keys($topLevelPaths)));
}
}
}
$composerJsonPath = key($topLevelPaths).'/composer.json';
if ($topLevelPaths && isset($phar[$composerJsonPath])) {
return $phar[$composerJsonPath]->getContent();
}
throw new \RuntimeException('No composer.json found either at the top level or within the topmost directory');
}
}
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