/**
* Load a repository containing available upgrades.
*
* @return null|RepositoryInterface
*/
private function getUpgradeRepository()
{
$upgradeFile = $this->getTensideDataDir() . DIRECTORY_SEPARATOR . 'upgrades.json';
if (!file_exists($upgradeFile)) {
return null;
}
$packageLoader = new ArrayLoader();
$packageChanges = new WritableArrayRepository();
$upgrades = new JsonFile($upgradeFile, null);
foreach ($upgrades->getEntries('/') as $packageName) {
if ($pkgData = $upgrades->get($packageName . '/target')) {
$packageChanges->addPackage($packageLoader->load($pkgData));
}
}
return $packageChanges;
}
