/**
* Creates a new install info.
*
* @param string $packageName The package name. Must be a non-empty string.
* @param string $installPath The path where the package is installed.
* If a relative path is given, the path is
* assumed to be relative to the install path
* of the root package.
*
* @throws InvalidArgumentException If any of the arguments is invalid.
*/
public function __construct($packageName, $installPath)
{
Assert::packageName($packageName);
Assert::systemPath($installPath);
$this->packageName = $packageName;
$this->installPath = $installPath;
}