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<?php declare(strict_types=1); namespace Psl\Filesystem; use Psl\Internal; use Psl\Str; use function readlink; /** * Returns the target of a symbolic link. * * @param non-empty-string $symbolic_link * * @throws Exception\NotFoundException If $symbolic_link is not found. * @throws Exception\NotSymbolicLinkException If $symbolic_link is not a symbolic link. * @throws Exception\RuntimeException If unable to retrieve the target of $symbolic_link. * * @return non-empty-string */ function read_symbolic_link(string $symbolic_link): string { if (!namespace\exists($symbolic_link)) { throw Exception\NotFoundException::forSymbolicLink($symbolic_link); } if (!namespace\is_symbolic_link($symbolic_link)) { throw Exception\NotSymbolicLinkException::for($symbolic_link); } [$result, $message] = Internal\box( /** * @return false|string */ static fn() => readlink($symbolic_link) ); // @codeCoverageIgnoreStart if (false === $result) { throw new Exception\RuntimeException(Str\format( 'Failed to retrieve the target of symbolic link "%s": %s', $symbolic_link, $message ?? 'internal error' )); } // @codeCoverageIgnoreEnd /** @var non-empty-string */ return $result; }
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