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<?php
/**
* Loose - provides a 'loose object' object
*
* PHP version 5.3
*
* @category Git
* @package Granite
* @author Craig Roberts <craig0990@googlemail.com>
* @license http://www.opensource.org/licenses/mit-license.php MIT Expat License
* @link http://craig0990.github.com/Granite/
*/
namespace Granite\Git\Object;
use \UnexpectedValueException as UnexpectedValueException;
/**
* Loose represents a loose object in the Git repository
*
* @category Git
* @package Granite
* @author Craig Roberts <craig0990@googlemail.com>
* @license http://www.opensource.org/licenses/mit-license.php MIT Expat License
* @link http://craig0990.github.com/Granite/
*/
class Loose extends Raw
{
/**
* Reads an object from a loose object file based on the SHA-1 id
*
* @param string $path The path to the repository root
* @param string $sha The SHA-1 id of the requested object
*
* @throws UnexpectedValueException If the type is not 'commit', 'tree',
* 'tag' or 'blob'
*/
public function __construct($path, $sha)
{
$this->sha = $sha;
$loose_path = $path
. 'objects/'
. substr($sha, 0, 2)
. '/'
. substr($sha, 2);
if (!file_exists($loose_path)) {
throw new InvalidArgumentException("Cannot open loose object file for $sha");
}
$raw = gzuncompress(file_get_contents($loose_path));
$data = explode("\0", $raw, 2);
$header = $data[0];
$this->content = $data[1];
list($this->type, $this->size) = explode(' ', $header);
switch ($this->type) {
case 'commit':
$this->type = Raw::OBJ_COMMIT;
break;
case 'tree':
$this->type = Raw::OBJ_TREE;
break;
case 'blob':
$this->type = Raw::OBJ_BLOB;
break;
case 'tag':
$this->type = Raw::OBJ_TAG;
break;
default:
throw new UnexpectedValueException(
"Unexpected type '{$this->type}'"
);
break;
}
}
}
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