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<?php
/**
 * Git blame report for PHP_CodeSniffer.
 *
 * @author    Ben Selby <benmatselby@gmail.com>
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Reports;

use PHP_CodeSniffer\Exceptions\DeepExitException;

class Gitblame extends VersionControl
{

/**
     * The name of the report we want in the output
     *
     * @var string
     */
    protected $reportName = 'GIT';

/**
     * Extract the author from a blame line.
     *
     * @param string $line Line to parse.
     *
     * @return mixed string or false if impossible to recover.
     */
    protected function getAuthor($line)
    {
        $blameParts = [];
        $line       = preg_replace('|\s+|', ' ', $line);
        preg_match(
            '|$.+[0-9]{4}-[0-9]{2}-[0-9]{2}\s+[0-9]+$|',
            $line,
            $blameParts
        );

if (isset($blameParts[0]) === false) {
            return false;
        }

$parts = explode(' ', $blameParts[0]);

if (count($parts) < 2) {
            return false;
        }

$parts  = array_slice($parts, 0, (count($parts) - 2));
        $author = preg_replace('|\(|', '', implode(' ', $parts));
        return $author;

}//end getAuthor()

/**
     * Gets the blame output.
     *
     * @param string $filename File to blame.
     *
     * @return array
     * @throws \PHP_CodeSniffer\Exceptions\DeepExitException
     */
    protected function getBlameContent($filename)
    {
        $cwd = getcwd();

chdir(dirname($filename));
        $command = 'git blame --date=short "'.basename($filename).'" 2>&1';
        $handle  = popen($command, 'r');
        if ($handle === false) {
            $error = 'ERROR: Could not execute "'.$command.'"'.PHP_EOL.PHP_EOL;
            throw new DeepExitException($error, 3);
        }

$rawContent = stream_get_contents($handle);
        pclose($handle);

$blames = explode("\n", $rawContent);
        chdir($cwd);

return $blames;

}//end getBlameContent()

}//end class

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