app\components\Git::updateRepo PHP Method

    public function updateRepo($branch = 'master', $gitDir = null)
    {
        $gitDir = $gitDir ?: Project::getDeployFromDir();
        $dotGit = rtrim($gitDir, '/') . '/.git';
        // 存在git目录，直接pull
        if (file_exists($dotGit)) {
            $cmd[] = sprintf('cd %s ', $gitDir);
            $cmd[] = sprintf('/usr/bin/env git checkout -q %s', $branch);
            $cmd[] = sprintf('/usr/bin/env git fetch -p -q --all');
            $cmd[] = sprintf('/usr/bin/env git reset -q --hard origin/%s', $branch);
            $command = join(' && ', $cmd);
            return $this->runLocalCommand($command);
        } else {
            $cmd[] = sprintf('mkdir -p %s ', $gitDir);
            $cmd[] = sprintf('cd %s ', $gitDir);
            $cmd[] = sprintf('/usr/bin/env git clone -q %s .', $this->getConfig()->repo_url);
            $cmd[] = sprintf('/usr/bin/env git checkout -q %s', $branch);
            $command = join(' && ', $cmd);
            return $this->runLocalCommand($command);
        }
    }