private function getCurrentGitHash()
{
// we should not use 'git' executable unless we are in a git clone
if (!SettingsPiwik::isGitDeployment()) {
return 'WARN: it does not look like a Piwik repository clone - you must setup Piwik from git to proceed';
}
$gitCmd = 'git -C ' . escapeshellarg(PIWIK_INCLUDE_PATH) . ' rev-parse HEAD';
return trim(shell_exec($gitCmd));
}