Piwik\Filesystem::getPathToPiwikRoot PHP Method

    public static function getPathToPiwikRoot()
    {
        return realpath(dirname(__FILE__) . "/..");
    }

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $piwikLanguages = \Piwik\Plugins\LanguagesManager\API::getInstance()->getAvailableLanguages();
     $aliasesUrl = 'https://raw.githubusercontent.com/unicode-cldr/cldr-core/master/supplemental/aliases.json';
     $aliasesData = Http::fetchRemoteFile($aliasesUrl);
     $aliasesData = json_decode($aliasesData, true);
     $aliasesData = $aliasesData['supplemental']['metadata']['alias']['languageAlias'];
     $writePath = Filesystem::getPathToPiwikRoot() . '/plugins/Intl/lang/%s.json';
     foreach ($piwikLanguages as $langCode) {
         if ($langCode == 'dev') {
             continue;
         }
         $requestLangCode = $transformedLangCode = $this->transformLangCode($langCode);
         if (array_key_exists($requestLangCode, $aliasesData)) {
             $requestLangCode = $aliasesData[$requestLangCode]['_replacement'];
         }
         // fix some locales
         $localFixes = array('pt' => 'pt-PT', 'pt-br' => 'pt', 'zh-cn' => 'zh-Hans', 'zh-tw' => 'zh-Hant');
         if (array_key_exists($langCode, $localFixes)) {
             $requestLangCode = $localFixes[$langCode];
         }
         setlocale(LC_ALL, $langCode);
         $translations = array();
         $this->fetchLanguageData($output, $transformedLangCode, $requestLangCode, $translations);
         $this->fetchTerritoryData($output, $transformedLangCode, $requestLangCode, $translations);
         $this->fetchCalendarData($output, $transformedLangCode, $requestLangCode, $translations);
         $this->fetchLayoutDirection($output, $transformedLangCode, $requestLangCode, $translations);
         $this->fetchUnitData($output, $transformedLangCode, $requestLangCode, $translations);
         $this->fetchNumberFormattingData($output, $transformedLangCode, $requestLangCode, $translations);
         ksort($translations['Intl']);
         file_put_contents(sprintf($writePath, $langCode), json_encode($translations, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
     }
 }