private function downloadNewVersion()
    {
        // check for permissions in local filesystem before start downloading files
        if (!is_writable($this->currentInstallerFile)) {
            throw new IOException('Symfony Installer update failed: the "'.$this->currentInstallerFile.'" file could not be written');
        }

        if (!is_writable($this->tempDir)) {
            throw new IOException('Symfony Installer update failed: the "'.$this->tempDir.'" directory used to download files temporarily could not be written');
        }

        if (false === $newInstaller = $this->getUrlContents($this->remoteInstallerFile)) {
            throw new \RuntimeException('The new version of the Symfony Installer couldn\'t be downloaded from the server.');
        }

        $newInstallerPermissions = $this->currentInstallerFile ? fileperms($this->currentInstallerFile) : 0777 & ~umask();
        $this->fs->dumpFile($this->newInstallerFile, $newInstaller, $newInstallerPermissions);

        return $this;
    }
private function downloadNewVersion()
    {
        // check for permissions in local filesystem before start downloading files
        if (!is_writable($this->currentInstallerFile)) {
            throw new IOException('Symfony Installer update failed: the "'.$this->currentInstallerFile.'" file could not be written');
        }

        if (!is_writable($this->tempDir)) {
            throw new IOException('Symfony Installer update failed: the "'.$this->tempDir.'" directory used to download files temporarily could not be written');
        }

        if (false === $newInstaller = $this->getUrlContents($this->remoteInstallerFile)) {
            throw new \RuntimeException('The new version of the Symfony Installer couldn\'t be downloaded from the server.');
        }

        $newInstallerPermissions = $this->currentInstallerFile ? fileperms($this->currentInstallerFile) : 0777 & ~umask();
        $this->fs->dumpFile($this->newInstallerFile, $newInstaller, $newInstallerPermissions);

        return $this;
    }
private function downloadNewVersion ( ) { // check for permissions in local filesystem before start downloading files if ( ! is_writable ( $ this -> currentInstallerFile ) ) { throw new IOException ( 'Symfony Installer update failed: the "' . $ this -> currentInstallerFile . '" file could not be written' ) ; } if ( ! is_writable ( $ this -> tempDir ) ) { throw new IOException ( 'Symfony Installer update failed: the "' . $ this -> tempDir . '" directory used to download files temporarily could not be written' ) ; } if ( false === $ newInstaller = $ this -> getUrlContents ( $ this -> remoteInstallerFile ) ) { throw new \ RuntimeException ( 'The new version of the Symfony Installer couldn\'t be downloaded from the server.' ) ; } $ newInstallerPermissions = $ this -> currentInstallerFile ? fileperms ( $ this -> currentInstallerFile ) : 0777 & ~ umask ( ) ; $ this -> fs -> dumpFile ( $ this -> newInstallerFile , $ newInstaller , $ newInstallerPermissions ) ; return $ this ; }
Downloads the new version of the Symfony installer.

@return $this
Downloads the new version of the Symfony installer .