Method doExecute

/**
 * Internal function to execute the command.
 *
 * @param   InputInterface   $input   The input to inject into the command.
 * @param   OutputInterface  $output  The output to inject into the command.
 *
 * @return  integer  The command exit code
 *
 * @since   4.0.0
 */
protected function doExecute(InputInterface $input, OutputInterface $output) : int
{
    $this->configureIO($input, $output);
    $extensions = $this->getExtensions();
    $state = -1;
    $discovered_extensions = $this->filterExtensionsBasedOnState($extensions, $state);
    if (empty($discovered_extensions)) {
        $this->ioStyle->note("There are no pending discovered extensions to install. Perhaps you need to run extension:discover first?");
        return Command::SUCCESS;
    }
    $discovered_extensions = $this->getExtensionsNameAndId($discovered_extensions);
    $this->ioStyle->title('Discovered extensions.');
    $this->ioStyle->table(['Name', 'Extension ID', 'Version', 'Type', 'Active'], $discovered_extensions);
    return Command::SUCCESS;
}