How to add a new command line option to symfony console - symfony

Question

I am not an expert in Symfony, I need to add a new console option --country=XX to the symfony console.
This isnt a command, its an option which changes how whatever command is run, executes by selecting a different database to operate on by building the doctrine.dbal.dbname parameter such as api_fr, api_de, api_es, etc.
I have tried to search for a way to do this, but unfortunately everything comes back to adding commands, which is not what I want to do, I want to add an option.
I am building an API which part of it works with Symfony 2.8 and another part is using Symfony 3.x. I suppose the answer might be the same in both versions, but if you know how to do this in both versions and they are separate, please let me know.

Answer 1

You can add an EventListener like this exemple:
use Symfony\Component\Console\Input\InputOption;
class YourOptionEventListener
{
public function onConsoleCommand(ConsoleCommandEvent $event)
{
$inputDefinition = $event->getCommand()->getApplication()->getDefinition();
// add the option to the application's input definition
$inputDefinition->addOption(
new InputOption('yourOption', null, InputOption::VALUE_OPTIONAL, 'Description of the option', null)
);
}
}
Then add it as a service:
<?xml version="1.0" ?>
<container ...>
<services>
<service id="app_yourOption.console_event_listener"
class="App\YourOptionBundle\EventListener\YourOptionEventListener">
<tag name="kernel.event_listener" event="console.command" method="onConsoleCommand" />
</service>
</services>
</container>
You can check this documentation, in "Add a global command option" chapter, you can find what you need:
http://php-and-symfony.matthiasnoback.nl/2013/11/symfony2-add-a-global-option-to-console-commands-and-generate-pid-file/

Answer 2

The best practice of 2018 and Symfony 3+ is to extend Symfony Application:
<?php
use Symfony\Component\Console\Application;
use Symfony\Component\Console\Input\InputOption;
final class SomeApplication extends Application
{
protected function getDefaultInputDefinition()
{
$definition = parent::getDefaultInputDefinition();
$definition->addOption(new InputOption(
'country',
null,
InputOption::VALUE_REQUIRED,
'Country to use'
));
return $definition;
}
}
Then anywhere in your command or service with Symfony\Component\Console\Input\InputInterace service present, just call:
$country = $input->getOption('country');
Do you want to know more?
I've extended the answer in the 4 Ways to Add Global Option or Argument to Symfony Console Application post.