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Tomas Votruba:
How to Load --config With Services in Symfony Console
May 15, 2018 @ 09:11:43

On his site Tomas Votruba continues his look at the Symfony/Console component of the Symfony framework. In this latest article he walks through the loading of configuration options from a file provided by a --config option on the command line.

PHP CLI apps usually accept config, to setup their behavior. For PHPUnit it's phpunit.xml, for PHP CS Fixer it's .php_cs, for EasyCodingStandard it's easy-coding-standard.yml, for PHPStan it's phpstan.neon and so on.

In the first post about PHP CLI Apps I wrote about poor DI support in PHP CLI projects.

Today we look on the first barrier that leads most people to prefer static over DI - how to load config with services.

He starts off talking about the "chicken and egg" issue when it comes to loading configuration: needing a configuration to create an Application instance which then needs the config (and so on...). He then walks through three possible solutions:

  1. Not using a container to manage dependencies for the application
  2. Setting up a container in a command
  3. Using the ArgvInput input helper to pull directly from the arguments

He gets into more detail on this last method, providing code examples and input/output examples of it in use. Unfortunately this method also introduces some undesired dependencies between commands. He finishes the post with an alternative: setting up option definitions in the getDefaultInputDefinition method of the main application and having them available to all commands.

tagged: symfony console service argument commandline tutorial application

Link: https://www.tomasvotruba.cz/blog/2018/05/14/how-to-load-config-with-services-in-symfony-console/