Silverstripe env variable value in config

Question

I am trying to figure out if SilverStripe 4.2 supports referencing environment variables in the config files in a similar fashion Symfony does.

So far I was able to find the class responsible for building configs, which doesn't seem to have this functionality.

I thought of injecting another layer that would parse the YAML files and process the environment references, but it seems that you cannot extend a service since there is no Dependency Injection container available?

Is there maybe a different way to do this? All that I am trying to do is use environment variables in YAML config files.

Answer 1

You can use environment variables in YAML config provided it's config for the Injector class. You can't use them outside of Injector config (as of 4.2).

You can wrap them in backticks for them to be parsed into config:

SilverStripe\Core\Injector\Injector:
  MyServiceClass:
    properties:
      MyProperty: '`ENV_VAR_HERE`'