ademenev
How to use an app as a dependency and reuse its config?
I have an application, lets call it A, that is in its own repo and has some configuration, and can run on its own. I want to create another application B that extends the functionality of A (A already provides some extension points). My idea is to use A as a dependency of B. The configuration of B must be inherited from A, so B can start it without having to redefine the config. Is it a good idea to just import A’s config into B’s config?
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derek-zhou
I’d just copy the config file content because:
- Eventually, the config will diverge.
- If their is a large part of config that is static, maybe it is better to refactor it into code.
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ademenev
So what’s the issue with this? Seems to work just fine
b/config/config.exs
import Config
import_config "../../a/config/config.exs"
b/mix.exs
defp deps do
[
{:a, path: "../a"}
]
end
If somewhere in A I am using for example Application.fetch_env!(:a, :x), then it works just fine when A is started both directly and as dependency of B. And B expectedly fails when I remove that import from its config
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