Make private clients schema_path work better for releases

[LostKobrakai]

Hardcoding a path to schemas at compile time doesn't work well when using releases. This change would allow for the following notation (used by many elixir libraries e.g. see Plug.Static) schemas_path: {:my_app, "priv/schemas"}, which is then at runtime converted to the proper path.

[Strech]

Provided values for the use statement in examples are just for demonstration purposes. If you want to have app_dir, feel free to use it

defmodule MyClient do
  use Avrora.Client,
    schemas_path: Application.app_dir(:my_elixir_app, "./path/to/schemas")
end

Or you can configure something under config/ folder and use it the same way in the example above ⬆️

[LostKobrakai]

That's what we tried, but that will be hardcoded into the module at compile time. Application.app_dir will run at compile time, which will not be the correct path if the release is moved elsewhere afterwards.

[mdwaud]

I can confirm the issue and that the proposed fix works.

[Strech]

release is moved elsewhere afterwards

~Another solution would be to expand the path in runtime, which will give you a semi-dynamic solution~. I don't like the idea to use app_dir because it requires to know app, which is not the knowledge library should have

UPD: I can take a look is there a way to add a dynamic resolution to the schemas_path

[Strech]

I will try to reproduce an issue. Is it correct that I will need to create a release (let's say distillery) and then I move the project to the docker in a different folder. Will it be enough to reproduce the issue?

[Strech]

@LostKobrakai @mdwaud I've tried to compile a project with distillery and every time I move the binary around it was working fine, the path was changing every time to path expanded from the new folder I run it.

I would like to ask you for help with a test setup that will show the issue, so far I can't reproduce it. Don't hesitate to open a new issue where we can discuss our approach 👍🏼