Can't set strategy options at runtime

[alexgleason]

Steps to Reproduce

1. Configure a strategy at runtime, eg:

config :ueberauth, Ueberauth,
  providers: [
    keycloak: {Ueberauth.Strategy.Keycloak, [uid_field: :email, default_scope: "openid profile"]}
  ]

2. Try to log in.
3. The default_scope still uses the default from the strategy.

Expected Result

Calling Ueberauth.Strategy.Helpers.options/1 always returns the current options at runtime.

Actual Result

Strategy options are set at compile time and runtime configuration isn't respected.

[mustela]

Having the same issue... has anyone have any tip to configure it in runtime? Thanks!

[grzuy]

It appears the issue is the providers: setting is read only in init/1, and normally phoenix/plug init_mode is :compile in production.

A workaround to make just ueberauth read settings at run-time is to write a plug wrapper (based on https://akoutmos.com/post/plug-runtime-config/):

defmodule YourApp.Ueberauth do
  @behaviour Plug

  @impl true
  def init(opts) do
    opts
  end

  @impl true
  def call(conn, opts) do
    conn
    |> Ueberauth.call(Ueberauth.init(opts))
  end
end

and in your Auth controller

  plug YourApp.Ueberauth