Load dynamic values from system env

[rafaeljesus]

The current code does not load dynamic env var using :system

config :sentry,
  dsn: {:system, "SENTRY_DNS"},

This is useful when deploying in production environment using exrm.

I would appreciate this feature asap as I am not receiving errors on my Sentry account or if you have any other suggestion please let me now,

Thank guys

[mitchellhenke]

I don't have a huge amount of experience with exrm/distillery, so please correct me if I'm off. My understanding is that for libraries supporting the {:system, "CONFIG_KEY"} convention, when the release is built, it will store that tuple normally without fetching from System. Upon the release being run, the library will see that pattern, and read from the config at runtime.

I believe Phoenix only supports it for a couple parts of the configuration (PORT and HOST). Would adding it for the dsn be sufficient, or would it be necessary for all configuration keys?

Also, thank you for creating this issue 🙂

[rafaeljesus]

@mitchellhenke Thank you for your reply! Yes that's the behavior mate. I also request it on ex_statsd I can totally submit a PR you you want, wdyt?

[mitchellhenke]

@rafaeljesus cool, sounds good. I can likely get to it this week.