BackendTask.Env

Because BackendTask's in elm-pages never run in the browser (see the BackendTask docs), you can access environment variables securely. As long as the environment variable isn't sent down into the final Data value, it won't end up in the client!

import BackendTask exposing (BackendTask)
import BackendTask.Env

type alias EnvVariables =
    { sendGridKey : String
    , siteUrl : String
    }

sendEmail : Email -> BackendTask ()
sendEmail email =
    BackendTask.map2 EnvVariables
        (BackendTask.Env.expect "SEND_GRID_KEY")
        (BackendTask.Env.get "BASE_URL"
            |> BackendTask.map (Maybe.withDefault "http://localhost:1234")
        )
        |> BackendTask.andThen (sendEmailBackendTask email)

sendEmailBackendTask : Email -> EnvVariables -> BackendTask ()
sendEmailBackendTask email envVariables =
    Debug.todo "Not defined here"
get : String -> BackendTask error (Maybe String)

Get an environment variable, or Nothing if there is no environment variable matching that name.

expect : String -> BackendTask (Catchable Error) String

Get an environment variable, or a BackendTask failure if there is no environment variable matching that name.

Errors

type Error
= MissingEnvVariable String