Include the value of an environment variable in the binary at compile time.

Rationale

Users might want to embed secrets (e.g. API keys, database connection strings) inside production artifacts without checking these into the repository.

Example

import IncludeEnv.TH (includeEnv)

$(includeEnv "SHELL" "shl")
shl :: String

main :: IO ()
main = putStrLn $ unwords ["your current shell :", shl]