addDependentFile

External.hs

module External where

import Language.Haskell.TH.Syntax
import Language.Haskell.TH.Lib

loadStringFromFile :: Q Exp 
loadStringFromFile = do
  let externalDependency = "external.txt"
  qAddDependentFile externalDependency
  s <- qRunIO $ readFile externalDependency
  stringE s

external.txt

Change Me!

main.hs

-- main.hs
{-# LANGUAGE TemplateHaskell #-}
module Main where
import External (loadStringFromFile)

main :: IO ()
main = putStrLn $loadStringFromFile