#!/usr/bin/env runhaskell

import System.Directory.Tree
import Data.List

main :: IO ()
main = readDirectory "." >>= putStrLn . genHostFile

genHostFile :: AnchoredDirTree String -> String
genHostFile (_ :/ (Dir _ contents)) = "{\n" ++ entries ++ "\n}\n"
  where
    entries = concat $ [genEntry name content | (File name content) <- contents, name `notElem` hidden]
    genEntry fileName fileContent = unlines . indent $ [ "\"" ++ fileName ++ "\" = ''" ] ++ indent (lines fileContent) ++ [ "'';" ]
    hidden = [ "hosts.nix"
             ]

indent :: [String] -> [String]
indent = map ("  " ++)