Idris2/tests/node/node020/Popen.idr

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Idris
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2020-06-12 23:35:08 +03:00
import System
import System.File
import System.Info
import Data.Strings
windowsPath : String -> String
windowsPath path =
let replaceSlashes : List Char -> List Char
replaceSlashes [] = []
replaceSlashes ('/' :: cs) = '\\' :: replaceSlashes cs
replaceSlashes (c :: cs) = c :: replaceSlashes cs
in
pack $ replaceSlashes (unpack path)
main : IO ()
main = do
Just cmd <- getEnv "POPEN_CMD"
| Nothing => putStrLn "POPEN_CMD env var not set"
let cmd = if isWindows then windowsPath cmd else cmd
Right fh <- popen cmd Read
| Left err => printLn err
putStrLn "opened"
Right output <- fGetLine fh
| Left err => printLn err
pclose fh
putStrLn "closed"
let [idris2, _] = split ((==) ',') output
| _ => printLn "Unexpected result"
putStrLn idris2