blob: 978cafc1522a9b9d9e26a015b1b4dba86ad7e09e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
module Main (main) where
import System.Environment
import Control.Monad.Except
import Control.Monad.Reader
import System.Console.Haskeline
import Types
import Lib
parseArgs :: Config -> [String] -> Config
parseArgs config args =
case args of
("-i":fileName:rest) -> parseArgs
config { configScriptFileName = Just fileName } rest
("-v":rest) -> parseArgs
config { configVerboseMode = True } rest
("-h":rest) -> parseArgs
config { configShowHelp = True } rest
_ -> config
repl :: Config -> InputT IO ()
repl config = do
minput <- getInputLine "> "
case minput of
Nothing -> return ()
Just input -> do
result <- lift $ runExceptT $ runReaderT (runInlineScript input) config
case result of
Left (LException ex) -> outputStrLn $ "Error: " ++ ex
Right () -> return ()
repl config
main :: IO ()
main = do
args <- getArgs
progName <- getProgName
let initialConfig = Config {
configScriptFileName = Nothing,
configVerboseMode = False,
configShowHelp = False
}
let config = parseArgs initialConfig args
if (configShowHelp config) then do
putStrLn $ "Usage: " ++ progName ++ " # to open REPL"
putStrLn $ " " ++ progName ++ " -i scriptFile # to run script file"
putStrLn $ " " ++ progName ++ " -h # to show this help"
else do
when (configVerboseMode config) $ do
putStrLn $ "configScriptFileName:\t" ++ (show $ configScriptFileName config)
putStrLn $ "configVerboseMode:\t" ++ (show $ configVerboseMode config)
case (configScriptFileName config) of
Just scriptFileName -> do
result <- runExceptT $ runReaderT (runScriptFile scriptFileName) config
case result of
Left (LException ex) -> putStrLn $ "Error: " ++ ex
Right () -> return ()
Nothing -> do
putStrLn $ "Lang REPL"
putStrLn $ "Use CTRL+D to exit"
runInputT defaultSettings (repl config)
return ()
|
