118 lines
3.5 KiB
Haskell
118 lines
3.5 KiB
Haskell
{-# LANGUAGE DeriveDataTypeable #-}
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module Main where
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import Browse
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import Check
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import Control.Applicative
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import Control.Exception
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import Data.Typeable
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import Lang
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import Lint
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import List
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import Prelude
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import System.Console.GetOpt
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import System.Directory
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import System.Environment (getArgs)
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import System.IO (hPutStr, hPutStrLn, stderr)
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import Types
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----------------------------------------------------------------
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usage :: String
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usage = "ghc-mod version 0.4.4\n"
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++ "Usage:\n"
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++ "\t ghc-mod [-l] list\n"
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++ "\t ghc-mod [-l] lang\n"
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++ "\t ghc-mod [-l] browse <module> [<module> ...]\n"
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++ "\t ghc-mod check <HaskellFile>\n"
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++ "\t ghc-mod [-h opt] lint <HaskellFile>\n"
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++ "\t ghc-mod boot\n"
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++ "\t ghc-mod help\n"
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----------------------------------------------------------------
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defaultOptions :: Options
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defaultOptions = Options {
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convert = toPlain
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, hlintOpts = []
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}
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argspec :: [OptDescr (Options -> Options)]
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argspec = [ Option "l" ["tolisp"]
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(NoArg (\opts -> opts { convert = toLisp }))
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"print as a list of Lisp"
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, Option "h" ["hlintOpt"]
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(ReqArg (\h opts -> opts { hlintOpts = h : hlintOpts opts }) "hlintOpt")
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"hint to be ignored"
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]
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parseArgs :: [OptDescr (Options -> Options)] -> [String] -> (Options, [String])
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parseArgs spec argv
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= case getOpt Permute spec argv of
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(o,n,[] ) -> (foldl (flip id) defaultOptions o, n)
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(_,_,errs) -> throw (CmdArg errs)
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----------------------------------------------------------------
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data GHCModError = SafeList
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| NoSuchCommand String
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| CmdArg [String]
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| FileNotExist String deriving (Show, Typeable)
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instance Exception GHCModError
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----------------------------------------------------------------
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main :: IO ()
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main = flip catches handlers $ do
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args <- getArgs
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let (opt,cmdArg) = parseArgs argspec args
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res <- case safelist cmdArg 0 of
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"browse" -> concat <$> mapM (browseModule opt) (tail cmdArg)
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"list" -> listModules opt
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"check" -> withFile (checkSyntax opt) (safelist cmdArg 1)
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"lint" -> withFile (lintSyntax opt) (safelist cmdArg 1)
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"lang" -> listLanguages opt
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"boot" -> do
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mods <- listModules opt
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langs <- listLanguages opt
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pre <- browseModule opt "Prelude"
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return $ mods ++ langs ++ pre
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cmd -> throw (NoSuchCommand cmd)
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putStr res
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where
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handlers = [Handler handler1, Handler handler2]
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handler1 :: ErrorCall -> IO ()
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handler1 e = print e -- for debug
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handler2 :: GHCModError -> IO ()
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handler2 SafeList = printUsage
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handler2 (NoSuchCommand cmd) = do
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hPutStrLn stderr $ "\"" ++ cmd ++ "\" not supported"
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printUsage
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handler2 (CmdArg errs) = do
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mapM_ (hPutStr stderr) errs
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printUsage
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handler2 (FileNotExist file) = do
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hPutStrLn stderr $ "\"" ++ file ++ "\" not found"
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printUsage
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printUsage = hPutStrLn stderr $ "\n" ++ usageInfo usage argspec
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withFile cmd file = do
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exist <- doesFileExist file
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if exist
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then cmd file
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else throw (FileNotExist file)
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safelist xs idx
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| length xs <= idx = throw SafeList
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| otherwise = xs !! idx
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----------------------------------------------------------------
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toLisp :: [String] -> String
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toLisp ms = "(" ++ unwords quoted ++ ")\n"
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where
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quote x = "\"" ++ x ++ "\""
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quoted = map quote ms
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toPlain :: [String] -> String
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toPlain = unlines
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