forked from bortzmeyer/GaBuZoMeu
88 lines
2.8 KiB
Haskell
88 lines
2.8 KiB
Haskell
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import qualified System.IO
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import qualified System.Environment
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import qualified Data.List as List
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import qualified System.Exit as Exit
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import qualified System.Console.GetOpt as GetOpt
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import Registry.Grammar
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import Registry.Types
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import Registry.Registry
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nothing = putStr ""
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-- Options handling
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data Flag
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= Verbose | Help deriving Show
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options :: [GetOpt.OptDescr Flag]
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options =
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[ GetOpt.Option ['v'] ["verbose"] (GetOpt.NoArg Verbose) "Detailed output",
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GetOpt.Option ['h'] ["help"] (GetOpt.NoArg Help) "Help message"
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]
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data OptionStore = ProgramOptions {verbose::Bool, help::Bool}
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header = do
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myself <- System.Environment.getProgName
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return ("Usage: " ++ myself ++ " [-v] registry-file")
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fatal detailed msg = do
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myheader <- header
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if detailed then
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System.IO.hPutStrLn System.IO.stderr (GetOpt.usageInfo myheader options)
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else
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System.IO.hPutStrLn System.IO.stderr (myheader)
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if msg /= "" then
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System.IO.hPutStrLn System.IO.stderr msg
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else
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nothing
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Exit.exitWith (Exit.ExitFailure 1)
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-- Defaults
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emptyOptionStore :: OptionStore
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emptyOptionStore =
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ProgramOptions {verbose = False, help = False}
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processFlags :: [Flag] -> OptionStore
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processFlags [] = emptyOptionStore
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processFlags (first : rest) =
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case first of
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Verbose -> restOpts { verbose = True }
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Help -> restOpts { help = True }
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where restOpts = processFlags rest
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programOpts :: [String] -> IO ([Flag], [String])
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programOpts argv =
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case GetOpt.getOpt GetOpt.Permute options argv of
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(o,n,[] ) -> return(o,n)
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(_,_,errs) -> fatal True (concat errs)
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getOptionStore :: ([Flag], [String]) -> OptionStore
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getOptionStore (f, n) = processFlags f
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--
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main = do
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myargs <- System.Environment.getArgs
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results <- programOpts myargs
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let opts = getOptionStore results
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let args = snd results
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if help opts then
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fatal True ""
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else
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nothing
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if length (args) /= 1 then
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fatal False "One and only one argument accepted"
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else
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nothing
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let registryfilename = args !! 0
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input <- System.IO.readFile registryfilename
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let syntaxTree = parse input
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if (checkOK syntaxTree) then do
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let result = semanticCheck (registryOf syntaxTree)
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if (checkOK result) then do
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if verbose opts then
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putStrLn (registryfilename ++ " is OK") -- TODO: display the date
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else
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nothing
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Exit.exitWith Exit.ExitSuccess
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else do
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putStrLn ("Semantic error in " ++ registryfilename ++ ": " ++
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(messageOf result))
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Exit.exitWith (Exit.ExitFailure 3)
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else do
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putStrLn ("Syntax error in " ++ registryfilename ++ ": " ++
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(messageOf syntaxTree))
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Exit.exitWith (Exit.ExitFailure 2) |