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module GF.Command.Interpreter (
CommandEnv (..),
mkCommandEnv,
interpretCommandLine
) where
import GF.Command.Commands
import GF.Command.Abstract
import GF.Command.Parse
import PGF
import PGF.Data
import PGF.Macros
import GF.System.Signal
import GF.Infra.UseIO
import GF.Data.ErrM ----
import qualified Data.Map as Map
data CommandEnv = CommandEnv {
multigrammar :: PGF,
commands :: Map.Map String CommandInfo
}
mkCommandEnv :: PGF -> CommandEnv
mkCommandEnv pgf = CommandEnv pgf (allCommands pgf)
interpretCommandLine :: CommandEnv -> String -> IO ()
interpretCommandLine env line =
case readCommandLine line of
Just [] -> return ()
Just pipes -> do res <- runInterruptibly (mapM_ interPipe pipes)
case res of
Left ex -> putStrLnFlush (show ex)
Right x -> return x
Nothing -> putStrLnFlush "command not parsed"
where
interPipe cs = do
(_,s) <- intercs ([],"") cs
putStrLnFlush s
intercs treess [] = return treess
intercs (trees,_) (c:cs) = do
treess2 <- interc trees c
intercs treess2 cs
interc = interpret env
-- return the trees to be sent in pipe, and the output possibly printed
interpret :: CommandEnv -> [Exp] -> Command -> IO CommandOutput
interpret env trees0 comm = case lookCommand co comms of
Just info -> do
checkOpts info
tss@(_,s) <- exec info opts trees
optTrace s
return tss
_ -> do
putStrLn $ "command " ++ co ++ " not interpreted"
return ([],[])
where
optTrace = if isOpt "tr" opts then putStrLn else const (return ())
(co,opts,trees) = getCommand comm trees0
comms = commands env
checkOpts info =
case
[o | OOpt o <- opts, notElem o ("tr" : options info)] ++
[o | OFlag o _ <- opts, notElem o (flags info)]
of
[] -> return ()
[o] -> putStrLn $ "option not interpreted: " ++ o
os -> putStrLn $ "options not interpreted: " ++ unwords os
-- analyse command parse tree to a uniform datastructure, normalizing comm name
getCommand :: Command -> [Exp] -> (String,[Option],[Exp])
getCommand co ts = case co of
Command c opts (AExp t) -> (getOp c,opts,[t]) -- ignore piped
Command c opts ANoArg -> (getOp c,opts,ts) -- use piped
where
-- abbreviation convention from gf
getOp s = case break (=='_') s of
(a:_,_:b:_) -> [a,b] -- axx_byy --> ab
_ -> case s of
[a,b] -> s -- ab --> ab
a:_ -> [a] -- axx --> a
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