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Don't silently ignore superfluous command line arguments

This commit is contained in:
Niklas Hambüchen 2013-08-21 17:34:41 +09:00
parent 7fd7b36363
commit e7d746f115
1 changed files with 15 additions and 7 deletions
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22
src/GHCMod.hs
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@ -71,6 +71,7 @@ parseArgs spec argv
----------------------------------------------------------------
data GHCModError = SafeList
| TooManyArguments String
| NoSuchCommand String
| CmdArg [String]
| FileNotExist String deriving (Show, Typeable)
@ -94,15 +95,19 @@ main = flip catches handlers $ do
cmdArg2 = cmdArg !. 2
cmdArg3 = cmdArg !. 3
cmdArg4 = cmdArg !. 4
remainingArgs = tail cmdArg
nArgs n f = if length remainingArgs == n
then f
else throw (TooManyArguments cmdArg0)
res <- case cmdArg0 of
"browse" -> concat <$> mapM (browseModule opt) (tail cmdArg)
"browse" -> concat <$> mapM (browseModule opt) remainingArgs
"list" -> listModules opt
"check" -> checkSyntax opt cradle cmdArg1
"expand" -> checkSyntax opt { expandSplice = True } cradle cmdArg1
"debug" -> debugInfo opt cradle strVer cmdArg1
"type" -> typeExpr opt cradle cmdArg1 cmdArg2 (read cmdArg3) (read cmdArg4)
"info" -> infoExpr opt cradle cmdArg1 cmdArg2 cmdArg3
"lint" -> withFile (lintSyntax opt) cmdArg1
"check" -> nArgs 1 $ checkSyntax opt cradle cmdArg1
"expand" -> nArgs 1 $ checkSyntax opt { expandSplice = True } cradle cmdArg1
"debug" -> nArgs 1 $ debugInfo opt cradle strVer cmdArg1
"type" -> nArgs 4 $ typeExpr opt cradle cmdArg1 cmdArg2 (read cmdArg3) (read cmdArg4)
"info" -> nArgs 3 infoExpr opt cradle cmdArg1 cmdArg2 cmdArg3
"lint" -> nArgs 1 withFile (lintSyntax opt) cmdArg1
"lang" -> listLanguages opt
"flag" -> listFlags opt
"boot" -> do
@ -121,6 +126,9 @@ main = flip catches handlers $ do
handler1 = print -- for debug
handler2 :: GHCModError -> IO ()
handler2 SafeList = printUsage
handler2 (TooManyArguments cmd) = do
hPutStrLn stderr $ "\"" ++ cmd ++ "\": Too many arguments"
printUsage
handler2 (NoSuchCommand cmd) = do
hPutStrLn stderr $ "\"" ++ cmd ++ "\" not supported"
printUsage