44 lines
1.4 KiB
Haskell
44 lines
1.4 KiB
Haskell
{- git-annex main program -}
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import Control.Exception
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import System.IO
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import System.Environment
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import qualified Annex
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import Types
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import Core
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import Commands
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main = do
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args <- getArgs
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(mode, params) <- argvToMode args
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state <- start
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tryRun state mode params
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{- Processes each param in the list by dispatching the handler function
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- for the user-selection operation mode. Catches exceptions, not stopping
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- if some error out, and propigates an overall error status at the end.
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-
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- This runs in the IO monad, not in the Annex monad. It seems that
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- exceptions can only be caught in the IO monad, not in a stacked monad;
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- or more likely I missed an easy way to do it. So, I have to laboriously
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- thread AnnexState through this function.
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-}
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tryRun :: AnnexState -> Mode -> [String] -> IO ()
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tryRun state mode params = tryRun' state mode 0 0 params
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tryRun' state mode errnum oknum (f:fs) = do
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result <- try
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(Annex.run state (dispatch mode f))::IO (Either SomeException ((), AnnexState))
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case (result) of
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Left err -> do
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showErr err
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tryRun' state mode (errnum + 1) oknum fs
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Right (_,state') -> tryRun' state' mode errnum (oknum + 1) fs
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tryRun' state mode errnum oknum [] = do
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if (errnum > 0)
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then error $ (show errnum) ++ " failed ; " ++ show (oknum) ++ " ok"
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else return ()
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{- Exception pretty-printing. -}
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showErr e = do
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hPutStrLn stderr $ "git-annex: " ++ (show e)
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return ()
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