Avoid backtraces on expected failures when built with ghc 8; only use backtraces for unexpected errors.

ghc 8 added backtraces on uncaught errors. This is great, but git-annex was
using error in many places for a error message targeted at the user, in
some known problem case. A backtrace only confuses such a message, so omit it.

Notably, commands like git annex drop that failed due to eg, numcopies,
used to use error, so had a backtrace.

This commit was sponsored by Ethan Aubin.
This commit is contained in:
Joey Hess 2016-11-15 21:29:54 -04:00
parent 69915c6c9b
commit 0a4479b8ec
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116 changed files with 287 additions and 270 deletions

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@ -40,7 +40,7 @@ seek o = case batchOption o of
_ -> wrongnumparams
batchInput Right $ checker >=> batchResult
where
wrongnumparams = error "Wrong number of parameters"
wrongnumparams = giveup "Wrong number of parameters"
data Result = Present | NotPresent | CheckFailure String
@ -71,8 +71,8 @@ batchResult Present = liftIO $ putStrLn "1"
batchResult _ = liftIO $ putStrLn "0"
toKey :: String -> Key
toKey = fromMaybe (error "Bad key") . file2key
toKey = fromMaybe (giveup "Bad key") . file2key
toRemote :: String -> Annex Remote
toRemote rn = maybe (error "Unknown remote") return
toRemote rn = maybe (giveup "Unknown remote") return
=<< Remote.byNameWithUUID (Just rn)