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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GPG key ID: C910D9222512E3C7
116 changed files with 287 additions and 270 deletions

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@ -26,16 +26,16 @@ seek :: CmdParams -> CommandSeek
seek = withWords start
start :: [String] -> CommandStart
start [] = error "Specify a name for the remote."
start [] = giveup "Specify a name for the remote."
start (name:ws) = ifM (isJust <$> findExisting name)
( error $ "There is already a special remote named \"" ++ name ++
( giveup $ "There is already a special remote named \"" ++ name ++
"\". (Use enableremote to enable an existing special remote.)"
, do
ifM (isJust <$> Remote.byNameOnly name)
( error $ "There is already a remote named \"" ++ name ++ "\""
( giveup $ "There is already a remote named \"" ++ name ++ "\""
, do
let c = newConfig name
t <- either error return (findType config)
t <- either giveup return (findType config)
showStart "initremote" name
next $ perform t name $ M.union config c