git-annex/Command/SetPresentKey.hs
Joey Hess 0a4479b8ec
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.
2016-11-15 21:29:54 -04:00

36 lines
878 B
Haskell

{- git-annex command
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.SetPresentKey where
import Command
import Logs.Location
import Logs.Presence.Pure
cmd :: Command
cmd = noCommit $
command "setpresentkey" SectionPlumbing
"change records of where key is present"
(paramPair paramKey (paramPair paramUUID "[1|0]"))
(withParams seek)
seek :: CmdParams -> CommandSeek
seek = withWords start
start :: [String] -> CommandStart
start (ks:us:vs:[]) = do
showStart' "setpresentkey" k (mkActionItem k)
next $ perform k (toUUID us) s
where
k = fromMaybe (giveup "bad key") (file2key ks)
s = fromMaybe (giveup "bad value") (parseStatus vs)
start _ = giveup "Wrong number of parameters"
perform :: Key -> UUID -> LogStatus -> CommandPerform
perform k u s = next $ do
logChange k u s
return True