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{- git-annex command-line options
-
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}

module Option (
common,
matcher,
flag,
field,
name,
ArgDescr(..),
OptDescr(..),
) where

import System.Console.GetOpt
import System.Log.Logger

import Common.Annex
import qualified Annex
import Limit
import Usage

common :: [Option]
common =
[ Option [] ["force"] (NoArg (setforce True))
"allow actions that may lose annexed data"
, Option ['F'] ["fast"] (NoArg (setfast True))
"avoid slow operations"
, Option ['a'] ["auto"] (NoArg (setauto True))
"automatic mode"
, Option ['q'] ["quiet"] (NoArg (setoutput Annex.QuietOutput))
"avoid verbose output"
, Option ['v'] ["verbose"] (NoArg (setoutput Annex.NormalOutput))
"allow verbose output (default)"
, Option ['j'] ["json"] (NoArg (setoutput Annex.JSONOutput))
"enable JSON output"
, Option ['d'] ["debug"] (NoArg setdebug)
"show debug messages"
, Option ['b'] ["backend"] (ReqArg setforcebackend paramName)
"specify key-value backend to use"
]
where
setforce v = Annex.changeState $ \s -> s { Annex.force = v }
setfast v = Annex.changeState $ \s -> s { Annex.fast = v }
setauto v = Annex.changeState $ \s -> s { Annex.auto = v }
setoutput v = Annex.changeState $ \s -> s { Annex.output = v }
setforcebackend v = Annex.changeState $ \s -> s { Annex.forcebackend = Just v }
setdebug = liftIO $ updateGlobalLogger rootLoggerName $
setLevel DEBUG

matcher :: [Option]
matcher =
[ longopt "not" "negate next option"
, longopt "and" "both previous and next option must match"
, longopt "or" "either previous or next option must match"
, shortopt "(" "open group of options"
, shortopt ")" "close group of options"
]
where
longopt o = Option [] [o] $ NoArg $ addToken o
shortopt o = Option o [] $ NoArg $ addToken o

{- An option that sets a flag. -}
flag :: String -> String -> String -> Option
flag short opt description =
Option short [opt] (NoArg (Annex.setFlag opt)) description

{- An option that sets a field. -}
field :: String -> String -> String -> String -> Option
field short opt paramdesc description =
Option short [opt] (ReqArg (Annex.setField opt) paramdesc) description

{- The flag or field name used for an option. -}
name :: Option -> String
name (Option _ o _ _) = Prelude.head o
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