convert all commands to work with optparse-applicative

Still no options though.

CmdLine/Usage.hs

@@ -1,6 +1,6 @@
 {- git-annex usage messages
  -
- - Copyright 2010-2011 Joey Hess <id@joeyh.name>
+ - Copyright 2010-2015 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -8,10 +8,10 @@
 module CmdLine.Usage where
 
 import Common.Annex
-
 import Types.Command
 
 import System.Console.GetOpt
+import qualified Options.Applicative as O
 
 usageMessage :: String -> String
 usageMessage s = "Usage: " ++ s
@@ -56,6 +56,13 @@ commandUsage cmd = unlines
 		, "[option ...]"
 		]
 
+{- Simple CommandParser generator, for when the CommandSeek wants all
+ - non-option parameters. -}
+withParams :: (CmdParams -> CommandSeek) -> String -> CommandParser
+withParams mkseek paramdesc = mkseek <$> O.many cmdparams
+  where
+	cmdparams = O.argument O.str (O.metavar paramdesc)
+
 {- Descriptions of params used in usage messages. -}
 paramPaths :: String
 paramPaths = paramRepeating paramPath -- most often used