convert Unused, and remove some dead code for old style option parsing

CmdLine/GitAnnex.hs

@@ -50,7 +50,7 @@ import qualified Command.InitRemote
 import qualified Command.EnableRemote
 --import qualified Command.Expire
 import qualified Command.Repair
---import qualified Command.Unused
+import qualified Command.Unused
 --import qualified Command.DropUnused
 import qualified Command.AddUnused
 import qualified Command.Unlock
@@ -180,7 +180,7 @@ cmds =
 	, Command.Fix.cmd
 --	, Command.Expire.cmd
 	, Command.Repair.cmd
---	, Command.Unused.cmd
+	, Command.Unused.cmd
 --	, Command.DropUnused.cmd
 	, Command.AddUnused.cmd
 	, Command.Find.cmd

CmdLine/Option.hs

@@ -5,18 +5,9 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
-module CmdLine.Option (
-	commonGlobalOptions,
-	flagOption,
-	fieldOption,
-	optionName,
-	optionParam,
-	ArgDescr(..),
-	OptDescr(..),
-) where
+module CmdLine.Option where
 
 import Options.Applicative
-import System.Console.GetOpt
 
 import Common.Annex
 import CmdLine.Usage
@@ -70,20 +61,3 @@ commonGlobalOptions =
 	setforcebackend v = Annex.changeState $ \s -> s { Annex.forcebackend = Just v }
 	setdebug = Annex.changeGitConfig $ \c -> c { annexDebug = True }
 	unsetdebug = Annex.changeGitConfig $ \c -> c { annexDebug = False }
-
-{- An option that sets a flag. -}
-flagOption :: String -> String -> String -> Option
-flagOption shortv opt description = 
-	Option shortv [opt] (NoArg (Annex.setFlag opt)) description
-
-{- An option that sets a field. -}
-fieldOption :: String -> String -> String -> String -> Option
-fieldOption shortv opt paramdesc description = 
-	Option shortv [opt] (ReqArg (Annex.setField opt) paramdesc) description
-
-{- The flag or field name used for an option. -}
-optionName :: Option -> String
-optionName (Option _ o _ _) = Prelude.head o
-
-optionParam :: Option -> String
-optionParam o = "--" ++ optionName o

CmdLine/Seek.hs

@@ -22,7 +22,6 @@ import qualified Git.LsFiles as LsFiles
 import qualified Git.LsTree as LsTree
 import Git.FilePath
 import qualified Limit
-import CmdLine.Option
 import CmdLine.GitAnnex.Options
 import CmdLine.Action
 import Logs.Location
@@ -152,15 +151,6 @@ withKeys a params = seekActions $ return $ map (a . parse) params
   where
 	parse p = fromMaybe (error "bad key") $ file2key p
 
-{- Gets the value of a field options, which is fed into
- - a conversion function.
- -}
-getOptionField :: Option -> (Maybe String -> Annex a) -> Annex a
-getOptionField option converter = converter <=< Annex.getField $ optionName option
-
-getOptionFlag :: Option -> Annex Bool
-getOptionFlag option = Annex.getFlag (optionName option)
-
 withNothing :: CommandStart -> CmdParams -> CommandSeek
 withNothing a [] = seekActions $ return [a]
 withNothing _ _ = error "This command takes no parameters."

Command/Unused.hs

@@ -1,6 +1,6 @@
 {- git-annex command
  -
- - Copyright 2010-2012 Joey Hess <id@joeyh.name>
+ - Copyright 2010-2015 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -31,6 +31,7 @@ import Annex.CatFile
 import Types.Key
 import Types.RefSpec
 import Git.FilePath
+import Git.Types
 import Logs.View (is_branchView)
 import Annex.BloomFilter
 
@@ -38,26 +39,33 @@ cmd :: Command
 cmd = -- withGlobalOptions [unusedFromOption, refSpecOption] $
 	command "unused" SectionMaintenance 
 		"look for unused file content"
-		paramNothing (withParams seek)
+		paramNothing (seek <$$> optParser)
 
-unusedFromOption :: Option
-unusedFromOption = fieldOption ['f'] "from" paramRemote "remote to check for unused content"
+data UnusedOptions = UnusedOptions
+	{ fromRemote :: Maybe RemoteName
+	, refSpecOption :: Maybe RefSpec
+	}
 
-refSpecOption :: Option
-refSpecOption = fieldOption [] "used-refspec" paramRefSpec "refs to consider used (default: all refs)"
+optParser :: CmdParamsDesc -> Parser UnusedOptions
+optParser _ = UnusedOptions
+	<$> optional (strOption
+		( long "from" <> short 'f' <> metavar paramRemote
+		<> help "remote to check for unused content"
+		))
+	<*> optional (option (eitherReader parseRefSpec)
+		( long "unused-refspec" <> metavar paramRefSpec
+		<> help "refs to consider used (default: all branches)"
+		))
 
-seek :: CmdParams -> CommandSeek
-seek = withNothing start
+seek :: UnusedOptions -> CommandSeek
+seek = commandAction . start
 
-{- Finds unused content in the annex. -} 
-start :: CommandStart
-start = do
+start :: UnusedOptions -> CommandStart
+start o = do
 	cfgrefspec <- fromMaybe allRefSpec . annexUsedRefSpec
 		<$> Annex.getGitConfig
-	!refspec <- maybe cfgrefspec (either error id . parseRefSpec)
-		<$> Annex.getField (optionName refSpecOption)
-	from <- Annex.getField (optionName unusedFromOption)
-	let (name, perform) = case from of
+	let refspec = fromMaybe cfgrefspec (refSpecOption o)
+	let (name, perform) = case fromRemote o of
 		Nothing -> (".", checkUnused refspec)
 		Just "." -> (".", checkUnused refspec)
 		Just "here" -> (".", checkUnused refspec)