use ShellParam type

So, I have a type checked safe handling of filenames starting with dashes,
throughout the code.

GitQueue.hs

@@ -17,6 +17,7 @@ import System.IO
 import System.Cmd.Utils
 import Data.String.Utils
 import Control.Monad (unless, forM_)
+import Utility
 
 import qualified GitRepo as Git
 
@@ -24,7 +25,7 @@ import qualified GitRepo as Git
  - is not included, and must be able to be appended after the params. -}
 data Action = Action {
 		getSubcommand :: String,
-		getParams :: [String]
+		getParams :: [ShellParam]
 	} deriving (Show, Eq, Ord)
 
 {- A queue of actions to perform (in any order) on a git repository,
@@ -37,7 +38,7 @@ empty :: Queue
 empty = M.empty
 
 {- Adds an action to a queue. -}
-add :: Queue -> String -> [String] -> FilePath -> Queue
+add :: Queue -> String -> [ShellParam] -> FilePath -> Queue
 add queue subcommand params file = M.insertWith (++) action [file] queue
 	where
 		action = Action subcommand params
@@ -55,7 +56,7 @@ runAction :: Git.Repo -> Action -> [FilePath] -> IO ()
 runAction repo action files = do
 	unless (null files) runxargs
 	where
-		runxargs = pOpen WriteToPipe "xargs" ("-0":gitcmd) feedxargs
-		gitcmd = "git" : Git.gitCommandLine repo
-			(getSubcommand action:getParams action)
+		runxargs = pOpen WriteToPipe "xargs" ("-0":"git":params) feedxargs
+		params = toShell $ Git.gitCommandLine repo
+			(Param (getSubcommand action):getParams action)
 		feedxargs h = hPutStr h $ join "\0" files