reorder repo parameters last

Many functions took the repo as their first parameter. Changing it
consistently to be the last parameter allows doing some useful things with
currying, that reduce boilerplate.

In particular, g <- gitRepo is almost never needed now, instead
use inRepo to run an IO action in the repo, and fromRepo to get
a value from the repo.

This also provides more opportunities to use monadic and applicative
combinators.

Seek.hs

@@ -20,16 +20,18 @@ import qualified Git
 import qualified Git.LsFiles as LsFiles
 import qualified Limit
 
+seekHelper :: ([FilePath] -> Git.Repo -> IO [FilePath]) -> [FilePath] -> Annex [FilePath]
+seekHelper a params = do
+	g <- gitRepo
+	liftIO $ runPreserveOrder (\p -> a p g) params
+
 withFilesInGit :: (FilePath -> CommandStart) -> CommandSeek
-withFilesInGit a params = do
-	repo <- gitRepo
-	prepFiltered a $ liftIO $ runPreserveOrder (LsFiles.inRepo repo) params
+withFilesInGit a params = prepFiltered a $ seekHelper LsFiles.inRepo params
 
 withAttrFilesInGit :: String -> ((FilePath, String) -> CommandStart) -> CommandSeek
 withAttrFilesInGit attr a params = do
-	repo <- gitRepo
-	files <- liftIO $ runPreserveOrder (LsFiles.inRepo repo) params
-	prepFilteredGen a fst $ liftIO $ Git.checkAttr repo attr files
+	files <- seekHelper LsFiles.inRepo params
+	prepFilteredGen a fst $ inRepo $ Git.checkAttr attr files
 
 withNumCopies :: (FilePath -> Maybe Int -> CommandStart) -> CommandSeek
 withNumCopies a params = withAttrFilesInGit "annex.numcopies" go params
@@ -38,8 +40,7 @@ withNumCopies a params = withAttrFilesInGit "annex.numcopies" go params
 
 withBackendFilesInGit :: (BackendFile -> CommandStart) -> CommandSeek
 withBackendFilesInGit a params = do
-	repo <- gitRepo
-	files <- liftIO $ runPreserveOrder (LsFiles.inRepo repo) params
+	files <- seekHelper LsFiles.inRepo params
 	prepBackendPairs a files
 
 withFilesMissing :: (String -> CommandStart) -> CommandSeek
@@ -49,9 +50,8 @@ withFilesMissing a params = prepFiltered a $ liftIO $ filterM missing params
 
 withFilesNotInGit :: (BackendFile -> CommandStart) -> CommandSeek
 withFilesNotInGit a params = do
-	repo <- gitRepo
 	force <- Annex.getState Annex.force
-	newfiles <- liftIO $ runPreserveOrder (LsFiles.notInRepo repo force) params
+	newfiles <- seekHelper (LsFiles.notInRepo force) params
 	prepBackendPairs a newfiles
 
 withWords :: ([String] -> CommandStart) -> CommandSeek
@@ -61,10 +61,8 @@ withStrings :: (String -> CommandStart) -> CommandSeek
 withStrings a params = return $ map a params
 
 withFilesToBeCommitted :: (String -> CommandStart) -> CommandSeek
-withFilesToBeCommitted a params = do
-	repo <- gitRepo
-	prepFiltered a $
-		liftIO $ runPreserveOrder (LsFiles.stagedNotDeleted repo) params
+withFilesToBeCommitted a params = prepFiltered a $
+	seekHelper LsFiles.stagedNotDeleted params
 
 withFilesUnlocked :: (BackendFile -> CommandStart) -> CommandSeek
 withFilesUnlocked = withFilesUnlocked' LsFiles.typeChanged
@@ -72,13 +70,13 @@ withFilesUnlocked = withFilesUnlocked' LsFiles.typeChanged
 withFilesUnlockedToBeCommitted :: (BackendFile -> CommandStart) -> CommandSeek
 withFilesUnlockedToBeCommitted = withFilesUnlocked' LsFiles.typeChangedStaged
 
-withFilesUnlocked' :: (Git.Repo -> [FilePath] -> IO [FilePath]) -> (BackendFile -> CommandStart) -> CommandSeek
+withFilesUnlocked' :: ([FilePath] -> Git.Repo -> IO [FilePath]) -> (BackendFile -> CommandStart) -> CommandSeek
 withFilesUnlocked' typechanged a params = do
 	-- unlocked files have changed type from a symlink to a regular file
-	repo <- gitRepo
-	typechangedfiles <- liftIO $ runPreserveOrder (typechanged repo) params
+	top <- fromRepo $ Git.workTree
+	typechangedfiles <- seekHelper typechanged params
 	unlockedfiles <- liftIO $ filterM notSymlink $
-		map (\f -> Git.workTree repo ++ "/" ++ f) typechangedfiles
+		map (\f -> top ++ "/" ++ f) typechangedfiles
 	prepBackendPairs a unlockedfiles
 
 withKeys :: (Key -> CommandStart) -> CommandSeek