move stuff out of Core

Command/Init.hs

@@ -9,14 +9,15 @@ module Command.Init where
 
 import Control.Monad.State (liftIO)
 import Control.Monad (when)
+import System.Directory
 
 import Command
 import qualified Annex
-import Core
 import qualified GitRepo as Git
 import UUID
 import Version
 import Messages
+import Locations
 
 seek :: [SubCmdSeek]
 seek = [withString start]
@@ -46,3 +47,40 @@ cleanup = do
 	liftIO $ Git.run g ["add", logfile]
 	liftIO $ Git.run g ["commit", "-m", "git annex init", logfile]
 	return True
+
+{- configure git to use union merge driver on state files, if it is not
+ - already -}
+gitAttributes :: Git.Repo -> IO ()
+gitAttributes repo = do
+	exists <- doesFileExist attributes
+	if (not exists)
+		then do
+			writeFile attributes $ attrLine ++ "\n"
+			commit
+		else do
+			content <- readFile attributes
+			when (all (/= attrLine) (lines content)) $ do
+				appendFile attributes $ attrLine ++ "\n"
+				commit
+	where
+		attrLine = stateLoc ++ "*.log merge=union"
+		attributes = Git.attributes repo
+		commit = do
+			Git.run repo ["add", attributes]
+			Git.run repo ["commit", "-m", "git-annex setup", 
+					attributes]
+
+{- set up a git pre-commit hook, if one is not already present -}
+gitPreCommitHook :: Git.Repo -> IO ()
+gitPreCommitHook repo = do
+	let hook = Git.workTree repo ++ "/" ++ Git.gitDir repo ++
+		"/hooks/pre-commit"
+	exists <- doesFileExist hook
+	if (exists)
+		then putStrLn $ "pre-commit hook (" ++ hook ++ ") already exists, not configuring"
+		else do
+			writeFile hook $ "#!/bin/sh\n" ++
+				"# automatically configured by git-annex\n" ++ 
+				"git annex pre-commit .\n"
+			p <- getPermissions hook
+			setPermissions hook $ p {executable = True}