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-rw-r--r--Annex.hs18
1 files changed, 17 insertions, 1 deletions
diff --git a/Annex.hs b/Annex.hs
index bd3cade58..402c767da 100644
--- a/Annex.hs
+++ b/Annex.hs
@@ -1,4 +1,4 @@
-{- git-annex
+{- git-annex toplevel code
-}
module Annex where
@@ -12,15 +12,21 @@ import Types
import Backend
import BackendList
+{- On startup, examine the git repo, prepare it, and record state for
+ - later. -}
startAnnex :: IO State
startAnnex = do
r <- currentRepo
+ gitPrep r
+ -- TODO query git repo for configuration
return State { repo = r, backends = supportedBackends }
{- Annexes a file, storing it in a backend, and then moving it into
- the annex directory and setting up the symlink pointing to its content. -}
annexFile :: State -> FilePath -> IO ()
annexFile state file = do
+ checkExists file
+ checkLegal file
alreadyannexed <- lookupBackend (backends state) (repo state) file
case (alreadyannexed) of
Just _ -> error $ "already annexed " ++ file
@@ -36,6 +42,16 @@ annexFile state file = do
renameFile file dest
createSymbolicLink dest file
gitAdd (repo state) file
+ checkExists file = do
+ exists <- doesFileExist file
+ case (exists) of
+ False -> error $ "does not exist: " ++ file
+ True -> return ()
+ checkLegal file = do
+ s <- getFileStatus file
+ case (not (isSymbolicLink s) && not (isRegularFile s)) of
+ False -> error $ "not a regular file: " ++ file
+ True -> return ()
{- Sets up a git repo for git-annex. May be called repeatedly. -}
gitPrep :: GitRepo -> IO ()