62 lines
1.6 KiB
Haskell
62 lines
1.6 KiB
Haskell
{- git-annex core functions -}
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module Core where
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import System.IO
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import System.Directory
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import Control.Monad.State (liftIO)
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import Types
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import BackendList
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import Locations
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import UUID
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import qualified GitRepo as Git
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import qualified Annex
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{- Create and returns an Annex state object.
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- Examines and prepares the git repo.
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-}
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start :: IO AnnexState
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start = do
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g <- Git.repoFromCwd
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let s = Annex.new g
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(_,s') <- Annex.run s (prep g)
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return s'
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where
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prep g = do
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-- setup git and read its config; update state
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g' <- liftIO $ Git.configRead g
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Annex.gitRepoChange g'
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liftIO $ gitSetup g'
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Annex.backendsChange $ parseBackendList $
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Git.configGet g' "annex.backends" ""
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prepUUID
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{- Sets up a git repo for git-annex. May be called repeatedly. -}
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gitSetup :: Git.Repo -> IO ()
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gitSetup repo = do
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-- configure git to use union merge driver on state files
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exists <- doesFileExist attributes
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if (not exists)
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then do
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writeFile attributes $ attrLine ++ "\n"
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commit
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else do
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content <- readFile attributes
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if (all (/= attrLine) (lines content))
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then do
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appendFile attributes $ attrLine ++ "\n"
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commit
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else return ()
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where
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attrLine = stateLoc ++ "/*.log merge=union"
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attributes = Git.attributes repo
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commit = do
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Git.run repo ["add", attributes]
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Git.run repo ["commit", "-m", "git-annex setup",
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attributes]
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{- Checks if a given key is currently present in the annexLocation -}
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inAnnex :: Backend -> Key -> Annex Bool
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inAnnex backend key = do
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g <- Annex.gitRepo
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liftIO $ doesFileExist $ annexLocation g backend key
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