97 lines
2.2 KiB
Haskell
97 lines
2.2 KiB
Haskell
{- git-annex monad
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-
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- Copyright 2010 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Annex (
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Annex,
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AnnexState(..),
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new,
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run,
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eval,
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getState,
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changeState,
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gitRepo
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) where
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import Control.Monad.State
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import qualified GitRepo as Git
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import GitQueue
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import Types.Backend
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import Types.Remote
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import Types.Crypto
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import TrustLevel
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import Types.UUID
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-- git-annex's monad
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type Annex = StateT AnnexState IO
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-- internal state storage
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data AnnexState = AnnexState
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{ repo :: Git.Repo
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, backends :: [Backend Annex]
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, supportedBackends :: [Backend Annex]
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, remotes :: [Remote Annex]
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, repoqueue :: Queue
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, quiet :: Bool
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, force :: Bool
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, fast :: Bool
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, forcebackend :: Maybe String
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, forcenumcopies :: Maybe Int
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, defaultkey :: Maybe String
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, toremote :: Maybe String
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, fromremote :: Maybe String
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, exclude :: [String]
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, forcetrust :: [(UUID, TrustLevel)]
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, cipher :: Maybe Cipher
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}
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newState :: [Backend Annex] -> Git.Repo -> AnnexState
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newState allbackends gitrepo = AnnexState
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{ repo = gitrepo
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, backends = []
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, remotes = []
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, supportedBackends = allbackends
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, repoqueue = empty
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, quiet = False
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, force = False
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, fast = False
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, forcebackend = Nothing
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, forcenumcopies = Nothing
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, defaultkey = Nothing
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, toremote = Nothing
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, fromremote = Nothing
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, exclude = []
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, forcetrust = []
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, cipher = Nothing
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}
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{- Create and returns an Annex state object for the specified git repo. -}
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new :: Git.Repo -> [Backend Annex] -> IO AnnexState
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new gitrepo allbackends =
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newState allbackends `liftM` (liftIO . Git.configRead) gitrepo
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{- performs an action in the Annex monad -}
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run :: AnnexState -> Annex a -> IO (a, AnnexState)
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run = flip runStateT
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eval :: AnnexState -> Annex a -> IO a
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eval = flip evalStateT
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{- Gets a value from the internal state, selected by the passed value
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- constructor. -}
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getState :: (AnnexState -> a) -> Annex a
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getState = gets
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{- Applies a state mutation function to change the internal state.
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-
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- Example: changeState $ \s -> s { quiet = True }
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-}
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changeState :: (AnnexState -> AnnexState) -> Annex ()
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changeState = modify
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{- Returns the git repository being acted on -}
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gitRepo :: Annex Git.Repo
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gitRepo = getState repo
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