84 lines
2 KiB
Haskell
84 lines
2 KiB
Haskell
{- git-annex monad -}
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module Annex (
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new,
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run,
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gitRepo,
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gitRepoChange,
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backends,
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backendsChange,
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supportedBackends,
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flagIsSet,
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flagChange,
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flagGet,
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Flag(..)
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) where
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import Control.Monad.State
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import qualified Data.Map as M
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import qualified GitRepo as Git
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import Types
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import qualified TypeInternals as Internals
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{- Create and returns an Annex state object for the specified git repo.
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-}
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new :: Git.Repo -> [Backend] -> IO AnnexState
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new gitrepo allbackends = do
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let s = Internals.AnnexState {
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Internals.repo = gitrepo,
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Internals.backends = [],
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Internals.supportedBackends = allbackends,
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Internals.flags = M.empty
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}
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(_,s') <- Annex.run s (prep gitrepo)
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return s'
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where
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prep gitrepo = do
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-- read git config and update state
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gitrepo' <- liftIO $ Git.configRead gitrepo
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Annex.gitRepoChange gitrepo'
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-- performs an action in the Annex monad
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run state action = runStateT (action) state
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-- Annex monad state accessors
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gitRepo :: Annex Git.Repo
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gitRepo = do
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state <- get
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return (Internals.repo state)
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gitRepoChange :: Git.Repo -> Annex ()
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gitRepoChange r = do
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state <- get
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put state { Internals.repo = r }
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return ()
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backends :: Annex [Backend]
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backends = do
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state <- get
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return (Internals.backends state)
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backendsChange :: [Backend] -> Annex ()
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backendsChange b = do
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state <- get
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put state { Internals.backends = b }
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return ()
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supportedBackends :: Annex [Backend]
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supportedBackends = do
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state <- get
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return (Internals.supportedBackends state)
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flagIsSet :: FlagName -> Annex Bool
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flagIsSet name = do
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state <- get
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case (M.lookup name $ Internals.flags state) of
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Just (FlagBool True) -> return True
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_ -> return False
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flagChange :: FlagName -> Flag -> Annex ()
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flagChange name val = do
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state <- get
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put state { Internals.flags = M.insert name val $ Internals.flags state }
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return ()
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flagGet :: FlagName -> Annex String
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flagGet name = do
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state <- get
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case (M.lookup name $ Internals.flags state) of
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Just (FlagString s) -> return s
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_ -> return ""
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