71 lines
1.5 KiB
Haskell
71 lines
1.5 KiB
Haskell
{- git-annex monad -}
|
|
|
|
module Annex (
|
|
new,
|
|
run,
|
|
gitRepo,
|
|
gitRepoChange,
|
|
backends,
|
|
backendsChange,
|
|
flagIsSet,
|
|
flagChange,
|
|
Flag(..)
|
|
) where
|
|
|
|
import Control.Monad.State
|
|
|
|
import qualified GitRepo as Git
|
|
import Types
|
|
import qualified BackendTypes as Backend
|
|
|
|
{- Create and returns an Annex state object for the specified git repo.
|
|
-}
|
|
new :: Git.Repo -> IO AnnexState
|
|
new g = do
|
|
let s = Backend.AnnexState {
|
|
Backend.repo = g,
|
|
Backend.backends = [],
|
|
Backend.flags = []
|
|
}
|
|
(_,s') <- Annex.run s (prep g)
|
|
return s'
|
|
where
|
|
prep g = do
|
|
-- read git config and update state
|
|
g' <- liftIO $ Git.configRead g
|
|
Annex.gitRepoChange g'
|
|
|
|
-- performs an action in the Annex monad
|
|
run state action = runStateT (action) state
|
|
|
|
-- Annex monad state accessors
|
|
gitRepo :: Annex Git.Repo
|
|
gitRepo = do
|
|
state <- get
|
|
return (Backend.repo state)
|
|
gitRepoChange :: Git.Repo -> Annex ()
|
|
gitRepoChange r = do
|
|
state <- get
|
|
put state { Backend.repo = r }
|
|
return ()
|
|
backends :: Annex [Backend]
|
|
backends = do
|
|
state <- get
|
|
return (Backend.backends state)
|
|
backendsChange :: [Backend] -> Annex ()
|
|
backendsChange b = do
|
|
state <- get
|
|
put state { Backend.backends = b }
|
|
return ()
|
|
flagIsSet :: Flag -> Annex Bool
|
|
flagIsSet flag = do
|
|
state <- get
|
|
return $ elem flag $ Backend.flags state
|
|
flagChange :: Flag -> Bool -> Annex ()
|
|
flagChange flag set = do
|
|
state <- get
|
|
let f = filter (/= flag) $ Backend.flags state
|
|
if (set)
|
|
then put state { Backend.flags = (flag:f) }
|
|
else put state { Backend.flags = f }
|
|
return ()
|