41 lines
1.2 KiB
Haskell
41 lines
1.2 KiB
Haskell
{- git-annex branch state management
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-
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- Runtime state about the git-annex branch.
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-
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- Copyright 2011-2012 Joey Hess <id@joeyh.name>
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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.BranchState where
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import Common.Annex
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import Types.BranchState
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import qualified Annex
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getState :: Annex BranchState
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getState = Annex.getState Annex.branchstate
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changeState :: (BranchState -> BranchState) -> Annex ()
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changeState changer = Annex.changeState $ \s ->
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s { Annex.branchstate = changer (Annex.branchstate s) }
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{- Runs an action to check that the index file exists, if it's not been
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- checked before in this run of git-annex. -}
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checkIndexOnce :: Annex () -> Annex ()
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checkIndexOnce a = unlessM (indexChecked <$> getState) $ do
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a
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changeState $ \s -> s { indexChecked = True }
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{- Runs an action to update the branch, if it's not been updated before
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- in this run of git-annex. -}
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runUpdateOnce :: Annex () -> Annex ()
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runUpdateOnce a = unlessM (branchUpdated <$> getState) $ do
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a
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disableUpdate
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{- Avoids updating the branch. A useful optimisation when the branch
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- is known to have not changed, or git-annex won't be relying on info
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- from it. -}
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disableUpdate :: Annex ()
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disableUpdate = changeState $ \s -> s { branchUpdated = True }
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