58 lines
1.7 KiB
Haskell
58 lines
1.7 KiB
Haskell
{- git-annex repository differences
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-
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- Copyright 2015 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.Difference (
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module Types.Difference,
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setDifferences,
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) where
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import Common.Annex
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import Types.Difference
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import Logs.Difference
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import Config
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import Annex.UUID
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import Logs.UUID
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import Annex.Version
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import qualified Annex
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import qualified Data.Map as M
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-- Differences are only allowed to be tweaked when initializing a
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-- repository for the first time, and then only if there is not another
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-- known uuid. If the repository was cloned from elsewhere, it inherits
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-- the existing settings.
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--
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-- Must be called before setVersion, so it can check if this is the first
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-- time the repository is being initialized.
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setDifferences :: Annex ()
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setDifferences = do
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u <- getUUID
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otherds <- allDifferences <$> recordedDifferences
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ds <- mappend otherds . annexDifferences <$> Annex.getGitConfig
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when (ds /= mempty) $ do
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ds' <- ifM (isJust <$> getVersion)
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( do
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oldds <- recordedDifferencesFor u
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when (ds /= oldds) $
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warning $ "Cannot change tunable parameters in already initialized repository."
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return oldds
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, if otherds == mempty
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then ifM (not . null . filter (/= u) . M.keys <$> uuidMap)
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( do
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warning "Cannot change tunable parameters in a clone of an existing repository."
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return mempty
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, return ds
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)
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else if otherds /= ds
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then do
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warning "The specified tunable parameters differ from values being used in other clones of this repository."
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return otherds
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else return ds
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)
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forM_ (listDifferences ds') $ \d ->
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setConfig (ConfigKey $ differenceConfigKey d) (differenceConfigVal d)
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recordDifferences ds' u
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