b0575c621f
I hope this doesn't impact speed much -- it does have to pull out a value from Annex state every time it accesses the branch now. The test case I dropped has never caught any problems that I can remember, and would have been rather difficult to convert.
76 lines
2.2 KiB
Haskell
76 lines
2.2 KiB
Haskell
{-# LANGUAGE BangPatterns #-}
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{- git-annex location log
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-
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- git-annex keeps track of which repositories have the contents of annexed
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- files.
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-
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- Repositories record their UUID and the date when they --get or --drop
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- a value.
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-
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- Copyright 2010-2014 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 Logs.Location (
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LogStatus(..),
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logStatus,
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logChange,
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loggedLocations,
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loggedLocationsHistorical,
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loggedKeys,
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loggedKeysFor,
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) where
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import Common.Annex
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import qualified Annex.Branch
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import Logs
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import Logs.Presence
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import Annex.UUID
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import Git.Types (RefDate)
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import qualified Annex
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{- Log a change in the presence of a key's value in current repository. -}
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logStatus :: Key -> LogStatus -> Annex ()
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logStatus key s = do
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u <- getUUID
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logChange key u s
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{- Log a change in the presence of a key's value in a repository. -}
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logChange :: Key -> UUID -> LogStatus -> Annex ()
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logChange key (UUID u) s = do
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config <- Annex.getGitConfig
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addLog (locationLogFile config key) =<< logNow s u
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logChange _ NoUUID _ = noop
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{- Returns a list of repository UUIDs that, according to the log, have
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- the value of a key. -}
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loggedLocations :: Key -> Annex [UUID]
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loggedLocations = getLoggedLocations currentLog
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{- Gets the location log on a particular date. -}
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loggedLocationsHistorical :: RefDate -> Key -> Annex [UUID]
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loggedLocationsHistorical = getLoggedLocations . historicalLog
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getLoggedLocations :: (FilePath -> Annex [String]) -> Key -> Annex [UUID]
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getLoggedLocations getter key = do
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config <- Annex.getGitConfig
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map toUUID <$> (getter . locationLogFile config) key
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{- Finds all keys that have location log information.
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- (There may be duplicate keys in the list.) -}
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loggedKeys :: Annex [Key]
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loggedKeys = mapMaybe locationLogFileKey <$> Annex.Branch.files
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{- Finds all keys that have location log information indicating
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- they are present for the specified repository. -}
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loggedKeysFor :: UUID -> Annex [Key]
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loggedKeysFor u = filterM isthere =<< loggedKeys
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where
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{- This should run strictly to avoid the filterM
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- building many thunks containing keyLocations data. -}
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isthere k = do
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us <- loggedLocations k
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let !there = u `elem` us
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return there
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