blob: 28b423e2fa6a19e84f121719009903813557a18d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
{- git-annex location log
-
- git-annex keeps track of which repositories have the contents of annexed
- files.
-
- Repositories record their UUID and the date when they --get or --drop
- a value.
-
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module LocationLog (
LogStatus(..),
logChange,
readLog,
writeLog,
keyLocations,
loggedKeys,
logFile,
logFileKey
) where
import System.FilePath
import Control.Monad (when)
import Data.Maybe
import qualified Git
import qualified Branch
import UUID
import Types
import Types.Key
import Locations
import PresenceLog
{- Log a change in the presence of a key's value in a repository. -}
logChange :: Git.Repo -> Key -> UUID -> LogStatus -> Annex ()
logChange repo key u s = do
when (null u) $
error $ "unknown UUID for " ++ Git.repoDescribe repo ++
" (have you run git annex init there?)"
addLog (logFile key) =<< logNow s u
{- Returns a list of repository UUIDs that, according to the log, have
- the value of a key. -}
keyLocations :: Key -> Annex [UUID]
keyLocations key = currentLog $ logFile key
{- Finds all keys that have location log information.
- (There may be duplicate keys in the list.) -}
loggedKeys :: Annex [Key]
loggedKeys =
return . catMaybes . map (logFileKey . takeFileName) =<< Branch.files
{- The filename of the log file for a given key. -}
logFile :: Key -> String
logFile key = hashDirLower key ++ keyFile key ++ ".log"
{- Converts a log filename into a key. -}
logFileKey :: FilePath -> Maybe Key
logFileKey file
| end == ".log" = readKey beginning
| otherwise = Nothing
where
(beginning, end) = splitAt (length file - 4) file
|
