blob: 5c9f9179ea968c4924e06967d89345f18e6fb21f (
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
67
68
69
70
71
72
73
|
{- git-annex uuids
-
- Each git repository used by git-annex has an annex.uuid setting that
- uniquely identifies that repository.
-
-}
module UUID (
UUID,
getUUID,
prepUUID,
genUUID,
reposByUUID
) where
import Control.Monad.State
import Maybe
import List
import System.Cmd.Utils
import System.IO
import GitRepo
import Types
type UUID = String
configkey="annex.uuid"
{- Generates a UUID. There is a library for this, but it's not packaged,
- so use the command line tool. -}
genUUID :: Annex UUID
genUUID = liftIO $ pOpen ReadFromPipe "uuid" ["-m"] $ \h -> hGetLine h
{- Looks up a repo's UUID. May return "" if none is known.
-
- UUIDs of remotes are cached in git config, using keys named
- remote.<name>.annex-uuid
-
- -}
getUUID :: GitRepo -> Annex UUID
getUUID r = do
if ("" /= configured r)
then return $ configured r
else cached r
where
configured r = gitConfig r "annex.uuid" ""
cached r = do
g <- gitAnnex
return $ gitConfig g (configkey r) ""
configkey r = "remote." ++ (gitRepoRemoteName r) ++ ".annex-uuid"
{- Make sure that the repo has an annex.uuid setting. -}
prepUUID :: Annex ()
prepUUID = do
g <- gitAnnex
u <- getUUID g
if ("" == u)
then do
uuid <- genUUID
liftIO $ gitRun g ["config", configkey, uuid]
-- re-read git config and update the repo's state
u' <- liftIO $ gitConfigRead g
gitAnnexChange u'
return ()
else return ()
{- Filters a list of repos to ones that have listed UUIDs. -}
reposByUUID :: [GitRepo] -> [UUID] -> Annex [GitRepo]
reposByUUID repos uuids = do
filterM match repos
where
match r = do
u <- getUUID r
return $ isJust $ elemIndex u uuids
|
