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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
{- git-annex uuids
-
- Each git repository used by git-annex has an annex.uuid setting that
- uniquely identifies that repository.
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module UUID (
UUID,
getUUID,
prepUUID,
genUUID,
reposByUUID,
prettyPrintUUIDs,
describeUUID,
uuidLog
) where
import Control.Monad.State
import Maybe
import List
import System.Cmd.Utils
import System.IO
import System.Directory
import qualified Data.Map as M
import System.Posix.Process
import qualified GitRepo as Git
import Types
import Locations
import qualified Annex
import Utility
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 :: IO 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 :: Git.Repo -> Annex UUID
getUUID r = do
g <- Annex.gitRepo
let c = cached r g
let u = uncached r
if (c /= u && u /= "")
then do
updatecache g r u
return u
else return c
where
uncached r = Git.configGet r "annex.uuid" ""
cached r g = Git.configGet g (cachekey r) ""
updatecache g r u = when (g /= r) $ setConfig (cachekey r) u
cachekey r = "remote." ++ (Git.repoRemoteName r) ++ ".annex-uuid"
{- Make sure that the repo has an annex.uuid setting. -}
prepUUID :: Annex ()
prepUUID = do
g <- Annex.gitRepo
u <- getUUID g
when ("" == u) $ do
uuid <- liftIO $ genUUID
setConfig configkey uuid
{- Changes a git config setting in both internal state and .git/config -}
setConfig :: String -> String -> Annex ()
setConfig key value = do
g <- Annex.gitRepo
liftIO $ Git.run g ["config", key, value]
-- re-read git config and update the repo's state
g' <- liftIO $ Git.configRead g
Annex.gitRepoChange g'
{- Filters a list of repos to ones that have listed UUIDs. -}
reposByUUID :: [Git.Repo] -> [UUID] -> Annex [Git.Repo]
reposByUUID repos uuids = do
filterM match repos
where
match r = do
u <- getUUID r
return $ isJust $ elemIndex u uuids
{- Pretty-prints a list of UUIDs -}
prettyPrintUUIDs :: [UUID] -> Annex String
prettyPrintUUIDs uuids = do
m <- uuidMap
return $ unwords $ map (\u -> "\t"++(prettify m u)++"\n") uuids
where
prettify m u =
if (not $ null $ findlog m u)
then u ++ " -- " ++ (findlog m u)
else u
findlog m u = M.findWithDefault "" u m
{- Records a description for a uuid in the uuidLog. -}
describeUUID :: UUID -> String -> Annex ()
describeUUID uuid desc = do
m <- uuidMap
let m' = M.insert uuid desc m
log <- uuidLog
pid <- liftIO $ getProcessID
let tmplog = log ++ ".tmp" ++ show pid
liftIO $ createDirectoryIfMissing True (parentDir log)
liftIO $ writeFile tmplog $ serialize m'
liftIO $ renameFile tmplog log
where
serialize m = unlines $ map (\(u, d) -> u++" "++d) $ M.toList m
{- Read and parse the uuidLog into a Map -}
uuidMap :: Annex (M.Map UUID String)
uuidMap = do
log <- uuidLog
s <- liftIO $ catch (readFile log) (\error -> return "")
return $ M.fromList $ map (\l -> pair l) $ lines s
where
pair l =
if (1 < (length $ words l))
then ((words l) !! 0, unwords $ drop 1 $ words l)
else ("", "")
{- Filename of uuid.log. -}
uuidLog :: Annex String
uuidLog = do
g <- Annex.gitRepo
return $ (gitStateDir g) ++ "uuid.log"
|
