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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
{- Using ddar as a remote. Based on bup and rsync remotes.
-
- Copyright 2011 Joey Hess <id@joeyh.name>
- Copyright 2014 Robie Basak <robie@justgohome.co.uk>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote.Ddar (remote) where
import qualified Data.Map as M
import qualified Data.ByteString.Lazy as L
import System.IO.Error
import Annex.Common
import Types.Remote
import Types.Creds
import qualified Git
import Config
import Config.Cost
import Remote.Helper.Special
import Annex.Ssh
import Annex.UUID
data DdarRepo = DdarRepo
{ ddarRepoConfig :: RemoteGitConfig
, ddarRepoLocation :: String
}
remote :: RemoteType
remote = RemoteType {
typename = "ddar",
enumerate = const (findSpecialRemotes "ddarrepo"),
generate = gen,
setup = ddarSetup
}
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
gen r u c gc = do
cst <- remoteCost gc $
if ddarLocal ddarrepo
then nearlyCheapRemoteCost
else expensiveRemoteCost
return $ Just $ specialRemote' specialcfg c
(simplyPrepare $ store ddarrepo)
(simplyPrepare $ retrieve ddarrepo)
(simplyPrepare $ remove ddarrepo)
(simplyPrepare $ checkKey ddarrepo)
(this cst)
where
this cst = Remote
{ uuid = u
, cost = cst
, name = Git.repoDescribe r
, storeKey = storeKeyDummy
, retrieveKeyFile = retreiveKeyFileDummy
, retrieveKeyFileCheap = retrieveCheap
, removeKey = removeKeyDummy
, lockContent = Nothing
, checkPresent = checkPresentDummy
, checkPresentCheap = ddarLocal ddarrepo
, whereisKey = Nothing
, remoteFsck = Nothing
, repairRepo = Nothing
, config = c
, repo = r
, gitconfig = gc
, localpath = if ddarLocal ddarrepo && not (null $ ddarRepoLocation ddarrepo)
then Just $ ddarRepoLocation ddarrepo
else Nothing
, remotetype = remote
, availability = if ddarLocal ddarrepo then LocallyAvailable else GloballyAvailable
, readonly = False
, mkUnavailable = return Nothing
, getInfo = return [("repo", ddarRepoLocation ddarrepo)]
, claimUrl = Nothing
, checkUrl = Nothing
}
ddarrepo = maybe (error "missing ddarrepo") (DdarRepo gc) (remoteAnnexDdarRepo gc)
specialcfg = (specialRemoteCfg c)
-- chunking would not improve ddar
{ chunkConfig = NoChunks
}
ddarSetup :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> RemoteGitConfig -> Annex (RemoteConfig, UUID)
ddarSetup mu _ c gc = do
u <- maybe (liftIO genUUID) return mu
-- verify configuration is sane
let ddarrepo = fromMaybe (error "Specify ddarrepo=") $
M.lookup "ddarrepo" c
(c', _encsetup) <- encryptionSetup c gc
-- The ddarrepo is stored in git config, as well as this repo's
-- persistant state, so it can vary between hosts.
gitConfigSpecialRemote u c' "ddarrepo" ddarrepo
return (c', u)
store :: DdarRepo -> Storer
store ddarrepo = fileStorer $ \k src _p -> do
let params =
[ Param "c"
, Param "-N"
, Param $ key2file k
, Param $ ddarRepoLocation ddarrepo
, File src
]
liftIO $ boolSystem "ddar" params
{- Convert remote DdarRepo to host and path on remote end -}
splitRemoteDdarRepo :: DdarRepo -> (String, String)
splitRemoteDdarRepo ddarrepo =
(host, ddarrepo')
where
(host, remainder) = span (/= ':') (ddarRepoLocation ddarrepo)
ddarrepo' = drop 1 remainder
{- Return the command and parameters to use for a ddar call that may need to be
- made on a remote repository. This will call ssh if needed. -}
ddarRemoteCall :: DdarRepo -> Char -> [CommandParam] -> Annex (String, [CommandParam])
ddarRemoteCall ddarrepo cmd params
| ddarLocal ddarrepo = return ("ddar", localParams)
| otherwise = do
os <- sshOptions (host, Nothing) (ddarRepoConfig ddarrepo) []
return ("ssh", os ++ remoteParams)
where
(host, ddarrepo') = splitRemoteDdarRepo ddarrepo
localParams = Param [cmd] : Param (ddarRepoLocation ddarrepo) : params
remoteParams = Param host : Param "ddar" : Param [cmd] : Param ddarrepo' : params
{- Specialized ddarRemoteCall that includes extraction command and flags -}
ddarExtractRemoteCall :: DdarRepo -> Key -> Annex (String, [CommandParam])
ddarExtractRemoteCall ddarrepo k =
ddarRemoteCall ddarrepo 'x' [Param "--force-stdout", Param $ key2file k]
retrieve :: DdarRepo -> Retriever
retrieve ddarrepo = byteRetriever $ \k sink -> do
(cmd, params) <- ddarExtractRemoteCall ddarrepo k
let p = (proc cmd $ toCommand params) { std_out = CreatePipe }
(_, Just h, _, pid) <- liftIO $ createProcess p
liftIO (hClose h >> forceSuccessProcess p pid)
`after` (sink =<< liftIO (L.hGetContents h))
retrieveCheap :: Key -> AssociatedFile -> FilePath -> Annex Bool
retrieveCheap _ _ _ = return False
remove :: DdarRepo -> Remover
remove ddarrepo key = do
(cmd, params) <- ddarRemoteCall ddarrepo 'd' [Param $ key2file key]
liftIO $ boolSystem cmd params
ddarDirectoryExists :: DdarRepo -> Annex (Either String Bool)
ddarDirectoryExists ddarrepo
| ddarLocal ddarrepo = do
maybeStatus <- liftIO $ tryJust (guard . isDoesNotExistError) $ getFileStatus $ ddarRepoLocation ddarrepo
return $ case maybeStatus of
Left _ -> Right False
Right status -> Right $ isDirectory status
| otherwise = do
ps <- sshOptions (host, Nothing) (ddarRepoConfig ddarrepo) []
exitCode <- liftIO $ safeSystem "ssh" (ps ++ params)
case exitCode of
ExitSuccess -> return $ Right True
ExitFailure 1 -> return $ Right False
ExitFailure code -> return $ Left $ "ssh call " ++
show (unwords $ toCommand params) ++
" failed with status " ++ show code
where
(host, ddarrepo') = splitRemoteDdarRepo ddarrepo
params =
[ Param host
, Param "test"
, Param "-d"
, Param ddarrepo'
]
{- Use "ddar t" to determine if a given key is present in a ddar archive -}
inDdarManifest :: DdarRepo -> Key -> Annex (Either String Bool)
inDdarManifest ddarrepo k = do
(cmd, params) <- ddarRemoteCall ddarrepo 't' []
let p = proc cmd $ toCommand params
liftIO $ catchMsgIO $ withHandle StdoutHandle createProcessSuccess p $ \h -> do
contents <- hGetContents h
return $ elem k' $ lines contents
where
k' = key2file k
checkKey :: DdarRepo -> CheckPresent
checkKey ddarrepo key = do
directoryExists <- ddarDirectoryExists ddarrepo
case directoryExists of
Left e -> error e
Right True -> either error return
=<< inDdarManifest ddarrepo key
Right False -> return False
ddarLocal :: DdarRepo -> Bool
ddarLocal = notElem ':' . ddarRepoLocation
|
