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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
{- A remote that is only accessible by rsync.
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote.Rsync (remote) where
import qualified Data.ByteString.Lazy.Char8 as L
import qualified Data.Map as M
import Common.Annex
import Types.Remote
import qualified Git
import Config
import Annex.Content
import Remote.Helper.Special
import Remote.Helper.Encryptable
import Crypto
import Utility.RsyncFile
type RsyncUrl = String
data RsyncOpts = RsyncOpts
{ rsyncUrl :: RsyncUrl
, rsyncOptions :: [CommandParam]
, rsyncShellEscape :: Bool
}
remote :: RemoteType
remote = RemoteType {
typename = "rsync",
enumerate = findSpecialRemotes "rsyncurl",
generate = gen,
setup = rsyncSetup
}
gen :: Git.Repo -> UUID -> Maybe RemoteConfig -> Annex Remote
gen r u c = do
o <- genRsyncOpts r c
cst <- remoteCost r expensiveRemoteCost
return $ encryptableRemote c
(storeEncrypted o)
(retrieveEncrypted o)
Remote {
uuid = u,
cost = cst,
name = Git.repoDescribe r,
storeKey = store o,
retrieveKeyFile = retrieve o,
retrieveKeyFileCheap = retrieveCheap o,
removeKey = remove o,
hasKey = checkPresent r o,
hasKeyCheap = False,
whereisKey = Nothing,
config = Nothing,
repo = r,
remotetype = remote
}
genRsyncOpts :: Git.Repo -> Maybe RemoteConfig -> Annex RsyncOpts
genRsyncOpts r c = do
url <- getRemoteConfig r "rsyncurl" (error "missing rsyncurl")
opts <- map Param . filter safe . words
<$> getRemoteConfig r "rsync-options" ""
let escape = maybe True (\m -> M.lookup "shellescape" m /= Just "no") c
return $ RsyncOpts url opts escape
where
safe o
-- Don't allow user to pass --delete to rsync;
-- that could cause it to delete other keys
-- in the same hash bucket as a key it sends.
| o == "--delete" = False
| o == "--delete-excluded" = False
| otherwise = True
rsyncSetup :: UUID -> RemoteConfig -> Annex RemoteConfig
rsyncSetup u c = do
-- verify configuration is sane
let url = fromMaybe (error "Specify rsyncurl=") $
M.lookup "rsyncurl" c
c' <- encryptionSetup c
-- The rsyncurl is stored in git config, not only in this remote's
-- persistant state, so it can vary between hosts.
gitConfigSpecialRemote u c' "rsyncurl" url
return c'
rsyncEscape :: RsyncOpts -> String -> String
rsyncEscape o s
| rsyncShellEscape o && rsyncUrlIsShell (rsyncUrl o) = shellEscape s
| otherwise = s
rsyncUrls :: RsyncOpts -> Key -> [String]
rsyncUrls o k = map use annexHashes
where
use h = rsyncUrl o </> h k </> rsyncEscape o (f </> f)
f = keyFile k
store :: RsyncOpts -> Key -> Annex Bool
store o k = rsyncSend o k =<< inRepo (gitAnnexLocation k)
storeEncrypted :: RsyncOpts -> (Cipher, Key) -> Key -> Annex Bool
storeEncrypted o (cipher, enck) k = withTmp enck $ \tmp -> do
src <- inRepo $ gitAnnexLocation k
liftIO $ withEncryptedContent cipher (L.readFile src) $ L.writeFile tmp
rsyncSend o enck tmp
retrieve :: RsyncOpts -> Key -> FilePath -> Annex Bool
retrieve o k f = untilTrue (rsyncUrls o k) $ \u -> rsyncRemote o
-- use inplace when retrieving to support resuming
[ Param "--inplace"
, Param u
, Param f
]
retrieveCheap :: RsyncOpts -> Key -> FilePath -> Annex Bool
retrieveCheap o k f = ifM (preseedTmp k f) ( retrieve o k f , return False )
retrieveEncrypted :: RsyncOpts -> (Cipher, Key) -> Key -> FilePath -> Annex Bool
retrieveEncrypted o (cipher, enck) _ f = withTmp enck $ \tmp -> do
ifM (retrieve o enck tmp)
( liftIO $ catchBoolIO $ do
withDecryptedContent cipher (L.readFile tmp) $ L.writeFile f
return True
, return False
)
remove :: RsyncOpts -> Key -> Annex Bool
remove o k = withRsyncScratchDir $ \tmp -> liftIO $ do
{- Send an empty directory to rysnc to make it delete. -}
let dummy = tmp </> keyFile k
createDirectoryIfMissing True dummy
rsync $ rsyncOptions o ++
map (\s -> Param $ "--include=" ++ s) includes ++
[ Param "--exclude=*" -- exclude everything else
, Params "--quiet --delete --recursive"
, partialParams
, Param $ addTrailingPathSeparator dummy
, Param $ rsyncUrl o
]
where
{- Specify include rules to match the directories where the
- content could be. Note that the parent directories have
- to also be explicitly included, due to how rsync
- traverses directories. -}
includes = concatMap use annexHashes
use h = let dir = h k in
[ parentDir dir
, dir
-- match content directory and anything in it
, dir </> keyFile k </> "***"
]
checkPresent :: Git.Repo -> RsyncOpts -> Key -> Annex (Either String Bool)
checkPresent r o k = do
showAction $ "checking " ++ Git.repoDescribe r
-- note: Does not currently differentiate between rsync failing
-- to connect, and the file not being present.
Right <$> check
where
check = untilTrue (rsyncUrls o k) $ \u ->
liftIO $ boolSystem "sh" [Param "-c", Param (cmd u)]
cmd u = "rsync --quiet " ++ shellEscape u ++ " 2>/dev/null"
{- Rsync params to enable resumes of sending files safely,
- ensure that files are only moved into place once complete
-}
partialParams :: CommandParam
partialParams = Params "--no-inplace --partial --partial-dir=.rsync-partial"
{- Runs an action in an empty scratch directory that can be used to build
- up trees for rsync. -}
withRsyncScratchDir :: (FilePath -> Annex Bool) -> Annex Bool
withRsyncScratchDir a = do
pid <- liftIO getProcessID
t <- fromRepo gitAnnexTmpDir
let tmp = t </> "rsynctmp" </> show pid
nuke tmp
liftIO $ createDirectoryIfMissing True tmp
nuke tmp `after` a tmp
where
nuke d = liftIO $ whenM (doesDirectoryExist d) $
removeDirectoryRecursive d
rsyncRemote :: RsyncOpts -> [CommandParam] -> Annex Bool
rsyncRemote o params = do
showOutput -- make way for progress bar
ifM (liftIO $ rsync $ rsyncOptions o ++ defaultParams ++ params)
( return True
, do
showLongNote "rsync failed -- run git annex again to resume file transfer"
return False
)
where
defaultParams = [Params "--progress"]
{- To send a single key is slightly tricky; need to build up a temporary
directory structure to pass to rsync so it can create the hash
directories. -}
rsyncSend :: RsyncOpts -> Key -> FilePath -> Annex Bool
rsyncSend o k src = withRsyncScratchDir $ \tmp -> do
let dest = tmp </> Prelude.head (keyPaths k)
liftIO $ createDirectoryIfMissing True $ parentDir dest
liftIO $ createLink src dest
rsyncRemote o
[ Param "--recursive"
, partialParams
-- tmp/ to send contents of tmp dir
, Param $ addTrailingPathSeparator tmp
, Param $ rsyncUrl o
]
|
