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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
{- Standard git remotes.
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote.Git (remote) where
import Control.Exception.Extensible
import Control.Monad.State (liftIO)
import qualified Data.Map as M
import System.Cmd.Utils
import System.Posix.Files
import System.IO
import Types
import Types.Remote
import qualified Git
import qualified Annex
import Locations
import UUID
import Utility
import qualified Content
import Messages
import Utility.CopyFile
import Utility.RsyncFile
import Utility.Ssh
import Utility.SafeCommand
import Utility.Path
import qualified Utility.Url as Url
import Config
import Init
remote :: RemoteType Annex
remote = RemoteType {
typename = "git",
enumerate = list,
generate = gen,
setup = error "not supported"
}
list :: Annex [Git.Repo]
list = do
g <- Annex.gitRepo
return $ Git.remotes g
gen :: Git.Repo -> UUID -> Maybe RemoteConfig -> Annex (Remote Annex)
gen r u _ = do
{- It's assumed to be cheap to read the config of non-URL remotes,
- so this is done each time git-annex is run. Conversely,
- the config of an URL remote is only read when there is no
- cached UUID value. -}
let cheap = not $ Git.repoIsUrl r
r' <- case (cheap, u) of
(True, _) -> tryGitConfigRead r
(False, "") -> tryGitConfigRead r
_ -> return r
u' <- getUUID r'
let defcst = if cheap then cheapRemoteCost else expensiveRemoteCost
cst <- remoteCost r' defcst
return Remote {
uuid = u',
cost = cst,
name = Git.repoDescribe r',
storeKey = copyToRemote r',
retrieveKeyFile = copyFromRemote r',
removeKey = dropKey r',
hasKey = inAnnex r',
hasKeyCheap = cheap,
config = Nothing
}
{- Tries to read the config for a specified remote, updates state, and
- returns the updated repo. -}
tryGitConfigRead :: Git.Repo -> Annex Git.Repo
tryGitConfigRead r
| not $ M.null $ Git.configMap r = return r -- already read
| Git.repoIsSsh r = store $ onRemote r (pipedconfig, r) "configlist" []
| Git.repoIsHttp r = store $ safely $ geturlconfig
| Git.repoIsUrl r = return r
| otherwise = store $ safely $ do
onLocal r ensureInitialized
Git.configRead r
where
-- Reading config can fail due to IO error or
-- for other reasons; catch all possible exceptions.
safely a = do
result <- liftIO (try a :: IO (Either SomeException Git.Repo))
case result of
Left _ -> return r
Right r' -> return r'
pipedconfig cmd params = safely $
pOpen ReadFromPipe cmd (toCommand params) $
Git.hConfigRead r
geturlconfig = do
s <- Url.get (Git.repoLocation r ++ "/config")
withTempFile "git-annex.tmp" $ \tmpfile -> \h -> do
hPutStr h s
hClose h
pOpen ReadFromPipe "git" ["config", "--list", "--file", tmpfile] $
Git.hConfigRead r
store a = do
r' <- a
g <- Annex.gitRepo
let l = Git.remotes g
let g' = Git.remotesAdd g $ exchange l r'
Annex.changeState $ \s -> s { Annex.repo = g' }
return r'
exchange [] _ = []
exchange (old:ls) new =
if Git.repoRemoteName old == Git.repoRemoteName new
then new : exchange ls new
else old : exchange ls new
{- Checks if a given remote has the content for a key inAnnex.
- If the remote cannot be accessed, returns a Left error.
-}
inAnnex :: Git.Repo -> Key -> Annex (Either IOException Bool)
inAnnex r key
| Git.repoIsHttp r = safely checkhttp
| Git.repoIsUrl r = checkremote
| otherwise = safely checklocal
where
checklocal = onLocal r (Content.inAnnex key)
checkremote = do
showAction $ "checking " ++ Git.repoDescribe r
inannex <- onRemote r (boolSystem, False) "inannex"
[Param (show key)]
return $ Right inannex
checkhttp = Url.exists $ keyUrl r key
safely a = liftIO (try a ::IO (Either IOException Bool))
{- Runs an action on a local repository inexpensively, by making an annex
- monad using that repository. -}
onLocal :: Git.Repo -> Annex a -> IO a
onLocal r a = do
annex <- Annex.new r
Annex.eval annex a
keyUrl :: Git.Repo -> Key -> String
keyUrl r key = Git.repoLocation r ++ "/" ++ annexLocation key
dropKey :: Git.Repo -> Key -> Annex Bool
dropKey r key
| Git.repoIsHttp r = error "dropping from http repo not supported"
| otherwise = onRemote r (boolSystem, False) "dropkey"
[ Params "--quiet --force"
, Param $ show key
]
{- Tries to copy a key's content from a remote's annex to a file. -}
copyFromRemote :: Git.Repo -> Key -> FilePath -> Annex Bool
copyFromRemote r key file
| not $ Git.repoIsUrl r = rsyncOrCopyFile r (gitAnnexLocation r key) file
| Git.repoIsSsh r = rsyncHelper =<< rsyncParamsRemote r True key file
| Git.repoIsHttp r = Url.download (keyUrl r key) file
| otherwise = error "copying from non-ssh, non-http repo not supported"
{- Tries to copy a key's content to a remote's annex. -}
copyToRemote :: Git.Repo -> Key -> Annex Bool
copyToRemote r key
| not $ Git.repoIsUrl r = do
g <- Annex.gitRepo
let keysrc = gitAnnexLocation g key
-- run copy from perspective of remote
liftIO $ onLocal r $ do
ok <- Content.getViaTmp key $
rsyncOrCopyFile r keysrc
Content.saveState
return ok
| Git.repoIsSsh r = do
g <- Annex.gitRepo
let keysrc = gitAnnexLocation g key
rsyncHelper =<< rsyncParamsRemote r False key keysrc
| otherwise = error "copying to non-ssh repo not supported"
rsyncHelper :: [CommandParam] -> Annex Bool
rsyncHelper p = do
showOutput -- make way for progress bar
res <- liftIO $ rsync p
if res
then return res
else do
showLongNote "rsync failed -- run git annex again to resume file transfer"
return res
{- Copys a file with rsync unless both locations are on the same
- filesystem. Then cp could be faster. -}
rsyncOrCopyFile :: Git.Repo -> FilePath -> FilePath -> Annex Bool
rsyncOrCopyFile r src dest = do
ss <- liftIO $ getFileStatus $ parentDir src
ds <- liftIO $ getFileStatus $ parentDir dest
if deviceID ss == deviceID ds
then liftIO $ copyFile src dest
else do
params <- rsyncParams r
rsyncHelper $ params ++ [Param src, Param dest]
{- Generates rsync parameters that ssh to the remote and asks it
- to either receive or send the key's content. -}
rsyncParamsRemote :: Git.Repo -> Bool -> Key -> FilePath -> Annex [CommandParam]
rsyncParamsRemote r sending key file = do
Just (shellcmd, shellparams) <- git_annex_shell r
(if sending then "sendkey" else "recvkey")
[ Param $ show key
-- Command is terminated with "--", because
-- rsync will tack on its own options afterwards,
-- and they need to be ignored.
, Param "--"
]
-- Convert the ssh command into rsync command line.
let eparam = rsyncShell (Param shellcmd:shellparams)
o <- rsyncParams r
if sending
then return $ o ++ eparam ++ [dummy, File file]
else return $ o ++ eparam ++ [File file, dummy]
where
-- the rsync shell parameter controls where rsync
-- goes, so the source/dest parameter can be a dummy value,
-- that just enables remote rsync mode.
dummy = Param ":"
rsyncParams :: Git.Repo -> Annex [CommandParam]
rsyncParams r = do
o <- getConfig r "rsync-options" ""
return $ options ++ map Param (words o)
where
-- --inplace to resume partial files
options = [Params "-p --progress --inplace"]
|
