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
|
{- git-annex core functions
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Core where
import IO (try)
import System.Directory
import Control.Monad.State (liftIO)
import System.Path
import Control.Monad (when, unless, filterM)
import System.Posix.Files
import Data.Maybe
import Types
import Locations
import LocationLog
import UUID
import qualified GitRepo as Git
import qualified GitQueue
import qualified Annex
import qualified Backend
import Utility
import Messages
import Version
{- Runs a list of Annex actions. Catches IO errors and continues
- (but explicitly thrown errors terminate the whole command).
- Propigates an overall error status at the end.
-}
tryRun :: AnnexState -> [Annex Bool] -> IO ()
tryRun state actions = tryRun' state 0 actions
tryRun' :: AnnexState -> Integer -> [Annex Bool] -> IO ()
tryRun' state errnum (a:as) = do
result <- try $ Annex.run state a
case (result) of
Left err -> do
Annex.eval state $ showErr err
tryRun' state (errnum + 1) as
Right (True,state') -> tryRun' state' errnum as
Right (False,state') -> tryRun' state' (errnum + 1) as
tryRun' _ errnum [] =
when (errnum > 0) $ error $ show errnum ++ " failed"
{- Sets up a git repo for git-annex. -}
startup :: Annex Bool
startup = do
prepUUID
autoUpgrade
return True
{- When git-annex is done, it runs this. -}
shutdown :: Annex Bool
shutdown = do
q <- Annex.queueGet
unless (q == GitQueue.empty) $ do
showSideAction "Recording state in git..."
Annex.queueRun
-- clean up any files left in the temp directory, but leave
-- the tmp directory itself
g <- Annex.gitRepo
let tmp = annexTmpLocation g
exists <- liftIO $ doesDirectoryExist tmp
when (exists) $ liftIO $ removeDirectoryRecursive tmp
liftIO $ createDirectoryIfMissing True tmp
return True
{- configure git to use union merge driver on state files, if it is not
- already -}
gitAttributes :: Git.Repo -> IO ()
gitAttributes repo = do
exists <- doesFileExist attributes
if (not exists)
then do
writeFile attributes $ attrLine ++ "\n"
commit
else do
content <- readFile attributes
when (all (/= attrLine) (lines content)) $ do
appendFile attributes $ attrLine ++ "\n"
commit
where
attrLine = stateLoc ++ "*.log merge=union"
attributes = Git.attributes repo
commit = do
Git.run repo ["add", attributes]
Git.run repo ["commit", "-m", "git-annex setup",
attributes]
{- set up a git pre-commit hook, if one is not already present -}
gitPreCommitHook :: Git.Repo -> IO ()
gitPreCommitHook repo = do
let hook = Git.workTree repo ++ "/" ++ Git.gitDir repo ++
"/hooks/pre-commit"
exists <- doesFileExist hook
if (exists)
then putStrLn $ "pre-commit hook (" ++ hook ++ ") already exists, not configuring"
else do
writeFile hook $ "#!/bin/sh\n" ++
"# automatically configured by git-annex\n" ++
"git annex pre-commit .\n"
p <- getPermissions hook
setPermissions hook $ p {executable = True}
{- Checks if a given key is currently present in the annexLocation. -}
inAnnex :: Key -> Annex Bool
inAnnex key = do
g <- Annex.gitRepo
when (Git.repoIsUrl g) $ error "inAnnex cannot check remote repo"
liftIO $ doesFileExist $ annexLocation g key
{- Calculates the relative path to use to link a file to a key. -}
calcGitLink :: FilePath -> Key -> Annex FilePath
calcGitLink file key = do
g <- Annex.gitRepo
cwd <- liftIO $ getCurrentDirectory
let absfile = case (absNormPath cwd file) of
Just f -> f
Nothing -> error $ "unable to normalize " ++ file
return $ relPathDirToDir (parentDir absfile) (Git.workTree g) ++
annexLocationRelative key
{- Updates the LocationLog when a key's presence changes. -}
logStatus :: Key -> LogStatus -> Annex ()
logStatus key status = do
g <- Annex.gitRepo
u <- getUUID g
logfile <- liftIO $ logChange g key u status
Annex.queue "add" [] logfile
{- Runs an action, passing it a temporary filename to download,
- and if the action succeeds, moves the temp file into
- the annex as a key's content. -}
getViaTmp :: Key -> (FilePath -> Annex Bool) -> Annex Bool
getViaTmp key action = do
g <- Annex.gitRepo
let tmp = annexTmpLocation g ++ keyFile key
liftIO $ createDirectoryIfMissing True (parentDir tmp)
success <- action tmp
if (success)
then do
moveToObjectDir key tmp
logStatus key ValuePresent
return True
else do
-- the tmp file is left behind, in case caller wants
-- to resume its transfer
return False
{- Moves a file into .git/annex/objects/ -}
moveToObjectDir :: Key -> FilePath -> Annex ()
moveToObjectDir key src = do
g <- Annex.gitRepo
let dest = annexLocation g key
liftIO $ createDirectoryIfMissing True (parentDir dest)
liftIO $ renameFile src dest
-- TODO directory and file mode tweaks
{- List of keys whose content exists in .git/annex/objects/ -}
getKeysPresent :: Annex [Key]
getKeysPresent = do
g <- Annex.gitRepo
getKeysPresent' $ annexObjectDir g
getKeysPresent' :: FilePath -> Annex [Key]
getKeysPresent' dir = do
contents <- liftIO $ getDirectoryContents dir
files <- liftIO $ filterM isreg contents
return $ map fileKey files
where
isreg f = do
s <- getFileStatus $ dir ++ "/" ++ f
return $ isRegularFile s
{- List of keys referenced by symlinks in the git repo. -}
getKeysReferenced :: Annex [Key]
getKeysReferenced = do
g <- Annex.gitRepo
files <- liftIO $ Git.inRepo g $ Git.workTree g
keypairs <- mapM Backend.lookupFile files
return $ map fst $ catMaybes keypairs
{- Uses the annex.version git config setting to automate upgrades. -}
autoUpgrade :: Annex ()
autoUpgrade = do
version <- getVersion
case version of
Just "0" -> upgradeFrom0
Nothing -> return () -- repo not initted yet, no version
Just v | v == currentVersion -> return ()
Just _ -> error "this version of git-annex is too old for this git repository!"
upgradeFrom0 :: Annex ()
upgradeFrom0 = do
showSideAction "Upgrading object directory layout for git-annex 0.04..."
g <- Annex.gitRepo
-- do the reorganisation of the files
let olddir = annexDir g
keys <- getKeysPresent' olddir
_ <- mapM (\k -> moveToObjectDir k $ olddir ++ "/" ++ keyFile k) keys
-- update the symlinks to the files
files <- liftIO $ Git.inRepo g $ Git.workTree g
fixlinks files
Annex.queueRun
setVersion
where
fixlinks [] = return ()
fixlinks (f:fs) = do
r <- Backend.lookupFile f
case r of
Nothing -> return ()
Just (k, _) -> do
link <- calcGitLink f k
liftIO $ removeFile f
liftIO $ createSymbolicLink link f
Annex.queue "add" [] f
fixlinks fs
|