summaryrefslogtreecommitdiff
path: root/Upgrade/V2.hs
blob: ffc2f60022d26280d1a66ea4ad1ca10bde79d759 (plain)
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
{- git-annex v2 -> v3 upgrade support
 -
 - Copyright 2011 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Upgrade.V2 where

import Common.Annex
import qualified Git
import qualified Git.Command
import qualified Git.Ref
import qualified Annex.Branch
import Logs.Location
import Annex.Content
import Utility.TempFile

olddir :: Git.Repo -> FilePath
olddir g
	| Git.repoIsLocalBare g = ""
	| otherwise = ".git-annex"

{- .git-annex/ moved to a git-annex branch.
 - 
 - Strategy:
 - 
 - * Create the git-annex branch.
 - * Find each location log file in .git-annex/, and inject its content
 -   into the git-annex branch, unioning with any content already in
 -   there. (in passing, this deals with the semi transition that left
 -   some location logs hashed two different ways; both are found and
 -   merged).
 - * Also inject remote.log, trust.log, and uuid.log.
 - * git rm -rf .git-annex
 - * Remove stuff that used to be needed in .gitattributes.
 - * Commit changes.
 -}
upgrade :: Annex Bool
upgrade = do
	showAction "v2 to v3"
	bare <- fromRepo Git.repoIsLocalBare
	old <- fromRepo olddir

	Annex.Branch.create
	showProgress

	e <- liftIO $ doesDirectoryExist old
	when e $ do
		mapM_ (\(k, f) -> inject f $ logFile k) =<< locationLogs
		mapM_ (\f -> inject f f) =<< logFiles old

	saveState
	showProgress

	when e $ do
		inRepo $ Git.Command.run "rm" [Param "-r", Param "-f", Param "-q", File old]
		unless bare $ inRepo gitAttributesUnWrite
	showProgress

	unless bare push

	return True

locationLogs :: Annex [(Key, FilePath)]
locationLogs = do
	dir <- fromRepo gitStateDir
	liftIO $ do
		levela <- dirContents dir
		levelb <- mapM tryDirContents levela
		files <- mapM tryDirContents (concat levelb)
		return $ mapMaybe islogfile (concat files)
	where
		tryDirContents d = catchDefaultIO (dirContents d) []
		islogfile f = maybe Nothing (\k -> Just (k, f)) $
				logFileKey $ takeFileName f

inject :: FilePath -> FilePath -> Annex ()
inject source dest = do
	old <- fromRepo olddir
	new <- liftIO (readFile $ old </> source)
	Annex.Branch.change dest $ \prev -> 
		unlines $ nub $ lines prev ++ lines new

logFiles :: FilePath -> Annex [FilePath]
logFiles dir = return . filter (".log" `isSuffixOf`)
		=<< liftIO (getDirectoryContents dir)

push :: Annex ()
push = do
	origin_master <- inRepo $ Git.Ref.exists $ Git.Ref "origin/master"
	origin_gitannex <- Annex.Branch.hasOrigin
	case (origin_master, origin_gitannex) of
		(_, True) -> do
			-- Merge in the origin's git-annex branch,
			-- so that pushing the git-annex branch
			-- will immediately work. Not pushed here,
			-- because it's less obnoxious to let the user
			-- push.
			Annex.Branch.update
		(True, False) -> do
			-- push git-annex to origin, so that
			-- "git push" will from then on
			-- automatically push it
			Annex.Branch.update -- just in case
			showAction "pushing new git-annex branch to origin"
			showOutput
			inRepo $ Git.Command.run "push"
				[Param "origin", Param $ show Annex.Branch.name]
		_ -> do
			-- no origin exists, so just let the user
			-- know about the new branch
			Annex.Branch.update
			showLongNote $
				"git-annex branch created\n" ++
				"Be sure to push this branch when pushing to remotes.\n"

{- Old .gitattributes contents, not needed anymore. -}
attrLines :: [String]
attrLines =
	[ stateDir </> "*.log merge=union"
	, stateDir </> "*/*/*.log merge=union"
	]

gitAttributesUnWrite :: Git.Repo -> IO ()
gitAttributesUnWrite repo = do
	let attributes = Git.attributes repo
	whenM (doesFileExist attributes) $ do
		c <- readFileStrict attributes
		liftIO $ viaTmp writeFile attributes $ unlines $
			filter (`notElem` attrLines) $ lines c
		Git.Command.run "add" [File attributes] repo

stateDir :: FilePath
stateDir = addTrailingPathSeparator ".git-annex"
gitStateDir :: Git.Repo -> FilePath
gitStateDir repo = addTrailingPathSeparator $ Git.workTree repo </> stateDir