summaryrefslogtreecommitdiff
path: root/Git/LsFiles.hs
blob: 4f8ac3fc6167eee3a69c2703a390e86b4ebb8a92 (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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
{- git ls-files interface
 -
 - Copyright 2010,2012 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Git.LsFiles (
	inRepo,
	notInRepo,
	staged,
	stagedNotDeleted,
	changedUnstaged,
	typeChanged,
	typeChangedStaged,
	Conflicting(..),
	Unmerged(..),
	unmerged,
) where

import Common
import Git
import Git.Command
import Git.Types
import Git.Sha

{- Scans for files that are checked into git at the specified locations. -}
inRepo :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
inRepo l = pipeNullSplit $ Params "ls-files --cached -z --" : map File l

{- Scans for files at the specified locations that are not checked into git. -}
notInRepo :: Bool -> [FilePath] -> Repo -> IO ([FilePath], IO Bool)
notInRepo include_ignored l repo = pipeNullSplit params repo
	where
		params = [Params "ls-files --others"] ++ exclude ++
			[Params "-z --"] ++ map File l
		exclude
			| include_ignored = []
			| otherwise = [Param "--exclude-standard"]

{- Returns a list of all files that are staged for commit. -}
staged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
staged = staged' []

{- Returns a list of the files, staged for commit, that are being added,
 - moved, or changed (but not deleted), from the specified locations. -}
stagedNotDeleted :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
stagedNotDeleted = staged' [Param "--diff-filter=ACMRT"]

staged' :: [CommandParam] -> [FilePath] -> Repo -> IO ([FilePath], IO Bool)
staged' ps l = pipeNullSplit $ prefix ++ ps ++ suffix
	where
		prefix = [Params "diff --cached --name-only -z"]
		suffix = Param "--" : map File l

{- Returns a list of files that have unstaged changes. -}
changedUnstaged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
changedUnstaged l = pipeNullSplit params
	where
		params = Params "diff --name-only -z --" : map File l

{- Returns a list of the files in the specified locations that are staged
 - for commit, and whose type has changed. -}
typeChangedStaged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
typeChangedStaged = typeChanged' [Param "--cached"]

{- Returns a list of the files in the specified locations whose type has
 - changed.  Files only staged for commit will not be included. -}
typeChanged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
typeChanged = typeChanged' []

typeChanged' :: [CommandParam] -> [FilePath] -> Repo -> IO ([FilePath], IO Bool)
typeChanged' ps l repo = do
	(fs, cleanup) <- pipeNullSplit (prefix ++ ps ++ suffix) repo
	-- git diff returns filenames relative to the top of the git repo;
	-- convert to filenames relative to the cwd, like git ls-files.
	let top = repoPath repo
	cwd <- getCurrentDirectory
	return (map (\f -> relPathDirToFile cwd $ top </> f) fs, cleanup)
	where
		prefix = [Params "diff --name-only --diff-filter=T -z"]
		suffix = Param "--" : map File l

{- A item in conflict has two possible values.
 - Either can be Nothing, when that side deleted the file. -}
data Conflicting v = Conflicting
	{ valUs :: Maybe v
	, valThem :: Maybe v
	} deriving (Show)

data Unmerged = Unmerged
	{ unmergedFile :: FilePath
	, unmergedBlobType :: Conflicting BlobType
	, unmergedSha :: Conflicting Sha
	} deriving (Show)

{- Returns a list of the files in the specified locations that have
 - unresolved merge conflicts.
 -
 - ls-files outputs multiple lines per conflicting file, each with its own
 - stage number:
 -   1 = old version, can be ignored
 -   2 = us
 -   3 = them
 - If a line is omitted, that side deleted the file.
 -}
unmerged :: [FilePath] -> Repo -> IO ([Unmerged], IO Bool)
unmerged l repo = do
	(fs, cleanup) <- pipeNullSplit params repo
	return (reduceUnmerged [] $ catMaybes $ map parseUnmerged fs, cleanup)
	where
		params = Params "ls-files --unmerged -z --" : map File l

data InternalUnmerged = InternalUnmerged
	{ isus :: Bool
	, ifile :: FilePath
	, iblobtype :: Maybe BlobType
	, isha :: Maybe Sha
	} deriving (Show)

parseUnmerged :: String -> Maybe InternalUnmerged
parseUnmerged s
	| null file = Nothing
	| otherwise = case words metadata of
		(rawblobtype:rawsha:rawstage:_) -> do
			stage <- readish rawstage :: Maybe Int
			unless (stage == 2 || stage == 3) $
				fail undefined -- skip stage 1
			blobtype <- readBlobType rawblobtype
			sha <- extractSha rawsha
			return $ InternalUnmerged (stage == 2) file
				(Just blobtype) (Just sha)
		_ -> Nothing
	where
		(metadata, file) = separate (== '\t') s

reduceUnmerged :: [Unmerged] -> [InternalUnmerged] -> [Unmerged]
reduceUnmerged c [] = c
reduceUnmerged c (i:is) = reduceUnmerged (new:c) rest
	where
		(rest, sibi) = findsib i is
		(blobtypeA, blobtypeB, shaA, shaB)
			| isus i    = (iblobtype i, iblobtype sibi, isha i, isha sibi)
			| otherwise = (iblobtype sibi, iblobtype i, isha sibi, isha i)
		new = Unmerged
			{ unmergedFile = ifile i
			, unmergedBlobType = Conflicting blobtypeA blobtypeB
			, unmergedSha = Conflicting shaA shaB
			}
		findsib templatei [] = ([], deleted templatei)
		findsib templatei (l:ls)
			| ifile l == ifile templatei = (ls, l)
			| otherwise = (l:ls, deleted templatei)
		deleted templatei = templatei
			{ isus = not (isus templatei)
			, iblobtype = Nothing
			, isha = Nothing
			}