summaryrefslogtreecommitdiff
path: root/Messages.hs
blob: a0bd20ca3ce692e1866f91a8fd987bc4fcc6f17b (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
{- git-annex output messages
 -
 - Copyright 2010-2011 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Messages (
	showStart,
	showNote,
	showAction,
	showProgress,
	showSideAction,
	showOutput,
	showLongNote,
	showEndOk,
	showEndFail,
	showEndResult,
	showErr,
	warning,
	indent,
	maybeShowJSON,
	showFullJSON,
	showCustom,
	showHeader,
	showRaw,
	
	setupConsole
) where

import Text.JSON

import Common
import Types
import qualified Annex
import qualified Messages.JSON as JSON

showStart :: String -> String -> Annex ()
showStart command file = handle (JSON.start command $ Just file) $
	flushed $ putStr $ command ++ " " ++ file ++ " "

showNote :: String -> Annex ()
showNote s = handle (JSON.note s) $
	flushed $ putStr $ "(" ++ s ++ ") "

showAction :: String -> Annex ()
showAction s = showNote $ s ++ "..."

showProgress :: Annex ()
showProgress = handle q $
	flushed $ putStr "."

showSideAction :: String -> Annex ()
showSideAction s = handle q $
	putStrLn $ "(" ++ s ++ "...)"

showOutput :: Annex ()
showOutput = handle q $
	putStr "\n"

showLongNote :: String -> Annex ()
showLongNote s = handle (JSON.note s) $
	putStrLn $ '\n' : indent s

showEndOk :: Annex ()
showEndOk = showEndResult True

showEndFail :: Annex ()
showEndFail = showEndResult False

showEndResult :: Bool -> Annex ()
showEndResult ok = handle (JSON.end ok) $ putStrLn msg
	where
		msg
			| ok = "ok"
			| otherwise = "failed"

showErr :: (Show a) => a -> Annex ()
showErr e = warning' $ "git-annex: " ++ show e

warning :: String -> Annex ()
warning = warning' . indent

warning' :: String -> Annex ()
warning' w = do
	handle q $ putStr "\n"
	liftIO $ do
		hFlush stdout
		hPutStrLn stderr w

indent :: String -> String
indent = join "\n" . map (\l -> "  " ++ l) . lines

{- Shows a JSON fragment only when in json mode. -}
maybeShowJSON :: JSON a => [(String, a)] -> Annex ()
maybeShowJSON v = handle (JSON.add v) q

{- Shows a complete JSON value, only when in json mode. -}
showFullJSON :: JSON a => [(String, a)] -> Annex Bool
showFullJSON v = Annex.getState Annex.output >>= liftIO . go
	where
		go Annex.JSONOutput = JSON.complete v >> return True
		go _ = return False

{- Performs an action that outputs nonstandard/customized output, and
 - in JSON mode wraps its output in JSON.start and JSON.end, so it's
 - a complete JSON document.
 - This is only needed when showStart and showEndOk is not used. -}
showCustom :: String -> Annex Bool -> Annex ()
showCustom command a = do
	handle (JSON.start command Nothing) q
	r <- a
	handle (JSON.end r) q

showHeader :: String -> Annex ()
showHeader h = handle q $
	flushed $ putStr $ h ++ ": "

showRaw :: String -> Annex ()
showRaw s = handle q $ putStrLn s

{- This avoids ghc's output layer crashing on invalid encoded characters in
 - files when printing them out.
 -}
setupConsole :: IO ()
setupConsole = do
	fileEncoding stdout
	fileEncoding stderr

handle :: IO () -> IO () -> Annex ()
handle json normal = Annex.getState Annex.output >>= go
	where
		go Annex.NormalOutput = liftIO normal
		go Annex.QuietOutput = q
		go Annex.JSONOutput = liftIO $ flushed $ json

q :: Monad m => m ()
q = return ()

flushed :: IO () -> IO ()
flushed a = a >> hFlush stdout