summaryrefslogtreecommitdiff
path: root/Messages.hs
blob: cec0cb8a328ccead50f32c45653169a99e304b9a (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
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
{- git-annex output messages
 -
 - Copyright 2010-2014 Joey Hess <id@joeyh.name>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Messages (
	showStart,
	showStart',
	showNote,
	showAction,
	showSideAction,
	doSideAction,
	doQuietSideAction,
	showStoringStateAction,
	showOutput,
	showLongNote,
	showEndOk,
	showEndFail,
	showEndResult,
	endResult,
	toplevelWarning,
	warning,
	earlyWarning,
	warningIO,
	indent,
	maybeShowJSON,
	showFullJSON,
	showCustom,
	showHeader,
	showRaw,
	setupConsole,
	enableDebugOutput,
	disableDebugOutput,
	debugEnabled,
	commandProgressDisabled,
	outputMessage,
	implicitMessage,
) where

import Text.JSON
import System.Log.Logger
import System.Log.Formatter
import System.Log.Handler (setFormatter)
import System.Log.Handler.Simple

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

showStart :: String -> FilePath -> Annex ()
showStart command file = outputMessage (JSON.start command $ Just file) $
	command ++ " " ++ file ++ " "

showStart' :: String -> Key -> Maybe FilePath -> Annex ()
showStart' command key afile = showStart command $
	fromMaybe (key2file key) afile

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

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

showSideAction :: String -> Annex ()
showSideAction m = Annex.getState Annex.output >>= go
  where
	go st
		| sideActionBlock st == StartBlock = do
			p
			let st' = st { sideActionBlock = InBlock }
			Annex.changeState $ \s -> s { Annex.output = st' }
		| sideActionBlock st == InBlock = return ()
		| otherwise = p
	p = outputMessage q $ "(" ++ m ++ "...)\n"
			
showStoringStateAction :: Annex ()
showStoringStateAction = showSideAction "recording state in git"

{- Performs an action, supressing showSideAction messages. -}
doQuietSideAction :: Annex a -> Annex a
doQuietSideAction = doSideAction' InBlock

{- Performs an action, that may call showSideAction multiple times.
 - Only the first will be displayed. -}
doSideAction :: Annex a -> Annex a
doSideAction = doSideAction' StartBlock

doSideAction' :: SideActionBlock -> Annex a -> Annex a
doSideAction' b a = do
	o <- Annex.getState Annex.output
	set $ o { sideActionBlock = b }
	set o `after` a
  where
	set o = Annex.changeState $ \s -> s {  Annex.output = o }

{- Make way for subsequent output of a command. -}
showOutput :: Annex ()
showOutput = unlessM commandProgressDisabled $
	outputMessage q "\n"

showLongNote :: String -> Annex ()
showLongNote s = outputMessage (JSON.note s) ('\n' : indent s ++ "\n")

showEndOk :: Annex ()
showEndOk = showEndResult True

showEndFail :: Annex ()
showEndFail = showEndResult False

showEndResult :: Bool -> Annex ()
showEndResult ok = outputMessage (JSON.end ok) $ endResult ok ++ "\n"

endResult :: Bool -> String
endResult True = "ok"
endResult False = "failed"

toplevelWarning :: Bool -> String -> Annex ()
toplevelWarning makeway s = warning' makeway ("git-annex: " ++ s)

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

earlyWarning :: String -> Annex ()
earlyWarning = warning' False

warning' :: Bool -> String -> Annex ()
warning' makeway w = do
	when makeway $
		outputMessage q "\n"
	outputError (w ++ "\n")

{- Not concurrent output safe. -}
warningIO :: String -> IO ()
warningIO w = do
	putStr "\n"
	hFlush stdout
	hPutStrLn stderr w

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

{- Shows a JSON fragment only when in json mode. -}
maybeShowJSON :: JSON a => [(String, a)] -> Annex ()
maybeShowJSON v = withOutputType $ liftIO . go
  where
	go JSONOutput = JSON.add v
	go _ = return ()

{- Shows a complete JSON value, only when in json mode. -}
showFullJSON :: JSON a => [(String, a)] -> Annex Bool
showFullJSON v = withOutputType $ liftIO . go
  where
	go 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
	outputMessage (JSON.start command Nothing) ""
	r <- a
	outputMessage (JSON.end r) ""

showHeader :: String -> Annex ()
showHeader h = outputMessage q $ (h ++ ": ")

showRaw :: String -> Annex ()
showRaw s = outputMessage q (s ++ "\n")

setupConsole :: IO ()
setupConsole = do
	s <- setFormatter
		<$> streamHandler stderr DEBUG
		<*> pure preciseLogFormatter
	updateGlobalLogger rootLoggerName (setLevel NOTICE . setHandlers [s])
	setConsoleEncoding
	{- Force output to be line buffered. This is normally the case when
	 - it's connected to a terminal, but may not be when redirected to
	 - a file or a pipe. -}
	hSetBuffering stdout LineBuffering
	hSetBuffering stderr LineBuffering

{- Log formatter with precision into fractions of a second. -}
preciseLogFormatter :: LogFormatter a
preciseLogFormatter = tfLogFormatter "%F %X%Q" "[$time] $msg"

enableDebugOutput :: IO ()
enableDebugOutput = updateGlobalLogger rootLoggerName $ setLevel DEBUG

disableDebugOutput :: IO ()
disableDebugOutput = updateGlobalLogger rootLoggerName $ setLevel NOTICE

{- Checks if debugging is enabled. -}
debugEnabled :: IO Bool
debugEnabled = do
	l <- getRootLogger
	return $ getLevel l <= Just DEBUG

{- Should commands that normally output progress messages have that
 - output disabled? -}
commandProgressDisabled :: Annex Bool
commandProgressDisabled = withOutputType $ \t -> return $ case t of
	QuietOutput -> True
	JSONOutput -> True
	NormalOutput -> False
	ConcurrentOutput _ -> True

{- Use to show a message that is displayed implicitly, and so might be
 - disabled when running a certian command that needs more control over its
 - output. -}
implicitMessage :: Annex () -> Annex ()
implicitMessage = whenM (implicitMessages <$> Annex.getState Annex.output)