summaryrefslogtreecommitdiff
path: root/Propellor/Message.hs
blob: a7ceff91c25eadc98d37b98cb0d55198aa7febc5 (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
module Propellor.Message where

import System.Console.ANSI
import System.IO

import Propellor.Types

-- | Shows a message while performing an action, with a colored status
-- display.
actionMessage :: ActionResult r => Desc -> IO r -> IO r
actionMessage desc a = do
	setTitle desc
	showdesc
	putStrLn "starting"
	hFlush stdout

	r <- a

	let (msg, intensity, color) = getActionResult r
	showdesc
	setSGR [SetColor Foreground intensity color]
	putStrLn msg
	setSGR []
	hFlush stdout

	return r
  where
	showdesc = putStr $ desc ++ " ... "

warningMessage :: String -> IO ()
warningMessage s = do
	setSGR [SetColor Foreground Vivid Red]
	putStrLn $ "** warning: " ++ s
	setSGR []
	hFlush stdout

errorMessage :: String -> IO a
errorMessage s = do
	warningMessage s
	error "Propellor failed!"