137 lines
3.7 KiB
Haskell
137 lines
3.7 KiB
Haskell
--------------------------------------------------------------------------------
|
|
-- | Functions for formatting and spawning shell commands
|
|
|
|
module XMonad.Internal.Shell
|
|
( MaybeExe(..)
|
|
, Dependency(..)
|
|
, MaybeX
|
|
, IOMaybeX
|
|
, runIfInstalled
|
|
, warnMissing
|
|
, whenInstalled
|
|
, spawnIfInstalled
|
|
, spawnCmdIfInstalled
|
|
, noCheck
|
|
, fmtCmd
|
|
, spawnCmd
|
|
, spawnSound
|
|
, playSound
|
|
, doubleQuote
|
|
, singleQuote
|
|
, skip
|
|
, (#!&&)
|
|
, (#!||)
|
|
, (#!>>)
|
|
) where
|
|
|
|
import Control.Monad (filterM)
|
|
import Control.Monad.IO.Class
|
|
|
|
import Data.Maybe (isJust)
|
|
|
|
import System.Directory (findExecutable)
|
|
import System.FilePath.Posix
|
|
|
|
import XMonad.Core (X, getXMonadDir)
|
|
import XMonad.Internal.Process
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | Gracefully handling missing binaries
|
|
|
|
data Dependency = Required String | Optional String deriving (Eq, Show)
|
|
|
|
data MaybeExe m = Installed (m ()) [String] | Missing [Dependency] | Ignore
|
|
|
|
type MaybeX = MaybeExe X
|
|
|
|
type IOMaybeX = IO MaybeX
|
|
|
|
warnMissing :: Dependency -> IO ()
|
|
warnMissing d = case d of
|
|
Required d' -> warn "required" d'
|
|
Optional d' -> warn "optional" d'
|
|
where
|
|
warn t n = putStrLn $ "WARNING: " ++ t ++ " executable not found: " ++ n
|
|
|
|
exeInstalled :: String -> IO Bool
|
|
exeInstalled x = isJust <$> findExecutable x
|
|
|
|
depInstalled :: Dependency -> IO Bool
|
|
depInstalled (Required d) = exeInstalled d
|
|
depInstalled (Optional d) = exeInstalled d
|
|
|
|
filterMissing :: [Dependency] -> IO [Dependency]
|
|
filterMissing = filterM (fmap not . depInstalled)
|
|
|
|
runIfInstalled :: MonadIO m => [Dependency] -> m () -> IO (MaybeExe m)
|
|
runIfInstalled ds x = do
|
|
missing <- filterMissing ds
|
|
return $ if null [m | Required m <- missing]
|
|
then Installed x [m | Optional m <- missing]
|
|
else Missing missing
|
|
|
|
spawnIfInstalled :: MonadIO m => String -> IO (MaybeExe m)
|
|
spawnIfInstalled exe = runIfInstalled [Required exe] $ spawn exe
|
|
|
|
spawnCmdIfInstalled :: MonadIO m => String -> [String] -> IO (MaybeExe m)
|
|
spawnCmdIfInstalled exe args = runIfInstalled [Required exe] $ spawnCmd exe args
|
|
|
|
whenInstalled :: Monad m => MaybeExe m -> m ()
|
|
whenInstalled (Installed x _) = x
|
|
whenInstalled _ = return ()
|
|
|
|
skip :: Monad m => m ()
|
|
skip = return ()
|
|
|
|
noCheck :: Monad m => a () -> m (MaybeExe a)
|
|
noCheck = return . flip Installed []
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | Opening subshell
|
|
|
|
spawnCmd :: MonadIO m => String -> [String] -> m ()
|
|
spawnCmd cmd args = spawn $ fmtCmd cmd args
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | Playing sound
|
|
|
|
soundDir :: FilePath
|
|
soundDir = "sound"
|
|
|
|
spawnSound :: MonadIO m => FilePath -> m () -> m () -> IO (MaybeExe m)
|
|
spawnSound file pre post = runIfInstalled [Required "paplay"]
|
|
$ pre >> playSound file >> post
|
|
|
|
playSound :: MonadIO m => FilePath -> m ()
|
|
playSound file = do
|
|
path <- (</> soundDir </> file) <$> getXMonadDir
|
|
-- paplay seems to have less latency than aplay
|
|
spawnCmd "paplay" [path]
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | Formatting commands
|
|
|
|
fmtCmd :: String -> [String] -> String
|
|
fmtCmd cmd args = unwords $ cmd : args
|
|
|
|
(#!&&) :: String -> String -> String
|
|
cmdA #!&& cmdB = cmdA ++ " && " ++ cmdB
|
|
|
|
infixr 0 #!&&
|
|
|
|
(#!||) :: String -> String -> String
|
|
cmdA #!|| cmdB = cmdA ++ " || " ++ cmdB
|
|
|
|
infixr 0 #!||
|
|
|
|
(#!>>) :: String -> String -> String
|
|
cmdA #!>> cmdB = cmdA ++ "; " ++ cmdB
|
|
|
|
infixr 0 #!>>
|
|
|
|
doubleQuote :: String -> String
|
|
doubleQuote s = "\"" ++ s ++ "\""
|
|
|
|
singleQuote :: String -> String
|
|
singleQuote s = "'" ++ s ++ "'"
|