Xmobar.Run.Command -> Xmobar.Plugins.Command

1 files changed, 54 insertions, 0 deletions

diff --git a/src/Xmobar/Plugins/Command.hs b/src/Xmobar/Plugins/Command.hs
new file mode 100644
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+++ b/src/Xmobar/Plugins/Command.hs
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+------------------------------------------------------------------------------
+-- |
+-- Module: Xmobar.Plugins.Command
+-- Copyright: (c) 2018, 2022 Jose Antonio Ortega Ruiz
+-- License: BSD3-style (see LICENSE)
+--
+-- Maintainer: jao@gnu.org
+-- Stability: unstable
+-- Portability: portable
+-- Created: Sun Dec 02, 2018 05:29
+--
+--
+-- The basic Command plugin
+--
+------------------------------------------------------------------------------
+
+
+module Xmobar.Plugins.Command where
+
+import Control.Exception (handle, SomeException(..))
+import System.Process
+import System.Exit
+import System.IO (hClose, hGetLine)
+
+import Xmobar.Run.Exec
+
+data Command = Com Program Args Alias Rate
+             | ComX Program Args String Alias Rate
+               deriving (Show,Read,Eq)
+
+type Args    = [String]
+type Program = String
+type Alias   = String
+type Rate    = Int
+
+instance Exec Command where
+    alias (ComX p _ _ a _) =
+      if p /= "" then (if a == "" then p else a) else ""
+    alias (Com p a al r) = alias (ComX p a "" al r)
+    start (Com p as al r) cb =
+      start (ComX p as ("Could not execute command " ++ p) al r) cb
+    start (ComX prog args msg _ r) cb = if r > 0 then go else exec
+        where go = doEveryTenthSeconds r exec
+              exec = do
+                (i,o,e,p) <- runInteractiveProcess prog args Nothing Nothing
+                exit <- waitForProcess p
+                let closeHandles = hClose o >> hClose i >> hClose e
+                    getL = handle (\(SomeException _) -> return "")
+                                  (hGetLine o)
+                case exit of
+                  ExitSuccess -> do str <- getL
+                                    closeHandles
+                                    cb str
+                  _ -> closeHandles >> cb msg