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authorPavan Rikhi <pavan.rikhi@gmail.com>2018-03-17 22:48:24 -0400
committerjao <jao@gnu.org>2018-11-21 21:41:35 +0000
commit4d1402a1a7d87767267d48a77998e4fb13395b31 (patch)
tree17fd6160dc1fa9c8a0676a94bcf8d19b551c655c /src/Xmobar/Plugins/CommandReader.hs
parent9e2a5c7daddf683d4be7c318aefed3da3ea7a89a (diff)
downloadxmobar-4d1402a1a7d87767267d48a77998e4fb13395b31.tar.gz
xmobar-4d1402a1a7d87767267d48a77998e4fb13395b31.tar.bz2
Split Modules into Library & Executable Structure
Move the Main module to a new `app` directory. All other modules have been nested under the `Xmobar` name. Lots of module headers & imports were updated.
Diffstat (limited to 'src/Xmobar/Plugins/CommandReader.hs')
-rw-r--r--src/Xmobar/Plugins/CommandReader.hs39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/Xmobar/Plugins/CommandReader.hs b/src/Xmobar/Plugins/CommandReader.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.CommandReader
+-- Copyright : (c) John Goerzen
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A plugin for reading from external commands
+-- note: stderr is lost here
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.Plugins.CommandReader where
+
+import System.IO
+import Xmobar.Plugins
+import System.Process(runInteractiveCommand, getProcessExitCode)
+
+data CommandReader = CommandReader String String
+ deriving (Read, Show)
+
+instance Exec CommandReader where
+ alias (CommandReader _ a) = a
+ start (CommandReader p _) cb = do
+ (hstdin, hstdout, hstderr, ph) <- runInteractiveCommand p
+ hClose hstdin
+ hClose hstderr
+ hSetBinaryMode hstdout False
+ hSetBuffering hstdout LineBuffering
+ forever ph (hGetLineSafe hstdout >>= cb)
+ where forever ph a =
+ do a
+ ec <- getProcessExitCode ph
+ case ec of
+ Nothing -> forever ph a
+ Just _ -> cb "EXITED"