summaryrefslogtreecommitdiffhomepage
path: root/src/Xmobar/Plugins/CommandReader.hs
diff options
context:
space:
mode:
authorjao <jao@gnu.org>2018-11-25 15:10:29 +0000
committerjao <jao@gnu.org>2018-11-25 15:10:29 +0000
commit77df1ac30fa7af5948f7ff64f5fee9aed64552b3 (patch)
tree647a4eb67ff1c293a5c530538ee88fc0093b577a /src/Xmobar/Plugins/CommandReader.hs
parente0d6da82de8d0d1cef98896164c6016b84e47068 (diff)
downloadxmobar-77df1ac30fa7af5948f7ff64f5fee9aed64552b3.tar.gz
xmobar-77df1ac30fa7af5948f7ff64f5fee9aed64552b3.tar.bz2
Back to app/src, since it seems they're the default convention for stack
Diffstat (limited to 'src/Xmobar/Plugins/CommandReader.hs')
-rw-r--r--src/Xmobar/Plugins/CommandReader.hs40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/Xmobar/Plugins/CommandReader.hs b/src/Xmobar/Plugins/CommandReader.hs
new file mode 100644
index 0000000..69c8e0c
--- /dev/null
+++ b/src/Xmobar/Plugins/CommandReader.hs
@@ -0,0 +1,40 @@
+-----------------------------------------------------------------------------
+-- |
+-- 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(CommandReader(..)) where
+
+import System.IO
+import Xmobar.Run.Commands
+import Xmobar.Utils (hGetLineSafe)
+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"