Added CommandReader

darcs-hash:20080916052025-c2a52-b56fb3901980591a17383a9267166cc3c9d34185.gz

2 files changed, 33 insertions, 1 deletions

diff --git a/Config.hs b/Config.hs
index f55f35d..8f6b687 100644
--- a/Config.hs
+++ b/Config.hs
@@ -28,6 +28,7 @@ import {-# SOURCE #-} Runnable
 import Plugins.Monitors
 import Plugins.Date
 import Plugins.PipeReader
+import Plugins.CommandReader
 import Plugins.StdinReader
 
 #ifdef INOTIFY
@@ -86,7 +87,7 @@ infixr :*:
 -- the 'Runnable.Runnable' Read instance. To install a plugin just add
 -- the plugin's type to the list of types (separated by ':*:') appearing in
 -- this function's type signature.
-runnableTypes :: Command :*: Monitors :*: Date :*: PipeReader :*: StdinReader :*:
+runnableTypes :: Command :*: Monitors :*: Date :*: PipeReader :*: CommandReader :*: StdinReader :*:
 #ifdef INOTIFY
                  Mail :*:
 #endif
diff --git a/Plugins/CommandReader.hs b/Plugins/CommandReader.hs
new file mode 100644
index 0000000..b084aba
--- /dev/null
+++ b/Plugins/CommandReader.hs
@@ -0,0 +1,31 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  Plugins.CommandReader
+-- Copyright   :  (c) John Goerzen
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- A plugin for reading from external commands
+-- note: stderr is lost here
+--
+-----------------------------------------------------------------------------
+
+module Plugins.CommandReader where
+
+import System.IO
+import Plugins
+
+data CommandReader = CommandReader String String
+    deriving (Read, Show)
+
+instance Exec CommandReader where
+    alias (CommandReader _ a)    = a
+    start (CommandReader p _) cb = do
+        (hstdin, hstdout, hstderr) <- runInteractiveCommand p
+        hClose hstdin
+        hClose hstderr
+        forever (hGetLineSafe hstdout >>= cb)
+        where forever a = a >> forever a