AppendFile: initial import

XMonad.Prompt.AppendFile is a new module which provides a prompt for
appending a single line of text to a file.  I use it for quickly
writing down ideas/todos/etc. to a special file when I can't be 
bothered to stop what I'm doing to write things down properly.

XMonad/Prompt/AppendFile.hs

@@ -0,0 +1,66 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonad.Prompt.AppendFile
+-- Copyright   :  (c) 2007 Brent Yorgey
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  <byorgey@gmail.com>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- A prompt for appending a single line of text to a file.  Useful for
+-- keeping a file of notes, things to remember for later, and so on---
+-- using a keybinding, you can write things down just about as quickly
+-- as you think of them, so it doesn't have to interrupt whatever else
+-- you're doing.
+--
+-- Who knows, it might be useful for other purposes as well!
+--
+-----------------------------------------------------------------------------
+
+module XMonad.Prompt.AppendFile (
+                                 -- * Usage
+                                 -- $usage
+
+                                 appendFilePrompt
+                                ) where
+
+import XMonad.Core
+import XMonad.Prompt
+
+import System.IO
+import Control.Exception
+
+-- $usage
+--
+-- You can use this module by importing it, along with
+-- "XMonad.Prompt", into your ~\/.xmonad\/xmonad.hs file:
+--
+-- > import XMonad.Prompt
+-- > import XMonad.Prompt.AppendFile
+--
+-- and adding an appropriate keybinding, for example:
+--
+-- >  , ((modMask x .|. controlMask, xK_n), appendFilePrompt defaultXPConfig "/home/me/NOTES")
+--
+-- For detailed instructions on editing your key bindings, see
+-- "XMonad.Doc.Extending#Editing_key_bindings".
+
+data AppendFile = AppendFile FilePath
+
+instance XPrompt AppendFile where
+    showXPrompt (AppendFile fn) = "Add to " ++ fn ++ ": "
+
+-- | Given an XPrompt configuration and a file path, prompt the user
+--   for a line of text, and append it to the given file.
+appendFilePrompt :: XPConfig -> FilePath -> X ()
+appendFilePrompt c fn = mkXPrompt (AppendFile fn)
+                                  c
+                                  (const (return []))
+                                  (doAppend fn)
+
+-- | Append a string to a file.
+doAppend :: FilePath -> String -> X ()
+doAppend fn s = io $ bracket (openFile fn AppendMode)
+                             hClose
+                             (flip hPutStrLn s)

xmonad-contrib.cabal

@@ -122,6 +122,7 @@ library
                         XMonad.Prompt.Window
                         XMonad.Prompt.Workspace
                         XMonad.Prompt.XMonad
+                        XMonad.Prompt.AppendFile
                         XMonad.Util.Anneal
                         XMonad.Util.CustomKeys
                         XMonad.Util.Dmenu