add inotify

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/src/plugins/inotify.py b/src/plugins/inotify.py
new file mode 100644
index 0000000..5cf2d73
--- /dev/null
+++ b/src/plugins/inotify.py
@@ -0,0 +1,59 @@
+# -*- python -*-
+'''
+xpybar – xmobar replacement written in python
+Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+'''
+
+import os
+
+from util import *
+
+from plugins.linereader import LineReader
+
+
+
+class Inotify:
+    '''
+    File access monitor
+    '''
+    
+    def __init__(self, callback, *arguments, events = None):
+        '''
+        Constructor
+        
+        @param  callback:(str)→void  Function that will be called everytime a line is read from
+                                     `inotifywait`'s standard output, the parameter will be that line,
+                                     note that this will not be asynchronously, you may want to specify
+                                     something like `lambda : async(fun)` for that, and use semaphores
+                                     in `fun`.
+        @param  arguments:*str       The files and directories you want to watch and any addition
+                                     argument you want to pass to `inotifywait`
+        @param  event:itr<str>?      Event you want reported, see "EVENTS" under `inotifywait`'s man page
+        '''
+        command = ['inotifywait', '-m']
+        if events is not None:
+            if isinstance(events, str):
+                events = [events]
+            for event in events:
+                command.append('-e')
+                command.append(event)
+        command += list(arguments)
+        def start():
+            with LineReader(spawn(*command)) as reader:
+                while True:
+                    callback(reader.next())
+        async(start)
+