Add the pipe_cmd plugin

This plugins lets the user manipulate a poezio instance by writing commands
into a pipe, read by poezio which will execute them.

plugins/pipe_cmd.py

@@ -0,0 +1,42 @@
+"""
+
+This plugins allows commands to be sent to poezio via a named pipe.
+
+"""
+
+
+from plugin import BasePlugin
+import threading
+import os
+import stat
+import logging
+
+log = logging.getLogger(__name__)
+
+PIPENAME = "/tmp/poezio.fifo"
+
+class Plugin(BasePlugin):
+    def init(self):
+        self.stop = False
+
+        self.pipename = self.config.get("pipename", PIPENAME)
+
+        if not os.path.exists(self.pipename):
+            os.mkfifo(self.pipename)
+
+        if not stat.S_ISFIFO(os.stat(self.pipename).st_mode):
+            log.error("File %s is not a fifo file" % self.pipename)
+            raise TypeError
+
+        thread = threading.Thread(target=self.main_loop)
+        thread.start()
+
+    def main_loop(self):
+        while not self.stop:
+            fd = open(self.pipename, 'r')
+            line = fd.read().strip()
+            self.api.run_command(line)
+            fd.close()
+
+    def cleanup(self):
+        self.stop = True