Add some options to surpass the output.

highlightxmpp.py

@@ -40,6 +40,7 @@
 #
 #   /set plugins.var.python.highlightxmpp.debug off
 #
+import os
 import subprocess
 
 import weechat
@@ -63,6 +64,9 @@ def send_xmpp(data, signal, message):
     command = weechat.config_get_plugin('command').split(' ')
     debug = weechat.config_get_plugin('debug') == 'on'
 
+    if os.path.exists(os.path.expanduser("~/.dont_send_xmpp")):
+        return weechat.WEECHAT_RC_OK
+
     if not jid:
         weechat.prnt('', 'You need to provide destination JID to use this '
                      'plugin.')
@@ -70,19 +74,26 @@ def send_xmpp(data, signal, message):
 
     command.append(jid)
 
-    pipe = subprocess.Popen(command, stdin=subprocess.PIPE,
-                            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    try:
+        pipe = subprocess.Popen(command, stdin=subprocess.PIPE,
+                                stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except FileNotFoundError as ex:
+        if debug:
+            weechat.prnt('', 'Command %s cannot be find.' % ex.filename)
+        return weechat.WEECHAT_RC_OK
+
     try:
         message = message.encode()
     except UnicodeDecodeError:
         pass
 
-    _, stderr = pipe.communicate(input=message)
+    # don't throw your output on the screen.
+    res = pipe.communicate(input=message)
     if pipe.returncode != 0 and debug:
         try:
-            stderr = stderr.decode()
+            stderr = res[1].decode()
         except UnicodeDecodeError:
-            pass
+            stderr = res[1]
         weechat.prnt('', 'Error sending message to %s:\n%s' % (jid, stderr))
     return weechat.WEECHAT_RC_OK