Can force status bar to update early by sending a USR1 signal to the process

bumblebee-status

@@ -3,6 +3,7 @@
 import os
 import sys
 import logging
+import signal
 import bumblebee.theme
 import bumblebee.engine
 import bumblebee.config
@@ -18,6 +19,9 @@ except Exception:
 
 
 def main():
+    def sig_USR1_handler(signum,stack):
+        engine.write_output()
+        
     config = bumblebee.config.Config(sys.argv[1:])
 
     if config.debug():
@@ -45,6 +49,7 @@ def main():
             output=output,
             inp=inp,
         )
+        signal.signal(10,sig_USR1_handler)
         engine.run()
     except KeyboardInterrupt as error:
         inp.stop()

bumblebee/engine.py

@@ -255,22 +255,25 @@ class Engine(object):
         """Start the event loop"""
         self._output.start()
         while self.running():
-            self._output.begin()
+            self.write_output()
-            for module in self._modules:
-                self._current_module = module
-                module.update_wrapper(module.widgets())
-                if module.error == None:
-                    for widget in module.widgets():
-                        widget.link_module(module)
-                        self._output.draw(widget=widget, module=module, engine=self)
-                else:
-                    self._output.draw(widget=module.errorWidget(), module=module, engine=self)
-            self._output.flush()
-            self._output.end()
             if self.running():
                 self.input.wait(float(self._config.get("interval", 1)))
 
         self._output.stop()
         self.input.stop()
 
+    def write_output(self):
+        self._output.begin()
+        for module in self._modules:
+            self._current_module = module
+            module.update_wrapper(module.widgets())
+            if module.error == None:
+                for widget in module.widgets():
+                    widget.link_module(module)
+                    self._output.draw(widget=widget, module=module, engine=self)
+            else:
+                self._output.draw(widget=module.errorWidget(), module=module, engine=self)
+        self._output.flush()
+        self._output.end()
+
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