New builtin: refresh that doesn't shutdown modules but refresh kernel code

module_states_file.py

@@ -40,6 +40,8 @@ def parse_file(filename):
   try:
     parser.parse(open(filename, "r"))
     return mod.root
+  except IOError:
+    return module_state.ModuleState("nemubotstate")
   except:
     if mod.root is None:
       return module_state.ModuleState("nemubotstate")

nemubot.py

@@ -27,7 +27,12 @@ if len(sys.argv) >= 2:
 print ("Nemubot ready, my PID is %i!" % (os.getpid()))
 while prompt.launch(servers):
     try:
+      if prompt.MODS is None:
         imp.reload(prompt)
+      else:
+        mods = prompt.MODS
+        imp.reload(prompt)
+        prompt.MODS = mods
     except:
         print ("Unable to reload the prompt due to errors. Fix them before trying to reload the prompt.")
         exc_type, exc_value, exc_traceback = sys.exc_info()

prompt.py

@@ -47,6 +47,10 @@ def getPS1():
 
 def launch(servers):
   """Launch the prompt"""
+  global MODS
+  if MODS is None:
+    MODS = list()
+
   #Load messages module
   server.message.load(datas_path + "general.xml")
 
@@ -77,6 +81,9 @@ def launch(servers):
       except:
         exc_type, exc_value, exc_traceback = sys.exc_info()
         sys.stdout.write (traceback.format_exception_only(exc_type, exc_value)[0])
+  #Don't shutdown at refresh
+  if ret == "refresh":
+    return True
   #Save and shutdown modules
   for m in MODS:
     m.save()
@@ -84,6 +91,7 @@ def launch(servers):
       m.close()
     except AttributeError:
       pass
+  MODS = None
   return ret == "reset"
 
 
@@ -438,7 +446,9 @@ def zap(cmds, servers):
 
 def end(cmds, servers):
   """Quit the prompt for reload or exit"""
-  if cmds[0] == "reset":
+  if cmds[0] == "refresh":
+    return "refresh"
+  elif cmds[0] == "reset":
     return "reset"
   else:
     for srv in servers.keys():
@@ -450,6 +460,7 @@ CAPS = {
   'quit': end, #Disconnect all server and quit
   'exit': end, #Alias for quit
   'reset': end, #Reload the prompt
+  'refresh': end, #Reload the prompt but save modules
   'load': load, #Load a servers or module configuration file
   'hotswap': hotswap, #Reload the server class without closing the socket
   'close': close, #Disconnect and remove a server from the list