ui, cli: added proto/grpc versions to cli tool

Display what versions is using the GUI. It'll help to debug issues.

For next releases we may need to check incompatibilities between grpc
and protobuf (#790).

ui/bin/opensnitch-ui

@@ -22,9 +22,7 @@ if dist_path not in sys.path:
 
 from opensnitch.service import UIService
 from opensnitch.config import Config
-from opensnitch.utils import Themes
-from opensnitch.utils import Utils
-import opensnitch.version
+from opensnitch.utils import Themes, Utils, Versions
 import opensnitch.ui_pb2
 from opensnitch.ui_pb2_grpc import add_UIServicer_to_server
 
@@ -47,6 +45,11 @@ def load_translations():
     return translator
 
 if __name__ == '__main__':
+    gui_version, grpcversion, protoversion = Versions.get()
+    print("\t ~ OpenSnitch GUI -", gui_version, "~")
+    print("\tprotobuf:", protoversion, "-", "grpc:", grpcversion)
+    print("-" * 50, "\n")
+
     parser = argparse.ArgumentParser(description='OpenSnitch UI service.', formatter_class=argparse.RawTextHelpFormatter)
     parser.add_argument("--socket", dest="socket", help='''
 Path of the unix socket for the gRPC service (https://github.com/grpc/grpc/blob/master/doc/naming.md).

ui/opensnitch/utils.py

@@ -1,6 +1,6 @@
 
 from PyQt5 import QtCore, QtWidgets, QtGui
-from opensnitch.version import version
+from opensnitch.version import version as gui_version
 from opensnitch.database import Database
 from opensnitch.config import Config
 from threading import Thread, Event
@@ -250,7 +250,7 @@ def show(help_str):
 class Utils():
     @staticmethod
     def check_versions(daemon_version):
-        lMayor, lMinor, lPatch = version.split(".")
+        lMayor, lMinor, lPatch = gui_version.split(".")
         rMayor, rMinor, rPatch = daemon_version.split(".")
         return lMayor != rMayor or (lMayor == rMayor and lMinor != rMinor)
 
@@ -455,3 +455,15 @@ def new(icon_name):
                 pass
 
         return icon
+
+class Versions():
+    @staticmethod
+    def get():
+        try:
+            from google.protobuf import __version__ as proto_version
+            from grpc import __version__ as grpc_version
+
+            return gui_version, grpc_version, proto_version
+
+        except:
+            return "none", "none", "none"