move metarget version to single file VERSION

Author: brant-ruan

VERSION

@@ -0,0 +1 @@
+0.9.1

config.py

@@ -1,8 +1,6 @@
 import platform
 
 
-# metarget version
-VERSION = '0.3'
 # default CNI plugin
 DEFAULT_CNI_PLUGIN = 'flannel'
 # default kata runtime type

metarget

@@ -9,6 +9,7 @@ import os
 import sys
 
 import utils.system as system_func
+import utils.util as util
 import utils.color_print as color_print
 import cmds.gadget
 import cmds.cnv
@@ -47,7 +48,7 @@ def main():
         '-v',
         '--version',
         action='version',
-        version='metarget {ver}'.format(ver=config.VERSION))
+        version='metarget {ver}'.format(ver=util.get_metarget_version()))
 
     parser.set_defaults(func=lambda x: parser.print_help())
     # add subparsers

utils/util.py

@@ -0,0 +1,11 @@
+"""
+Trivial utilities
+"""
+
+
+def get_metarget_version():
+    try:
+        with open("VERSION", "r") as f:
+            return f.read().strip()
+    except FileNotFoundError:
+        return "unknown"