refractor: Add nm_support_version_cmp() utility function

When configuring certain property using nm provider, we need to
know if the running nm client version is not less than the earliest
supported version of the property, otherwise, the role need to fail
earlier and gracefully.

Signed-off-by: Wen Liang <[email protected]>

module_utils/network_lsr/nm/provider.py

@@ -65,6 +65,22 @@ def get_client_version(self):
         nm_client = client.get_client()
         return nm_client.get_version()
 
+    def nm_support_version_cmp(self, nm_support_version):
+        v = self.get_client_version().split(".")
+        major = int(v[0])
+        minor = int(v[1])
+        micro = int(v[2])
+        nm_support_v = nm_support_version.split(".")
+        nm_major = int(nm_support_v[0])
+        nm_minor = int(nm_support_v[1])
+        nm_micro = int(nm_support_v[2])
+        # emulate the behavior of `nm_client_get_version_info()` to encode NM daemon
+        # version as "(major << 16 | minor << 8 | micro)", but
+        # `nm_client_get_version_info()` is only supported to use since NM 1.42
+        return (major << 16 | minor << 8 | micro) >= (
+            nm_major << 16 | nm_minor << 8 | nm_micro
+        )
+
     def reload_configuration(self):
         timeout = 10
         nm_client = client.get_client()