Manually read verbosity before kubectl command construction

kubectl command construction is slowly getting more functionality which
sometimes requires to log certain actions. Currently we parse the
verbosity only when actually running the command, so all of construction
code is not able to use -v=5. This commit adds the manual parsing and
loglevel setting berore we even start creating the kubectl command.

Signed-off-by: Maciej Szulik <soltysh@gmail.com>

Kubernetes-commit: 69682b75e508462e01f865a156f2171233b653d1

pkg/cmd/cmd.go

@@ -583,3 +583,29 @@ func registerCompletionFuncForGlobalFlags(cmd *cobra.Command, f cmdutil.Factory)
 			return utilcomp.ListUsersInConfig(toComplete), cobra.ShellCompDirectiveNoFileComp
 		}))
 }
+
+// GetLogVerbosity parses the provided command-line arguments to determine
+// the verbosity level for logging. Returns string representing the verbosity
+// level, or 0 if no verbosity flag is specified.
+func GetLogVerbosity(args []string) string {
+	for i, arg := range args {
+		if arg == "--" {
+			// flags after "--" does not represent any flag of
+			// the command. We should short cut the iteration in here.
+			break
+		}
+
+		if arg == "--v" || arg == "-v" {
+			if i+1 < len(args) {
+				return args[i+1]
+			}
+		} else if strings.Contains(arg, "--v=") || strings.Contains(arg, "-v=") {
+			parg := strings.Split(arg, "=")
+			if len(parg) > 1 && parg[1] != "" {
+				return parg[1]
+			}
+		}
+	}
+
+	return "0"
+}