failed parse ~ to $HOME when use = in flag assignment

[zhuwint]

I want to open file with filepath assigned in flag

This is my code

package main

import (
	"fmt"
	"os"

	"github.com/spf13/cobra"
)

var (
	file string

	rootCmd = &cobra.Command{
		Use:   "",
		Short: "",
		Long:  "",
		Run: func(cmd *cobra.Command, args []string) {
			if _, err := os.Stat(file); os.IsNotExist(err) {
				fmt.Println(err.Error())
			} else {
				fmt.Println(file)
			}
		},
	}
)

func init() {
	rootCmd.PersistentFlags().StringVarP(&file, "file", "f", "", "file path")
}

func main() {
	if err := rootCmd.Execute(); err != nil {
		fmt.Fprintln(os.Stderr, err)
	}
}

And the execute results are:

without =, successed parse ~ to $HOME

root@LAPTOP-VFP625S5# ./main --file ~/.kube/config
/root/.kube/config

with =, failed parse ~ to $HOME

root@LAPTOP-VFP625S5# ./main --file=~/.kube/config
stat ~/.kube/config: no such file or directory

Is that any ways can make it parse ~ successful with = ?