how to set `nil` as default value in `BoolVar`?

[OpenWaygate]

I want to keep a variable as nil except explicitly set, but only true or false is allowed.

myCmd.Flags().BoolVar(&isMine, "isMine", nil, "")

[marckhouzam]

In Go a bool cannot be nil but only true or false. If you’re thinking of the pointer you’re passing in, that cannot be nil as it must represent a location where cobra can write true or false