Can command line flags in Go be set to mandatory?

Question

Is there a way how to set that certain flags are mandatory, or do I have to check for their presence on my own?

Answer 1

I like github.com/jessevdk/go-flags package to use in CLI. It provides a required attribute, to set a mandatory flag:

var opts struct {
...
    // Example of a required flag
    Name string `short:"n" long:"name" description:"A name" required:"true"`
...
}