func (cmd *UpdateBuildpack) GetRequirements(requirementsFactory requirements.Factory, c *cli.Context) (reqs []requirements.Requirement, err error) {
if len(c.Args()) != 1 {
cmd.ui.FailWithUsage(c)
}
loginReq := requirementsFactory.NewLoginRequirement()
cmd.buildpackReq = requirementsFactory.NewBuildpackRequirement(c.Args()[0])
reqs = []requirements.Requirement{
loginReq,
cmd.buildpackReq,
}
return
}