package cli import ( "strings" "github.com/pkg/errors" "github.com/spf13/cobra" ) // NoArgs validates args and returns an error if there are any args func NoArgs(cmd *cobra.Command, args []string) error { if len(args) == 0 { return nil } if cmd.HasSubCommands() { return errors.Errorf("\n" + strings.TrimRight(cmd.UsageString(), "\n")) } return errors.Errorf( "\"%s\" accepts no argument(s).\nSee '%s --help'.\n\nUsage: %s\n\n%s", cmd.CommandPath(), cmd.CommandPath(), cmd.UseLine(), cmd.Short, ) } // RequiresMinArgs returns an error if there is not at least min args func RequiresMinArgs(min int) cobra.PositionalArgs { return func(cmd *cobra.Command, args []string) error { if len(args) >= min { return nil } return errors.Errorf( "\"%s\" requires at least %d argument(s).\nSee '%s --help'.\n\nUsage: %s\n\n%s", cmd.CommandPath(), min, cmd.CommandPath(), cmd.UseLine(), cmd.Short, ) } } // RequiresMaxArgs returns an error if there is not at most max args func RequiresMaxArgs(max int) cobra.PositionalArgs { return func(cmd *cobra.Command, args []string) error { if len(args) <= max { return nil } return errors.Errorf( "\"%s\" requires at most %d argument(s).\nSee '%s --help'.\n\nUsage: %s\n\n%s", cmd.CommandPath(), max, cmd.CommandPath(), cmd.UseLine(), cmd.Short, ) } } // RequiresRangeArgs returns an error if there is not at least min args and at most max args func RequiresRangeArgs(min int, max int) cobra.PositionalArgs { return func(cmd *cobra.Command, args []string) error { if len(args) >= min && len(args) <= max { return nil } return errors.Errorf( "\"%s\" requires at least %d and at most %d argument(s).\nSee '%s --help'.\n\nUsage: %s\n\n%s", cmd.CommandPath(), min, max, cmd.CommandPath(), cmd.UseLine(), cmd.Short, ) } } // ExactArgs returns an error if there is not the exact number of args func ExactArgs(number int) cobra.PositionalArgs { return func(cmd *cobra.Command, args []string) error { if len(args) == number { return nil } return errors.Errorf( "\"%s\" requires exactly %d argument(s).\nSee '%s --help'.\n\nUsage: %s\n\n%s", cmd.CommandPath(), number, cmd.CommandPath(), cmd.UseLine(), cmd.Short, ) } }