108 lines
2.4 KiB
Go
108 lines
2.4 KiB
Go
package cli
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import (
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"strings"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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// NoArgs validates args and returns an error if there are any args
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func NoArgs(cmd *cobra.Command, args []string) error {
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if len(args) == 0 {
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return nil
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}
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if cmd.HasSubCommands() {
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return errors.Errorf("\n" + strings.TrimRight(cmd.UsageString(), "\n"))
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}
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return errors.Errorf(
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"%q accepts no arguments.\nSee '%s --help'.\n\nUsage: %s\n\n%s",
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cmd.CommandPath(),
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cmd.CommandPath(),
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cmd.UseLine(),
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cmd.Short,
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)
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}
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// RequiresMinArgs returns an error if there is not at least min args
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func RequiresMinArgs(min int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) >= min {
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return nil
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}
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return errors.Errorf(
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"%q requires at least %d %s.\nSee '%s --help'.\n\nUsage: %s\n\n%s",
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cmd.CommandPath(),
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min,
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pluralize("argument", min),
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cmd.CommandPath(),
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cmd.UseLine(),
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cmd.Short,
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)
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}
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}
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// RequiresMaxArgs returns an error if there is not at most max args
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func RequiresMaxArgs(max int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) <= max {
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return nil
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}
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return errors.Errorf(
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"%q requires at most %d %s.\nSee '%s --help'.\n\nUsage: %s\n\n%s",
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cmd.CommandPath(),
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max,
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pluralize("argument", max),
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cmd.CommandPath(),
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cmd.UseLine(),
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cmd.Short,
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)
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}
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}
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// RequiresRangeArgs returns an error if there is not at least min args and at most max args
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func RequiresRangeArgs(min int, max int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) >= min && len(args) <= max {
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return nil
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}
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return errors.Errorf(
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"%q requires at least %d and at most %d %s.\nSee '%s --help'.\n\nUsage: %s\n\n%s",
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cmd.CommandPath(),
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min,
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max,
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pluralize("argument", max),
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cmd.CommandPath(),
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cmd.UseLine(),
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cmd.Short,
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)
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}
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}
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// ExactArgs returns an error if there is not the exact number of args
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func ExactArgs(number int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) == number {
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return nil
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}
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return errors.Errorf(
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"%q requires exactly %d %s.\nSee '%s --help'.\n\nUsage: %s\n\n%s",
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cmd.CommandPath(),
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number,
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pluralize("argument", number),
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cmd.CommandPath(),
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cmd.UseLine(),
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cmd.Short,
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)
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}
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}
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func pluralize(word string, number int) string {
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if number == 1 {
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return word
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}
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return word + "s"
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}
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