DockerCLI/cli/required.go

113 lines
2.8 KiB
Go

package cli
import (
"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(
"%[1]s: unknown command: %[2]s %[3]s\n\nUsage: %[4]s\n\nRun '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
args[0],
cmd.UseLine(),
)
}
return errors.Errorf(
"%[1]s: '%[2]s' accepts no arguments\n\nUsage: %[3]s\n\nRun '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
cmd.UseLine(),
)
}
// RequiresMinArgs returns an error if there is not at least min args
func RequiresMinArgs(minArgs int) cobra.PositionalArgs {
return func(cmd *cobra.Command, args []string) error {
if len(args) >= minArgs {
return nil
}
return errors.Errorf(
"%[1]s: '%[2]s' requires at least %[3]d %[4]s\n\nUsage: %[5]s\n\nSee '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
minArgs,
pluralize("argument", minArgs),
cmd.UseLine(),
)
}
}
// RequiresMaxArgs returns an error if there is not at most max args
func RequiresMaxArgs(maxArgs int) cobra.PositionalArgs {
return func(cmd *cobra.Command, args []string) error {
if len(args) <= maxArgs {
return nil
}
return errors.Errorf(
"%[1]s: '%[2]s' requires at most %[3]d %[4]s\n\nUsage: %[5]s\n\nSRun '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
maxArgs,
pluralize("argument", maxArgs),
cmd.UseLine(),
)
}
}
// RequiresRangeArgs returns an error if there is not at least min args and at most max args
func RequiresRangeArgs(minArgs int, maxArgs int) cobra.PositionalArgs {
return func(cmd *cobra.Command, args []string) error {
if len(args) >= minArgs && len(args) <= maxArgs {
return nil
}
return errors.Errorf(
"%[1]s: '%[2]s' requires at least %[3]d and at most %[4]d %[5]s\n\nUsage: %[6]s\n\nRun '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
minArgs,
maxArgs,
pluralize("argument", maxArgs),
cmd.UseLine(),
)
}
}
// 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(
"%[1]s: '%[2]s' requires %[3]d %[4]s\n\nUsage: %[5]s\n\nRun '%[2]s --help' for more information",
binName(cmd),
cmd.CommandPath(),
number,
pluralize("argument", number),
cmd.UseLine(),
)
}
}
// binName returns the name of the binary / root command (usually 'docker').
func binName(cmd *cobra.Command) string {
return cmd.Root().Name()
}
//nolint:unparam
func pluralize(word string, number int) string {
if number == 1 {
return word
}
return word + "s"
}