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90 lines
2.0 KiB
90 lines
2.0 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package require
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import (
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"fmt"
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"github.com/spf13/cobra"
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)
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// NoArgs returns an error if any args are included.
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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 fmt.Errorf(
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"%q accepts no arguments\n\nUsage: %s",
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cmd.CommandPath(),
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cmd.UseLine(),
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)
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}
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return nil
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}
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// ExactArgs returns an error if there are not exactly n args.
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func ExactArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) != n {
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return fmt.Errorf(
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"%q requires %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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// MaximumNArgs returns an error if there are more than N args.
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func MaximumNArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) > n {
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return fmt.Errorf(
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"%q accepts at most %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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// MinimumNArgs returns an error if there is not at least N args.
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func MinimumNArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) < n {
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return fmt.Errorf(
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"%q requires at least %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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func pluralize(word string, n int) string {
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if n == 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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