64 lines
1.7 KiB
Go
64 lines
1.7 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package cli
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"strings"
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"github.com/pkg/errors"
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)
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// Confirm shows the confirmation text and ask the user to answer (y/n)
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// default will be shown in uppercase and be selected if the user hits enter
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// returns true for yes, false for no
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func Confirm(prompt string, def bool) (bool, error) {
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reader := bufio.NewReader(os.Stdin)
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return confirm(reader, prompt, def)
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}
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func confirm(r io.Reader, prompt string, def bool) (bool, error) {
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options := " [Y/n]"
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if !def {
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options = " [y/N]"
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}
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reader := bufio.NewScanner(r)
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for {
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fmt.Print(prompt + options + ":")
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if !reader.Scan() {
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break
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}
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switch strings.ToLower(reader.Text()) {
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case "":
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return def, nil
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case "y", "yes", "yeah":
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return true, nil
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case "n", "no":
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return false, nil
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default:
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fmt.Println("Please write 'y' or 'n'")
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}
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}
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return false, errors.New("error reading user input")
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}
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