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e5bf5af296
* Extract some utilities into a separate package * Add utils dir to `files` in package.json * Do not create an empty `utils` dir on eject
43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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var rl = require('readline');
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// Convention: "no" should be the conservative choice.
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// If you mistype the answer, we'll always take it as a "no".
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// You can control the behavior on <Enter> with `isYesDefault`.
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function prompt(question, isYesDefault) {
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if (typeof isYesDefault !== 'boolean') {
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throw new Error('Provide explicit boolean isYesDefault as second argument.');
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}
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return new Promise(resolve => {
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var rlInterface = rl.createInterface({
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input: process.stdin,
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output: process.stdout,
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});
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var hint = isYesDefault === true ? '[Y/n]' : '[y/N]';
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var message = question + ' ' + hint + '\n';
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rlInterface.question(message, function(answer) {
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rlInterface.close();
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var useDefault = answer.trim().length === 0;
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if (useDefault) {
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return resolve(isYesDefault);
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}
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var isYes = answer.match(/^(yes|y)$/i);
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return resolve(isYes);
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});
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});
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};
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module.exports = prompt;
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