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59 lines
1.4 KiB
59 lines
1.4 KiB
const chalk = require('chalk');
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module.exports = (
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label,
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{
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defaultValue = false,
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abortSequences = new Set(['\u0003']),
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resolveChars = new Set(['\r']),
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yesChar = 'y',
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noChar = 'n',
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stdin = process.stdin,
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stdout = process.stdout,
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trailing = ''
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} = {}
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) => {
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return new Promise((resolve, reject) => {
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const isRaw = process.stdin.isRaw;
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stdin.setRawMode(true);
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stdin.resume();
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function restore() {
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stdout.write(trailing);
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stdin.setRawMode(isRaw);
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stdin.pause();
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stdin.removeListener('data', onData);
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}
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function onData(buffer) {
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const data = buffer.toString();
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if (abortSequences.has(data)) {
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restore();
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return reject(new Error('USER_ABORT'));
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}
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if (resolveChars.has(data[0])) {
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restore();
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resolve(defaultValue);
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} else if (data[0].toLowerCase() === yesChar) {
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restore();
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resolve(true);
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} else if (data[0].toLowerCase() === noChar) {
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restore();
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resolve(false);
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} else {
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// ignore extraneous input
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}
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}
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const defaultText = defaultValue === null
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? `[${yesChar}|${noChar}]`
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: defaultValue
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? `[${chalk.bold(yesChar.toUpperCase())}|${noChar}]`
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: `[${yesChar}|${chalk.bold(noChar.toUpperCase())}]`;
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stdout.write(`${chalk.gray('>')} ${label} ${chalk.gray(defaultText)} `);
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stdin.on('data', onData);
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});
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};
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