no-repeated-options.js•897 B
'use strict';
// This is an example of using tokens to add a custom behaviour.
//
// Throw an error if an option is used more than once.
// 1. const { parseArgs } = require('node:util'); // from node
// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
const { parseArgs } = require('..'); // in repo
const options = {
ding: { type: 'boolean', short: 'd' },
beep: { type: 'boolean', short: 'b' }
};
const { values, tokens } = parseArgs({ options, tokens: true });
const seenBefore = new Set();
tokens.forEach((token) => {
if (token.kind !== 'option') return;
if (seenBefore.has(token.name)) {
throw new Error(`option '${token.name}' used multiple times`);
}
seenBefore.add(token.name);
});
console.log(values);
// Try the following:
// node no-repeated-options --ding --beep
// node no-repeated-options --beep -b
// node no-repeated-options -ddd