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