diff options
Diffstat (limited to 'node_modules/@pkgjs/parseargs/examples/no-repeated-options.js')
-rw-r--r-- | node_modules/@pkgjs/parseargs/examples/no-repeated-options.js | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/node_modules/@pkgjs/parseargs/examples/no-repeated-options.js b/node_modules/@pkgjs/parseargs/examples/no-repeated-options.js new file mode 100644 index 0000000..0c32468 --- /dev/null +++ b/node_modules/@pkgjs/parseargs/examples/no-repeated-options.js @@ -0,0 +1,31 @@ +'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 |