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Node.js quick CLI arguments parser for key-value pair arguments
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/** | |
* Takes arguments in the form of --arg-name value and puts them into an object (argMap). | |
* Argument keys begin with double hyphens and additional hyphens are converted to camelCase. | |
* | |
* E.g. `node quick-argument-parser.js --test-arg1 'value1' --test-arg2 'value2'` will create argMap with the value: | |
* ``` | |
* { | |
* testArg1: 'value1', | |
* testArg2: 'value2' | |
* } | |
* ``` | |
* Node.js >= 4 | |
*/ | |
const args = process.argv.slice(2); | |
const argMap = {}; | |
if (args.length % 2) | |
throw new Error('Invalid number of arguments'); | |
for (let i = 0; i < args.length; i += 2) { | |
let key = args[i]; | |
if (!/^--([a-z]+-)*[a-z]+$/g.test(key)) | |
throw new Error('Invalid argument name'); | |
key = key | |
.replace(/^--/, '') | |
.replace(/-([a-z])/g, g => g[1].toUpperCase()); | |
argMap[key] = args[i + 1]; | |
} | |
// use argMap here |
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