showandtell/lib/argparser.js

A Javascript library providing debugger-like command-line interactivity for program state inspection and modification

'use strict'

/**
 * This code is copied, with slight modification, from
 * https://github.com/mccormicka/string-argv/blob/master/index.js
 *
 * Thanks to Github user mccormicka for their awesome work!
 */

function parseArgsStringToArgv (value) {
  // ([^\s'"]+(['"])([^\2]*?)\2) Match `text"quotes text"`
  // [^\s'"] or Match if not a space ' or "
  // (['"])([^\4]*?)\4 or Match "quoted text" without quotes
  // `\2` and `\4` are a backreference to the quote style (' or ") captured

  let myRegexp = /([^\s'"]+(['"])([^\2]*?)\2)|[^\s'"]+|(['"])([^\4]*?)\4/gi
  let myString = value
  let myArray = []
  let match = null
  do {
    // Each call to exec returns the next regex match as an array
    match = myRegexp.exec(myString)
    if (match !== null) {
      // Index 1 in the array is the captured group if it exists
      // Index 0 is the matched text, which we use if no captured group exists
      myArray.push(match[1] || match[5] || match[0])
    }
  } while (match !== null)

  return myArray
}

module.exports = {
  parse: parseArgsStringToArgv
}