Function extractFlagNames

test/parallel/test-cli-node-cli-manpage-options.mjs:66–88

* Function that given a string containing backtick enclosed cli flags * separated by `, ` returns the name of flags present in the string * e.g. `extractFlagNames('`-x`, `--print "script"`')` === `['x', 'print']` * @param {string} str target string * @returns {string[]} the name of the detected

(str)

 * @returns {string[]} the name of the detected flags
 */
function extractFlagNames(str) {
  const match = str.match(/`[^`]*?`/g);
  if (!match) {
    return [];
  }
  return match.map((flag) => {
    // Remove the backticks, and leading dash from the flag
    flag = flag.slice(2, -1);

    // If the flag contains parameters make sure to remove those
    const nameDelimiters = ['=', ' ', '['];
    const nameCutOffIdx = Math.min(...nameDelimiters.map((d) => {
      const idx = flag.indexOf(d);
      if (idx > 0) {
        return idx;
      }
      return flag.length;
    }));
    flag = flag.slice(0, nameCutOffIdx);

    return flag;
  });
}