freeCodeCamp/probot/presolver/node_modules/@octokit/rest/lib/endpoint/extract-url-variable-names.js

module.exports = extractUrlVariableName

const flatten = require('lodash/flatten')

const urlVariableRegex = /\{[^}]+\}/g
function extractUrlVariableName (url) {
  const matches = url.match(urlVariableRegex)

  if (!matches) {
    return []
  }

  return flatten(matches.map(removeNonChars))
}

function removeNonChars (variableName) {
  return variableName.replace(/^\W+|\W+$/g, '').split(/,/)
}