JSON schemes dereference

generate.js

var $RefParser = require('json-schema-ref-parser')
var fs = require('fs')
var path = require('path')

var folderWithSchemas = path.join(__dirname, 'src/api/schemas/')
var dereferencesFolder = path.join(folderWithSchemas, 'dereferences/')

function DereferenceAsync (fileName) {
  var fileFrom = path.join(folderWithSchemas, fileName)
  var fileTo = path.join(dereferencesFolder, fileName)
  return $RefParser.bundle(fileFrom) // use bundle for cycle reference
    .then(function (schema) {
      return fs.writeFile(fileTo, JSON.stringify(schema, null, ' '), function (err) {
        if (err) {
          console.log(err)
          throw err
        }
        console.log('The file was saved! ' + fileName)
      })
    })
}

return fs.readdir(folderWithSchemas, (err, files) => {
  if (err) {
    console.log(err)
    throw err
  }
  var filesNames = files
    .filter(file => file.indexOf('.json') !== -1)
  var promises = filesNames.map(file => DereferenceAsync(file))
  return Promise.all(promises)
})