/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/** Possible versions that can be automatically migrated by `ng update`. */
export enum TargetVersion {
  V6 = 'version 6',
  V7 = 'version 7',
  V8 = 'version 8',
}

/**
 * Returns all versions that are supported by "ng update". The versions are determined
 * based on the "TargetVersion" enum.
 */
export function getAllVersionNames(): string[] {
  return Object.keys(TargetVersion)
      .filter(enumValue => typeof TargetVersion[enumValue] === 'number');
}