angular-cli/packages/angular_devkit/build_angular/src/utils/normalize-source-maps.ts

/**
 * @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
 */

import { SourceMapClass, SourceMapUnion } from '../builders/browser/schema';

export function normalizeSourceMaps(sourceMap: SourceMapUnion): SourceMapClass {
  const scripts = typeof sourceMap === 'object' ? sourceMap.scripts : sourceMap;
  const styles = typeof sourceMap === 'object' ? sourceMap.styles : sourceMap;
  const hidden = (typeof sourceMap === 'object' && sourceMap.hidden) || false;
  const vendor = (typeof sourceMap === 'object' && sourceMap.vendor) || false;

  return {
    vendor,
    hidden,
    scripts,
    styles,
  };
}