Function updateTsConfig

packages/schematics/angular/library/index.ts:45–56

(packageName: string, ...paths: string[])

];

function updateTsConfig(packageName: string, ...paths: string[]) {
  return (host: Tree) => {
    if (!host.exists('tsconfig.json')) {
      return host;
    }

    const file = new JSONFile(host, 'tsconfig.json');
    const jsonPath = ['compilerOptions', 'paths', packageName];
    const value = file.get(jsonPath);
    file.modify(jsonPath, Array.isArray(value) ? [...value, ...paths] : paths);
  };
}

function addTsProjectReference(...paths: string[]) {
  return (host: Tree) => {