Function isArray

packages/config/src/index.ts:85–93

(
  arg: T | {}
)

// TODO: it might be possible to remove this if improvements to `Array.isArray` ever land
// related thread: github.com/microsoft/TypeScript/issues/36554
function isArray<T>(
  arg: T | {}
): arg is T extends readonly any[]
  ? unknown extends T
    ? never
    : readonly any[]
  : any[] {
  return Array.isArray(arg);
}

export let read = async (cwd: string, packages?: Packages) => {
  packages ??= await getPackages(cwd);