Function extractFile

packages/tools/doctest/src/Source.ts:100–103

(file: string)

 * @since 4.0.0
 */
export const extractFile = (file: string): Promise<ReadonlyArray<Snippet>> =>
  readFile(file, "utf8").then((source) =>
    extract(source, file.endsWith(".md") || file.endsWith(".mdx") ? "markdown" : "jsdoc")
  )