List CODEOWNERS errors

type Github = {

  token: string;

};

/**

 * List CODEOWNERS errors

 * List any syntax errors that are detected in the CODEOWNERS

file.

For more information about the correct CODEOWNERS syntax,

see "[About code owners](https://docs.github.com/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners)."

 */

export async function main(

  auth: Github,

  owner: string,

  repo: string,

  ref: string | undefined

) {

  const url = new URL(

    `https://api.github.com/repos/${owner}/${repo}/codeowners/errors`

  );

  for (const [k, v] of [["ref", ref]]) {

    if (v !== undefined && v !== "") {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Bearer " + auth.token,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}