type Bitbucket = {

  username: string;

  password: string;

};

/**

 * Get the patch for a pull request

 * Redirects to the repository patch

with the revspec that corresponds to pull request.

 */

export async function main(

  auth: Bitbucket,

  pull_request_id: string,

  repo_slug: string,

  workspace: string

) {

  const url = new URL(

    `https://api.bitbucket.org/2.0/repositories/${workspace}/${repo_slug}/pullrequests/${pull_request_id}/patch`

  );

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Basic " + btoa(`${auth.username}:${auth.password}`),

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

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

  }

  return await response.text();

}