Retrieve custom environments

//native

type Vercel = {

  token: string;

};

/**

 * Retrieve custom environments

 * Retrieve custom environments for the project. Must not be named 'Production' or 'Preview'.

 */

export async function main(

  auth: Vercel,

  idOrName: string,

  gitBranch: string | undefined,

  teamId: string | undefined,

  slug: string | undefined,

) {

  const url = new URL(

    `https://api.vercel.com/v9/projects/${idOrName}/custom-environments`,

  );

  for (const [k, v] of [

    ["gitBranch", gitBranch],

    ["teamId", teamId],

    ["slug", slug],

  ]) {

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

      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();

}