Function checkRefs

packages/plugins/apps/src/git-client/transport.ts:84–116

(
  url: string,
  auth: AuthRecipe = {},
  fetchImpl: typeof fetch = fetch,
  policy: GitUrlPolicy = {},
)

// The cheap "did it change" check: GET info/refs. Returns the ref advertisement.
export async function checkRefs(
  url: string,
  auth: AuthRecipe = {},
  fetchImpl: typeof fetch = fetch,
  policy: GitUrlPolicy = {},
): Promise<RefsResult> {
  const repo = normalizeRepoUrl(url);
  const infoUrl = `${repo}/info/refs?service=git-upload-pack`;
  const t0 = Date.now();
  const res = await fetchGit(
    infoUrl,
    {
      headers: {
        ...baseHeaders(auth),
        accept: "*/*",
      },
    },
    fetchImpl,
    policy,
  );
  const buf = new Uint8Array(await res.arrayBuffer());
  const wallMs = Date.now() - t0;
  if (!res.ok) {
    throw new Error(`info/refs ${res.status}: ${new TextDecoder().decode(buf.subarray(0, 200))}`);
  }
  const ct = res.headers.get("content-type") || "";
  if (!ct.includes("git-upload-pack-advertisement")) {
    // Some hosts (or a wrong URL) return HTML; treat as protocol failure.
    throw new Error(`unexpected content-type: ${ct}`);
  }
  const adv = parseInfoRefs(buf);
  return { adv, status: res.status, wallMs, bytes: buf.length };
}

export interface UploadPackOptions {
  auth?: AuthRecipe;