Function buildValidPackfile

services/app-builder/src/git/git-clone-service.test.ts:45–67

(blobContent: string)

const zeroOid = '0'.repeat(40);

function buildValidPackfile(blobContent: string): { packBytes: Uint8Array; blobOid: string } {
  const content = Buffer.from(blobContent);
  const gitObjectHeader = Buffer.from(`blob ${content.length}\0`);
  const blobOid = createHash('sha1')
    .update(Buffer.concat([gitObjectHeader, content]))
    .digest('hex');

  const header = Buffer.alloc(12);
  header.write('PACK', 0);
  header.writeUInt32BE(2, 4);
  header.writeUInt32BE(1, 8);

  if (content.length > 15)
    throw new Error('buildValidPackfile: content too long for simple header');
  const objHeader = Buffer.from([(3 << 4) | content.length]);

  const deflated = deflateSync(content);
  const packBody = Buffer.concat([header, objHeader, deflated]);
  const checksum = createHash('sha1').update(packBody).digest();
  const packBytes = new Uint8Array(Buffer.concat([packBody, checksum]));

  return { packBytes, blobOid };
}

// ---------------------------------------------------------------------------
// Push helper: uses GitReceivePackService to populate a MemFS with real objects