Function findAsset

packages/cli/src/util/dev/server.ts:3369–3399

(
  match: BuildMatch,
  requestPath: string,
  vercelConfig: VercelConfig
)

}

function findAsset(
  match: BuildMatch,
  requestPath: string,
  vercelConfig: VercelConfig
): { asset: BuilderOutput; assetKey: string } | void {
  if (!match.buildOutput) {
    return;
  }
  let assetKey: string = requestPath.replace(/\/$/, '');
  let asset = match.buildOutput[requestPath];

  if (vercelConfig.trailingSlash && requestPath.endsWith('/')) {
    asset = match.buildOutput[requestPath.slice(0, -1)];
  }

  // In the case of an index path, fall back to iterating over the
  // builder outputs and doing an "is index" check until a match is found.
  if (!asset) {
    for (const [name, a] of Object.entries(match.buildOutput)) {
      if (isIndex(name) && dirnameWithoutDot(name) === assetKey) {
        asset = a;
        assetKey = name;
        break;
      }
    }
  }

  if (asset) {
    return { asset, assetKey };
  }
}

function dirnameWithoutDot(path: string): string {
  let dir = dirname(path);