Function shouldServe

packages/cli/src/util/dev/server.ts:3272–3345

(
  match: BuildMatch,
  files: BuilderInputs,
  requestPath: string,
  devServer: DevServer,
  vercelConfig: VercelConfig,
  isFilesystem = false,
  hasMatched = false
)

}

async function shouldServe(
  match: BuildMatch,
  files: BuilderInputs,
  requestPath: string,
  devServer: DevServer,
  vercelConfig: VercelConfig,
  isFilesystem = false,
  hasMatched = false
): Promise<boolean> {
  const {
    src,
    config,
    builderWithPkg: { builder },
  } = match;

  // "middleware" file is not served as a regular asset,
  // instead it gets invoked as part of the routing logic.
  if (config?.middleware === true) {
    return false;
  }

  const cleanSrc = src.endsWith('.html') ? src.slice(0, -5) : src;
  const trimmedPath = requestPath.endsWith('/')
    ? requestPath.slice(0, -1)
    : requestPath;

  if (
    vercelConfig.cleanUrls &&
    vercelConfig.trailingSlash &&
    cleanSrc === trimmedPath
  ) {
    // Mimic fmeta-util and convert cleanUrls and trailingSlash
    return true;
  } else if (
    vercelConfig.cleanUrls &&
    !vercelConfig.trailingSlash &&
    cleanSrc === requestPath
  ) {
    // Mimic fmeta-util and convert cleanUrls
    return true;
  } else if (
    !vercelConfig.cleanUrls &&
    vercelConfig.trailingSlash &&
    src === trimmedPath
  ) {
    // Mimic fmeta-util and convert trailingSlash
    return true;
  } else if (typeof builder.shouldServe === 'function') {
    const shouldServe = await builder.shouldServe({
      entrypoint: src,
      files,
      config: config || {},
      requestPath,
      workPath: devServer.cwd,
      hasMatched,
    });
    if (shouldServe) {
      return true;