Function buildFileTree

packages/client/src/utils/index.ts:84–235

(
  path: string | string[],
  {
    isDirectory,
    prebuilt,
    vercelOutputDir,
    rootDirectory,
    projectName,
    bulkRedirectsPath,
  }: Pick<
    VercelClientOptions,
    | 'isDirectory'
    | 'prebuilt'
    | 'vercelOutputDir'
    | 'rootDirectory'
    | 'projectName'
    | 'bulkRedirectsPath'
  >,
  debug: Debug
)

};

export async function buildFileTree(
  path: string | string[],
  {
    isDirectory,
    prebuilt,
    vercelOutputDir,
    rootDirectory,
    projectName,
    bulkRedirectsPath,
  }: Pick<
    VercelClientOptions,
    | 'isDirectory'
    | 'prebuilt'
    | 'vercelOutputDir'
    | 'rootDirectory'
    | 'projectName'
    | 'bulkRedirectsPath'
  >,
  debug: Debug
): Promise<{ fileList: string[]; ignoreList: string[] }> {
  const ignoreList: string[] = [];
  let fileList: string[];
  let { ig, ignores } = await getVercelIgnore(path, prebuilt, vercelOutputDir);

  debug(`Found ${ignores.length} rules in .vercelignore`);
  debug('Building file tree...');

  if (isDirectory && !Array.isArray(path)) {
    // Directory path
    const ignores = (absPath: string) => {
      const rel = relative(path, absPath);
      const ignored = ig.ignores(rel);
      if (ignored) {
        ignoreList.push(rel);
      }
      return ignored;
    };
    fileList = await readdir(path, [ignores]);

    // Check for special files that should be included even if ignored
    const refs = new Set<string>();

    if (prebuilt) {
      // Traverse over the `.vc-config.json` files and include
      // the files referenced by the "filePathMap" properties
      const vcConfigFilePaths = fileList.filter(
        file => basename(file) === '.vc-config.json'
      );
      await Promise.all(
        vcConfigFilePaths.map(async p => {
          const configJson = await readFile(p, 'utf8');
          const config = JSON.parse(configJson);
          if (!config.filePathMap) return;
          for (const v of Object.values(config.filePathMap) as string[]) {
            refs.add(join(path, v));
          }
        })
      );