Loop recursive inside a folder using Emscripten File API

Question

How to loop files inside a folder using Emscripten?

E.g., I've created data a folder '/res' (FS.mkdir('/res')) and some data temp files and subfolders inside the '/res'.

How can I loop files and folders inside?

I've just found FS.isDir(). but no more. What is the proper way to extract the data (file names):

/res/file1.txt
/res/file2.txt
/res/file2.txt
/res/dir/file01.txt
/res/dir/file02.txt

etc.

Answer 1

FS.readdir lists all names (files and folders) of a directory, but not recursively. You can use FS.lookupPath, FS.isFile and FS.isDir to recursively crawl the filesystem.

function fsReadAllFiles(folder) {
  const files = [];

  function impl(curFolder) {
    for (const name of FS.readdir(curFolder)) {
      if (name === '.' || name === '..') continue;

      const path = `${curFolder}/${name}`;
      const { mode, timestamp } = FS.lookupPath(path).node;
      if (FS.isFile(mode)) {
        files.push({path, timestamp});
      } else if (FS.isDir(mode)) {
        impl(path);
      }
    }
  }

  impl(folder);
  return files;
}

Note, this probably breaks for symlinks, but that should be a simple addition.

Answer 2

FS.readdir() returns childs of directory.