fs-iterator/dist/esm/depthFirst/index.js

A file system iterator with filter and asyncIterator iterafaces. Supports Node 0.10 and above

import fsCompat from '../fs-compat/index.js';
import createEntry from './createEntry.js';
import filter from './filter.js';
import stat from './stat.js';
function isDirectory(entry) {
    if (entry.realStats) return entry.realStats.isDirectory();
    return entry.stats.isDirectory();
}
export default function depthFirst(item, iterator, callback) {
    const depth = item.depth;
    const entry = createEntry(iterator, item);
    item = null; // release reference
    stat(iterator, entry, function statCallback(err) {
        if (err || iterator.isDone()) return callback(err);
        filter(iterator, entry, function filterCallback(err, keep) {
            if (err || !keep || iterator.isDone()) return callback(err);
            // not a directory or is a directory, but next level is too deep
            if (!isDirectory(entry) || depth + 1 > iterator.depth) return callback(null, {
                done: false,
                value: entry
            });
            // get files in this directory
            fsCompat.readdir(entry.fullPath, iterator.readdirOptions, (err, files)=>{
                if (err || iterator.isDone()) return callback(err);
                if (files.length) {
                    const stackItems = files.map((x)=>depthFirst.bind(null, {
                            path: entry.path,
                            depth: depth + 1,
                            basename: x
                        })).reverse();
                    iterator.push.apply(iterator, stackItems);
                }
                return callback(null, {
                    done: false,
                    value: entry
                });
            });
        });
    });
}