Path system in Windows - node.js

I want to give a path to my node project package.json script. I have a one folder called X. X has 10 folders and one of them has file Y. I don't know which folder has file Y. How do I write a path?


If you are trying to find the file Y inside one of the subfolders of X and then return/print the path, you can try the following. This will look through all the files within the passed directory and recursively continue to do so if there are subdirectories:
const path = require('path');
const fs = require('fs');
async function findFileRecursively(fileName, currentDirectory) {
const files = await fs.promises.readdir(currentDirectory);
for (let currFile of files) {
const filePath = path.join(currentDirectory, currFile);
const stats = await fs.promises.stat(filePath);
if (currFile === fileName) {
return filePath;
} else if (stats.isDirectory()) {
const result = await findFileRecursively(fileName, filePath);
if (result) {
return result;
}
}
}
}
(async () => {
try {
const result = await findFileRecursively("filename.txt", './path-to-basefolder');
if (result) console.log("File found at path: " + result)
else console.log("File could not be found");
} catch (err) {
console.log(err.message);
}
})();

Related

nodejs with tar-fs : Missing files in tar file

I have a problem with tar-fs. When I try to tar a folder with multiple directories and files up to a total of 37GB it completes without errors, But when I try to extract the files I only get files back up to approximately 8GB. I'missing files in the resulting tar file.
I have now replaced tar-fs with tar (node-tar) and this has solved this problem. This indicates that tar-fs is not working properly.
const fs = require('fs');
const tar = require('tar-fs');
const { pipeline, Transform } = require('stream');
exports.compress = function (opts, callback) {
// utility
var error = function (error) {
callback(error);
};
// ensure callback
callback = callback || function () {};
// ensure opts
opts = opts || {};
// ensure src and dest
if(!opts.src) return error("No source for compress!");
if(!opts.dest) return error("No destination for compress!");
const tarstrm = tar.pack(opts.src, {});
const deststrm = fs.createWriteStream(opts.dest);
pipeline(tarstrm, deststrm, (err) => {
if (err) {
console.error('An error occurred:', err);
error(err);
// process.exitCode = 1;
} else {
//console.log(hash.copy().digest('hex'));
}
});
}

How can I search a folder AND its sub-folders for a certain file and then get the file of it? (NodeJS)

I am building a npm module and I want to search the user's folder and its subfolders for a file (ex. config.json).
So basically I need a function which takes in the file name as an parameter and returns the file's path.
Can someone help me?

This will search recursively and return the found file(s) as an array.
const fs = require('fs');
const path = require('path');
const search = async (targetPath, findFile) => {
const files = await fs.promises.readdir(targetPath);
const result = [];
for (let file of files) {
try {
const filepath = path.join(targetPath, file);
const stats = await fs.promises.lstat(filepath);
if (stats.isDirectory()) {
const childFiles = await fs.promises.readdir(filepath);
files.push(...childFiles.map((f) => path.join(file, f)));
}
if (stats.isFile() && path.basename(file) === findFile) {
result.push(filepath);
}
} catch (err) {
console.error(err);
}
}
return result;
}
const run = async () => {
try {
const found = await search('path/to/search', 'config.json');
console.log(found);
} catch (err) {
console.error(err);
}
}
run();

How to download all files in aws S3folder in local machine using node js

I have an S3 bucket which has a folder with some files I want to download all the files in that folder to the local machine folder I tried for the single file it's working how to download multiple files.
As per below code in key folderA has 10 files I want to download all the ten to localfolder directory which I mentioned in s3.getObject(params).createReadStream().pipe(ws);
My code :
const downloadObject = () => {
var params = { Bucket: "Sample", Key:"folderA/"};
const ws = fs.createWriteStream(`${__dirname}/localfolder/`);
const s3Stream = s3.getObject(params).createReadStream().pipe(ws);
s3Stream.on("error", (err) => {
ws.end();
});
s3Stream.on("close", () => {
console.log(`downloaded successfully from s3 at ${new Date()}`);
ws.end();
});
};
expected output:
s3 -> bucket/folderA/<10 files>
localmachine -> localfolder/<need all 10 files in local>

There is quite alot to it,
Firstly you would need to list all buckets, then loop over all the buckets (if you only want one fine). Create a local directory if not found etc.
Then find out all files in the bucket and then loop over them, on each path you the get the object and store it.
Here is how would do it with the minio js client (the calls would be the same) tweak it to your needs obviously the folder paths would be different.
/**
* S3 images pull script
*/
const fs = require('fs')
const path = require('path')
const util = require('util')
const readFile = util.promisify(fs.readFile)
const writeFile = util.promisify(fs.writeFile)
//
const rootPath = path.join(__dirname, '..')
const publicPath = path.join(rootPath, 'public', 'images')
//
require('dotenv').config({
path: path.join(rootPath, '.env')
})
// minio client S3
const s3 = new(require('minio')).Client({
endPoint: process.env.S3_HOST,
port: parseInt(process.env.S3_PORT, 10),
useSSL: process.env.S3_USE_SSL === 'true',
accessKey: process.env.S3_ACCESS_KEY,
secretKey: process.env.S3_ACCESS_SECRET,
region: process.env.S3_REGION
})
/**
* Functions
*/
const mkdir = dirPath => {
dirPath.split(path.sep).reduce((prevPath, folder) => {
const currentPath = path.join(prevPath, folder, path.sep);
if (!fs.existsSync(currentPath)) {
fs.mkdirSync(currentPath);
}
return currentPath
}, '')
}
// list objects in bucket
const listObjects = bucket => new Promise(async (resolve, reject) => {
//
bucket.objects = []
bucket.total_objects = 0
bucket.total_size = 0
//
let stream = await s3.listObjectsV2(bucket.name, '', true)
//
stream.on('data', obj => {
if (obj && (obj.name || obj.prefix)) {
bucket.objects.push(obj)
bucket.total_objects++
bucket.total_size = bucket.total_size + obj.size
}
})
//
stream.on('end', () => resolve(bucket))
stream.on('error', e => reject(e))
})
// get an objects data
const getObject = (bucket, name) => new Promise((resolve, reject) => {
s3.getObject(bucket, name, (err, stream) => {
if (err) reject(err)
//
let chunks = []
stream.on('data', chunk => chunks.push(chunk))
stream.on('end', () => resolve(Buffer.concat(chunks || [])))
stream.on('error', e => reject(e))
})
})
/**
*
*/
async function main() {
// get buckets
console.log(`Fetching buckets from: ${process.env.S3_HOST}`)
let buckets = []
try {
buckets = await s3.listBuckets()
console.log(buckets.length + ' buckets found')
} catch (e) {
return console.error(e)
}
// create local folders if not exists
console.log(`Creating local folders in ./api/public/images/ if not exists`)
try {
for (let bucket of buckets) {
//
bucket.local = path.join(publicPath, bucket.name)
try {
await fs.promises.access(bucket.local)
} catch (e) {
if (e.code === 'ENOENT') {
console.log(`Creating local folder: ${bucket.local}`)
await fs.promises.mkdir(bucket.local)
} else
bucket.error = e.message
}
}
} catch (e) {
return console.error(e)
}
// fetch all bucket objects
console.log(`Populating bucket objects`)
try {
for (let bucket of buckets) {
bucket = await listObjects(bucket)
}
} catch (e) {
console.log(e)
}
// loop over buckets and download all objects
try {
for (let bucket of buckets) {
console.log(`Downloading bucket: ${bucket.name}`)
// loop over and download
for (let object of bucket.objects) {
// if object name has prefix
let dir = path.dirname(object.name)
if (dir !== '.') {
try {
await fs.promises.access(path.join(bucket.local, dir))
} catch (e) {
if (e.code === 'ENOENT') {
console.log(`Creating local folder: ${bucket.local}`)
mkdir(path.join(bucket.local, dir))
}
}
}
//
console.log(`Downloading object[${bucket.name}]: ${object.name}`)
await writeFile(path.join(bucket.local, object.name), await getObject(bucket.name, object.name))
}
}
console.log(`Completed!`)
} catch (e) {
console.log(e)
}
}
main()

How to print no file exists in a directory in node js

I made a program with cron npm to copy a file from a directory to another directory once a 5 minute for example if their is no file in source directory it should say no file exists, this is my code
const cron = require("node-cron");
const ncp = require('ncp').ncp;
const fs = require("fs");
var source = './temp';
var destination = './lib';
cron.schedule("*/5 * * * *", function () {
ncp(source, destination, function (err) {
if (err) {
return console.error(err);
}
console.log('done!');
});
});
In my case if the process is success its printing Done! and even if thier is no file in the source its printing Done but i want to print No file exists can anyone help me

You can use fs.existsSync(path)
It will return true if the path exists, otherwise false.
Try this
if (!fs.existsSync(path)) {
console.log('No file exists');
}

Here is my solution, you can use readdir to check the contents of the source folder. If the files count is greater than 0 copy them, else do nothing.
Hope this answers your question.
const cron = require("node-cron");
const ncp = require('ncp').ncp;
const fs = require("fs");
var source = './temp';
var destination = './lib';
cron.schedule("*/5 * * * *", function() {
fs.readdir(source, function(err, files) {
if (err) {
return console.error(err);
}
if (files.length === 0) {
console.log('empty folder!');
} else {
ncp(source, destination, function(err) {
if (err) {
return console.error(err);
}
console.log('done!');
});
}
})
});

Node.js fs.readdir recursive directory search

Any ideas on an async directory search using fs.readdir? I realize that we could introduce recursion and call the read directory function with the next directory to read, but I'm a little worried about it not being async...
Any ideas? I've looked at node-walk which is great, but doesn't give me just the files in an array, like readdir does. Although
Looking for output like...
['file1.txt', 'file2.txt', 'dir/file3.txt']

There are basically two ways of accomplishing this. In an async environment you'll notice that there are two kinds of loops: serial and parallel. A serial loop waits for one iteration to complete before it moves onto the next iteration - this guarantees that every iteration of the loop completes in order. In a parallel loop, all the iterations are started at the same time, and one may complete before another, however, it is much faster than a serial loop. So in this case, it's probably better to use a parallel loop because it doesn't matter what order the walk completes in, just as long as it completes and returns the results (unless you want them in order).
A parallel loop would look like this:
var fs = require('fs');
var path = require('path');
var walk = function(dir, done) {
var results = [];
fs.readdir(dir, function(err, list) {
if (err) return done(err);
var pending = list.length;
if (!pending) return done(null, results);
list.forEach(function(file) {
file = path.resolve(dir, file);
fs.stat(file, function(err, stat) {
if (stat && stat.isDirectory()) {
walk(file, function(err, res) {
results = results.concat(res);
if (!--pending) done(null, results);
});
} else {
results.push(file);
if (!--pending) done(null, results);
}
});
});
});
};
A serial loop would look like this:
var fs = require('fs');
var path = require('path');
var walk = function(dir, done) {
var results = [];
fs.readdir(dir, function(err, list) {
if (err) return done(err);
var i = 0;
(function next() {
var file = list[i++];
if (!file) return done(null, results);
file = path.resolve(dir, file);
fs.stat(file, function(err, stat) {
if (stat && stat.isDirectory()) {
walk(file, function(err, res) {
results = results.concat(res);
next();
});
} else {
results.push(file);
next();
}
});
})();
});
};
And to test it out on your home directory (WARNING: the results list will be huge if you have a lot of stuff in your home directory):
walk(process.env.HOME, function(err, results) {
if (err) throw err;
console.log(results);
});
EDIT: Improved examples.

This one uses the maximum amount of new, buzzwordy features available in node 8, including Promises, util/promisify, destructuring, async-await, map+reduce and more, making your co-workers scratch their heads as they try to figure out what is going on.
Node 8+
No external dependencies.
const { promisify } = require('util');
const { resolve } = require('path');
const fs = require('fs');
const readdir = promisify(fs.readdir);
const stat = promisify(fs.stat);
async function getFiles(dir) {
const subdirs = await readdir(dir);
const files = await Promise.all(subdirs.map(async (subdir) => {
const res = resolve(dir, subdir);
return (await stat(res)).isDirectory() ? getFiles(res) : res;
}));
return files.reduce((a, f) => a.concat(f), []);
}
Usage
getFiles(__dirname)
.then(files => console.log(files))
.catch(e => console.error(e));
Node 10.10+
Updated for node 10+ with even more whizbang:
const { resolve } = require('path');
const { readdir } = require('fs').promises;
async function getFiles(dir) {
const dirents = await readdir(dir, { withFileTypes: true });
const files = await Promise.all(dirents.map((dirent) => {
const res = resolve(dir, dirent.name);
return dirent.isDirectory() ? getFiles(res) : res;
}));
return Array.prototype.concat(...files);
}
Note that starting with node 11.15.0 you can use files.flat() instead of Array.prototype.concat(...files) to flatten the files array.
Node 11+
If you want to blow everybody's head up completely, you can use the following version using async iterators. In addition to being really cool, it also allows consumers to pull results one-at-a-time, making it better suited for really large directories.
const { resolve } = require('path');
const { readdir } = require('fs').promises;
async function* getFiles(dir) {
const dirents = await readdir(dir, { withFileTypes: true });
for (const dirent of dirents) {
const res = resolve(dir, dirent.name);
if (dirent.isDirectory()) {
yield* getFiles(res);
} else {
yield res;
}
}
}
Usage has changed because the return type is now an async iterator instead of a promise
;(async () => {
for await (const f of getFiles('.')) {
console.log(f);
}
})()
In case somebody is interested, I've written more about async iterators here: https://qwtel.com/posts/software/async-generators-in-the-wild/

Just in case anyone finds it useful, I also put together a synchronous version.
var walk = function(dir) {
var results = [];
var list = fs.readdirSync(dir);
list.forEach(function(file) {
file = dir + '/' + file;
var stat = fs.statSync(file);
if (stat && stat.isDirectory()) {
/* Recurse into a subdirectory */
results = results.concat(walk(file));
} else {
/* Is a file */
results.push(file);
}
});
return results;
}
Tip: To use less resources when filtering. Filter within this function itself. E.g. Replace results.push(file); with below code. Adjust as required:
file_type = file.split(".").pop();
file_name = file.split(/(\\|\/)/g).pop();
if (file_type == "json") results.push(file);

A. Have a look at the file module. It has a function called walk:
file.walk(start, callback)
Navigates a file tree, calling callback for each directory, passing in
(null, dirPath, dirs, files).
This may be for you! And yes, it is async. However, I think you would have to aggregate the full path's yourself, if you needed them.
B. An alternative, and even one of my favourites: use the unix find for that. Why do something again, that has already been programmed? Maybe not exactly what you need, but still worth checking out:
var execFile = require('child_process').execFile;
execFile('find', [ 'somepath/' ], function(err, stdout, stderr) {
var file_list = stdout.split('\n');
/* now you've got a list with full path file names */
});
Find has a nice build-in caching mechanism that makes subsequent searches very fast, as long as only few folder have changed.

I recommend using node-glob to accomplish that task.
var glob = require( 'glob' );
glob( 'dirname/**/*.js', function( err, files ) {
console.log( files );
});

Another nice npm package is glob.
npm install glob
It is very powerful and should cover all your recursing needs.
Edit:
I actually wasn't perfectly happy with glob, so I created readdirp.
I'm very confident that its API makes finding files and directories recursively and applying specific filters very easy.
Read through its documentation to get a better idea of what it does and install via:
npm install readdirp

Short, Modern and Efficient:
import {readdir} from 'node:fs/promises'
import {join} from 'node:path'
const deepReadDir = async (dirPath) => await Promise.all(
(await readdir(dirPath, {withFileTypes: true})).map(async (dirent) => {
const path = join(dirPath, dirent.name)
return dirent.isDirectory() ? await deepReadDir(path) : path
}),
)
Special thank to Function for hinting use of {withFileTypes: true}.
This auto folds each nested path into a new nested array. For example if:
await deepReadDir('src')
returns something like this:
[
[
'src/client/api.js',
'src/client/http-constants.js',
'src/client/index.html',
'src/client/index.js',
[ 'src/client/res/favicon.ico' ],
'src/client/storage.js'
],
[ 'src/crypto/keygen.js' ],
'src/discover.js',
[
'src/mutations/createNewMutation.js',
'src/mutations/newAccount.js',
'src/mutations/transferCredit.js',
'src/mutations/updateApp.js'
],
[
'src/server/authentication.js',
'src/server/handlers.js',
'src/server/quick-response.js',
'src/server/server.js',
'src/server/static-resources.js'
],
[ 'src/util/prompt.js', 'src/util/safeWriteFile.js' ],
'src/util.js'
]
But you can easily flat it, if you want:
(await deepReadDir('src')).flat(Number.POSITIVE_INFINITY)
[
'src/client/api.js',
'src/client/http-constants.js',
'src/client/index.html',
'src/client/index.js',
'src/client/res/favicon.ico',
'src/client/storage.js',
'src/crypto/keygen.js',
'src/discover.js',
'src/mutations/createNewMutation.js',
'src/mutations/newAccount.js',
'src/mutations/transferCredit.js',
'src/mutations/updateApp.js',
'src/server/authentication.js',
'src/server/handlers.js',
'src/server/quick-response.js',
'src/server/server.js',
'src/server/static-resources.js',
'src/util/prompt.js',
'src/util/safeWriteFile.js',
'src/util.js'
]

If you want to use an npm package, wrench is pretty good.
var wrench = require("wrench");
var files = wrench.readdirSyncRecursive("directory");
wrench.readdirRecursive("directory", function (error, files) {
// live your dreams
});
EDIT (2018):
Anyone reading through in recent time: The author deprecated this package in 2015:
wrench.js is deprecated, and hasn't been updated in quite some time. I heavily recommend using fs-extra to do any extra filesystem operations.

Async
const fs = require('fs')
const path = require('path')
const readdir = (p, done, a = [], i = 0) => fs.readdir(p, (e, d = []) =>
d.map(f => readdir(a[a.push(path.join(p, f)) - 1], () =>
++i == d.length && done(a), a)).length || done(a))
readdir(__dirname, console.log)
Sync
const fs = require('fs')
const path = require('path')
const readdirSync = (p, a = []) => {
if (fs.statSync(p).isDirectory())
fs.readdirSync(p).map(f => readdirSync(a[a.push(path.join(p, f)) - 1], a))
return a
}
console.log(readdirSync(__dirname))
Async readable
function readdir (currentPath, done, allFiles = [], i = 0) {
fs.readdir(currentPath, function (e, directoryFiles = []) {
if (!directoryFiles.length)
return done(allFiles)
directoryFiles.map(function (file) {
var joinedPath = path.join(currentPath, file)
allFiles.push(joinedPath)
readdir(joinedPath, function () {
i = i + 1
if (i == directoryFiles.length)
done(allFiles)}
, allFiles)
})
})
}
readdir(__dirname, console.log)
Note: both versions will follow symlinks (same as the original fs.readdir)

With Recursion
var fs = require('fs')
var path = process.cwd()
var files = []
var getFiles = function(path, files){
fs.readdirSync(path).forEach(function(file){
var subpath = path + '/' + file;
if(fs.lstatSync(subpath).isDirectory()){
getFiles(subpath, files);
} else {
files.push(path + '/' + file);
}
});
}
Calling
getFiles(path, files)
console.log(files) // will log all files in directory

I loved the answer from chjj above and would not have been able to create my version of the parallel loop without that start.
var fs = require("fs");
var tree = function(dir, done) {
var results = {
"path": dir
,"children": []
};
fs.readdir(dir, function(err, list) {
if (err) { return done(err); }
var pending = list.length;
if (!pending) { return done(null, results); }
list.forEach(function(file) {
fs.stat(dir + '/' + file, function(err, stat) {
if (stat && stat.isDirectory()) {
tree(dir + '/' + file, function(err, res) {
results.children.push(res);
if (!--pending){ done(null, results); }
});
} else {
results.children.push({"path": dir + "/" + file});
if (!--pending) { done(null, results); }
}
});
});
});
};
module.exports = tree;
I created a Gist as well. Comments welcome. I am still starting out in the NodeJS realm so that is one way I hope to learn more.

Use node-dir to produce exactly the output you like
var dir = require('node-dir');
dir.files(__dirname, function(err, files) {
if (err) throw err;
console.log(files);
//we have an array of files now, so now we can iterate that array
files.forEach(function(path) {
action(null, path);
})
});

Here is a simple synchronous recursive solution
const fs = require('fs')
const getFiles = path => {
const files = []
for (const file of fs.readdirSync(path)) {
const fullPath = path + '/' + file
if(fs.lstatSync(fullPath).isDirectory())
getFiles(fullPath).forEach(x => files.push(file + '/' + x))
else files.push(file)
}
return files
}
Usage:
const files = getFiles(process.cwd())
console.log(files)
You could write it asynchronously, but there is no need. Just make sure that the input directory exists and is accessible.

Modern promise based read dir recursive version:
const fs = require('fs');
const path = require('path');
const readDirRecursive = async (filePath) => {
const dir = await fs.promises.readdir(filePath);
const files = await Promise.all(dir.map(async relativePath => {
const absolutePath = path.join(filePath, relativePath);
const stat = await fs.promises.lstat(absolutePath);
return stat.isDirectory() ? readDirRecursive(absolutePath) : absolutePath;
}));
return files.flat();
}

qwtel's answer variant, in TypeScript
import { resolve } from 'path';
import { readdir } from 'fs/promises';
async function* getFiles(dir: string): AsyncGenerator<string> {
const entries = await readdir(dir, { withFileTypes: true });
for (const entry of entries) {
const res = resolve(dir, entry.name);
if (entry.isDirectory()) {
yield* getFiles(res);
} else {
yield res;
}
}
}

Vanilla ES6 + async/await + small & readable
I didn't find the answer I was looking for in this thread; there were a few similar elements spread across different answers, but I just wanted something simple and readable.
Just in case it helps anyone in the future (i.e. myself in a couple of months), this I what I ended up using:
const { readdir } = require('fs/promises');
const { join } = require('path');
const readdirRecursive = async dir => {
const files = await readdir( dir, { withFileTypes: true } );
const paths = files.map( async file => {
const path = join( dir, file.name );
if ( file.isDirectory() ) return await readdirRecursive( path );
return path;
} );
return ( await Promise.all( paths ) ).flat( Infinity );
}
module.exports = {
readdirRecursive,
}

I've coded this recently, and thought it would make sense to share this here. The code makes use of the async library.
var fs = require('fs');
var async = require('async');
var scan = function(dir, suffix, callback) {
fs.readdir(dir, function(err, files) {
var returnFiles = [];
async.each(files, function(file, next) {
var filePath = dir + '/' + file;
fs.stat(filePath, function(err, stat) {
if (err) {
return next(err);
}
if (stat.isDirectory()) {
scan(filePath, suffix, function(err, results) {
if (err) {
return next(err);
}
returnFiles = returnFiles.concat(results);
next();
})
}
else if (stat.isFile()) {
if (file.indexOf(suffix, file.length - suffix.length) !== -1) {
returnFiles.push(filePath);
}
next();
}
});
}, function(err) {
callback(err, returnFiles);
});
});
};
You can use it like this:
scan('/some/dir', '.ext', function(err, files) {
// Do something with files that ends in '.ext'.
console.log(files);
});

A library called Filehound is another option. It will recursively search a given directory (working directory by default). It supports various filters, callbacks, promises and sync searches.
For example, search the current working directory for all files (using callbacks):
const Filehound = require('filehound');
Filehound.create()
.find((err, files) => {
if (err) {
return console.error(`error: ${err}`);
}
console.log(files); // array of files
});
Or promises and specifying a specific directory:
const Filehound = require('filehound');
Filehound.create()
.paths("/tmp")
.find()
.each(console.log);
Consult the docs for further use cases and examples of usage: https://github.com/nspragg/filehound
Disclaimer: I'm the author.

Using async/await, this should work:
const FS = require('fs');
const readDir = promisify(FS.readdir);
const fileStat = promisify(FS.stat);
async function getFiles(dir) {
let files = await readDir(dir);
let result = files.map(file => {
let path = Path.join(dir,file);
return fileStat(path).then(stat => stat.isDirectory() ? getFiles(path) : path);
});
return flatten(await Promise.all(result));
}
function flatten(arr) {
return Array.prototype.concat(...arr);
}
You can use bluebird.Promisify or this:
/**
* Returns a function that will wrap the given `nodeFunction`. Instead of taking a callback, the returned function will return a promise whose fate is decided by the callback behavior of the given node function. The node function should conform to node.js convention of accepting a callback as last argument and calling that callback with error as the first argument and success value on the second argument.
*
* #param {Function} nodeFunction
* #returns {Function}
*/
module.exports = function promisify(nodeFunction) {
return function(...args) {
return new Promise((resolve, reject) => {
nodeFunction.call(this, ...args, (err, data) => {
if(err) {
reject(err);
} else {
resolve(data);
}
})
});
};
};
Node 8+ has Promisify built-in
See my other answer for a generator approach that can give results even faster.

Simple, Async Promise Based
const fs = require('fs/promises');
const getDirRecursive = async (dir) => {
try {
const items = await fs.readdir(dir);
let files = [];
for (const item of items) {
if ((await fs.lstat(`${dir}/${item}`)).isDirectory()) files = [...files, ...(await getDirRecursive(`${dir}/${item}`))];
else files.push({file: item, path: `${dir}/${item}`, parents: dir.split("/")});
}
return files;
} catch (e) {
return e
}
};
Usage: await getDirRecursive("./public");

Check out the final-fs library. It provides a readdirRecursive function:
ffs.readdirRecursive(dirPath, true, 'my/initial/path')
.then(function (files) {
// in the `files` variable you've got all the files
})
.otherwise(function (err) {
// something went wrong
});

Standalone promise implementation
I am using the when.js promise library in this example.
var fs = require('fs')
, path = require('path')
, when = require('when')
, nodefn = require('when/node/function');
function walk (directory, includeDir) {
var results = [];
return when.map(nodefn.call(fs.readdir, directory), function(file) {
file = path.join(directory, file);
return nodefn.call(fs.stat, file).then(function(stat) {
if (stat.isFile()) { return results.push(file); }
if (includeDir) { results.push(file + path.sep); }
return walk(file, includeDir).then(function(filesInDir) {
results = results.concat(filesInDir);
});
});
}).then(function() {
return results;
});
};
walk(__dirname).then(function(files) {
console.log(files);
}).otherwise(function(error) {
console.error(error.stack || error);
});
I've included an optional parameter includeDir which will include directories in the file listing if set to true.

klaw and klaw-sync are worth considering for this sort of thing. These were part of node-fs-extra.

For Node 10.3+, here is a for-await solution:
#!/usr/bin/env node
const FS = require('fs');
const Util = require('util');
const readDir = Util.promisify(FS.readdir);
const Path = require('path');
async function* readDirR(path) {
const entries = await readDir(path,{withFileTypes:true});
for(let entry of entries) {
const fullPath = Path.join(path,entry.name);
if(entry.isDirectory()) {
yield* readDirR(fullPath);
} else {
yield fullPath;
}
}
}
async function main() {
const start = process.hrtime.bigint();
for await(const file of readDirR('/mnt/home/media/Unsorted')) {
console.log(file);
}
console.log((process.hrtime.bigint()-start)/1000000n);
}
main().catch(err => {
console.error(err);
});
The benefit of this solution is that you can start processing the results immediately; e.g. it takes 12 seconds to read all the files in my media directory, but if I do it this way I can get the first result within a few milliseconds.

Here's yet another implementation. None of the above solutions have any limiters, and so if your directory structure is large, they're all going to thrash and eventually run out of resources.
var async = require('async');
var fs = require('fs');
var resolve = require('path').resolve;
var scan = function(path, concurrency, callback) {
var list = [];
var walker = async.queue(function(path, callback) {
fs.stat(path, function(err, stats) {
if (err) {
return callback(err);
} else {
if (stats.isDirectory()) {
fs.readdir(path, function(err, files) {
if (err) {
callback(err);
} else {
for (var i = 0; i < files.length; i++) {
walker.push(resolve(path, files[i]));
}
callback();
}
});
} else {
list.push(path);
callback();
}
}
});
}, concurrency);
walker.push(path);
walker.drain = function() {
callback(list);
}
};
Using a concurrency of 50 works pretty well, and is almost as fast as simpler implementations for small directory structures.

The recursive-readdir module has this functionality.

I modified Trevor Senior's Promise based answer to work with Bluebird
var fs = require('fs'),
path = require('path'),
Promise = require('bluebird');
var readdirAsync = Promise.promisify(fs.readdir);
var statAsync = Promise.promisify(fs.stat);
function walkFiles (directory) {
var results = [];
return readdirAsync(directory).map(function(file) {
file = path.join(directory, file);
return statAsync(file).then(function(stat) {
if (stat.isFile()) {
return results.push(file);
}
return walkFiles(file).then(function(filesInDir) {
results = results.concat(filesInDir);
});
});
}).then(function() {
return results;
});
}
//use
walkDir(__dirname).then(function(files) {
console.log(files);
}).catch(function(e) {
console.error(e); {
});

For fun, here is a flow based version that works with highland.js streams library. It was co-authored by Victor Vu.
###
directory >---m------> dirFilesStream >---------o----> out
| |
| |
+--------< returnPipe <-----------+
legend: (m)erge (o)bserve
+ directory has the initial file
+ dirListStream does a directory listing
+ out prints out the full path of the file
+ returnPipe runs stat and filters on directories
###
_ = require('highland')
fs = require('fs')
fsPath = require('path')
directory = _(['someDirectory'])
mergePoint = _()
dirFilesStream = mergePoint.merge().flatMap((parentPath) ->
_.wrapCallback(fs.readdir)(parentPath).sequence().map (path) ->
fsPath.join parentPath, path
)
out = dirFilesStream
# Create the return pipe
returnPipe = dirFilesStream.observe().flatFilter((path) ->
_.wrapCallback(fs.stat)(path).map (v) ->
v.isDirectory()
)
# Connect up the merge point now that we have all of our streams.
mergePoint.write directory
mergePoint.write returnPipe
mergePoint.end()
# Release backpressure. This will print files as they are discovered
out.each H.log
# Another way would be to queue them all up and then print them all out at once.
# out.toArray((files)-> console.log(files))

Using Promises (Q) to solve this in a Functional style:
var fs = require('fs'),
fsPath = require('path'),
Q = require('q');
var walk = function (dir) {
return Q.ninvoke(fs, 'readdir', dir).then(function (files) {
return Q.all(files.map(function (file) {
file = fsPath.join(dir, file);
return Q.ninvoke(fs, 'lstat', file).then(function (stat) {
if (stat.isDirectory()) {
return walk(file);
} else {
return [file];
}
});
}));
}).then(function (files) {
return files.reduce(function (pre, cur) {
return pre.concat(cur);
});
});
};
It returns a promise of an array, so you can use it as:
walk('/home/mypath').then(function (files) { console.log(files); });

I must add the Promise-based sander library to the list.
var sander = require('sander');
sander.lsr(directory).then( filenames => { console.log(filenames) } );

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