How to get array of values ​​from async recursive function?

Question

recursion

There is a function, recursive, that runs through the file system

const scanDir = async (dir, filelist = []) =>{
    const files = await readdir(dir);
    files.forEach(async (file)=>{
        const dirFile = path.join(dir, file);
        try {
            filelist = await scanDir(dirFile, filelist);
        }
        catch (err) {
            if (err.code === 'ENOTDIR' || err.code === 'EBUSY')
            {                
                filelist = await [...filelist, dirFile];
                
            }
            else throw err;
        }
    });

    return filelist;
};

Connected modules and features

const fs = require('fs')
    ,{promisify} = require('util')  
    ,readdir = promisify(fs.readdir)
    ,exists = promisify(fs.exists)
    ,mkdir = promisify(fs.mkdir)
    ,copyFile = promisify(fs.copyFile);

I probably don’t understand something, there is little experience, but as I see it, it returns the filelist array, which is passed to the recursion further.
But how to accept this array after the end of the function?
That is, it doesn’t work like this:
const myArr = scanDir(dir);
I tried to wrap it in an async function and wait until scanDir resolves, something like this:

(async()=>{
const myArr = await scanDir(dir);
})()

But that doesn't work either. I also try this:

scanDir(dir).catch(
    (err)=>{
        console.log(err);
    }
).then(

    (data)=>{console.log(data.length)}

);

An array is returned in data, but it is empty. Can you please tell me how to get the full array from the scanDir function?

Answer 1

Promise.all([array of promises]).then( (data ) => {})