Recursive fs.readdir with relative file paths

readdirRecursive.js

const path = require('path');
const fs = require('fs');

/* Prepend the given path segment */
const prependPathSegment = pathSegment => location => path.join(pathSegment, location);

/* fs.readdir but with relative paths */
const readdirPreserveRelativePath = location => fs.readdirSync(location).map(prependPathSegment(location));

/* Recursive fs.readdir but with relative paths */
const readdirRecursive = location => readdirPreserveRelativePath(location)
    .reduce((result, currentValue) => fs.statSync(currentValue).isDirectory()
        ? result.concat(readdirRecursive(currentValue))
        : result.concat(currentValue), []);