Copy files recursive and replace strings

copy.js

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


function copyRecursive(src, dest) {
    var copyPromises = [];

    var copy = function copy(src, dest) {
        var exists = fs.existsSync(src);
        var stats = exists && fs.statSync(src);
        var isDirectory = exists && stats.isDirectory();
        if (exists && isDirectory) {
            if (!fs.existsSync(dest)) {
                fs.mkdirSync(dest);
            }
            fs.readdirSync(src).forEach(function(childItemName) {
                copy(
                    path.join(src, childItemName),
                    path.join(dest, childItemName)
                );
            });
        } else {
            copyPromises.push(copyFile(src, dest));
        }
    };

    copy(src, dest);
    return Promise.all(copyPromises);
}

function copyFile(source, target) {
    return new Promise(function(resolve, reject) {
            var readFile = fs.createReadStream(source);
            readFile.on('error', reject);
            var writeFile = fs.createWriteStream(target);
            writeFile.on('error', reject);
            writeFile.on('finish', resolve);
            readFile.pipe(writeFile);
        });
}

function replaceName(file, name, done) {
    fs.readFile(file, 'utf8', function (error, data) {
        if (error) {
            return console.log(error);
        }
        var result = data.replace(/{{name}}/g, name);

        fs.writeFile(file, result, 'utf8', function (err) {
            if (err) {
                return console.log(err);
            } else {
                done();
            }
        });
    });
}

copyRecursive('./testfolder/', './yo/')
    .then(function() {
        replaceName('./yo/doc/t.txt', 'Oskar är bäst', function() {
            console.log('Klart');
        });
    }).catch(function(error) {
        console.log(error);
    });