Gulp sftp deploy

gulpfile.js

var gulp = require('gulp');
var path = require('path');
var GulpSSH = require('gulp-ssh');
var shell = require('gulp-shell');
var moment = require('moment');

var config = {
    host: 'ftp.domain.ru',
    port: 22,
    username: 'special',
    privateKey: fs.readFileSync('~/.ssh/id_rsa'),
    agent: process.env.SSH_AUTH_SOCK
};

var archiveName = 'deploy.tgz';
var timestamp = moment().format('YYYYMMDDHHmmssSSS');
var buildPath = './build';
var rootPath = '/uploads/deploy_test/';
var releasesPath = rootPath + 'releases/';
var symlinkPath = rootPath + 'current';
var releasePath = releasesPath + timestamp;

var gulpSSH = new GulpSSH({
    ignoreErrors: false,
    sshConfig: config
});

gulp.task('build', function () {
    return true; // Тут сборка проекта
});

gulp.task('deploy:compress', ['build'], shell.task("tar -cf ./" + archiveName + " --directory=" + buildPath + " ."));

gulp.task('deploy:prepare', function() {
    return gulpSSH.exec("mkdir -p " + releasesPath+  " && cd " + releasesPath + " && mkdir " + timestamp);
});

gulp.task('deploy:upload', ['deploy:prepare', 'deploy:compress'], function() {
    return gulp.src(archiveName)
        .pipe(gulpSSH.sftp('write', releasePath + '/' + archiveName))
});

gulp.task('deploy:uncompress', ['deploy:upload'], function() {
    return gulpSSH.exec("cd " + releasePath + " && tar -xf " + archiveName);
});

gulp.task('deploy:symlink', ['deploy:uncompress'], function() {
    return gulpSSH.exec("rm -f " + symlinkPath + " &&" +
        " ln -s " + releasePath + " " + symlinkPath);
});

gulp.task('deploy:clean', ['deploy:symlink'], shell.task('rm ' + archiveName, {ignoreErrors: true}));

gulp.task('deploy', ['build',
    'deploy:compress',
    'deploy:prepare',
    'deploy:upload',
    'deploy:uncompress',
    'deploy:symlink',
    'deploy:clean']);