How to automatically zip files with Node.js and npm

Is there a way to automatically zip certain files at the build time with Node.js and npm?

For example, I have a project, that file structure looks like this:

Project/
--lib/
--node_modules/
--test/
--index.js
--package.json

I want to be able to zip lib folder, certain modules from node_modules and index.js into some zip archive to upload it on the AWS Lambda, for example. I do not need test folder or test Node.js modules (mocha and chai) to be zipped. I have even created a bash script for generating zip file, but is there a way to automatically execute this script, when ‘npm install’ is called?

This should be a standard problem and it should have a standard solution, but I was unable to discover such.

UPDATE

thanks to michael, decided to use gulp. This is my script, in case some one else will need it for AWS Lambda:

var gulp = require('gulp');
var clean = require('gulp-clean');
var zip = require('gulp-zip');
var merge = require('merge-stream');

gulp.task('clean', function () {
    var build = gulp.src('build', {read: false})
        .pipe(clean());
    var dist = gulp.src('dist', {read: false})
        .pipe(clean());

    return merge(build, dist);
});

gulp.task('build', function() {
    var index = gulp.src('index.js')
        .pipe(gulp.dest('build'));
    var lib = gulp.src('lib/**')
        .pipe(gulp.dest('build/lib'));
    var async = gulp.src('node_modules/async/**')
        .pipe(gulp.dest('build/node_modules/async'));
    var collections = gulp.src('node_modules/collections/**')
        .pipe(gulp.dest('build/node_modules/collections'));
    var underscore = gulp.src('node_modules/underscore/**')
        .pipe(gulp.dest('build/node_modules/underscore'));
    var util = gulp.src('node_modules/util/**')
        .pipe(gulp.dest('build/node_modules/util'));
    var xml2js = gulp.src('node_modules/xml2js/**')
        .pipe(gulp.dest('build/node_modules/xml2js'));

    return merge(index, lib, async, collections, underscore, util, xml2js);
});

gulp.task('zip', ['build'], function() {
    return gulp.src('build/*')
        .pipe(zip('archive.zip'))
        .pipe(gulp.dest('dist'));
});

gulp.task('default', ['zip']);

Answer

I would go with gulp using gulp-sftp, gulp-tar and gulp-gzip and an alias as command. Create a file called .bash_aliases in your users home folder containing

alias installAndUpload='npm install && gulp runUploader'

After a reboot you can call both actions at once with this alias.

A gulp file could look something like this

var gulp = require('gulp');
var watch = require('gulp-watch');
var sftp = require('gulp-sftp');
var gzip = require('gulp-gzip');

gulp.task('runUploader', function () {
    gulp.src('.path/to/folder/to/compress/**')
        .pipe(tar('archive.tar'))
        .pipe(gzip())
        .pipe(gulp.dest('path/to/folder/to/store')) // if you want a local copy
        .pipe(sftp({
            host: 'website.com',
            user: 'johndoe',
            pass: '1234'
        }))
});

Of course, you can also add gulp-watch to automatically create the tar/zip and upload it whenever there is a change in the directory.