zpao / bundle-collapser

convert bundle paths to IDs to save bytes in browserify bundles

bundle-collapser

convert bundle paths to IDs to save bytes in browserify bundles

example

var collapse = require('bundle-collapser');
var fs = require('fs');

var src = fs.readFileSync(__dirname + '/bundle.js', 'utf8');
collapse(src).pipe(process.stdout);

The input bundle has require(string) paths in it:

(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
module.exports = function (n) { return n * 5 }

},{}],2:[function(require,module,exports){
var bar = require('./bar.js');

module.exports = function (n) { return bar(n+1) }

},{"./bar.js":1}],3:[function(require,module,exports){
var foo = require('./foo.js');
var bar = require('./bar.js');

console.log(foo(5) * bar(2));

},{"./bar.js":1,"./foo.js":2}]},{},[3]);

but the output just has the integers:

(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
module.exports = function (n) { return n * 5 }


},{}],2:[function(require,module,exports){
var bar = require(1);

module.exports = function (n) { return bar(n+1) }


},{}],3:[function(require,module,exports){
var foo = require(2);
var bar = require(1);

console.log(foo(5) * bar(2));
},{}]},{},[3]);

usage

There is also a command-line program included in this distribution:

usage: bundle-collapser {FILE | -} {OPTIONS}

  Collapse a browser-pack/browserify bundle from STDIN or a FILE.

OPTIONS:

  -h --help  Show this message.

methods

var collapse = require('bundle-collapser')

var stream = collapse(src)

Return a readable stream of output from browser-pack with the input source string src converted to have its require() calls collapsed down to the dependency targets in the "deps" fields from the unpacking.

install

With npm, to get the library do:

npm install bundle-collapser

and to get the command-line program do:

npm install -g bundle-collapser

license

MIT