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Simple extensive tar-like archive format with indexing

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asar - Electron Archive

dependencies npm version

Asar is a simple extensive archive format, it works like tar that concatenates all files together without compression, while having random access support.

Features

  • Support random access
  • Use JSON to store files' information
  • Very easy to write a parser

Command line utility

Install

$ npm install original-fs-asar

Usage

Only runs inside of Electron.

Using programatically

Example

var asar = require('original-fs-asar');

var src = 'some/path/';
var dest = 'name.asar';

asar.createPackage(src, dest, function() {
  console.log('done.');
})

Please note that there is currently no error handling provided!

Transform

You can pass in a transform option, that is a function, which either returns nothing, or a stream.Transform. The latter will be used on files that will be in the .asar file to transform them (e.g. compress).

var asar = require('original-fs-asar');

var src = 'some/path/';
var dest = 'name.asar';

function transform(filename) {
  return new CustomTransformStream()
}

asar.createPackageWithOptions(src, dest, { transform: transform }, function() {
  console.log('done.');
})

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Simple extensive tar-like archive format with indexing

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