Fetching and unpacking archives. This package uses compiled libarchive into wasm and supports: tar, bzip2, zstd, zlib, zip, ustar, pax, v7, gnutar, cpio, mtree.

Note: To add the support of another archive format, libarchive should be compiled again with --with-[name-archive-lib] into wasm here Libarchive recipe and then run yarn run build in this project to make new unpack.js and unpack.wasm files.

This package has 2 methods:

• extract(url) - downloads an archive through the url and returns extracted data as an object representing the file structure:

{
 "file1": Uint8Array
 "info/paths.json": Uint8Array,
 ...
}

• exctractData(data) - accepts Uint8Array archive data and returns exracted data in the same format which extract method does.

The example of using:

import { initUntarJS } from "@emscripten-forge/untarjs";
const untarjs = await initUntarJS();
const condaPackageUrl = 'https://conda.anaconda.org/conda-forge/linux-64/_libgcc_mutex-0.1-conda_forge.tar.bz2';
untarjs.extract(condaPackageUrl).then((files)=>{
 console.log(files);
});

Note: If this package is used in the project where Webpack is used then webpack.config should include next:

resolve: {
 fallback: {
 "path": require.resolve("path-browserify"),
 "crypto": require.resolve("crypto-browserify"),
 "stream": require.resolve("stream-browserify"),
 "buffer": require.resolve("buffer/"),
 "process": require.resolve("process/browser"),
 "assert": require.resolve("assert/"),
 "http": require.resolve("stream-http"),
 "https": require.resolve("https-browserify"),
 "os": require.resolve("os-browserify/browser"),
 "url": require.resolve("url/"),
 "fs": require.resolve("browserify-fs"),
 "vm": require.resolve("vm-browserify")
 }
 },