WARNING: This library is highly experimental, and may introduce breaking changes.

shoeset

This is a 7z archive decompressor, written in Rust. The code is designed to be portable:

• Run natively as a binary
• Run as WebAssembly in a web browser or Node.js

Supported decompression algorithms:

• LZMA
• LZMA2

Features of 7z that are not supported:

• Archive compression
• CRC validation
• Other decompression algorithms

The library is called "shoeset" because that's approximately how you pronounce "7z" in Norwegian.

Usage with JavaScript/WebAssembly

Installation:

npm install @eirslett/shoeset

From Node.js:

import * as shoeset from '@eirslett/shoeset';
import fs from 'fs';

const archive = fs.readFileSync('foobar.7z');
const decompressed = shoeset.default.decompress(archive);
for (const file of decompressed.files) {
    console.log('name', file.name);
    console.log('data', file.data);
    
    // If the file is UTF-8 encoded, we can log it as a string:
    console.log(new TextDecoder().decode(file.data));
}

From the browser:

const js = import(`./node_modules/@eirslett/shoeset/shoeset.js`);

fetch('/foobar.7z').then(async response => {
    const data = await response.arrayBuffer();
    const mod = await js;

    const result = mod.decompress(new Uint8Array(data));

    for (const file of result.files) {
        console.log('name', file.name);
        console.log('data', file.data);

        // If the file is UTF-8 encoded, we can log it as a string:
        console.log(new TextDecoder().decode(file.data));
    }
});

Building

1. Setup rust on your development machine, for example with rustup.
2. git clone this repository
3. Run cargo build to build the native binary, or ./build-npm.sh to build the npm package
4. Run cargo test to run the unit tests, or ./test.sh to test the npm package

Publishing to NPM

1. ./build-npm.sh
2. cd pkg
3. npm publish --access public

Local development setup

1. Run ./build-npm.sh
2. cd pkg
3. npm link
4. cd ../site
5. npm link @eirslett/shoeset
6. node test-nodejs.mjs to check if the code is working

Contributing

Just send me a pull request. I cannot guarantee that I have time to review it, if there are many PRs.