aioli
Framework for building fast genomics web tools with WebAssembly and WebWorkers
Stars: 100
Aioli is a library for running genomics command-line tools in the browser using WebAssembly. It creates a single WebWorker to run all WebAssembly tools, shares a filesystem across modules, and efficiently mounts local files. The tool encapsulates each module for loading, does WebAssembly feature detection, and communicates with the WebWorker using the Comlink library. Users can deploy new releases and versions, and benefit from code reuse by porting existing C/C++/Rust/etc tools to WebAssembly for browser use.
README:
Aioli is a library for running genomics command-line tools in the browser using WebAssembly. See Who uses biowasm for example use cases.
Run npm install
to install dependencies.
Then run npm run dev
to launch the web server and use src/example.js
as a sample web app that uses the dev version of Aioli.
Run npm run test
.
- Update version in
package.json
(append-rc1
for release candidates) - Build:
npm run build
- Create npm package:
npm pack
- Publish package:
npm publish [tgzfile] --tag next
- To use pre-release version:
npm install @biowasm/aioli@next
- Update version in
package.json
- Build:
npm run build
- Publish package:
npm publish --access public
- Create release in the GitHub repo
- Add to
biowasm.json
- Deploy biowasm CDN with env=stg, tool=aioli and run biowasm tests to validate that stg tests still pass
- Repeat with env=prd
- Aioli creates a single WebWorker, in which all WebAssembly tools run.
- We use a PROXYFS virtual filesystem so we can share a filesystem across all WebAssembly modules, i.e. the output of one tool can be used as the input of another tool.
- We use a WORKERFS virtual filesystem to mount local files efficiently (i.e. without having to load all their contents into memory). To support use cases where tools need to create files in the same folder as those ready-only files (e.g.
samtools index
), we automatically create a symlink from each local file's WORKERFS path to a path in PROXYFS. - Once the WebWorker initializes, it loads the WebAssembly modules one at a time. To support this, we need to encapsulate each module using Emscripten's
-s MODULARIZE=1
, i.e. the.js
file will contain aModule
function that initializes the module and returns aPromise
that resolves when the module is loaded. - We do WebAssembly feature detection at initialization using
wasm-feature-detect
. If a tool needs WebAssembly SIMD and the user has a browser that does not support it, we will load the non-SIMD version of that tool. - We communicate with the WebWorker using the Comlink library.
WebAssembly is a fast, low-level, compiled binary instruction format that runs in all major browsers at near native speeds. One key feature of WebAssembly is code reuse: you can port existing C/C++/Rust/etc tools to WebAssembly so those tools can run in the browser.
WebWorkers allow you to run JavaScript in the browser in a background thread, which keeps the browser responsive.
See the biowasm project.
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