leodemoura / lean.js

Lean ported to Javascript with Emscripten

lean.js

LIVE DEMO: https://leanprover.github.com/live

This is a project to aid porting Lean code to Javascript using an amazing tool called Emscripten. It includes an Emscripten build for GMP, MPFR, and LUA (dependencies of Lean), which may be of use in their own right. This repository is based on cgaljs.

Note that this package only works on 32-bit virtual machines. We have tested it on Ubuntu-14.04 (32-bit) machines.

We host the latest version of compiled javascript at gh-pages branch of this repository. You can link the compiled javascript from your HTML code:

<script src="https://leanprover.github.io/lean.js/lean.js" type="text/javascript" charset="utf-8"></script>

Required Packages (on Ubuntu-14.04)

sudo apt-get update
sudo apt-get install build-essential cmake python2.7 nodejs default-jre git wget m4
sudo apt-get install libgmp-dev libmpfr-dev liblua5.2-dev clang-3.3
sudo apt-get install nodejs-legacy    # If the executable of node.js is `nodejs` instead of `node`
wget https://s3.amazonaws.com/mozilla-games/emscripten/releases/emsdk-portable.tar.gz
tar xvf emsdk-portable.tar.gz
cd emsdk_portable
./emsdk update
./emsdk install latest
./emsdk activate latest

Build lean.js

Make sure that you have the following line on your ~/.bashrc.

source ~/PATH/TO/emsdk_portable/emsdk_set_env.sh

Execute the following script to checkout and build lean.js.

git clone https://github.com/leanprover/lean.js
cd lean.js
make

• The generated lean.js file is located at build/lean_js/source/lean-master/shell directory.
• make push will destructively update the gh-pages branch of origin repository.