Reason: Build Systems Rapidly

Approachable syntax.
Powerful, automatic source code formatting.
Adopt incrementally with JavaScript/C interop.
Ahead-of-time compilation to assembly - without a language level VM.
Rapidly develop and share projects.

Getting Started

Check out the docs which guide you through the basic syntax and toolchain features.

Workflow for compiling to native: http://facebook.github.io/reason/nativeWorkflow.html Workflow for compiling to JS: http://facebook.github.io/reason/jsWorkflow.html

Community

Get in touch! We're on:

IRC freenode #reasonml
Discord
Twitter

Contributing

Documentations

The docs are in the docs folder and the corresponding README there that describes the docs contribution method.

Codebase

See the src folder and the corresponding README.

# On OSX, install opam via Homebrew:
brew update
brew install opam
# On Linux, see here (you will need opam >= 1.2.2): http://opam.ocaml.org/doc/Install.html

opam init
# Add this to your ~/.bashrc (or ~/.zshrc):
#   eval $(opam config env)

opam update
opam switch 4.03.0
eval $(opam config env)
git clone git@github.com:facebook/reason.git
cd reason
opam pin add -y reason-parser reason-parser
opam pin add -y reason .

Note: during the last opam pin step, make sure your local repo is clean. In particular, remove artifacts and node_modules. Otherwise the pinning might go stale or stall due to the big node_modules.

License

See Reason license in LICENSE.txt.

Works that are forked from other projects are under their original licenses.

Editor plugins (which have also been forked) in the editorSupport/ directory include their own licenses.