Opal is a ruby runtime for javascript and includes a ruby to javascript source-to-source compiler. The core libraries are written in ruby.
Homepage: http://opalscript.org Github: http://github.com/adambeynon/opal
See homepage for examples etc.
Ruby is under work towards version 0.4.0. To use the latest code, on this master branch, clone the repo:
$ git clone git://github.com/adambeynon/opal.git
The code is nearly ready to run. Firstly, however, you need to compile the corelib (written in ruby) into javascript, so run:
$ rake opal
Which will build the corelib into vm/. Opal is now ready to use.
Opal has a built in REPL that uses therubyracer to hold a built in
context. Try the REPL with:
$ ruby -I ./lib bin/opal irb
This will use the local directory to run the virtual machine.
To quickly run all tests:
$ rake test
This repo contains the code for the opal gem as well as the opal core
library and runtime. Files inside bin/ and lib/ are the files that
are used as part of the gem and run directly on your ruby environment.
corelib/ contains opal's core library implementation and is not used
directly by the gem. These files are precompiled during development
ready to be used in the gem or in a browser.
runtime/ contains opal's runtime written in javascript. It is not used
directly by the gem, but is built ready to use in the js contexts that
opal runs.
stdlib/ contains the stdlib files that opal comes packaged with. The
gem does use these, but only as required. Opal does not include the full
opal stdlib, and some parts are actually written in javascript for
optimal performance. These can be require() at runtime.
opal.js and opal-parser.js are included in the gem, but not the
source repo. They are the latest built versions of opal and its parser
which are built before the gem is published.