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The Mirah Programming Language

branch: master
= mirah



Mirah is a customizable programming language featuring static types,
local type inference and a heavily Ruby-inspired syntax. Mirah
currently includes a typer/compiler backend for the JVM which can
output either JVM bytecode or Java source files.


* Ruby syntax
* Compiles to .class or .java
* Fast as Java


mirah <script.mirah>
mirah -e "inline script"
mirahc <script.mirah>
mirahc -e "inline script" # produces DashE.class
mirahc -java <script.mirah>
mirahc -java -e "inline script" # produces


* JRuby 1.5.0 or higher.
* BiteScript 0.0.5 or higher


If your gem and rake are not from from JRuby, prefix the commands with jruby -S

$ gem install mirah

To build and install from source,

$ git clone
$ git clone
$ cd bitescript
$ gem build bitescript.gemspec
$ gem install bitescript-*
$ cd -
$ cd mirah
$ rake gem
$ gem install pkg/mirah-*
$ cd -

== For Java tools:

To build the Mirah jars from source you should have a checkout of both jruby and
bitescript in Mirah's parent directory. Run "ant jar-complete" in jruby, then in
the mirah directory "../jruby/bin/jruby -S rake jar" to build the Mirah jar. Use
"jar:complete" instead to produce a free-standing jar file with JRuby and the
JRubyParser libraries included.
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