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Legal Documentation

This document applies to TruffleRuby as built and distributed as the Native Standalone and JVM Standalone distributions, which are the only supported ways to use TruffleRuby.

TruffleRuby

TruffleRuby is copyright (c) 2013-2024 Oracle and/or its affiliates, and is made available to you under the terms of any one of the following three licenses:

  • Eclipse Public License version 2.0, or
  • GNU General Public License version 2, or
  • GNU Lesser General Public License version 2.1.

See epl-2.0.txt, gpl-2.txt, lgpl-2.1.txt.

MRI

The standard implementation of Ruby is MRI. TruffleRuby contains code from MRI version 3.3.5, including:

  • the standard library in lib/mri,
  • Ruby C extension API in lib/cext/include and src/main/c/cext,
  • C extensions in src/main/c/{bigdecimal,date,etc,io-console,nkf,openssl,psych,rbconfig-sizeof,ripper,syslog,zlib}

MRI is copyright Yukihiro Matsumoto. It is made available under the terms of the 2-clause BSD licence ruby-bsdl.txt, or a custom licence ruby-licence.txt.

Fourth-party code

MRI itself includes some third-party code that we have then included. This includes, but isn't limited to:

The general-purpose hash table library src/main/c/cext/st.c and lib/cext/include/ruby/st.h was written originally be Peter Moore and is public domain.

lib/cext/include/ccan/{build_assert,check_type,container_of,str} are all utilities from CCAN and are public domain or available under the terms of the CC0 public domain dedication, see ccan-cc0.txt.

lib/cext/include/ccan/list is a utility from CCAN and is available under the terms of 'BSD-MIT', see ccan-bsd-mit.txt. Despite the filename 'BSD-MIT' this is the conventional MIT licence.

RDoc Darkfish theme fonts under lib/mri/rdoc/generator/template/darkfish/ are available under the terms of the SIL Open Font License 1.1, see ofl.txt.

The header file lib/cext/include/ruby/onigmo.h is part of Onigmo, available under the same 2-clause BSD licence as Ruby.

RubyGems, in lib/mri/rubygems is available under the same custom licence as MRI, see ruby-licence.txt, or the MIT licence, see mit.txt.

The C implementation of YAML, src/main/c/psych/yaml is available under the MIT licence, see mit.txt.

JRuby

TruffleRuby contains code from JRuby 9.4.4.0, including Java implementation code, build system, shell script launchers, standard library modified from MRI, and so on.

Where original files had JRuby licence headers we have copied them over. In general this code is available under any of these licences:

  • Eclipse Public License version 2.0, or
  • GNU General Public License version 2, or
  • GNU Lesser General Public License version 2.1.

See epl-2.0.txt, gpl-2.txt, lgpl-2.1.txt.

Some libraries that were spun out of JRuby, such as ByteList, have been incorporated into our source code. These were under the same copyright and licence as JRuby in the first place, so we have considered them part of JRuby.

For historical information from JRuby, see jruby-copying.txt, but this will now be out of date.

Rubinius

TruffleRuby contains code from Rubinius 2.11, including core library implementation in src/main/ruby/truffleruby/core. This is in some cases copyright 2011 Evan Phoenix, and in other cases copyright 2007-2015 Evan Phoenix and contributors, and released under the 3-clause BSD license. We have included licence headers in these files which weren't in the original ones.

Some parts of the TruffleRuby Java code (such as the implementation of Rubinius primitives) are derived from Rubinius C++ code which is copyright 2007-2015, Evan Phoenix and contributors, and released under the 3-clause BSD license.

Some parts of the Ruby implementations of the standard library in lib/truffle are copyright 2013 Brian Shirai and are licensed under the 3-clause BSD license. In some cases this code is just code from MRI, and covered by their licence. In some cases we have modified this code.

Bundled gems

This list is from bundled_gems and grep licenses lib/gems/specifications/*.gemspec. Versions as used in MRI unless otherwise specified.

debug

debug is under the same copyright and licence as MRI (see ruby-bsdl.txt).

matrix

matrix is under the same copyright and licence as MRI (see ruby-bsdl.txt).

minitest

minitest is copyright Ryan Davis and is available under an MIT licence (see mit.txt).

net-ftp, net-imap, net-pop, net-smtp

These 4 bundled gems are under the same copyright and licence as MRI (see ruby-bsdl.txt).

power_assert

power_assert is copyright Kazuki Tsujimoto and is available under the same licence as MRI (see ruby-bsdl.txt).

prime

prime is under the same copyright and licence as MRI (see ruby-bsdl.txt).

racc

racc is under the same copyright and licence as MRI (see ruby-bsdl.txt).

rake

Rake is copyright Jim Weirich and is available under an MIT licence (see mit.txt).

rbs

rbs is copyright Soutaro Matsumoto and is available under the same licence as MRI (see ruby-bsdl.txt).

rexml

rexml is under the same copyright and licence as MRI (see ruby-bsdl.txt).

rss

rss is under the same copyright and licence as MRI (see ruby-bsdl.txt).

test-unit

test-unit is copyright Sutou Kouhei, Ryan Davis, and Nathaniel Talbott and is available under the same licence as MRI (see ruby-bsdl.txt).

typeprof

typeprof is copyright Yusuke Endoh and is available under an MIT licence (see mit.txt).

Other gems

json

The json gem is available under the same licence as MRI (see ruby-bsdl.txt).

RDoc

It's part of the standard library, not a bundled gem. RDoc is copyright Dave Thomas and Eric Hodel and is available under the terms of the GPL 2 (see gpl-2.txt), or the same custom licence as MRI (see ruby-licence.txt). Some other files in RDoc have different, but compatible, licences detailed in the files.

FFI

TruffleRuby includes parts of the FFI gem (version as described in lib/truffle/ffi/version.rb). The FFI gem is copyright 2008-2016, Ruby FFI project contributors, and covered by the three-clause BSD licence (see ffi.txt).

Prism

TruffleRuby uses the Prism Ruby parser (version as described in src/main/c/yarp/include/prism/version.h), copyright Shopify Inc. and is available under an MIT licence (see src/main/c/yarp/LICENSE.md).

Java dependencies

TruffleRuby has Java dependencies on these modules, which are then included in the distribution:

JOni

TruffleRuby uses JOni, version as described in mx.truffleruby/suite.py. JOni is copyright its authors and is released under an MIT licence (see mit.txt).

JCodings

TruffleRuby uses JCodings, version as described in Truffle's suite.py (select the correct branch/tag for finding the version used in a release). JCodings is copyright its authors and is released under an MIT licence (see mit.txt).

Patches

lib/patches contains patches to gems that are automatically applied when the gems are loaded, and contain third party code from those gems, with permissive licenses. We've added the licenses to the individual files.

lib/patches/stdlib patches code in the standard library.

Ruby Specs

We do not distribute MSpec or the Ruby Specs, but they are both copyright 2008 Engine Yard and are released under an MIT licence (see mit.txt).

FFI Specs

We do not distribute the FFI Specs, but they are copyright 2008-2014 Ruby-FFI contributors and are released under an MIT licence (see mit.txt).

Written offer for source code

For any software that you receive from Oracle in binary form which is licensed under an open source license that gives you the right to receive the source code for that binary, you can obtain a copy of the applicable source code by visiting http://www.oracle.com/goto/opensourcecode. If the source code for the binary was not provided to you with the binary, you can also receive a copy of the source code on physical media by submitting a written request to the address listed below or by sending an email to Oracle using the following link: http://www.oracle.com/goto/opensourcecode/request.

Oracle America, Inc.
Attn: Senior Vice President
Development and Engineering Legal
500 Oracle Parkway, 10th Floor
Redwood Shores, CA 94065

Your request should include:

  • The name of the binary for which you are requesting the source code
  • The name and version number of the Oracle product containing the binary
  • The date you received the Oracle product
  • Your name
  • Your company name (if applicable)
  • Your return mailing address and email, and
  • A telephone number in the event we need to reach you.

We may charge you a fee to cover the cost of physical media and processing.

Your request must be sent

  1. within three (3) years of the date you received the Oracle product that included the binary that is the subject of your request, or

  2. in the case of code licensed under the GPL v3 for as long as Oracle offers spare parts or customer support for that product model.