Ruby License

Source: Wikipedia, the free encyclopedia.
Ruby License
Author
GPL compatible
Yes[2]
CopyleftNo
Linking from code with a different licenceYes

The Ruby License is a Free and Open Source license applied to the

GNU General Public Licence v2, or the two-clause BSD License
(depending on the version of the Ruby License used).

The license is typically considered to be a

free software license
due to the presence of the dual-licensing clause.

History

For versions up to 1.9.2, the Ruby programming language was available under an explicit dual-licence scheme which allowed users to choose between a dedicated Ruby licence or the

GNU General Public Licence
v2 (GPLV2), which is one of the most common free software licences.

Starting at version 1.9.3, the dual-licensing clause changed to offer the choice of the FreeBSD License.

Compatibility

The Ruby License has unusual

Public Domain or otherwise Freely Available". For example, a modified form of a program licensed under the Ruby license may be placed under the FreeBSD License
, which is a non copyleft license.

The Ruby License is approved by the

The Open Source Initiative does not explicitly include the Ruby license as a certified an open source license; this is considered "unnecessary" due to the dual licensing clause.[3]

In discussion over the change of the dual licensing clause on the debian-legal mailing list, it was noted that while the Ruby license itself is arguably not compatible with the Debian Free Software Guidelines, this is unimportant due to the dual-licensing clause.[4]

Software under Ruby license (including the older version when GPLv2 was a listed alternative Ruby 1.9.2 license) may be included in binary form within an Apache product if the inclusion is appropriately labeled.[5]

Adoption

Software other than the

Ruby programming language
itself which uses the Ruby License includes:

  • JRuby, an implementation of Ruby atop the Java Virtual Machine
  • MacRuby, an implementation of Ruby 1.9 directly on top of Mac OS X core technologies such as the Objective-C runtime and garbage collector, the LLVM compiler infrastructure and the Foundation and ICU frameworks. MacRuby contains code from the Ruby project [6] and the source code of the most MacRuby examples, unless specified, are covered by the Ruby license.[7]
  • RubyGems, a package manager for Ruby
  • IronRuby, an implementation of Ruby targeting the .NET Framework
  • The JSON implementation for Ruby[8]

References

  1. ^ "Debian - License information". Debian Foundation. Retrieved 2013-11-09.
  2. ^ a b "Various Licenses and Comments about Them". GNU Foundation.
  3. ^ Johnson, David (2002-02-03). "Ruby license". license-discuss (Mailing list). Retrieved 2020-05-17.
  4. ^ "Re: License check: Ruby 1.9.3".
  5. ^ "ASF Legal Previously Asked Questions". www.apache.org.
  6. ^ "MacRuby/MacRuby". GitHub. 14 February 2022.
  7. ^ "MacRuby/MacRubySamples". GitHub. May 2021.
  8. ^ "JSON implementation for Ruby". flori.github.io.
  • Text of the Ruby License