From 1998 to 2007, the Unicode Consortium maintained a library called CVTUTF. In 2009, CVTUTF was removed from unicode.org, and the Unicode Consortium said that every version of CVTUTF had bugs, and that folks should use the ICU library instead.
CVTUTF was under a custom license that was not Free under the FSF's definition, not Open Source under the OSI's definition, and not GPL-compatible. The Ruby stdlib JSON gem uses code taken-from/based-on CVTUTF. This has caused much consternation among folks who care about any of those 3 things.
We have submitted a PR to the upstream JSON gem to replace this non-Free code with Free code, however it is not yet merged. In the mean-time GNU/Linux distros need Free versions of the JSON gem so that they can ship Ruby. This repository maintains several such versions of the gem, for different Ruby versions.
| Bundled in | JSON version | Parabola support until |
|---|---|---|
| Ruby 1.9.0 | JSON 1.1.2 - 1.1.3 | - |
| Ruby 1.9.1 | JSON 1.1.3 - 1.1.4 | - |
| Ruby 1.9.2 | JSON 1.4.2 | - |
| Ruby 1.9.3 | JSON 1.5.3-29-gf7f7889 - 1.5.5 | - |
| Ruby 2.0 | JSON 1.7.5 - 1.7.7 | - |
| Ruby 2.1 | JSON 1.8.1 | - |
| Ruby 2.2 | JSON 1.8.1 - 1.8.1.1 | - |
| Ruby 2.3 | JSON 1.8.3 - 1.8.3.1 | - |
| Ruby 2.4 | JSON 2.0.2 - 2.0.4 | - |
| Ruby 2.5 | JSON 2.1.0 | - |
| Ruby 2.6 | JSON 2.1.0 | - |
| Ruby 2.7 | JSON 2.3.0 | TBD |
| Ruby 3.0 | JSON 2.5.1 | 2024-08 |
| Ruby 3.1 | JSON 2.6.1 | - |
| Ruby 3.2 | JSON 2.6.3 | Whenever Ruby 3.4.0 comes out |
| Ruby 3.3 | JSON 2.7.1 | - |
| Ruby 3.4 (.0.preview1) | JSON 2.7.2 | TBD |
| JSON base version | status | vanilla LTS branch | liberated branch |
|---|---|---|---|
| JSON 2.3.0 | active (for Ruby 2.7) | lts/v2.3.0/vanilla  |
lts/v2.3.0/no-cvtutf  |
| JSON 2.6.3 | active (for Ruby 3.2) | lts/v2.6.3/vanilla  |
lts/v2.6.3/no-cvtutf  |
| JSON 2.7.1 | inactive | lts/v2.7.1/vanilla  |
lts/v2.7.1/no-cvtutf  |
JSON master |
active (for PR) | - | lukeshu/no-cvtutf  |
| Date | Version | Ruby (vendored) | JSON (standalone) |
|---|---|---|---|
| 2024-02-22 | v2.7.1-1.parabola1 |
Git tag: ruby-3.0.6-libre1tarball: ruby-3.0.6-libre1.tar.gz |
Git tag: v2.7.1-1.parabola1tarball: 6e75be6….tar.gz |
| 2024-05-15 | v2.3.0-20-gb67679c |
Git tag: ruby-2.7.8-libre1tarball: ruby-2.7.8-libre1.tar.gz |
tarball: b67679c….tar.gz |
| 2024-08-31 | v2.6.3-8-g4bcec6c |
Git tag: ruby-3.2.5-libre1tarball: ruby-3.2.5-libre1.tar.gz |
tarball: 4bcec6c….tar.gz |