Update the Compatibility Policy

koic · bbatsov · commit 996c6be4b19a · 2024-01-22T23:21:28.000+02:00
This PR proposes to update the Compatibility Policy. There are major version incompatibilities between Ruby 2.7 and Ruby 3.0. And the latest stable version of Ruby on Rails, 7.1, still supports Ruby 2.7. So, dropping support for Ruby 2.7 from RuboCop might be premature for the market at this stage. At least for the duration that Rails 7.1 is classified as being in the "Bug Fix" phase under the [Maintenance Policy for Ruby on Rails] (https://guides.rubyonrails.org/maintenance_policy.html), RuboCop will continue to support Ruby 2.7. In reality, RuboCop is mostly used for code analysis with the same version of the Ruby runtime. I think that ensuring such users can smoothly upgrade their RuboCop version justifies maintaining support for older Ruby version 2.7 for an extended period.
diff --git a/docs/modules/ROOT/pages/compatibility.adoc b/docs/modules/ROOT/pages/compatibility.adoc
@@ -13,8 +13,9 @@ NOTE: RuboCop might be working with other Ruby implementations as well, but it's
 
 == Support Matrix
 
-RuboCop generally aims to follow MRI's own support policy - meaning RuboCop would support all officially supported MRI releases.footnote:[Typically the last 3 releases.] To give people extra time for a smooth transition, we've customarily provided support for about one year after EOL of MRI version.
-This means that if Ruby 2.7 reaches its EOL in Spring 2023, it would be supported by RuboCop (at least) until Spring 2024.footnote:[At the core team's discretion this policy might be waived aside for MRI releases causing significant maintenance overhead.]
+RuboCop generally aims to follow MRI's own support policy - meaning RuboCop would support all officially supported MRI releases.footnote:[Typically the last 3 releases.] To give people extra time for a smooth transition, we've customarily provided support for about one year after EOL of MRI version. footnote:[At the core team's discretion this policy might be waived aside for MRI releases causing significant maintenance overhead.]
+
+NOTE: There are major version incompatibilities between Ruby 2.7 and Ruby 3.0, and the latest stable version of Ruby on Rails, 7.1, still supports Ruby 2.7. Therefore, it might be early for RuboCop to drop support for Ruby 2.7 at this stage. As long as Rails 7.1 is in the "Bug Fix" phase of the https://guides.rubyonrails.org/maintenance_policy.html[Maintenance Policy for Ruby on Rails], RuboCop will continue supporting Ruby 2.7.
 
 The following table is the runtime support matrix.
 
