Ensure rdoc 8.0 installs succesfully on jruby

The new rdoc version, 8.0, depends on rbs. However, released rbs
versions do not install on jruby. The upcoming 4.1.0 release does. For
now pin rbs to the prerelease version so installation succeeds.

Author: mvz

Gemfile

@@ -4,6 +4,10 @@ source "https://rubygems.org"
 
 # Development dependencies
 group :development do
+  # Pin rbs to a version that installs on jruby.
+  # See https://github.com/ruby/rdoc/issues/1746
+  # TODO: Remove or adjust this once 4.1.0 is released
+  gem "rbs", "4.1.0.pre2", platforms: [:jruby]
   gem "sqlite3", ">= 1.4", "< 3.0", platforms: [:ruby]
 end
 

gemfiles/active_record_72.gemfile

@@ -9,6 +9,7 @@ gem "activesupport", "~> 7.2.0", require: "active_support"
 
 group :development do
   gem "activerecord-jdbcsqlite3-adapter", "~> 72.0", platforms: [:jruby]
+  gem "rbs", "4.1.0.pre2", platforms: [:jruby]
   gem "sqlite3", "~> 2.0", platforms: [:ruby]
 end
 

gemfiles/active_record_80.gemfile

@@ -8,6 +8,7 @@ gem "activerecord", "~> 8.0.0", require: "active_record"
 gem "activesupport", "~> 8.0.0", require: "active_support"
 
 group :development do
+  gem "rbs", "4.1.0.pre2", platforms: [:jruby]
   gem "sqlite3", "~> 2.0", platforms: [:ruby]
 end
 

gemfiles/active_record_81.gemfile

@@ -8,6 +8,7 @@ gem "activerecord", "~> 8.1.0", require: "active_record"
 gem "activesupport", "~> 8.1.0", require: "active_support"
 
 group :development do
+  gem "rbs", "4.1.0.pre2", platforms: [:jruby]
   gem "sqlite3", "~> 2.0", platforms: [:ruby]
 end