fix(ruby): Require shared lib from correct subdir

.github/workflows/publish.yml

@@ -175,7 +175,7 @@ jobs:
             -- ${{ matrix._.rb-sys-dock-setup }}
 
       - name: Smoke gem install
-        if: matrix.ruby-platform == 'x86_64-linux' # GitHub actions architecture
+        if: matrix._.platform == 'x86_64-linux' # GitHub actions architecture
         run: |
           gem install pkg/eppo-server-sdk-*.gem --verbose
           script="puts EppoClient::Core::Client.new(EppoClient::Config.new('placeholder'))"

.gitignore

@@ -16,3 +16,4 @@
 node_modules
 
 .idea/
+.DS_Store

ruby-sdk/lib/eppo_client/client.rb

@@ -4,7 +4,14 @@
 require "logger"
 
 require_relative "config"
-require_relative "eppo_client"
+
+# Tries to require the extension for the current Ruby version first
+begin
+  RUBY_VERSION =~ /(\d+\.\d+)/
+  require_relative "#{Regexp.last_match(1)}/eppo_client"
+rescue LoadError
+  require_relative "eppo_client"
+end
 
 module EppoClient
   # The main client singleton
@@ -15,7 +22,7 @@ class Client
     def init(config)
       config.validate
 
-      if !@core.nil? then
+      if !@core.nil?
         STDERR.puts "Eppo Warning: multiple initialization of the client"
         @core.shutdown
       end