Add early-return so that Vernier::Profiler won't be defined if vernie…

…r is not bundled

sentry-ruby/lib/sentry/vernier/profiler.rb

@@ -7,6 +7,7 @@
 begin
   require "vernier"
 rescue LoadError
+  return
 end
 
 module Sentry
@@ -22,7 +23,7 @@ def initialize(configuration)
         @started = false
         @sampled = nil
 
-        @profiling_enabled = defined?(Vernier) && configuration.profiling_enabled?
+        @profiling_enabled = configuration.profiling_enabled?
         @profiles_sample_rate = configuration.profiles_sample_rate
         @project_root = configuration.project_root
         @app_dirs_pattern = configuration.app_dirs_pattern

sentry-ruby/spec/sentry/rack/capture_exceptions_spec.rb

@@ -706,10 +706,13 @@ def will_be_sampled_by_sdk
       expect(profile[:transaction][:trace_id]).to eq(event.contexts[:trace][:trace_id])
 
       thread_id_mapping = {
-        Sentry::Profiler => "0",
-        Sentry::Vernier::Profiler => Thread.current.object_id.to_s
+        Sentry::Profiler => "0"
       }
 
+      if defined?(Sentry::Vernier::Profiler)
+        thread_id_mapping[Sentry::Vernier::Profiler] = Thread.current.object_id.to_s
+      end
+
       expect(profile[:transaction][:active_thread_id]).to eq(thread_id_mapping[Sentry.configuration.profiler_class])
 
       # detailed checking of content is done in profiler_spec,
@@ -734,7 +737,7 @@ def will_be_sampled_by_sdk
       let(:app) do
          ->(_) do
           [200, {}, "ok"]
-        end
+         end
       end
 
       let(:stackprof_results) do

sentry-ruby/spec/sentry/vernier/profiler_spec.rb

@@ -2,8 +2,8 @@
 
 require "sentry/vernier/profiler"
 
-RSpec.describe Sentry::Vernier::Profiler, when: { ruby_version?: [:>=, "3.2.1"] } do
-  subject(:profiler) { described_class.new(Sentry.configuration) }
+RSpec.describe "Sentry::Vernier::Profiler", when: { ruby_version?: [:>=, "3.2.1"] } do
+  subject(:profiler) { Sentry::Vernier::Profiler.new(Sentry.configuration) }
 
   before do
     # TODO: replace with some public API once available