✅ Skip simplecov for non-CRuby engines

Author: nevans

.github/workflows/test.yml

@@ -36,7 +36,8 @@ jobs:
       timeout-minutes: 5 # _should_ finish in under a minute
 
     - uses: joshmfrankel/simplecov-check-action@main
-      if: matrix.os == 'ubuntu-latest' && github.event_name != 'pull_request'
+      if: ${{ matrix.os == 'ubuntu-latest' && github.event_name != 'pull_request' &&
+        !startsWith(matrix.ruby, 'truffleruby') && !startsWith(matrix.ruby, 'jruby') }}
       with:
         check_job_name: "SimpleCov - ${{ matrix.ruby }}"
         minimum_suite_coverage: 90

Gemfile

@@ -19,7 +19,7 @@ gem "benchmark-driver", require: false
 gem "vernier", require: false, platform: :mri
 
 group :test do
-  gem "simplecov",        require: false
-  gem "simplecov-html",   require: false
-  gem "simplecov-json",   require: false
+  gem "simplecov",        require: false, platform: :mri
+  gem "simplecov-html",   require: false, platform: :mri
+  gem "simplecov-json",   require: false, platform: :mri
 end

test/lib/helper.rb

@@ -1,4 +1,6 @@
-unless ENV["SIMPLECOV_DISABLE"] in /\A(1|y(es)?|t(rue)?)\z/i
+if !(ENV["SIMPLECOV_DISABLE"] in /\A(1|y(es)?|t(rue)?)\z/i) &&
+    RUBY_ENGINE == "ruby" # C Ruby only
+
   require "simplecov"
 
   # Cannot use ".simplecov" file: simplecov-json triggers a circular require.