Test for possible version mismatches of base64 (stdlib) gem

base64 is part of the ruby stdlib https://stdgems.org/base64/.
Rubocop adds it now as a gem dependency since it gets removed
from the stdlib with ruby 3.4 rubocop/rubocop#12094.
The introduced version of base64 matches the one of our
currently used ruby version (3.1.4). We have to make sure
that the version that now is included to our bundle does not
mismatch in the future due to possible introduced updates.

.circleci/conditional_config.yml

@@ -9,7 +9,7 @@ parameters:
     type: boolean
     default: false
 
-  run-passenger-tests:
+  run-passenger-and-ruby-default-gem-tests:
     type: boolean
     default: false
 
@@ -309,7 +309,7 @@ jobs:
             bundle exec rake db:seed
             bundle exec rake data:migrate
 
-  passenger_tests:
+  passenger_and_default_gem_tests:
     docker:
       - <<: *frontend_base
     steps:
@@ -320,6 +320,7 @@ jobs:
           command: |
             make -C src/api test_rake
             make -C src/api test_rack
+            make -C src/api test_base64_gem
 
   spider:
     parallelism: 2
@@ -502,11 +503,11 @@ workflows:
           requires:
             - checkout_code
 
-  passenger_tests:
-    when: << pipeline.parameters.run-passenger-tests >>
+  passenger_and_ruby_default_gem_tests:
+    when: << pipeline.parameters.run-passenger-and-ruby-default-gem-tests >>
     jobs:
       - checkout_code
-      - passenger_tests:
+      - passenger_and_ruby_default_gem_tests:
           requires:
             - checkout_code
 
@@ -556,4 +557,3 @@ workflows:
       - feature:
           requires:
             - linters
-

.circleci/config.yml

@@ -20,7 +20,7 @@ workflows:
             src/api/app/(views|components)/.* run-haml-linter true
             src/api/vendor/cache/haml.* run-haml-linter true
             src/api/db/.* run-migrations-tests true
-            src/api/Gemfile.lock run-passenger-tests true
+            src/api/Gemfile.lock run-passenger-and-ruby-default-gem-tests true
             src/api/app/assets/javascripts/.* run-javascripts-linter true
             src/api/public/apidocs-new/.* run-apidocs-linter true
           base-revision: master

src/api/Makefile

@@ -82,6 +82,11 @@ test_rack:
 	$(eval BUNDLE_RACK_VERSION:=$(shell basename `bundle show rack`))
 	@if [ "$(SYSTEM_RACK_VERSION)" != "$(BUNDLE_RACK_VERSION)" ]; then echo "rack version mismatch! System: $(SYSTEM_RACK_VERSION) / Bundle: $(BUNDLE_RACK_VERSION)"; exit 1; fi
 
+test_base64_gem:
+	$(eval RUBY_DEFAULT_BASE64_VERSION:=$(shell gem list --local base64 | grep -Po 'default:\s\K[0-9]\.[0-9]\.[0-9]+'))
+	$(eval BUNDLE_BASE64_VERSION:=$(shell bundle show base64 | xargs basename | grep -Eo '[0-9]\.[0-9]\.[0-9]+'))
+	@if [ "$(RUBY_DEFAULT_BASE64_VERSION)" != "$(BUNDLE_BASE64_VERSION)" ]; then echo "base64 version mismatch! System Ruby Default: $(RUBY_DEFAULT_BASE64_VERSION) / Bundle: $(BUNDLE_BASE64_VERSION)"; exit 1; fi
+
 clean:
 	rm -rf ../../docs/api/html