jruby · headius · Oct 11, 2025 · Aug 8, 2022 · Jun 8, 2021 · Oct 9, 2025
diff --git a/lib/warbler/gems.rb b/lib/warbler/gems.rb
@@ -52,8 +52,6 @@ def specs(gem_dependencies)
     # Add a single gem to WEB-INF/gems
     def find_single_gem_files(gem_dependencies, gem_pattern, version = nil)
       gem_spec_class = Gem::Specification
-      gem_spec_class = Gem::BasicSpecification if Gem.const_defined?(:BasicSpecification)
-      # Gem::Specification < Gem::BasicSpecification (since RGs 2.1)
       case gem_pattern
       when gem_spec_class
         return BundlerHelper.to_spec(gem_pattern)

diff --git a/lib/warbler/templates/bundler.erb b/lib/warbler/templates/bundler.erb
@@ -2,18 +2,3 @@ ENV['BUNDLE_WITHOUT'] = '<%= config.bundle_without.join(':') %>'
 <% if config.bundler[:frozen] -%>
 ENV['BUNDLE_FROZEN'] = '1'
 <% end -%>
-
-module Bundler
-  module Patch
-    def clean_load_path
-      # nothing to be done for embedded JRuby
-    end
-  end
-  module SharedHelpers
-    def included(bundler)
-      bundler.send :include, Patch
-    end
-  end
-end
-
-require 'bundler/shared_helpers'
diff --git a/lib/warbler/templates/jar.erb b/lib/warbler/templates/jar.erb
@@ -9,3 +9,5 @@ ENV['GEM_PATH'] = nil # RGs sets Gem.paths.path = Gem.default_path + [ GEM_HOME
 <% if config.bundler && config.bundler[:gemfile_path] -%>
 ENV['BUNDLE_GEMFILE'] = File.expand_path(File.join('..', '..', '<%= config.bundler[:gemfile_path] %>'), __FILE__)
 <% end -%>
+<%# Ensure any cached paths are cleared; otherwise behaviour can be indeterminate if the paths have already been read %>
+# Gem.clear_paths
diff --git a/lib/warbler/templates/war.erb b/lib/warbler/templates/war.erb
@@ -1,10 +1,5 @@
 if $servlet_context.nil?
   ENV['GEM_HOME'] <%= config.override_gem_home ? '=' : '||=' %> File.expand_path(File.join('..', '..', '<%= config.gem_path %>'), __FILE__)
-<% if config.override_gem_home -%>
-<% # GEM_HOME/GEM_PATH are set as .war gets extracted (on java -jar ...)
-   # ... thus setting `ENV['GEM_PATH'] = nil` would cause a boot failure
--%>
-<% end -%>
 <% if config.bundler && config.bundler[:gemfile_path] -%>
   ENV['BUNDLE_GEMFILE'] ||= File.expand_path(File.join('..', '..', '<%= config.bundler[:gemfile_path] %>'), __FILE__)
 <% end -%>
@@ -17,3 +12,5 @@ else
   ENV['BUNDLE_GEMFILE'] ||= $servlet_context.getRealPath('/<%= config.bundler[:gemfile_path] %>')
 <% end -%>
 end
+<%# Ensure any cached paths are cleared; otherwise behaviour can be indeterminate if the paths have already been read %>
+Gem.clear_paths
diff --git a/spec/rails7_stub/Gemfile.lock b/spec/rails7_stub/Gemfile.lock
@@ -190,6 +190,7 @@ GEM
 PLATFORMS
   universal-java-1.8
   universal-java-21
+  universal-java-8
 
 DEPENDENCIES
   activerecord-jdbcpostgresql-adapter (~> 70.0)

diff --git a/spec/sample_bundler/Gemfile.lock b/spec/sample_bundler/Gemfile.lock
@@ -6,6 +6,7 @@ GEM
 PLATFORMS
   universal-java-1.8
   universal-java-21
+  universal-java-8
 
 DEPENDENCIES
   rake (= 13.3.0)