The current force_activate always fails without Gemfile

Author: hsbt

lib/bundled_gems.rb

@@ -191,15 +191,18 @@ def self.build_message(name, level)
   end
 
   def self.force_activate(gem)
+    require "bundler"
     Bundler.reset!
 
     builder = Bundler::Dsl.new
-    if Bundler.definition.gemfiles.empty? # bundler/inline
-      Bundler.definition.locked_gems.specs.each{|spec| builder.gem spec.name, spec.version.to_s }
-    else
-      Bundler.definition.gemfiles.each{|gemfile| builder.eval_gemfile(gemfile) }
+    if Bundler::SharedHelpers.in_bundle?
+      if Bundler.definition.gemfiles.empty?
+        Bundler.locked_gems.specs.each{|spec| builder.gem spec.name, spec.version.to_s }
+      else
+        Bundler.definition.gemfiles.each{|gemfile| builder.eval_gemfile(gemfile) }
+      end
+      builder.gem gem
     end
-    builder.gem gem
 
     definition = builder.to_definition(nil, true)
     definition.validate_runtime!