NameError: uninitialized constant Builder

[okliv]

rails 4.1.8
ruby 2.2.1

#config/sitemap.rb

SitemapGenerator::Sitemap.default_host = 'http://...'

SitemapGenerator::Sitemap.create do

...
#row 27
  add '/contacts', :changefreq => 'weekly'

end

if i run

$ RAILS_ENV=production rake sitemap:refresh

i receive

NameError: uninitialized constant Builder
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/builder/sitemap_url.rb:72:in `to_xml'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/builder/sitemap_file.rb:102:in `add'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/link_set.rb:429:in `add_default_links'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/link_set.rb:145:in `add'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/interpreter.rb:31:in `add'
.../config/sitemap.rb:27:in `block in run'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/interpreter.rb:59:in `instance_eval'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/interpreter.rb:59:in `eval'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/link_set.rb:40:in `create'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator.rb:42:in `method_missing'
/.../config/sitemap.rb:4:in `run'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/interpreter.rb:76:in `instance_eval'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/interpreter.rb:76:in `run'
/.../.rvm/gems/ruby-2.2.1@gemset/bundler/gems/sitemap_generator-028251269d39/lib/sitemap_generator/tasks.rb:51:in `block (2 levels) in <top (required)>'

google didn't help, gem version switches - too (tried 5.1.0, 5.0.5, 4.3.1), all hope is in you =)

(builder gem version is 3.2.2)

thank you

[okliv]

i found the reason but do not know how to fix it (yet)

it conflicts with https://github.com/andrad/alphasms-api (if i comment it out, sitemap generates as expected)

and now i need to figure out what gem causing this, actually

[okliv]

ahm... mystic

here https://github.com/andrad/alphasms-api/tree/master/lib/alphasms

i have renamed file and all gem-internal references for builder.rb to something else (buildr.rb) and problem just gone :/

closing issue