Adding a setup routine with setup.rb

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Ruby

Hello coders,

actually i'm trying to add a setup routine to a Ruby project.

I have a structure like:
/
/bin
/bin/latexcv.rb
/lib
/lib/[the used libraries]
/data
/data/Appendix
/data/Resume
/data/Cover

My main class runs:

FileUtils.cd('data/Cover') do
      Cover.create_cover
    end

After running the setup.rb and launching my binary it loads the method and gives me back:

/home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/fileutils.rb:127:in `chdir': No such file or directory @ dir_chdir - data/Cover (Errno::ENOENT)
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/fileutils.rb:127:in `cd'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/latex_curriculum_vitae.rb:20:in `block in <class:LatexCurriculumVitae>'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/fileutils.rb:127:in `chdir'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/fileutils.rb:127:in `cd'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/latex_curriculum_vitae.rb:12:in `<class:LatexCurriculumVitae>'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/latex_curriculum_vitae.rb:11:in `<top (required)>'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/sascha/.rvm/rubies/ruby-2.2.1/bin/latexcv.rb:3:in `<main>'

Maybe anyone knows why it breaks?

The full project can be shown there:https://github.com/saigkill/latex_curriculum_vitae[^]