pdf_cover 0.2.4
Provides processors for both Carrierwave and Paperclip to allow having a version of a PDF attachment that is actually an image representing the first page on that PDF. This gem uses GhostScript, so it must be installed in order for it to work.
          Gemfile:
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          instalar:
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      Runtime Dependencies (1):
            rails
            >= 4.2
          
    Development Dependencies (15):
            activesupport
            >= 4.2
          
          
            appraisal
            >= 0
          
          
            awesome_print
            >= 0
          
          
            bundler
            ~> 1.11
          
          
            byebug
            >= 0
          
          
            carrierwave
            ~> 0.10
          
          
            coveralls
            >= 0
          
          
            fivemat
            >= 0
          
          
            paperclip
            = 4.1.1
          
          
            rake
            ~> 10.0
          
          
            rmagick
            ~> 2.13.2
          
          
            rspec
            ~> 3.0
          
          
            rubocop
            ~> 0.37.2
          
          
            simplecov
            >= 0
          
          
            sqlite3
            >= 0