Using upgradinate to upgrade from Ruby 1.8.7(REE) to 1.9.3.

example_gemfile_snippet.rb

  gem 'fast_rake'
  gem 'nokogiri-diff'
  gem 'rcov', '~> 0.9.11' # RUBY 187
  # RUBY 193 gem 'simplecov'
  # RUBY 193 gem 'ehrenmurdick-git-pair'
  # RUBY 193 gem 'debugger'
  gem 'net-ping'

  platform :ruby_18 do # These are problematic in ruby 1.9                                     # RUBY 187
    gem 'system_timer' # Remove this from guardfile when we upgrade (in favor of native timer) # RUBY 187
    gem 'ruby-debug'                                                                           # RUBY 187
  end                                                                                          # RUBY 187

  platform :ruby_19 do # RUBY 187
    gem 'ruby-debug19' # RUBY 187
  end                  # RUBY 187
end

group :deployment do
  gem 'lp_on_rails', :require => nil
end

ree.rb

#!/usr/bin/env ruby

# USAGE:
# - Run upgradinate from source project
# - cd into new project 
# - run build fix breakages
# - backport them into source project
# - Rinse/Repeat

Dir.glob("#{File.dirname(__FILE__)}/lib/*", &method(:load))

@atlas = '/Users/dev/projects/atlas/atlas'
@atlas193 = '/Users/dev/projects/atlas/atlas193'
@babushka = '/Users/dev/.babushka/deps'
@babushka193 = '/Users/dev/.babushka/deps193'

def usage
  puts <<-USAGE
upgradinate.rb upgrades Atlas, Christo, API and Krishna code to run on
Ruby 1.9.3.

NOTE: this script upgradinates files under:

  #{@atlas193}
  #{@babushka193}

usage: ruby script/upgradinate/ree.rb [--help]
  USAGE
end

def quality_check(path)
  if system("grep '# RUBY' #{path}/* -ilR --exclude-dir=#{@atlas193}/script/upgradinate --exclude-dir=#{@atlas193}/target/reports --exclude-dir=#{@atlas193}/tmp")
    raise 'The above files have not been Upgradinated!'
  end
end

def upgradinate
  puts "Removing #{@atlas193}"
  `rm -fr #{@atlas193}`
  puts "Copying #{@atlas} to #{@atlas193}"
  `cp -r #{@atlas}/ #{@atlas193}/`
  `cp -r #{@babushka}/ #{@babushka193}/`

  puts "removing coverage records, so that we don't fail based on that"
  `find #{@atlas193} -name ".last_run.json" | xargs rm`

  puts 'Upgradinating files in atlas193 directory'
  upgradinate_files [
    "#{@atlas193}/Gemfile",
    "#{@atlas193}/app/controllers/ui/admin/place_inventory_controller.rb",
    "#{@atlas193}/app/controllers/ui/merge_pois_controller.rb",
    "#{@atlas193}/app/models/content_section.rb",
    "#{@atlas193}/app/models/export/file_path.rb",
    "#{@atlas193}/app/models/export/export_report.rb",
    "#{@atlas193}/app/models/odt_author_pack_export.rb",
    "#{@atlas193}/app/models/odt_metadata.rb",
    "#{@atlas193}/app/models/product.rb",
    "#{@atlas193}/app/models/report/csv_report.rb",
    "#{@atlas193}/app/views/api/books/index.xml.erb",
    "#{@atlas193}/config/application.rb",
    "#{@atlas193}/config/database.yml",
    "#{@atlas193}/config/roodi.yml",
    "#{@atlas193}/lib/atlas_poi_linker.rb",
    "#{@atlas193}/lib/core_ext/string.rb",
    "#{@atlas193}/lib/generators/import_place_shapes/import_place_shapes_generator.rb",
    "#{@atlas193}/lib/poi_csv_export.rb",
    "#{@atlas193}/lib/tasks/fast.rake",
    "#{@atlas193}/lib/tasks/rspec.rake",
    "#{@atlas193}/rubyversion",
    "#{@atlas193}/script/upgradinate/lib/file-helper.rb",
    "#{@atlas193}/spec/controllers/ui/admin/place_inventory_controller_spec.rb",
    "#{@atlas193}/spec/lib/atlas_poi_linker_spec.rb",
    "#{@atlas193}/spec/lib/core_ext/string_spec.rb",
    "#{@atlas193}/spec/lib/poi_csv_export_spec.rb",
    "#{@atlas193}/spec/spec_helper.rb",
    "#{@atlas193}/lib/acml/fragment_parser.rb",
    "#{@atlas193}/spec/lib/acml/migrator_behaviour.rb",
    "#{@babushka193}/apache.rb",
    "#{@babushka193}/bootstrap.sh",
    "#{@babushka193}/gems.rb",
    "#{@babushka193}/ruby_versions.rb",
    "#{@babushka193}/rvm.rb",
    "#{@babushka193}/textmate.rb",
  ]

  FileUtils.rm_f [
    "#{@atlas193}/config/initializers/undefine_deprecated_object_methods.rb"
  ]

  quality_check @atlas193
  quality_check @babushka193

  puts 'Done'
end

if ARGV.include?('--help') || ARGV.include?('-h') || ARGV.include?('/?')
  usage
else
  upgradinate
end