ruby-environment.rb

dep('ruby environment', :global_ruby_versions){
  requires [
    'rvm with multiple rubies',
    'required.rubies_installed'.with(global_ruby_versions),
    'bundler.global_gem'.with(global_ruby_versions),
    'popular gems installed'
  ]
}

dep('required.rubies_installed', :ruby_versions) {
  rubies *ruby_versions.to_s.split(',').map(&:chomp)
}

# Install the latest version of bunder.
# We typically keep this in sync with what Heroku is using on Cedar.
dep("bundler.global_gem", :ruby_versions) {
  rubies *ruby_versions.to_s.split(',').map(&:chomp)
  versions "1.1.3"
}

# This automatically installs the last 10 versions of popular gems
# in order to speed up ruby dependency installation.

# Wrap everything in a lambda so that we can lazily load it later
# (This process currently doesn't work due to the way babs works)
# NOTE: We can probably just lazily eval the version lookup later.

#
# load_gems = lambda {
#   require "rubygems"
#   require 'json'
#   require 'net/http'
# 
#   # Create an array of common gems which can be added to later very easily.
#   # The syntax is gemname:<array start index>,<array end index>
#   #
#   # Basically the API call to rubygems below returns an array of version numbers,
#   # and because some of these are just way too outdated to be useful we might only want
#   # to install the last 5 or 10 releases, which is what the numbers are the : are restricting.
#   #
#   # e.g. rails:0,5 will return rails 3.1.2, 3.1.1, 3.1.0, 3.0.11, 3.0.10
#   #
#   gems = %w(
#   typhoeus
#   pg
#   mysql2
#   sqlite3:0,1
#   gherkin
#   nokogiri
#   therubyracer
#   rails
#   rake
#   timecop
#   shoulda
#   rdoc
#   rubigen
#   metaclass
#   json
#   rest-client
#   multi_json
#   faraday
#   faraday_middleware
#   airbrake
#   validates_timeliness
#   unicorn
#   uglifier
#   timeliness
#   thin
#   state_machine
#   simple_form
#   sass-rails
#   resque
#   sinatra
#   minitest
#   minitest-matchers
#   ruby-progressbar
#   mongrel
#   kaminari
#   jquery-rails:0,2
#   inherited_resources
#   responders
#   heroku
#   eventmachine:0,3
#   delorean
#   journey:0,1
#   ).reverse
# 
#   # Returns an array of dep names
#   gem_requires = gems.map do |gem_name|
#     puts "---> Fetching gem versions for #{gem_name}"
# 
#     # Split gem name on :
#     if gem_name.include?(':')
#       version_range = gem_name.split(':',2).last.split(',').map(&:strip).map(&:to_i)
#       gem_name = gem_name.split(':').first
#     else
#       # If no version range was supplied in the name, default here.
#       version_range = [0,10]
#     end
# 
#     # Load gem versions from rubygems.org API
#     gem_versions = JSON.parse(Net::HTTP.get("rubygems.org", "/api/v1/versions/#{gem_name}.json")).
#       # Skip prerelease gems
#       select {|gem| gem['prerelease'] == false }.
#       # Restrict to MRI
#       select {|gem| gem['platform'] == 'ruby' }.
#       map {|gem| gem['number']}
# 
#     gem_versions = gem_versions[*version_range]
# 
#     unless gem_versions.empty?
#       dep("#{gem_name}.global_gem") {
#         # Install for MRI only at this stage
#         # TODO: Use rubygems designated platform for ruby VM
#         # e.g. ruby = MRI, jruby = JRUBY
#         rubies *%w(1.8.7 1.9.2 1.9.3)
#         # Pass gem versions array to dep argument
#         versions *gem_versions
#       }
#       puts "     Defined dep '#{gem_name}.global_gem'"
#     end
#     # Return dep name
#     "#{gem_name}.global_gem"
#   end
# 
#   gem_requires
# }
# 
# # Eval gem lambda
# gem_deps = instance_eval(&load_gems)
# 
# # Create a dep which requires all of the above.
# dep('latest versions of popular gems'){
#   requires *gem_deps
# }
# 
# 
# gems = %w(
#   typhoeus
#   pg
#   mysql2
#   sqlite3:0,1
#   gherkin
#   nokogiri
#   therubyracer
#   rails
#   rake
#   timecop
#   shoulda
#   rdoc
#   rubigen
#   metaclass
#   json
#   rest-client
#   multi_json
#   faraday
#   faraday_middleware
#   airbrake
#   validates_timeliness
#   unicorn
#   uglifier
#   timeliness
#   thin
#   state_machine
#   simple_form
#   sass-rails
#   resque
#   sinatra
#   minitest
#   minitest-matchers
#   ruby-progressbar
#   mongrel
#   kaminari
#   jquery-rails:0,2
#   inherited_resources
#   responders
#   heroku
#   eventmachine:0,3
#   delorean
#   journey:0,1
# ).reverse

dep('popular gems installed') {
  requires %w(
    pg.gem_installed
    rails.gem_installed
    mysql2.gem_installed
    airbrake.gem_installed
    heroku.gem_installed
    uglifier.gem_installed
    json.gem_installed
    unicorn.gem_installed
    typhoeus.gem_installed
    therubyracer.gem_installed

  )
}

dep('pg.gem_installed') { rubies "1.8.7", "1.9.2", "1.9.3" }
dep('rails.gem_installed') { rubies "1.8.7", "1.9.2", "1.9.3"; depth 20 }
dep('mysql2.gem_installed') { depth 2 }
dep('airbrake.gem_installed') { depth 2 }
dep('heroku.gem_installed') { depth 2 }
dep('uglifier.gem_installed') { depth 2 }
dep('json.gem_installed') { depth 2 }
dep('unicorn.gem_installed') { depth 2 }
dep('typhoeus.gem_installed') { depth 2 }
dep('therubyracer.gem_installed') { depth 2 }
dep('RedCloth.gem_installed') { depth 1 }