vendor/rails/railties/lib/tasks/gems.rake

   1 desc "List the gems that this rails application depends on"
   2 task :gems => 'gems:base' do
   3   Rails.configuration.gems.each do |gem|
   4     print_gem_status(gem)
   5   end
   6   puts
   7   puts "I = Installed"
   8   puts "F = Frozen"
   9   puts "R = Framework (loaded before rails starts)"
  10 end
  11
  12 namespace :gems do
  13   task :base do
  14     $gems_rake_task = true
  15     require 'rubygems'
  16     require 'rubygems/gem_runner'
  17     Rake::Task[:environment].invoke
  18   end
  19
  20   desc "Build any native extensions for unpacked gems"
  21   task :build do
  22     $gems_build_rake_task = true
  23     Rake::Task['gems:unpack'].invoke
  24     current_gems.each &:build
  25   end
  26
  27   desc "Installs all required gems."
  28   task :install => :base do
  29     current_gems.each &:install
  30   end
  31
  32   desc "Unpacks all required gems into vendor/gems."
  33   task :unpack => :install do
  34     current_gems.each &:unpack
  35   end
  36
  37   namespace :unpack do
  38     desc "Unpacks all required gems and their dependencies into vendor/gems."
  39     task :dependencies => :install do
  40       current_gems.each { |gem| gem.unpack(:recursive => true) }
  41     end
  42   end
  43
  44   desc "Regenerate gem specifications in correct format."
  45   task :refresh_specs => :base do
  46     current_gems.each &:refresh
  47   end
  48 end
  49
  50 def current_gems
  51   gems = Rails.configuration.gems
  52   gems = gems.select { |gem| gem.name == ENV['GEM'] } unless ENV['GEM'].blank?
  53   gems
  54 end
  55
  56 def print_gem_status(gem, indent=1)
  57   code = case
  58     when gem.framework_gem? then 'R'
  59     when gem.frozen?        then 'F'
  60     when gem.installed?     then 'I'
  61     else                         ' '
  62   end
  63   puts "   "*(indent-1)+" - [#{code}] #{gem.name} #{gem.requirement.to_s}"
  64   gem.dependencies.each { |g| print_gem_status(g, indent+1) }
  65 end