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desc "List the gems that this rails application depends on"
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task :gems => 'gems:base' do
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Rails.configuration.gems.each do |gem|
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puts "R = Framework (loaded before rails starts)"
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$gems_rake_task = true
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require 'rubygems/gem_runner'
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Rake::Task[:environment].invoke
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desc "Build any native extensions for unpacked gems"
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$gems_build_rake_task = true
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frozen_gems.each { |gem| gem.build }
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desc "Force the build of all gems"
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$gems_build_rake_task = true
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frozen_gems.each { |gem| gem.build(:force => true) }
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desc "Installs all required gems."
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task :install => :base do
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current_gems.each { |gem| gem.install }
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desc "Unpacks all required gems into vendor/gems."
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task :unpack => :install do
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current_gems.each { |gem| gem.unpack }
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desc "Unpacks all required gems and their dependencies into vendor/gems."
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task :dependencies => :install do
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current_gems.each { |gem| gem.unpack(:recursive => true) }
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desc "Regenerate gem specifications in correct format."
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task :refresh_specs do
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frozen_gems(false).each { |gem| gem.refresh }
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gems = Rails.configuration.gems
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gems = gems.select { |gem| gem.name == ENV['GEM'] } unless ENV['GEM'].blank?
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def frozen_gems(load_specs=true)
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Dir[File.join(RAILS_ROOT, 'vendor', 'gems', '*-*')].map do |gem_dir|
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Rails::GemDependency.from_directory_name(gem_dir, load_specs)
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def print_gem_status(gem, indent=1)
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when gem.framework_gem? then 'R'
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when gem.frozen? then 'F'
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when gem.installed? then 'I'
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puts " "*(indent-1)+" - [#{code}] #{gem.name} #{gem.requirement.to_s}"
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gem.dependencies.each { |g| print_gem_status(g, indent+1) }