Added config.gem for specifying which gems are required by the application, as well as rake tasks for installing and freezing gems. [rick]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@9140 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 31 insertions, 0 deletions

diff --git a/railties/lib/tasks/gems.rake b/railties/lib/tasks/gems.rake
new file mode 100644
index 0000000000..198f6050c3
--- /dev/null
+++ b/railties/lib/tasks/gems.rake
@@ -0,0 +1,31 @@
+desc "List the gems that this rails application depends on"
+task :gems => :environment do
+  Rails.configuration.gems.each do |gem|
+    puts "[#{gem.loaded? ? '*' : ' '}] #{gem.name} #{gem.requirement.to_s}"
+  end
+end
+
+namespace :gems do
+  desc "Installs all required gems for this application."
+  task :install => :environment do
+    require 'rubygems'
+    require 'rubygems/gem_runner'
+    Rails.configuration.gems.each { |gem| gem.install unless gem.loaded? }
+  end
+
+  desc "Unpacks the specified gem into vendor/gems."
+  task :unpack do
+    raise "Specify name of gem in the config.gems array with GEM=" if ENV['GEM'].blank?
+    Rake::Task["environment"].invoke
+    require 'rubygems'
+    require 'rubygems/gem_runner'
+    unless Rails.configuration.gems.select do |gem|
+      if gem.loaded? && gem.name == ENV['GEM']
+        gem.unpack_to(File.join(RAILS_ROOT, 'vendor', 'gems'))
+        true
+      end
+    end.any?
+      puts "No gem named #{ENV['GEM'].inspect} found."
+    end
+  end
+end
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