install package for bundler's Gemfile

lib/rip.rb

@@ -56,6 +56,7 @@ def self.user_home
 require 'rip/packages/git_package'
 require 'rip/packages/http_package'
 require 'rip/packages/gem_package'
+require 'rip/packages/gemfile_package'
 require 'rip/packages/dir_package'
 require 'rip/packages/file_package'
 require 'rip/packages/remote_gem_package'

lib/rip/packages/gemfile_package.rb

@@ -0,0 +1,84 @@
+module Rip
+  class GemfilePackage < Package
+    handles 'Gemfile'
+
+    class Environment
+      attr_reader :dependencies
+      attr_accessor :rubygems, :system_gems, :gem_path, :bindir
+
+      def initialize
+        @default_sources  = []
+        @sources          = []
+        @priority_sources = []
+        @dependencies     = []
+        @rubygems         = true
+        @system_gems      = true
+      end
+    end
+
+    def initialize(source, *args)
+      package = Rip::Package.for('bundler')
+      installer = Installer.new
+      installer.install(package)
+
+      require 'bundler'
+
+      super
+      @source = File.expand_path(source)
+    end
+
+    def exists?
+      File.exists? source
+    end
+
+    def name
+      source.split('/').last
+    end
+
+    def version
+      nil
+    end
+
+    def actual_package
+      nil
+    end
+
+    def meta_package?
+      true
+    end
+
+    def cached?
+      false
+    end
+
+    def dependency_installed(dependency, success = true)
+      if !success
+        ui.puts "rip: already installed #{dependency}"
+      end
+    end
+
+    def fetch!
+      FileUtils.rm_rf cache_path
+      FileUtils.mkdir_p cache_path
+      FileUtils.cp source, File.join(cache_path, name)
+    end
+
+    def unpack!
+      fetch
+    end
+
+    def dependencies!
+      if File.exists? filename = File.join(cache_path, name)
+        environment = Environment.new
+        builder = Bundler::Dsl.new(environment)
+        builder.instance_eval(File.read(filename))
+
+        environment.dependencies.map { |dependency|
+          Package.for(dependency.name, dependency.version)
+        }
+      else
+        []
+      end
+    end
+  end
+end