Computed defaults

README.md

@@ -60,6 +60,43 @@ berkshelf-vagrant, so upgrading this Vagrant plugin is recommended.
 
 Please read the [Driver usage][driver_usage] page for more details.
 
+## <a name="default-config"></a> Default Configuration
+
+This driver can determine the Vagrant box name and download URL for a select
+number of platforms. Currently, the following platform names are supported:
+
+```ruby
+---
+platforms:
+- name: ubuntu-10.04
+- name: ubuntu-12.04
+- name: ubuntu-12.10
+- name: ubuntu-13.04
+- name: centos-5.9
+- name: centos-6.4
+- name: debian-7.1.0
+```
+
+This will effectively generate a configuration similar to:
+
+```ruby
+---
+platforms:
+- name: ubuntu-10.04
+  driver_config:
+    box: opscode-ubuntu-10.04
+    box_url: https://opscode-vm-bento.s3.amazonaws.com/vagrant/opscode_ubuntu-10.04_provisionerless.box
+- name: ubuntu-12.04
+  driver_config:
+    box: opscode-ubuntu-12.04
+    box_url: https://opscode-vm-bento.s3.amazonaws.com/vagrant/opscode_ubuntu-12.04_provisionerless.box
+- name: ubuntu-12.10
+  driver_config:
+    box: opscode-ubuntu-12.10
+    box_url: ...
+# ...
+```
+
 ## <a name="config"></a> Configuration
 
 ### <a name="config-box"></a> box

lib/kitchen/driver/vagrant.rb

@@ -36,6 +36,12 @@ class Vagrant < Kitchen::Driver::SSHBase
 
       default_config :customize, { :memory => '256' }
       default_config :synced_folders, {}
+      default_config :box do |driver|
+        driver.default_values("box")
+      end
+      default_config :box_url do |driver|
+        driver.default_values("box_url")
+      end
 
       required_config :box
 
@@ -85,10 +91,32 @@ def verify_dependencies
         check_berkshelf_plugin if config[:use_vagrant_berkshelf_plugin]
       end
 
+      def default_values(value)
+        (default_boxes[instance.platform.name] || Hash.new)[value]
+      end
+
       protected
 
       WEBSITE = "http://downloads.vagrantup.com/"
       MIN_VER = "1.1.0"
+      OMNITRUCK_PREFIX = "https://opscode-vm-bento.s3.amazonaws.com/vagrant"
+      PLATFORMS = %w{
+        ubuntu-10.04 ubuntu-12.04 ubuntu-12.10 ubuntu-13.04
+        centos-6.4 centos-5.9 debian-7.1.0
+      }
+
+      def default_boxes
+        @default_boxes ||= begin
+          hash = Hash.new
+          PLATFORMS.each do |platform|
+            hash[platform] = Hash.new
+            hash[platform]["box"] = "opscode-#{platform}"
+            hash[platform]["box_url"] =
+              "#{OMNITRUCK_PREFIX}/opscode_#{platform}_provisionerless.box"
+          end
+          hash
+        end
+      end
 
       def run(cmd, options = {})
         cmd = "echo #{cmd}" if config[:dry_run]

lib/kitchen/vagrant/vagrantfile_creator.rb

@@ -60,7 +60,7 @@ def guest_block(arr)
           arr << %{  c.vm.guest = #{config[:guest]}}
         end
       end
-      
+
       def network_block(arr)
         Array(config[:network]).each do |network_options|
           options = Array(network_options.dup)