Join a specific host only network if name is specified.

lib/vagrant/actions/vm/network.rb

@@ -19,40 +19,46 @@ module Vagrant
         def assign_network
           logger.info "Enabling host only network..."
 
-          options = runner.env.config.vm.network_options
-          adapter = runner.vm.network_adapters[options[:adapter]]
+          network_options = runner.env.config.vm.network_options
+          adapter = runner.vm.network_adapters[network_options[:adapter]]
           adapter.enabled = true
           adapter.attachment_type = :host_only
-          adapter.host_interface = network_name(options)
+          adapter.host_interface = network_name(network_options)
           adapter.save
         end
 
         # Returns the name of the proper host only network, or creates
         # it if it does not exist. Vagrant determines if the host only
         # network exists by comparing the netmask and the IP.
-        def network_name(options)
+        def network_name(net_options)
           # First try to find a matching network
           interfaces = VirtualBox::Global.global.host.network_interfaces
           interfaces.each do |ni|
-            return ni.name if matching_network?(ni, options)
+            if net_options[:name]
+              return ni.name if net_options[:name] == ni.name
+            else
+              return ni.name if matching_network?(ni, net_options)
+            end
           end
 
+          raise ActionException.new(:network_not_found, :name => net_options[:name]) if net_options[:name]
+
           # One doesn't exist, create it.
           logger.info "Creating new host only network for environment..."
 
           ni = interfaces.create
-          ni.enable_static(network_ip(options[:ip], options[:netmask]),
-                           options[:netmask])
+          ni.enable_static(network_ip(net_options[:ip], net_options[:netmask]),
+                           net_options[:netmask])
           ni.name
         end
 
         # Tests if a network matches the given options by applying the
         # netmask to the IP of the network and also to the IP of the
         # virtual machine and see if they match.
-        def matching_network?(interface, options)
-          interface.network_mask == options[:netmask] &&
+        def matching_network?(interface, net_options)
+          interface.network_mask == net_options[:netmask] &&
             apply_netmask(interface.ip_address, interface.network_mask) ==
-            apply_netmask(options[:ip], options[:netmask])
+            apply_netmask(net_options[:ip], net_options[:netmask])
         end
 
         # Applies a netmask to an IP and returns the corresponding

lib/vagrant/config.rb

@@ -136,6 +136,7 @@ module Vagrant
         options = {
           :ip => ip,
           :netmask => "255.255.255.0",
+          :adapter => 1,
           :name => nil
         }.merge(options || {})
 

templates/strings.yml

@@ -111,6 +111,11 @@
   already be created, but unfortunately this vagrant still appears to
   have no box! You can setup the environment by setting up your
   <%= Vagrant::Environment::ROOTFILE_NAME %> and running `vagrant up`
+:network_not_found: |-
+  The specified host network could not be found: <%= name %>.
+  If the name specification is removed, Vagrant will create a new
+  host only network for you. Alternatively, please create the
+  specified network manually.
 :package_include_file_doesnt_exist: |-
   File specified to include: '<%= filename %>' does not exist!
 :package_multivm: |-

test/vagrant/actions/vm/network_test.rb

@@ -70,7 +70,7 @@ class NetworkTest < Test::Unit::TestCase
 
       @action.stubs(:matching_network?).returns(false)
 
-      @options = { :ip => :foo, :netmask => :bar }
+      @options = { :ip => :foo, :netmask => :bar, :name => nil }
     end
 
     should "return the network which matches" do
@@ -83,6 +83,26 @@ class NetworkTest < Test::Unit::TestCase
       assert_equal result, @action.network_name(@options)
     end
 
+    should "return the network which matches the name if given" do
+      @options[:name] = "foo"
+
+      interface = mock("interface")
+      interface.stubs(:name).returns(@options[:name])
+      @interfaces << interface
+
+      assert_equal @options[:name], @action.network_name(@options)
+    end
+
+    should "error and exit if the given network name is not found" do
+      @options[:name] = "foo"
+
+      @interfaces.expects(:create).never
+
+      assert_raises(Vagrant::Actions::ActionException) {
+        @action.network_name(@options)
+      }
+    end
+
     should "create a network for the IP and netmask" do
       result = mock("result")
       interface = mock("interface")

vagrant.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new("> 1.3.1") if s.respond_to? :required_rubygems_version=
   s.authors = ["Mitchell Hashimoto", "John Bender"]
-  s.date = %q{2010-05-30}
+  s.date = %q{2010-06-03}
   s.default_executable = %q{vagrant}
   s.description = %q{Vagrant is a tool for building and distributing virtualized development environments.}
   s.email = ["mitchell.hashimoto@gmail.com", "john.m.bender@gmail.com"]
@@ -50,6 +50,7 @@ Gem::Specification.new do |s|
      "lib/vagrant/actions/vm/halt.rb",
      "lib/vagrant/actions/vm/import.rb",
      "lib/vagrant/actions/vm/move_hard_drive.rb",
+     "lib/vagrant/actions/vm/network.rb",
      "lib/vagrant/actions/vm/package.rb",
      "lib/vagrant/actions/vm/provision.rb",
      "lib/vagrant/actions/vm/reload.rb",
@@ -128,6 +129,7 @@ Gem::Specification.new do |s|
      "test/vagrant/actions/vm/halt_test.rb",
      "test/vagrant/actions/vm/import_test.rb",
      "test/vagrant/actions/vm/move_hard_drive_test.rb",
+     "test/vagrant/actions/vm/network_test.rb",
      "test/vagrant/actions/vm/package_test.rb",
      "test/vagrant/actions/vm/provision_test.rb",
      "test/vagrant/actions/vm/reload_test.rb",
@@ -218,6 +220,7 @@ Gem::Specification.new do |s|
      "test/vagrant/actions/vm/import_test.rb",
      "test/vagrant/actions/vm/customize_test.rb",
      "test/vagrant/actions/vm/start_test.rb",
+     "test/vagrant/actions/vm/network_test.rb",
      "test/vagrant/actions/vm/move_hard_drive_test.rb",
      "test/vagrant/actions/vm/up_test.rb",
      "test/vagrant/actions/vm/export_test.rb",