Fix config validation.

This commit fixes issue #5. Additionally, it deactivates the auto
update behavior by default. Users must set `enabled` to true to activate
auto updates for the hosts file.

README.md

@@ -21,17 +21,17 @@ Install the plugin following the typical Vagrant 1.1 procedure:
 
 Usage
 -----
-The plugin hooks into the `vagrant up` and `vagrant destroy` commands
-automatically. When a machine is created or destroyed, all active
-machines with the same provider will have their `/etc/hosts` file updated
-accordingly. Auto update may be disabled by setting the
-`config.hostmanager.auto_update` attribute to false in the Vagrantfile.
-
-To update the `/etc/hosts` file on each active machine manually, run the
-following command:
+To update the `/etc/hosts` file on each active machine, run the following
+command:
 
     $ vagrant hostmanager
 
+The plugin may hook into the `vagrant up` and `vagrant destroy` commands
+automatically. When a machine is created or destroyed, all active
+machines with the same provider will have their `/etc/hosts` file updated
+accordingly. Set the `hostmanager.enabled` attribute to `true` in the
+Vagrantfile to activate this behavior.
+
 A machine's IP address is defined by either the static IP for a private
 network configuration or by the SSH host configuration. To disable
 using the private network IP address, set `config.hostmanger.ignore_private_ip`
@@ -47,7 +47,7 @@ Example configuration:
 
 ```ruby
 Vagrant.configure("2") do |config|
-  config.hostmanager.auto_update = true
+  config.hostmanager.enabled = true
   config.hostmanager.ignore_private_ip = false
   config.vm.define "example-box" do |node|
     node.vm.hostname = "example-box-hostname"

lib/vagrant-hostmanager/action/update_hosts_file.rb

@@ -17,7 +17,7 @@ module VagrantPlugins
           return @app.call(env) if @machine.id
 
           # check config to see if the hosts file should be update automatically
-          return @app.call(env) if !@machine.config.hostmanager.auto_update
+          return @app.call(env) unless @machine.config.hostmanager.enabled?
           @logger.info 'Updating /etc/hosts file automatically'
 
           # continue the action stack so the machine will be created

lib/vagrant-hostmanager/config.rb

@@ -1,31 +1,33 @@
 module VagrantPlugins
   module HostManager
     class Config < Vagrant.plugin('2', :config)
-      attr_accessor :auto_update
+      attr_accessor :enabled
       attr_accessor :ignore_private_ip
       attr_accessor :aliases
 
+      alias_method :enabled?, :enabled
+
       def initialize
-        @auto_update = UNSET_VALUE
+        @enabled = false
         @ignore_private_ip = UNSET_VALUE
-        @aliases = Array.new 
+        @aliases = Array.new
       end
 
       def finalize!
-        @auto_update = true if @auto_update == UNSET_VALUE
         @ignore_private_ip = false if @ignore_private_ip == UNSET_VALUE
       end
 
       def validate(machine)
         errors = Array.new
 
-        # check if auto_update option is either true or false
-        if ![TrueClass, FalseClass].include?(auto_update.class)
-          errors << "A value for hostmanager.auto_update can be true or false."
+        # check if enabled option is either true or false
+        if ![TrueClass, FalseClass].include?(enabled.class)
+          errors << "A value for hostmanager.enabled can be true or false."
         end
 
         # check if ignore_private_ip option is either true or false
-        if ![TrueClass, FalseClass].include?(ignore_private_ip.class)
+        if ![TrueClass, FalseClass].include?(ignore_private_ip.class) &&
+          @ignore_private_ip != UNSET_VALUE
           errors << "A value for hostmanager.ignore_private_ip can be true or false."
         end
 
@@ -33,7 +35,7 @@ module VagrantPlugins
         if !machine.config.hostmanager.aliases.kind_of?(Array)
           errors << "A value for hostmanager.aliases must be an Array."
         end
-        
+
         { "HostManager configuration" => errors }
       end
     end

lib/vagrant-hostmanager/version.rb

@@ -1,5 +1,5 @@
 module VagrantPlugins
   module HostManager
-    VERSION = '0.1.2'
+    VERSION = '0.2.0'
   end
 end

test/Vagrantfile

@@ -7,7 +7,7 @@ Vagrant.configure('2') do |config|
   config.vm.box = 'precise64-chef11.2'
   config.vm.box_url = 'https://opscode-vm.s3.amazonaws.com/vagrant/opscode_ubuntu-12.04_chef-11.2.0.box'
 
-  config.hostmanager.auto_update = true
+  config.hostmanager.enabled = true
 
   config.vm.define :server1 do |server|
     server.vm.hostname = 'fry'