Added new include_offline configuration item

README.md

@@ -40,6 +40,10 @@ to true.
 A machine's host name is defined by `config.vm.hostname`. If this is not
 set, it falls back to the symbol defining the machine in the Vagrantfile.
 
+When using include_offline set to true, only boxes that are up or have a
+private ip configured will be added to the hosts file. You will receive a
+warning on skipped boxes.
+
 In addition, the `hostmanager.aliases` configuration attribute can be used
 to provide aliases for your host names.
 
@@ -49,6 +53,7 @@ Example configuration:
 Vagrant.configure("2") do |config|
   config.hostmanager.enabled = true
   config.hostmanager.ignore_private_ip = false
+  config.hostmanager.include_offline = true
   config.vm.define "example-box" do |node|
     node.vm.hostname = "example-box-hostname"
     node.vm.network :private_network, ip: "192.168.42.42"

lib/vagrant-hostmanager/config.rb

@@ -4,13 +4,16 @@ module VagrantPlugins
       attr_accessor :enabled
       attr_accessor :ignore_private_ip
       attr_accessor :aliases
+      attr_accessor :include_offline
 
       alias_method :enabled?, :enabled
+      alias_method :include_offline?, :include_offline
 
       def initialize
         @enabled = false
         @ignore_private_ip = UNSET_VALUE
         @aliases = Array.new
+        @include_offline = false
       end
 
       def finalize!
@@ -24,6 +27,9 @@ module VagrantPlugins
         # check if enabled option is either true or false
         errors << validate_bool('hostmanager.enabled', enabled)
 
+        # check if include_offline is either true or false
+        errors << validate_bool('hostmanager.include_offline', include_offline)
+
         # check if ignore_private_ip option is either true or false (or UNSET_VALUE)
         if @ignore_private_ip != UNSET_VALUE
           errors << validate_bool('hostmanager.ignore_private_ip', ignore_private_ip)