Merge pull request #177 from milest/add-google-provider

Add google provider

Author: cgsmith

README.md

@@ -137,6 +137,18 @@ For example, [vagrant-aws](https://github.com/mitchellh/vagrant-aws) configures
 * The tag informations be unique for the instance
 * Enable Elastic IP for the instance
 
+## Using Google as a provider
+
+If you'd like a Google provider using [vagrant-google](https://github.com/mitchellh/vagrant-google), this plugin will detect the public IP from the name of the instance.
+[vagrant-google](https://github.com/mitchellh/vagrant-google) provides a default name, but you can specify your own as follows:
+
+    config.vm.provider :google do |google, override|
+      google.name = "somename"
+      ...
+    end
+
+* [Google Cloud SDK](https://cloud.google.com/sdk/) is required.
+
 ## Installing development version
 
 If you would like to install vagrant-hostsupdater on the development version perform the following:

lib/vagrant-hostsupdater/HostsUpdater.rb

@@ -16,6 +16,8 @@ def getIps
 
         if ip = getAwsPublicIp
           ips.push(ip)
+        elsif ip = getGooglePublicIp
+          ips.push(ip)
         else
             @machine.config.vm.networks.each do |network|
               key, options = network[0], network[1]
@@ -236,6 +238,19 @@ def getAwsPublicIp
           return nil
         end
       end
+
+      def getGooglePublicIp
+        return nil if ! defined?(VagrantPlugins::Google)
+        google_conf = @machine.config.vm.get_provider_config(:google)
+        return nil if ! google_conf.is_a?(VagrantPlugins::Google::Config)
+        cmd = 'gcloud compute instances list --filter="name=%s" --format="value(networkInterfaces[0].accessConfigs[0].natIP)"'
+        cmd = sprintf(cmd, google_conf.name)
+        stdout, stderr, stat = Open3.capture3(cmd)
+        @ui.error "Failed to execute '#{cmd}' : #{stderr}" if stderr != ''
+        ip = stdout.strip
+        return nil if stat.exitstatus != 0 || ip == nil || ip == ''
+        return ip
+      end
     end
   end
 end