From 0106155a0fda613336a3fc114e7c5c1c62a89bc9 Mon Sep 17 00:00:00 2001
From: Fabio Rehm <fgrehm@gmail.com>
Date: Sat, 1 Feb 2014 20:24:14 -0200
Subject: [PATCH] Disable the plugin on machines backed by cloud providers (fix
 GH-45)

---
 lib/vagrant-cachier/config.rb | 12 ++++++++++++
 lib/vagrant-cachier/plugin.rb |  6 +++++-
 locales/en.yml                |  3 +++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/vagrant-cachier/config.rb b/lib/vagrant-cachier/config.rb
index ac857a7..fb43280 100644
--- a/lib/vagrant-cachier/config.rb
+++ b/lib/vagrant-cachier/config.rb
@@ -28,6 +28,12 @@ module VagrantPlugins
       def validate(machine)
         errors = _detected_errors
 
+        if enabled? && backed_by_cloud_provider?(machine)
+          machine.ui.warn(I18n.t('vagrant_cachier.backed_by_cloud_provider',
+                                 provider: machine.provider_name))
+          disable!
+        end
+
         if enabled? && ! ALLOWED_SCOPES.include?(@scope.to_s)
           errors << I18n.t('vagrant_cachier.unknown_cache_scope',
                             allowed:     ALLOWED_SCOPES.inspect,
@@ -55,6 +61,12 @@ module VagrantPlugins
         @synced_folder_opts = nil if @synced_folder_opts == UNSET_VALUE
         @buckets = @buckets ? @buckets.dup : {}
       end
+
+      private
+
+      def backed_by_cloud_provider?(machine)
+        CLOUD_PROVIDERS.include?(machine.provider_name.to_s)
+      end
     end
   end
 end
diff --git a/lib/vagrant-cachier/plugin.rb b/lib/vagrant-cachier/plugin.rb
index 93a9b27..e9523dc 100644
--- a/lib/vagrant-cachier/plugin.rb
+++ b/lib/vagrant-cachier/plugin.rb
@@ -11,12 +11,16 @@ module VagrantPlugins
   module Cachier
     class Plugin < Vagrant.plugin('2')
       name 'vagrant-cachier'
-
       config 'cache' do
         require_relative "config"
         Config
       end
     end
+
+    # Keep an eye on https://github.com/mitchellh/vagrant/wiki/Available-Vagrant-Plugins#wiki-providers
+    # for more.
+    CLOUD_PROVIDERS = %w( aws cloudstack digitalocean hp joyent openstack rackspace
+                          softlayer proxmox managed virtualbox )
   end
 end
 
diff --git a/locales/en.yml b/locales/en.yml
index a8eaefd..c67c616 100644
--- a/locales/en.yml
+++ b/locales/en.yml
@@ -16,3 +16,6 @@ en:
       scoped cache dirs starting with the 0.3.0 version of the plugin.
     unable_to_ssh: |-
       vagrant-cachier was unable to SSH into the VM to remove symlinks!
+    backed_by_cloud_provider: |-
+      The machine is backed by a cloud provider (%{provider}), caching
+      will be disabled.