Add support for parallels provider and use NFS for shared filesystem.

Vagrantfile

@@ -11,8 +11,14 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
   # Every Vagrant virtual environment requires a box to build off of.
   config.vm.box = "ubuntu/trusty64"
+
   # Using Ubuntu Server 14.04 (Trusty Tahr), supported by R
 
+  # if we are running parallels provider, use the following box
+  config.vm.provider "parallels" do |v, override|
+    override.vm.box = "parallels/ubuntu-14.04"
+  end
+
   # Disable automatic box update checking. If you disable this, then
   # boxes will only be checked for updates when the user runs
   # `vagrant box outdated`. This is not recommended.
@@ -25,7 +31,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
   # Create a private network, which allows host-only access to the machine
   # using a specific IP.
-  config.vm.network "private_network", ip: "66.66.66.10"
+  config.vm.network "private_network", ip: "192.168.33.12"
 
   # Create a public network, which generally matched to bridged network.
   # Bridged networks make the machine appear as another physical device on
@@ -36,20 +42,32 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   # Default value: false
   # config.ssh.forward_agent = true
 
-  # Share an additional folder to the guest VM. The first argument is
-  # the path on the host to the actual folder. The second argument is
-  # the path on the guest to mount the folder. And the optional third
-  # argument is a set of non-required options.
-  config.vm.synced_folder "./project/", "/www-shiny/", create: true
-  # The shiny:shiny user is created after provisioning using uid=999 and
-  # guid=999. Mounting "/www-shiny-writeable/" using the expected uid and guid
-  # as is done below allows us to mount the shared folder with shiny:shiny
-  # permissions before the shiny user is created. This method allows the Shiny
-  # server to write to the app folder below, but not the one above (whose user
-  # is vagrant).
-  config.vm.synced_folder "./writeable-project/", "/www-shiny-writeable/",
-     create: true, mount_options:["uid=999,gid=999"]
-  # Share the project folder to your Shiny web server folder
+  # config.vm.synced_folder "../data", "/vagrant_data"
+  hostos = RbConfig::CONFIG["host_os"].downcase
+  case hostos
+  when 'linux-gnu'
+    # Share an additional folder to the guest VM. The first argument is
+    # the path on the host to the actual folder. The second argument is
+    # the path on the guest to mount the folder. And the optional third
+    # argument is a set of non-required options.
+    config.vm.synced_folder './project/', '/www-shiny/', :nfs => true,
+      :mount_options => ['rw', 'vers=3', 'tcp', 'nordirplus', 'nolock', 'local_lock=none'],
+      :create => true
+    # The shiny:shiny user is created after provisioning using uid=999 and
+    # guid=999. Mounting "/www-shiny-writeable/" using the expected uid and guid
+    # as is done below allows us to mount the shared folder with shiny:shiny
+    # permissions before the shiny user is created. This method allows the Shiny
+    # server to write to the app folder below, but not the one above (whose user
+    # is vagrant).
+    config.vm.synced_folder './writeable-project/', '/www-shiny-writeable/',
+       :nfs => true, :mount_options => ['rw', 'vers=3', 'tcp', 'nordirplus',
+       'nolock', 'local_lock=none'], :create => true
+    # Share the project folder to your Shiny web server folder
+  else
+    config.vm.synced_folder './project/', '/www-shiny/', :nfs => true, :create => true
+    config.vm.synced_folder './writeable-project/', '/www-shiny-writeable/', :nfs => true,
+       :create => true
+  end
 
   # Provider-specific configuration so you can fine-tune various
   # backing providers for Vagrant. These expose provider-specific options.
@@ -63,6 +81,15 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
     vb.customize ["modifyvm", :id, "--memory", "1536"]
   end
   #
+  config.vm.provider "parallels" do |vb|
+  #   # Don't boot with headless mode
+  #   vb.gui = true
+  #
+  #   # Use VBoxManage to customize the VM. For example to change memory:
+    vb.update_guest_tools = true
+    vb.memory = 1536
+  end
+  #
   # View the documentation for the provider you're using for more
   # information on available options.