Add synced_folder_capability

lib/vagrant/machine.rb

@@ -1,4 +1,5 @@
 require_relative "util/ssh"
+require_relative "action/builtin/mixin_synced_folders"
 
 require "digest/md5"
 require "thread"
@@ -10,6 +11,8 @@ module Vagrant
   # API for querying the state and making state changes to the machine, which
   # is backed by any sort of provider (VirtualBox, VMware, etc.).
   class Machine
+    include Vagrant::Action::Builtin::MixinSyncedFolders
+
     # The box that is backing this machine.
     #
     # @return [Box]

lib/vagrant/plugin/v2/components.rb

@@ -64,6 +64,11 @@ module Vagrant
         # @return [Registry<Symbol, Array<Class, Integer>>]
         attr_reader :synced_folders
 
+        # This contains all the registered synced folder capabilities.
+        #
+        # @return [Hash<Symbol, Registry>]
+        attr_reader :synced_folder_capabilities
+
         def initialize
           # The action hooks hash defaults to []
           @action_hooks = Hash.new { |h, k| h[k] = [] }
@@ -78,6 +83,7 @@ module Vagrant
           @provider_capabilities = Hash.new { |h, k| h[k] = Registry.new }
           @pushes = Registry.new
           @synced_folders = Registry.new
+          @synced_folder_capabilities = Hash.new { |h, k| h[k] = Registry.new }
         end
       end
     end

lib/vagrant/plugin/v2/manager.rb

@@ -257,7 +257,21 @@ module Vagrant
             end
           end
         end
+        
+        # This returns all the registered synced folder capabilities.
+        #
+        # @return [Hash]
+        def synced_folder_capabilities
+          results = Hash.new { |h, k| h[k] = Registry.new }
 
+          @registered.each do |plugin|
+            plugin.components.synced_folder_capabilities.each do |synced_folder, caps|
+              results[synced_folder].merge!(caps)
+            end
+          end
+
+          results
+        end
         # This registers a plugin. This should _NEVER_ be called by the public
         # and should only be called from within Vagrant. Vagrant will
         # automatically register V2 plugins when a name is set on the

lib/vagrant/plugin/v2/plugin.rb

@@ -247,6 +247,18 @@ module Vagrant
           nil
         end
 
+        # Defines a capability for the given synced folder. The block should return
+        # a class/module that has a method with the capability name, ready
+        # to be executed. This means that if it is an instance method,
+        # the block should return an instance of the class.
+        #
+        # @param [String] host The name of the synced folder
+        # @param [String] cap The name of the capability
+        def self.synced_folder_capability(synced_folder, cap, &block)
+          components.synced_folder_capabilities[synced_folder.to_sym].register(cap.to_sym, &block)
+          nil
+        end
+
         # Returns the internal data associated with this plugin. This
         # should NOT be called by the general public.
         #

lib/vagrant/plugin/v2/synced_folder.rb

@@ -3,6 +3,8 @@ module Vagrant
     module V2
       # This is the base class for a synced folder implementation.
       class SyncedFolder
+        include CapabilityHost
+
         # This is called early when the synced folder is set to determine
         # if this implementation can be used for this machine. This should
         # return true or false.
@@ -54,6 +56,12 @@ module Vagrant
         # @param [Hash] opts
         def cleanup(machine, opts)
         end
+
+        def _initialize(machine, synced_folder_type)
+          plugins = Vagrant.plugin("2").manager.synced_folders
+          capabilities = Vagrant.plugin("2").manager.synced_folder_capabilities
+          initialize_capabilities!(synced_folder_type, plugins, capabilities, machine)
+        end
       end
     end
   end

plugins/kernel_v2/config/vm.rb

@@ -508,7 +508,6 @@ module VagrantPlugins
 
       def finalize!
         # Defaults
-        @allow_fstab_modification = true if @allow_fstab_modification == UNSET_VALUE
         @allowed_synced_folder_types = nil if @allowed_synced_folder_types == UNSET_VALUE
         @base_mac = nil if @base_mac == UNSET_VALUE
         @base_address = nil if @base_address == UNSET_VALUE
@@ -726,6 +725,21 @@ module VagrantPlugins
       def validate(machine, ignore_provider=nil)
         errors = _detected_errors
 
+        if @allow_fstab_modification == UNSET_VALUE
+          plugins = Vagrant.plugin("2").manager.synced_folders
+          machine.synced_folders.each do |type, _|
+            instance = plugins[type.to_sym][0].new
+            instance._initialize(machine, type)
+            if instance.capability?(:default_fstab_modification)
+              if instance.capability(:default_fstab_modification) == false
+                @allow_fstab_modification = false
+                break
+              end
+            end
+          end
+          @allow_fstab_modification = true if @allow_fstab_modification == UNSET_VALUE
+        end
+
         if !box && !clone && !machine.provider_options[:box_optional]
           errors << I18n.t("vagrant.config.vm.box_missing")
         end

plugins/synced_folders/smb/cap/default_fstab_modification.rb

@@ -0,0 +1,11 @@
+module VagrantPlugins
+  module SyncedFolderSMB
+    module Cap
+      module DefaultFstabModification
+        def self.default_fstab_modification(machine)
+          return false
+        end
+      end
+    end
+  end
+end

plugins/synced_folders/smb/plugin.rb

@@ -23,6 +23,11 @@ module VagrantPlugins
         SyncedFolder
       end
 
+      synced_folder_capability("smb", "default_fstab_modification") do
+        require_relative "cap/default_fstab_modification"
+        Cap::DefaultFstabModification
+      end
+
       protected
 
       def self.init!