Refactor box collection to support looking for boxes multi-provider

lib/vagrant/box_collection.rb

@@ -220,10 +220,13 @@ module Vagrant
     # Find a box in the collection with the given name and provider.
     #
     # @param [String] name Name of the box (logical name).
-    # @Param [String] provider Provider that the box implements.
+    # @param [String] provider Provider that the box implements.
     # @return [Box] The box found, or `nil` if not found.
-    def find(name, provider)
+    def find(name, providers)
+      providers = [providers].flatten
+
       with_collection_lock do
+        providers.each do |provider|
           # First look directly for the box we're asking for.
           box_directory = @directory.join(name, provider.to_s, "metadata.json")
           @logger.info("Searching for box: #{name} (#{provider}) in #{box_directory}")
@@ -250,9 +253,10 @@ module Vagrant
             end
           end
         end
+      end
 
       # Didn't find it, return nil
-      @logger.info("Box not found: #{name} (#{provider})")
+      @logger.info("Box not found: #{name} (#{providers.join(", ")})")
       nil
     end
 

lib/vagrant/environment.rb

@@ -339,7 +339,17 @@ module Vagrant
       box_changed  = false
 
       load_box_and_overrides = lambda do
-        box = find_box(config.vm.box, box_formats) if config.vm.box
+        box = nil
+        if config.vm.box
+          begin
+            box = boxes.find(config.vm.box, box_formats)
+          rescue Errors::BoxUpgradeRequired
+            # Upgrade the box if we must
+            @logger.info("Upgrading box during config load: #{config.vm.box}")
+            boxes.upgrade(config.vm.box)
+            retry
+          end
+        end
 
         # If a box was found, then we attempt to load the Vagrantfile for
         # that box. We don't require a box since we allow providers to download
@@ -694,39 +704,6 @@ module Vagrant
       Pathname.new(path)
     end
 
-    # This finds a box for the given name and formats, or returns nil
-    # if the box isn't found.
-    #
-    # @param [String] name Name of the box
-    # @param [Array<Symbol>] formats The formats to search for the box.
-    # @return [Box]
-    def find_box(name, formats)
-      # Determine the box formats we support
-      formats = [formats] if !formats.is_a?(Array)
-
-      @logger.info("Provider-supported box formats: #{formats.inspect}")
-      formats.each do |format|
-        box = nil
-
-        begin
-          box = boxes.find(name, format.to_s)
-        rescue Errors::BoxUpgradeRequired
-          # Upgrade the box if we must
-          @logger.info("Upgrading box during config load: #{name}")
-          boxes.upgrade(name)
-          retry
-        end
-
-        # If a box was found, we exit
-        if box
-          @logger.info("Box found with format: #{format}")
-          return box
-        end
-      end
-
-      nil
-    end
-
     # Finds the Vagrantfile in the given directory.
     #
     # @param [Pathname] path Path to search in.