(#8719) Add force flag for box upgrade command

Prior to this commit, if a state was reached where the action_box_add
command needed a force flag, it would fail requesting the user to
provide that flag to override adding a new box. However that flag did
not exist on the box update command, and could not be passed onto the
action_box_add action. This commit updates that to include a force flag,
and if used, pass that value onto the action_box_add action.

plugins/commands/box/command/update.rb

@@ -33,6 +33,10 @@ module VagrantPlugins
               options[:provider] = p.to_sym
             end
 
+            o.on("-f", "--force", "Overwrite an existing box if it exists") do |f|
+              options[:force] = f
+            end
+
             build_download_options(o, download_options)
           end
 
@@ -40,15 +44,15 @@ module VagrantPlugins
           return if !argv
 
           if options[:box]
-            update_specific(options[:box], options[:provider], download_options)
+            update_specific(options[:box], options[:provider], download_options, options[:force])
           else
-            update_vms(argv, options[:provider], download_options)
+            update_vms(argv, options[:provider], download_options, options[:force])
           end
 
           0
         end
 
-        def update_specific(name, provider, download_options)
+        def update_specific(name, provider, download_options, force)
           boxes = {}
           @env.boxes.all.each do |n, v, p|
             boxes[n] ||= {}
@@ -81,11 +85,11 @@ module VagrantPlugins
 
           to_update.each do |n, p, v|
             box = @env.boxes.find(n, p, v)
-            box_update(box, "> #{v}", @env.ui, download_options)
+            box_update(box, "> #{v}", @env.ui, download_options, force)
           end
         end
 
-        def update_vms(argv, provider, download_options)
+        def update_vms(argv, provider, download_options, force)
           machines = {}
 
           with_target_vms(argv, provider: provider) do |machine|
@@ -120,11 +124,11 @@ module VagrantPlugins
             if download_options[:insecure].nil?
               download_options[:insecure] = machine.config.vm.box_download_insecure
             end
-            box_update(box, version, machine.ui, download_options)
+            box_update(box, version, machine.ui, download_options, force)
           end
         end
 
-        def box_update(box, version, ui, download_options)
+        def box_update(box, version, ui, download_options, force)
           ui.output(I18n.t("vagrant.box_update_checking", name: box.name))
           ui.detail("Latest installed version: #{box.version}")
           ui.detail("Version constraints: #{version}")
@@ -149,6 +153,7 @@ module VagrantPlugins
             box_provider: update[2].name,
             box_version: update[1].version,
             ui: ui,
+            box_force: force,
             box_client_cert: download_options[:client_cert],
             box_download_ca_cert: download_options[:ca_cert],
             box_download_ca_path: download_options[:ca_path],

test/unit/plugins/commands/box/command/update_test.rb

@@ -94,6 +94,7 @@ describe VagrantPlugins::CommandBox::Command::Update do
         allow(action_runner).to receive(:run) do |action, opts|
           if opts[:box_provider]
             action_called = true
+            expect(opts[:box_force]).to eq(nil)
             expect(opts[:box_url]).to eq(metadata_url.to_s)
             expect(opts[:box_provider]).to eq("virtualbox")
             expect(opts[:box_version]).to eq("1.1")
@@ -356,6 +357,27 @@ describe VagrantPlugins::CommandBox::Command::Update do
               subject.execute
             end
           end
+
+          context "force flag is specified on the command line" do
+            let(:argv) { ["--force"].concat(download_options) }
+
+            it "passes force through to action_box_add as true" do
+              expect(box).to receive(:has_update?).
+                with(machine.config.vm.box_version,
+                     {download_options:
+                       {ca_cert: "foo", ca_path: "bar", client_cert: "baz",
+                        insecure: true}}).
+                and_return([md, md.version("1.1"),
+                            md.version("1.1").provider("virtualbox")])
+
+              expect(action_runner).to receive(:run).with(any_args) { |action, opts|
+                expect(opts[:box_force]).to be(true)
+                true
+              }
+
+              subject.execute
+            end
+          end
         end
       end
     end