Update behavior of `snapshot restore` and `snapshot pop`

Both of these commands failed to default the options disabling
the provisioning from ignoring the sentinel file. This resulted
in different behavior than what was seen with the `up` and
`resume` commands which would only provision items with run set
to "always". This defaults the options to proper match the behavior
of `up` and `resume` to be consistent.

This also adds an extra `--no-start` flag to allow users to restore
a snapshot but not start the restored guest immediately.

Fixes #6752

plugins/commands/snapshot/command/pop.rb

@@ -17,6 +17,9 @@ module VagrantPlugins
         def execute
           options = {}
           options[:snapshot_delete] = true
+          options[:provision_ignore_sentinel] = false
+          options[:snapshot_start] = true
+
           opts = OptionParser.new do |o|
             o.banner = "Usage: vagrant snapshot pop [options] [vm-name]"
             o.separator ""
@@ -26,6 +29,9 @@ module VagrantPlugins
             o.on("--no-delete", "Don't delete the snapshot after the restore") do
                 options[:snapshot_delete] = false
             end
+            o.on("--no-start", "Don't start the snapshot after the restore") do
+              options[:snapshot_start] = false
+            end
           end
 
           # Parse the options

plugins/commands/snapshot/command/restore.rb

@@ -13,12 +13,18 @@ module VagrantPlugins
 
         def execute
           options = {}
+          options[:provision_ignore_sentinel] = false
+          options[:snapshot_start] = true
 
           opts = OptionParser.new do |o|
             o.banner = "Usage: vagrant snapshot restore [options] [vm-name] <name>"
             o.separator ""
             build_start_options(o, options)
             o.separator "Restore a snapshot taken previously with snapshot save."
+
+            o.on("--no-start", "Don't start the snapshot after the restore") do
+              options[:snapshot_start] = false
+            end
           end
 
           # Parse the options

plugins/providers/virtualbox/action.rb

@@ -267,7 +267,11 @@ module VagrantPlugins
               end
             end
 
-            b2.use action_start
+            b2.use Call, IsEnvSet, :snapshot_start do |env2, b3|
+              if env2[:result]
+                b3.use action_start
+              end
+            end
           end
         end
       end

test/unit/plugins/commands/snapshot/command/pop_test.rb

@@ -25,6 +25,12 @@ describe VagrantPlugins::CommandSnapshot::Command::Pop do
   end
 
   describe "execute" do
+    before do
+      machine.id = "mach"
+      allow(machine.provider).to receive(:capability).
+        with(:snapshot_list).and_return(["push_2_0"])
+    end
+
     it "calls snapshot_restore with the last pushed snapshot" do
       machine.id = "foo"
 
@@ -48,5 +54,33 @@ describe VagrantPlugins::CommandSnapshot::Command::Pop do
       expect(machine).to_not receive(:action)
       expect(subject.execute).to eq(0)
     end
+
+    it "should disable ignoring sentinel file for provisioning" do
+      expect(machine).to receive(:action) do |name, opts|
+        expect(name).to eq(:snapshot_restore)
+        expect(opts[:provision_ignore_sentinel]).to eq(false)
+      end
+      subject.execute
+    end
+
+    it "should start the snapshot" do
+      expect(machine).to receive(:action) do |name, opts|
+        expect(name).to eq(:snapshot_restore)
+        expect(opts[:snapshot_start]).to eq(true)
+      end
+      subject.execute
+    end
+
+    context "when --no-start flag is provided" do
+      let(:argv) { ["--no-start"] }
+
+      it "should not start the snapshot" do
+        expect(machine).to receive(:action) do |name, opts|
+          expect(name).to eq(:snapshot_restore)
+          expect(opts[:snapshot_start]).to eq(false)
+        end
+        subject.execute
+      end
+    end
   end
 end

test/unit/plugins/commands/snapshot/command/restore_test.rb

@@ -12,6 +12,7 @@ describe VagrantPlugins::CommandSnapshot::Command::Restore do
     env.create_vagrant_env
   end
 
+  let(:snapshot_name) { "snapshot_name" }
   let(:guest)   { double("guest") }
   let(:host)    { double("host") }
   let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
@@ -31,6 +32,11 @@ describe VagrantPlugins::CommandSnapshot::Command::Restore do
   end
 
   describe "execute" do
+    before do
+      allow(machine.provider).to receive(:capability).
+        with(:snapshot_list).and_return([snapshot_name])
+    end
+
     context "with no arguments" do
       it "shows help" do
         expect { subject.execute }.
@@ -93,5 +99,32 @@ describe VagrantPlugins::CommandSnapshot::Command::Restore do
           to raise_error(Vagrant::Errors::SnapshotNotFound)
       end
     end
+
+    it "should disable ignoring sentinel file for provisioning" do
+      argv << snapshot_name
+      expect(machine).to receive(:action) do |_, opts|
+        expect(opts[:provision_ignore_sentinel]).to eq(false)
+      end
+      subject.execute
+    end
+
+    it "should start the snapshot" do
+      argv << snapshot_name
+      expect(machine).to receive(:action) do |_, opts|
+        expect(opts[:snapshot_start]).to eq(true)
+      end
+      subject.execute
+    end
+
+    context "when --no-start flag is provided" do
+      let(:argv) { [snapshot_name, "--no-start"] }
+
+      it "should not start the snapshot" do
+        expect(machine).to receive(:action) do |_, opts|
+          expect(opts[:snapshot_start]).to eq(false)
+        end
+        subject.execute
+      end
+    end
   end
 end