plugin: implement new interface methods

plugin/resource_provider.go

@@ -176,6 +176,24 @@ func (p *ResourceProvider) Refresh(
 	return resp.State, err
 }
 
+func (p *ResourceProvider) ImportState(
+	info *terraform.InstanceInfo) ([]*terraform.InstanceState, error) {
+	var resp ResourceProviderImportStateResponse
+	args := &ResourceProviderImportStateArgs{
+		Info: info,
+	}
+
+	err := p.Client.Call("Plugin.ImportState", args, &resp)
+	if err != nil {
+		return nil, err
+	}
+	if resp.Error != nil {
+		err = resp.Error
+	}
+
+	return resp.State, err
+}
+
 func (p *ResourceProvider) Resources() []terraform.ResourceType {
 	var result []terraform.ResourceType
 
@@ -245,6 +263,15 @@ type ResourceProviderRefreshResponse struct {
 	Error *plugin.BasicError
 }
 
+type ResourceProviderImportStateArgs struct {
+	Info *terraform.InstanceInfo
+}
+
+type ResourceProviderImportStateResponse struct {
+	State []*terraform.InstanceState
+	Error *plugin.BasicError
+}
+
 type ResourceProviderValidateArgs struct {
 	Config *terraform.ResourceConfig
 }
@@ -361,6 +388,17 @@ func (s *ResourceProviderServer) Refresh(
 	return nil
 }
 
+func (s *ResourceProviderServer) ImportState(
+	args *ResourceProviderImportStateArgs,
+	result *ResourceProviderImportStateResponse) error {
+	states, err := s.Provider.ImportState(args.Info)
+	*result = ResourceProviderImportStateResponse{
+		State: states,
+		Error: plugin.NewBasicError(err),
+	}
+	return nil
+}
+
 func (s *ResourceProviderServer) Resources(
 	nothing interface{},
 	result *[]terraform.ResourceType) error {

plugin/resource_provider_test.go

@@ -334,8 +334,8 @@ func TestResourceProvider_resources(t *testing.T) {
 	provider := raw.(terraform.ResourceProvider)
 
 	expected := []terraform.ResourceType{
-		{"foo"},
+		terraform.ResourceType{Name: "foo"},
-		{"bar"},
+		terraform.ResourceType{Name: "bar", Importable: true},
 	}
 
 	p.ResourcesReturn = expected