first commit

repository/provider.go

@@ -0,0 +1,39 @@
+package repository
+
+import (
+	"arno/skeletor/service"
+
+	"github.com/pkg/errors"
+	"gorm.io/gorm"
+)
+
+const ServiceName service.Name = "repository"
+
+func ServiceProvider(db *gorm.DB) service.Provider {
+	return func(ctn *service.Container) (interface{}, error) {
+		return db, nil
+	}
+}
+
+func From(container *service.Container) (*gorm.DB, error) {
+	service, err := container.Service(ServiceName)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error while retrieving '%s' service", ServiceName)
+	}
+
+	srv, ok := service.(*gorm.DB)
+	if !ok {
+		return nil, errors.Errorf("retrieved service is not a valid '%s' service", ServiceName)
+	}
+
+	return srv, nil
+}
+
+func Must(container *service.Container) *gorm.DB {
+	srv, err := From(container)
+	if err != nil {
+		panic(err)
+	}
+
+	return srv
+}