public MigrationsOperations(
[NotNull] ILoggerProvider loggerProvider,
[NotNull] Assembly assembly,
[NotNull] Assembly startupAssembly,
[CanBeNull] string environment,
[NotNull] string projectDir,
[NotNull] string rootNamespace)
{
Check.NotNull(loggerProvider, nameof(loggerProvider));
Check.NotNull(assembly, nameof(assembly));
Check.NotNull(startupAssembly, nameof(startupAssembly));
Check.NotNull(projectDir, nameof(projectDir));
Check.NotNull(rootNamespace, nameof(rootNamespace));
var loggerFactory = new LoggerFactory();
loggerFactory.AddProvider(loggerProvider);
_loggerProvider = loggerProvider;
_logger = new LazyRef <ILogger>(() => loggerFactory.CreateCommandsLogger());
_assembly = assembly;
_projectDir = projectDir;
_rootNamespace = rootNamespace;
_contextOperations = new DbContextOperations(
loggerProvider,
assembly,
startupAssembly,
projectDir,
environment);
var startup = new StartupInvoker(startupAssembly, environment);
_servicesBuilder = new DesignTimeServicesBuilder(startup);
}