public OperationsFactory([CanBeNull] string startupProject, [CanBeNull] string environment)
{
var project = Directory.GetCurrentDirectory();
startupProject = startupProject ?? project;
var startupProjectContext = ProjectContext.CreateContextForEachFramework(startupProject).First();
var projectContext = ProjectContext.CreateContextForEachFramework(project).First();
var startupAssemblyName = new AssemblyName(startupProjectContext.ProjectFile.Name);
var assemblyName = new AssemblyName(projectContext.ProjectFile.Name);
var assemblyLoadContext = startupProjectContext.CreateLoadContext();
_startupAssembly = assemblyLoadContext.LoadFromAssemblyName(startupAssemblyName);
try
{
_assembly = assemblyLoadContext.LoadFromAssemblyName(assemblyName);
}
catch (Exception ex)
{
throw new OperationException(
CommandsStrings.UnreferencedAssembly(
projectContext.ProjectFile.Name,
startupProjectContext.ProjectFile.Name),
ex);
}
_environment = environment;
_projectDir = projectContext.ProjectDirectory;
_rootNamespace = projectContext.ProjectFile.Name;
}
public OperationExecutor([NotNull] object logHandler, [NotNull] IDictionary args)
{
Check.NotNull(logHandler, nameof(logHandler));
Check.NotNull(args, nameof(args));
var unwrappedLogHandler = ForwardingProxy.Unwrap <IOperationLogHandler>(logHandler);
var loggerProvider = new LoggerProvider(name => new CommandLoggerAdapter(name, unwrappedLogHandler));
var targetName = (string)args["targetName"];
var startupTargetName = (string)args["startupTargetName"];
var environment = (string)args["environment"];
var projectDir = (string)args["projectDir"];
var rootNamespace = (string)args["rootNamespace"];
var startupAssembly = Assembly.Load(new AssemblyName(startupTargetName));
Assembly assembly;
try
{
assembly = Assembly.Load(new AssemblyName(targetName));
}
catch (Exception ex)
{
throw new OperationException(CommandsStrings.UnreferencedAssembly(targetName, startupTargetName), ex);
}
_contextOperations = new LazyRef <DbContextOperations>(
() => new DbContextOperations(
loggerProvider,
assembly,
startupAssembly,
projectDir, environment));
_databaseOperations = new LazyRef <DatabaseOperations>(
() => new DatabaseOperations(
loggerProvider,
assembly,
startupAssembly,
environment,
projectDir,
rootNamespace));
_migrationsOperations = new LazyRef <MigrationsOperations>(
() => new MigrationsOperations(
loggerProvider,
assembly,
startupAssembly,
environment,
projectDir,
rootNamespace));
}
private Assembly GetAssembly()
{
if (_assembly == null)
{
try
{
_assembly = Assembly.Load(new AssemblyName(_assemblyName));
}
catch (Exception ex)
{
throw new OperationException(CommandsStrings.UnreferencedAssembly(_assemblyName, _startupAssemblyName), ex);
}
}
return(_assembly);
}
private IDictionary <Type, Func <DbContext> > FindContextTypes()
{
_logger.Value.LogDebug(CommandsStrings.LogFindingContexts);
var startupAssembly = Assembly.Load(new AssemblyName(_startupAssemblyName));
var contexts = new Dictionary <Type, Func <DbContext> >();
// Look for IDbContextFactory implementations
var contextFactories = startupAssembly.GetConstructibleTypes()
.Where(t => typeof(IDbContextFactory <DbContext>).GetTypeInfo().IsAssignableFrom(t));
foreach (var factory in contextFactories)
{
var manufacturedContexts =
from i in factory.ImplementedInterfaces
where i.GetTypeInfo().IsGenericType &&
i.GetGenericTypeDefinition() == typeof(IDbContextFactory <>)
select i.GenericTypeArguments[0];
foreach (var context in manufacturedContexts)
{
contexts.Add(
context,
() => ((IDbContextFactory <DbContext>)Activator.CreateInstance(factory.AsType())).Create());
}
}
// Look for DbContext classes registered in the service provider
var registeredContexts = _runtimeServices.GetServices <DbContextOptions>()
.Select(o => o.GetType().GenericTypeArguments[0]);
foreach (var context in registeredContexts.Where(c => !contexts.ContainsKey(c)))
{
contexts.Add(
context,
FindContextFactory(context) ?? (() => (DbContext)_runtimeServices.GetRequiredService(context)));
}
// Look for DbContext classes in assemblies
Assembly assembly;
try
{
assembly = Assembly.Load(new AssemblyName(_assemblyName));
}
catch (Exception ex)
{
throw new OperationException(CommandsStrings.UnreferencedAssembly(_assemblyName, _startupAssemblyName), ex);
}
var types = startupAssembly.GetConstructibleTypes()
.Concat(assembly.GetConstructibleTypes())
.Select(i => i.AsType());
var contextTypes = types.Where(t => typeof(DbContext).IsAssignableFrom(t))
.Concat(
types.Where(t => typeof(Migration).IsAssignableFrom(t))
.Select(t => t.GetTypeInfo().GetCustomAttribute <DbContextAttribute>()?.ContextType)
.Where(t => t != null))
.Distinct();
foreach (var context in contextTypes.Where(c => !contexts.ContainsKey(c)))
{
contexts.Add(
context,
FindContextFactory(context) ?? (() => (DbContext)Activator.CreateInstance(context)));
}
return(contexts);
}
