private static AssemblyLoadContext CreateLoadContext(string assemblyPath, Core.ILogger logger = null)
{
var validatedPath = ValidateFilePath(assemblyPath, logger);
if (validatedPath == null)
{
return(null);
}
var mainAssemblyName = Path.GetFileNameWithoutExtension(validatedPath);
var builder = new AssemblyLoadContextBuilder();
// Set base directory.
var baseDir = Path.GetDirectoryName(validatedPath);
builder.SetBaseDirectory(baseDir);
logger?.LogTrace($"Base directory: '{baseDir}'");
// Add deps file as a source for finding dependencies.
var depsJsonFile = Path.Combine(baseDir, $"{mainAssemblyName}.deps.json");
if (File.Exists(depsJsonFile))
{
builder.AddDependencyContext(depsJsonFile);
logger?.LogTrace($"Added '{depsJsonFile}' as a deps file dependency");
}
// Add runtimeconfig file as a source for finding dependencies.
var pluginRuntimeConfigFile = Path.Combine(baseDir, $"{mainAssemblyName}.runtimeconfig.json");
builder.TryAddAdditionalProbingPathFromRuntimeConfig(pluginRuntimeConfigFile, includeDevConfig: true, out _);
return(builder.Build());
}
private static AssemblyLoadContext CreateLoadContext(
string baseDir,
PluginConfig config,
Type[] sharedTypes)
{
var depsJsonFile = Path.Combine(baseDir, config.MainAssembly.Name + ".deps.json");
var builder = new AssemblyLoadContextBuilder();
if (File.Exists(depsJsonFile))
{
builder.AddDependencyContext(depsJsonFile);
}
builder.SetBaseDirectory(baseDir);
foreach (var ext in config.PrivateAssemblies)
{
builder.PreferLoadContextAssembly(ext);
}
if (sharedTypes != null)
{
foreach (var type in sharedTypes)
{
builder.PreferDefaultLoadContextAssembly(type.Assembly.GetName());
}
}
var runtimeConfigFile = Path.Combine(baseDir, config.MainAssembly.Name + ".runtimeconfig.json");
builder.TryAddAdditionalProbingPathFromRuntimeConfig(runtimeConfigFile, includeDevConfig: true, out _);
return(builder.Build());
}
private static AssemblyLoadContextBuilder CreateLoadContextBuilder(PluginConfig config)
{
var builder = new AssemblyLoadContextBuilder();
builder.SetMainAssemblyPath(config.MainAssemblyPath);
foreach (var ext in config.PrivateAssemblies)
{
builder.PreferLoadContextAssembly(ext);
}
if (config.PreferSharedTypes)
{
builder.PreferDefaultLoadContext(true);
}
#if FEATURE_UNLOAD
if (config.IsUnloadable || config.EnableHotReload)
{
builder.EnableUnloading();
}
if (config.EnableHotReload)
{
builder.PreloadAssembliesIntoMemory();
}
#endif
foreach (var assemblyName in config.SharedAssemblies)
{
builder.PreferDefaultLoadContextAssembly(assemblyName);
}
#if !FEATURE_NATIVE_RESOLVER
// In .NET Core 3.0, this code is unnecessary because the API, AssemblyDependencyResolver, handles parsing these files.
var baseDir = Path.GetDirectoryName(config.MainAssemblyPath);
var assemblyFileName = Path.GetFileNameWithoutExtension(config.MainAssemblyPath);
var depsJsonFile = Path.Combine(baseDir, assemblyFileName + ".deps.json");
if (File.Exists(depsJsonFile))
{
builder.AddDependencyContext(depsJsonFile);
}
var pluginRuntimeConfigFile = Path.Combine(baseDir, assemblyFileName + ".runtimeconfig.json");
builder.TryAddAdditionalProbingPathFromRuntimeConfig(pluginRuntimeConfigFile, includeDevConfig: true, out _);
// Always include runtimeconfig.json from the host app.
// in some cases, like `dotnet test`, the entry assembly does not actually match with the
// runtime config file which is why we search for all files matching this extensions.
foreach (var runtimeconfig in Directory.GetFiles(AppContext.BaseDirectory, "*.runtimeconfig.json"))
{
builder.TryAddAdditionalProbingPathFromRuntimeConfig(runtimeconfig, includeDevConfig: true, out _);
}
#endif
return(builder);
}
private static AssemblyLoadContext CreateLoadContext(
string baseDir,
PluginConfig config,
Type[] sharedTypes,
PluginLoaderOptions loaderOptions)
{
var depsJsonFile = Path.Combine(baseDir, config.MainAssembly.Name + ".deps.json");
var builder = new AssemblyLoadContextBuilder();
if (File.Exists(depsJsonFile))
{
builder.AddDependencyContext(depsJsonFile);
}
builder.SetBaseDirectory(baseDir);
foreach (var ext in config.PrivateAssemblies)
{
builder.PreferLoadContextAssembly(ext);
}
if (loaderOptions.HasFlag(PluginLoaderOptions.PreferSharedTypes))
{
builder.PreferDefaultLoadContext(true);
}
#if FEATURE_UNLOAD
if (loaderOptions.HasFlag(PluginLoaderOptions.IsUnloadable))
{
builder.EnableUnloading();
}
#endif
if (sharedTypes != null)
{
foreach (var type in sharedTypes)
{
builder.PreferDefaultLoadContextAssembly(type.Assembly.GetName());
}
}
var pluginRuntimeConfigFile = Path.Combine(baseDir, config.MainAssembly.Name + ".runtimeconfig.json");
builder.TryAddAdditionalProbingPathFromRuntimeConfig(pluginRuntimeConfigFile, includeDevConfig: true, out _);
// Always include runtimeconfig.json from the host app.
// in some cases, like `dotnet test`, the entry assembly does not actually match with the
// runtime config file which is why we search for all files matching this extensions.
foreach (var runtimeconfig in Directory.GetFiles(AppContext.BaseDirectory, "*.runtimeconfig.json"))
{
builder.TryAddAdditionalProbingPathFromRuntimeConfig(runtimeconfig, includeDevConfig: true, out _);
}
return(builder.Build());
}
public static AssemblyLoadContextBuilder AddDependencyContextWithCompileDeps(this AssemblyLoadContextBuilder builder, string depsFilePath)
{
var reader = new DependencyContextJsonReader();
using (var file = File.OpenRead(depsFilePath))
{
var deps = reader.Read(file);
builder.SetBaseDirectory(Path.GetDirectoryName(depsFilePath));
builder.AddDependencyContext(deps);
builder.AddCompileDependencies(deps);
}
return(builder);
}