private static IReadOnlyList <Assembly> LoadAssemblyFromName(
AssemblyLoadContext loadContext,
AssemblyName assemblyName,
IEnumerable <string> dependencyDirectories,
Core.ILogger logger = null)
{
// If assembly exists in any of the dependency paths then load it from there.
var dependencyPath = dependencyDirectories.
Select(d =>
{
try
{
return
(Directory.EnumerateFiles(d, $"{assemblyName.Name}.dll", SearchOption.AllDirectories).
FirstOrDefault());
}
catch (Exception)
{
return(null);
}
}).
Where(p => p != null).
FirstOrDefault();
if (!string.IsNullOrEmpty(dependencyPath))
{
return(LoadAssemblyFromPath(loadContext, dependencyPath, dependencyDirectories, logger));
}
// Otherwise load by name from the context.
var output = new List <Assembly>();
try
{
output.Add(loadContext.LoadFromAssemblyName(assemblyName));
logger?.LogTrace($"Loaded assembly: '{output[0].FullName}'");
}
catch (Exception e)
{
if (logger != null)
{
logger?.LogWarning($"Failed to load assembly: {e.Message.ToDistinctLines()}");
}
return(Array.Empty <Assembly>());
}
// Load referenced assemblies.
foreach (var referencedAssemblyName in output[0].GetReferencedAssemblies())
{
if (!IsAssemblyLoaded(referencedAssemblyName))
{
output.AddRange(
LoadAssemblyFromName(loadContext, referencedAssemblyName, dependencyDirectories, logger));
}
}
return(output);
}
private static IReadOnlyList <Assembly> LoadAssemblyFromPath(
AssemblyLoadContext loadContext,
string path,
IEnumerable <string> dependencyDirectories,
Core.ILogger logger = null)
{
// Validate path.
var validatedPath = ValidateFilePath(path, logger);
if (validatedPath == null)
{
return(Array.Empty <Assembly>());
}
// Load assembly.
var output = new List <Assembly>();
try
{
output.Add(loadContext.LoadFromAssemblyPath(validatedPath));
logger?.LogTrace($"Loaded assembly: '{output[0].FullName}'");
}
catch (Exception e)
{
if (logger != null)
{
logger?.LogWarning($"Failed to load assembly: {e.Message.ToDistinctLines()}");
}
return(Array.Empty <Assembly>());
}
// Load referenced assemblies.
foreach (var referencedAssemblyName in output[0].GetReferencedAssemblies())
{
if (!IsAssemblyLoaded(referencedAssemblyName))
{
output.AddRange(
LoadAssemblyFromName(loadContext, referencedAssemblyName, dependencyDirectories, logger));
}
}
return(output);
}