private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
{
Assembly result;
if (_cache.TryGetValue(args.Name, out result))
{
return(result);
}
var pattern = @"^(?<name>[^,]+),[ ]*Version=(?<version>[^,]+)(,[ ]*Culture=(?<culture>[^,]+))?(,[ ]*PublicKeyToken=(?<token>[^,]+))?$";
var matchResult = Regex.Match(args.Name, pattern);
if (!matchResult.Success)
{
return(null);
}
var assemblyName = matchResult.Groups["name"].Value;
Version assemblyVersion;
Version.TryParse(matchResult.Groups["version"].Value, out assemblyVersion);
var expectedAssemblyDirectory = Path.Combine(_temporaryDirectory, assemblyName).EnsureSlash();
var expectedAssemblyPath = Path.Combine(expectedAssemblyDirectory, assemblyVersion.ToString(), assemblyName + ".dll");
string resolvedPath = null;
if (File.Exists(expectedAssemblyPath))
{
resolvedPath = expectedAssemblyPath;
}
else
{
foreach (var directory in _directoriesToScan)
{
var possibleAssemblyPath = Path.Combine(directory, assemblyName + ".dll");
if (!File.Exists(possibleAssemblyPath))
{
continue;
}
CacheAssembly(possibleAssemblyPath);
}
}
if (File.Exists(expectedAssemblyPath))
{
resolvedPath = expectedAssemblyPath;
}
else
{
var versions = IOExtensions.SearchDirectories(expectedAssemblyDirectory + "\\*")
.Items
.Select(d =>
{
d = d.TrimEnd('\\');
Version v;
Version.TryParse(d.Substring(d.LastIndexOf('\\') + 1), out v);
return(v);
})
.Where(v => v != null)
.OrderByDescending(r => r).ToList();
if (versions.Any())
{
resolvedPath = Path.Combine(expectedAssemblyDirectory, versions.First().ToString(), assemblyName + ".dll");
}
}
if (string.IsNullOrWhiteSpace(resolvedPath))
{
_logger.Warn($"# Assembly {args.Name} not resolved");
_cache.TryAdd(args.Name, null);
return(null);
}
_logger.Info($"# Assembly {args.Name} resolved with {resolvedPath}");
result = Assembly.LoadFile(resolvedPath);
_cache.TryAdd(args.Name, result);
return(result);
}