/// <summary>
/// Get a list of all embedded assemblies
/// </summary>
/// <returns>IEnumerable with a containing the names of the resource and of the assemblie</returns>
public IEnumerable <string> EmbeddedAssemblyNames(IEnumerable <Assembly> assembliesToCheck = null)
{
foreach (var loadedAssembly in assembliesToCheck ?? LoadedAssemblies.Where(pair => !AssembliesToIgnore.IsMatch(pair.Key)).Select(pair => pair.Value).ToList())
{
string[] resources;
try
{
resources = Resources.GetCachedManifestResourceNames(loadedAssembly);
}
catch (Exception ex)
{
Log.Warn().WriteLine(ex, "Couldn't retrieve resources from {0}", loadedAssembly.GetName().Name);
continue;
}
foreach (var resource in resources)
{
var resourceMatch = _assemblyResourceNameRegex.Match(resource);
if (resourceMatch.Success)
{
yield return(resourceMatch.Groups["assembly"].Value);
}
}
}
}
/// <summary>
/// This is called when a new assembly is loaded, we need to know this
/// </summary>
/// <param name="sender">object</param>
/// <param name="args">AssemblyLoadEventArgs</param>
private void AssemblyLoad(object sender, AssemblyLoadEventArgs args)
{
var loadedAssembly = args.LoadedAssembly;
var assemblyName = loadedAssembly.GetName().Name;
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Loaded {0}", assemblyName);
}
LoadedAssemblies[assemblyName] = loadedAssembly;
if (!_applicationConfig.ScanForEmbeddedAssemblies)
{
return;
}
// Ignore resource checking on certain assemblies
if (AssembliesToIgnore.IsMatch(assemblyName))
{
return;
}
string[] resources;
try
{
resources = Resources.GetCachedManifestResourceNames(loadedAssembly);
}
catch (Exception ex)
{
Log.Warn().WriteLine(ex, "Couldn't retrieve resources from {0}", loadedAssembly.GetName().Name);
return;
}
foreach (var resource in resources)
{
var resourceMatch = _assemblyResourceNameRegex.Match(resource);
if (!resourceMatch.Success)
{
continue;
}
var embeddedAssemblyName = resourceMatch.Groups["assembly"].Value;
if (LoadedAssemblies.ContainsKey(embeddedAssemblyName))
{
// Ignoring already loaded assembly, as we cannot unload.
continue;
}
var newAssemblyLocation = new AssemblyLocationInformation(embeddedAssemblyName, loadedAssembly, resource);
if (AvailableAssemblies.TryGetValue(embeddedAssemblyName, out var availableAssemblyLocationInformation))
{
if (availableAssemblyLocationInformation.FileDate > newAssemblyLocation.FileDate)
{
continue;
}
}
if (Log.IsVerboseEnabled())
{
Log.Verbose().WriteLine("Detected additional assembly {0} in {1}", embeddedAssemblyName, loadedAssembly.GetName().Name);
}
AvailableAssemblies[embeddedAssemblyName] = newAssemblyLocation;
}
}
/// <summary>
/// Do the one time scan of all the assemblies
/// </summary>
private void ScanForAssemblies()
{
var assemblies = new HashSet <AssemblyLocationInformation>();
if (_applicationConfig.ScanForEmbeddedAssemblies)
{
foreach (var loadedAssembly in LoadedAssemblies.Where(pair => !AssembliesToIgnore.IsMatch(pair.Key)).Select(pair => pair.Value).ToList())
{
string[] resources;
try
{
resources = Resources.GetCachedManifestResourceNames(loadedAssembly);
}
catch (Exception ex)
{
Log.Warn().WriteLine(ex, "Couldn't retrieve resources from {0}", loadedAssembly.GetName().Name);
continue;
}
foreach (var resource in resources)
{
var resourceMatch = _assemblyResourceNameRegex.Match(resource);
if (resourceMatch.Success)
{
assemblies.Add(new AssemblyLocationInformation(resourceMatch.Groups["assembly"].Value, loadedAssembly, resource));
}
}
}
}
if (_applicationConfig.UseStrictChecking)
{
foreach (var applicationConfigScanDirectory in _applicationConfig.ScanDirectories)
{
if (!Directory.Exists(applicationConfigScanDirectory))
{
throw new DirectoryNotFoundException(applicationConfigScanDirectory);
}
}
}
foreach (var fileLocation in FileLocations.Scan(_applicationConfig.ScanDirectories, _assemblyFilenameRegex, SearchOption.TopDirectoryOnly))
{
assemblies.Add(new AssemblyLocationInformation(fileLocation.Item2.Groups["assembly"].Value, fileLocation.Item1));
}
// Reduce step 1) Take from the double assemblies only those which are embedded & on the file system in the probing path
foreach (var assemblyGroup in assemblies.GroupBy(information => information.Name).ToList())
{
var groupList = assemblyGroup.ToList();
if (groupList.Count <= 1)
{
continue;
}
// Remove filesystem assemblies from the list which are not in the AssemblyResolveDirectories
var unneededAssemblies = groupList.Where(info => !info.IsEmbedded && !info.IsOnProbingPath).ToList();
if (groupList.Count - unneededAssemblies.Count < 1)
{
continue;
}
foreach (var unneededAssemblyInformation in unneededAssemblies)
{
assemblies.Remove(unneededAssemblyInformation);
}
}
// Reduce step 2)
foreach (var assemblyGroup in assemblies.GroupBy(information => information.Name).ToList())
{
var groupList = assemblyGroup.ToList();
if (groupList.Count <= 1)
{
continue;
}
// Remove assemblies which are older
foreach (var unneededAssemblyInformation in groupList.OrderBy(info => info.FileDate).Skip(1).ToList())
{
assemblies.Remove(unneededAssemblyInformation);
}
}
// Create the assembly locations
foreach (var assemblyLocationInformation in assemblies)
{
AvailableAssemblies[assemblyLocationInformation.Name] = assemblyLocationInformation;
}
}