private void PopulateDependenciesInternal(IDictionary <string, FileNode> allFiles, bool preferNativeImage, ILog log, Stack <FileNode> stack)
{
if (stack == null)
{
stack = new Stack <FileNode>();
}
if (stack.Contains(this))
{
log.LogMessage($"Cycle detected: {String.Join(" -> ", stack)} -> {this}");
}
if (dependencies != null)
{
return;
}
stack.Push(this);
dependencies = new HashSet <FileNode>();
if (File.Exists(SourceFile))
{
PopulateDependenciesFromMetadata(allFiles, preferNativeImage, log, stack);
}
else
{
IsMissing = true;
}
// allow for components to specify their dependencies themselves, by placing a file next to their source file.
var additionalDependenciesFile = SourceFile + AdditionalDependenciesFileSuffix;
if (File.Exists(additionalDependenciesFile))
{
foreach (var additionalDependency in File.ReadAllLines(additionalDependenciesFile))
{
if (additionalDependency.Length == 0 || additionalDependency[0] == '#')
{
continue;
}
FileNode additionalDependencyFile;
if (allFiles.TryGetValue(additionalDependency, out additionalDependencyFile))
{
dependencies.Add(additionalDependencyFile);
}
else
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit dependency {additionalDependency} of {SourceFile} specified in {additionalDependenciesFile}.");
}
}
}
// Files may be related to other files via OriginalItemSpec
if (OriginalItem != null)
{
var relatedToPath = OriginalItem.GetMetadata("OriginalItemSpec");
if (!String.IsNullOrEmpty(relatedToPath))
{
var relatedToFileName = Path.GetFileName(relatedToPath);
FileNode relatedTo = null;
if (allFiles.TryGetValue(relatedToFileName, out relatedTo))
{
if (relatedTo.IsAggregate)
{
bool found = false;
foreach (var dependency in relatedTo.Dependencies)
{
if (dependency.SourceFile.Equals(relatedToPath, StringComparison.OrdinalIgnoreCase))
{
found = true;
dependency.relatedFiles.Add(this);
break;
}
}
if (!found)
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec. Considered {string.Join(";", relatedTo.Dependencies.Select(d => d.SourceFile))} but they did not match");
}
}
else if (relatedTo.SourceFile.Equals(relatedToPath, StringComparison.OrdinalIgnoreCase))
{
relatedTo.relatedFiles.Add(this);
}
else
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec. Considered {relatedTo.SourceFile} but it didn't match.");
}
}
if (relatedTo == null)
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec.");
}
}
}
stack.Pop();
}
private string GetMetadata(string name)
{
var value = OriginalItem.GetMetadata(name);
return((value?.Length > 0) ? value : null);
}
private void PopulateDependenciesInternal(IDictionary <string, FileNode> allFiles, bool preferNativeImage, ILog log, Stack <FileNode> stack)
{
if (stack == null)
{
stack = new Stack <FileNode>();
}
if (stack.Contains(this))
{
log.LogMessage($"Cycle detected: {String.Join(" -> ", stack)} -> {this}");
}
if (dependencies != null)
{
return;
}
stack.Push(this);
dependencies = new HashSet <FileNode>();
try
{
using (var peReader = new PEReader(new FileStream(SourceFile, FileMode.Open, FileAccess.Read, FileShare.Delete | FileShare.Read)))
{
if (peReader.HasMetadata)
{
var reader = peReader.GetMetadataReader();
var includeDependencies = true;
// map of facade handles to enable quickly getting to FileNode without repeatedly looking up by name
var facadeHandles = new Dictionary <AssemblyReferenceHandle, FileNode>();
if (IsFullFacade(reader))
{
// don't include dependencies in full facades. We'll instead follow their typeforwards and promote the dependencies to the parent.
includeDependencies = false;
// follow typeforwards in any full facade.
followTypeForwards = true;
}
foreach (var handle in reader.AssemblyReferences)
{
var reference = reader.GetAssemblyReference(handle);
var referenceName = reader.GetString(reference.Name);
FileNode referencedFile = TryGetFileForReference(referenceName, allFiles, preferNativeImage);
if (referencedFile != null)
{
if (includeDependencies)
{
dependencies.Add(referencedFile);
}
// populate dependencies of child
referencedFile.PopulateDependenciesInternal(allFiles, preferNativeImage, log, stack);
// if we're following type-forwards out of any dependency make sure to look at typerefs from this assembly.
// and populate the type-forwards in the dependency
if (referencedFile.followTypeForwards || followTypeForwards)
{
facadeHandles.Add(handle, referencedFile);
}
}
else
{
// static dependency that wasn't satisfied, this can happen if folks use
// lightup code to guard the static dependency.
// this can also happen when referencing a package that isn't implemented
// on this platform but don't fail the build here
log.LogMessage(LogImportance.Low, $"Could not locate assembly dependency {referenceName} of {SourceFile}.");
}
}
if (followTypeForwards)
{
// if following typeforwards out of this assembly, capture all type forwards
foreach (var exportedTypeHandle in reader.ExportedTypes)
{
var exportedType = reader.GetExportedType(exportedTypeHandle);
if (exportedType.IsForwarder)
{
var assemblyReferenceHandle = (AssemblyReferenceHandle)exportedType.Implementation;
FileNode assemblyReferenceNode;
if (facadeHandles.TryGetValue(assemblyReferenceHandle, out assemblyReferenceNode))
{
var typeName = exportedType.Namespace.IsNil ?
reader.GetString(exportedType.Name) :
reader.GetString(exportedType.Namespace) + reader.GetString(exportedType.Name);
typeForwards.Add(typeName, assemblyReferenceNode);
}
}
}
}
else if (facadeHandles.Count > 0)
{
// if examining type forwards in some dependency, enumerate type-refs
// for any that point at a facade assembly.
foreach (var typeReferenceHandle in reader.TypeReferences)
{
var typeReference = reader.GetTypeReference(typeReferenceHandle);
var resolutionScope = typeReference.ResolutionScope;
if (resolutionScope.Kind == HandleKind.AssemblyReference)
{
var assemblyReferenceHandle = (AssemblyReferenceHandle)resolutionScope;
FileNode assemblyReferenceNode;
if (facadeHandles.TryGetValue(assemblyReferenceHandle, out assemblyReferenceNode))
{
var typeName = typeReference.Namespace.IsNil ?
reader.GetString(typeReference.Name) :
reader.GetString(typeReference.Namespace) + reader.GetString(typeReference.Name);
FileNode typeForwardedToNode = null;
var forwardAssemblies = new Stack <FileNode>();
// while assembly forwarded to is also a facade, add a dependency on the target
while (assemblyReferenceNode.followTypeForwards)
{
if (!assemblyReferenceNode.typeForwards.TryGetValue(typeName, out typeForwardedToNode))
{
break;
}
dependencies.Add(typeForwardedToNode);
forwardAssemblies.Push(assemblyReferenceNode);
// look at the target in case it is also a facade
assemblyReferenceNode = typeForwardedToNode;
if (forwardAssemblies.Contains(assemblyReferenceNode))
{
// type-forward cycle, bail
log.LogMessage($"Cycle detected involving type-forwards: {String.Join(" -> ", forwardAssemblies)}");
break;
}
}
}
}
}
}
// examine native module dependencies
for (int i = 1, count = reader.GetTableRowCount(TableIndex.ModuleRef); i <= count; i++)
{
var moduleRef = reader.GetModuleReference(MetadataTokens.ModuleReferenceHandle(i));
var moduleName = reader.GetString(moduleRef.Name);
var moduleRefCandidates = new[] { moduleName, moduleName + ".dll", moduleName + ".so", moduleName + ".dylib" };
FileNode referencedNativeFile = null;
foreach (var moduleRefCandidate in moduleRefCandidates)
{
if (allFiles.TryGetValue(moduleRefCandidate, out referencedNativeFile))
{
break;
}
}
if (referencedNativeFile != null)
{
dependencies.Add(referencedNativeFile);
}
else
{
// DLLImport that wasn't satisfied
}
}
}
}
}
catch (BadImageFormatException)
{
// not a PE
}
// allow for components to specify their dependencies themselves, by placing a file next to their source file.
var additionalDependenciesFile = SourceFile + AdditionalDependenciesFileSuffix;
if (File.Exists(additionalDependenciesFile))
{
foreach (var additionalDependency in File.ReadAllLines(additionalDependenciesFile))
{
if (additionalDependency.Length == 0 || additionalDependency[0] == '#')
{
continue;
}
FileNode additionalDependencyFile;
if (allFiles.TryGetValue(additionalDependency, out additionalDependencyFile))
{
dependencies.Add(additionalDependencyFile);
}
else
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit dependency {additionalDependency} of {SourceFile} specified in {additionalDependenciesFile}.");
}
}
}
// Files may be related to other files via OriginalItemSpec
if (OriginalItem != null)
{
var relatedToPath = OriginalItem.GetMetadata("OriginalItemSpec");
if (!String.IsNullOrEmpty(relatedToPath))
{
var relatedToFileName = Path.GetFileName(relatedToPath);
FileNode relatedTo = null;
if (allFiles.TryGetValue(relatedToFileName, out relatedTo))
{
if (relatedTo.IsAggregate)
{
bool found = false;
foreach (var dependency in relatedTo.Dependencies)
{
if (dependency.SourceFile.Equals(relatedToPath, StringComparison.OrdinalIgnoreCase))
{
found = true;
dependency.relatedFiles.Add(this);
break;
}
}
if (!found)
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec. Considered {string.Join(";", relatedTo.Dependencies.Select(d => d.SourceFile))} but they did not match");
}
}
else if (relatedTo.SourceFile.Equals(relatedToPath, StringComparison.OrdinalIgnoreCase))
{
relatedTo.relatedFiles.Add(this);
}
else
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec. Considered {relatedTo.SourceFile} but it didn't match.");
}
}
if (relatedTo == null)
{
log.LogMessage(LogImportance.Low, $"Could not locate explicit parent {relatedToPath} of {SourceFile} specified in OriginalItemSpec.");
}
}
}
stack.Pop();
}