// Add all appropriate references to the compilation and set it as our final compilation
// state.
private async Task <Compilation> FinalizeCompilationAsync(
Solution solution,
Compilation compilation,
CancellationToken cancellationToken)
{
try
{
var newReferences = new List <MetadataReference>();
newReferences.AddRange(this.ProjectState.MetadataReferences);
foreach (var projectReference in this.ProjectState.ProjectReferences)
{
var referencedProject = solution.GetProject(projectReference.ProjectId);
// Even though we're creating a final compilation (vs. an in progress compilation),
// it's possible that the target project has been removed.
if (referencedProject != null)
{
// If both projects are submissions, we'll count this as a previous submission link
// instead of a regular metadata reference
if (referencedProject.IsSubmission)
{
// if the referenced project is a submission project must be a submission as well:
Debug.Assert(this.ProjectState.IsSubmission);
var previousSubmissionCompilation =
await solution.GetCompilationAsync(projectReference.ProjectId, cancellationToken).ConfigureAwait(false);
compilation = compilation.WithPreviousSubmission(previousSubmissionCompilation);
}
else
{
var metadataReference = await solution.GetMetadataReferenceAsync(
projectReference, this.ProjectState, cancellationToken).ConfigureAwait(false);
// The compilation doesn't want to receive a null entry in the set
// of references it is constructed with. A reference can fail to be
// created if a skeleton assembly could not be constructed.
if (metadataReference != null)
{
newReferences.Add(metadataReference);
}
}
}
}
if (!Enumerable.SequenceEqual(compilation.References, newReferences))
{
compilation = compilation.WithReferences(newReferences);
}
this.WriteState(new FinalState(this.Retain(solution, compilation)));
return(compilation);
}
catch (Exception e) if (ExceptionHelpers.CrashUnlessCanceled(e))
{
throw ExceptionUtilities.Unreachable;
}
}
/// <summary>
/// Tries to get the latest snapshot of the compilation without waiting for it to be
/// fully built. This method takes advantage of the progress side-effect produced during
/// BuildCompilation. It will either return the already built compilation, any
/// in-progress compilation or any known old compilation in that order of preference.
/// The compilation state that is returned will have a compilation that is retained so
/// that it cannot disappear.
/// </summary>
private void GetPartialCompilationState(
Solution solution,
DocumentId id,
out ProjectState inProgressProject,
out Compilation inProgressCompilation,
CancellationToken cancellationToken)
{
var state = this.ReadState();
inProgressCompilation = state.Compilation.GetValue(cancellationToken);
// check whether we can bail out quickly for typing case
var inProgressState = state as InProgressState;
// all changes left for this document is modifying the given document.
// we can use current state as it is since we will replace the document with latest document anyway.
if (inProgressState != null &&
inProgressCompilation != null &&
inProgressState.IntermediateProjects.All(t => TouchDocumentActionForDocument(t, id)))
{
inProgressProject = this.ProjectState;
return;
}
inProgressProject = inProgressState != null?inProgressState.IntermediateProjects.First().Item1 : this.ProjectState;
// if we already have a final compilation we are done.
if (inProgressCompilation != null && state is FinalState)
{
return;
}
// 1) if we have an in-progress compilation use it.
// 2) If we don't, then create a simple empty compilation/project.
// 3) then, make sure that all it's p2p refs and whatnot are correct.
if (inProgressCompilation == null)
{
inProgressProject = inProgressProject.RemoveAllDocuments();
inProgressCompilation = this.CreateEmptyCompilation();
}
// first remove all project from the project and compilation.
inProgressProject = inProgressProject.WithProjectReferences(ImmutableArray.Create <ProjectReference>());
// Now add in back a consistent set of project references. For project references
// try to get either a CompilationReference or a SkeletonReference. This ensures
// that the in-progress project only reports a reference to another project if it
// could actually get a reference to that project's metadata.
var metadataReferences = new List <MetadataReference>();
var newProjectReferences = new List <ProjectReference>();
metadataReferences.AddRange(this.ProjectState.MetadataReferences);
foreach (var projectReference in this.ProjectState.ProjectReferences)
{
var referencedProject = solution.GetProject(projectReference.ProjectId);
if (referencedProject != null)
{
#if SCRIPTING
if (referencedProject.IsSubmission)
{
var compilation = solution.GetCompilationAsync(projectReference.ProjectId, cancellationToken).WaitAndGetResult(cancellationToken);
inProgressCompilation = inProgressCompilation.WithPreviousSubmission(compilation);
}
else
#endif
{
// get the latest metadata for the partial compilation of the referenced project.
var metadata = solution.GetPartialMetadataReference(projectReference, this.ProjectState, cancellationToken);
if (metadata == null)
{
// if we failed to get the metadata, check to see if we previously had existing metadata and reuse it instead.
metadata = inProgressCompilation.References.FirstOrDefault(r => solution.GetProjectId(r) == projectReference.ProjectId);
}
if (metadata != null)
{
newProjectReferences.Add(projectReference);
metadataReferences.Add(metadata);
}
}
}
}
inProgressProject = inProgressProject.AddProjectReferences(newProjectReferences);
if (!Enumerable.SequenceEqual(inProgressCompilation.References, metadataReferences))
{
inProgressCompilation = inProgressCompilation.WithReferences(metadataReferences);
}
}