Support for Items on IArtifact (#2347)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP with hierarchical enums.

* Some small fixes and improvements around artifact desc related types.

* Improvements around hierarchical enum.

* Fixes to get Artifact types refactor to be able to execute tests.

* Attempt to better categorize PTX.

* Work around for potentially unused function warning.

* Typo fix.

* Simplify Artifact header.

* Small improvements around Artifact kind/payload/style.

* Added IDestroyable/ICastable

* Add IArtifactList.

* First impl of IArtifactUtil.

* Use the ICastable interface for IArtifactRepresentation.

* Added IArtifactRepresentation & IArtifactAssociated.

* Add SLANG_OVERRIDE to avoid gcc/clang warning.

* Fix calling convention issue on win32.

* Fix missing SLANG_OVERRIDE.

* First attempt at file abstraction around Artifact.

* Added creation of lock file.

* Move functionality for determining file paths to the IArtifactUtil.
Add casting to ICastable.

* Added some casting/finding mechanisms.

* Simplify IArtifact interface, and use Items for file reps.

* Fix problem with libraries on DXIL.

2 files changed, 18 insertions, 8 deletions

diff --git a/source/slang/slang-compiler.cpp b/source/slang/slang-compiler.cpp
index 8a9c322b2..8205bcf36 100644
--- a/source/slang/slang-compiler.cpp
+++ b/source/slang/slang-compiler.cpp
@@ -1313,8 +1313,12 @@ void printDiagnosticArg(StringBuilder& sb, CodeGenTarget val)
             if (_isCPUHostTarget(target))
             {
                 options.libraryPaths.add(Path::getParentDirectory(Path::getExecutablePath()));
+
                 // Set up the library artifact
                 ComPtr<IArtifact> artifact(new Artifact(ArtifactDesc::make(ArtifactKind::Library, Artifact::Payload::HostCPU), "slang-rt"));
+                ComPtr<IFileArtifactRepresentation> fileRep(new FileArtifactRepresentation(IFileArtifactRepresentation::Kind::NameOnly, "slang-rt", nullptr, nullptr));
+                artifact->addItem(fileRep);
+
                 options.libraries.add(artifact);
             }
         }
diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index f56395f5b..ab658fe18 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -1488,17 +1488,23 @@ struct OptionsParser
                     // Seeing as on all targets the baseName doesn't have an extension, and all library types do
                     // if the name doesn't have an extension we can assume there is no path to it.
                     
-                    if (Path::getPathExt(path).getLength() > 0)
+                    ComPtr<IFileArtifactRepresentation> fileRep;
+                    if (Path::getPathExt(path).getLength() <= 0)
                     {
-                        // Set the path
-                        artifact->setPath(Artifact::PathType::Existing, path.getBuffer());
+                        // If there is no extension *assume* it is the name of a system level library
+                        fileRep = new FileArtifactRepresentation(IFileArtifactRepresentation::Kind::NameOnly, path, nullptr, nullptr);
                     }
+                    else
+                    {
+                        fileRep = new FileArtifactRepresentation(IFileArtifactRepresentation::Kind::Reference, path, nullptr, nullptr);
+                        if (!fileRep->exists())
+                        {
+                            sink->diagnose(referenceModuleName.loc, Diagnostics::libraryDoesNotExist, path);
+                            return SLANG_FAIL;
+                        }
+                    }
+                    artifact->addItem(fileRep);
 
-                    // TODO(JS): We might want to check if the artifact exists.
-                    // If the artifact is a CPU (or downstream compiler) library
-                    // it may be findable by some other mechanism, so we probably don't want to check existance and just let the
-                    // downstream compiler handle.
-                    
                     SLANG_RETURN_ON_FAIL(_addLibraryReference(requestImpl, artifact));
                 }
                 else if (argValue == "-v" || argValue == "-version")