Add API for querying dependency files on IModule (#4493)

* Add API for querying dependency files on IModule

* return nullptr

2 files changed, 21 insertions, 0 deletions

diff --git a/source/slang/slang-compiler.cpp b/source/slang/slang-compiler.cpp
index cee104dc9..e61c0f220 100644
--- a/source/slang/slang-compiler.cpp
+++ b/source/slang/slang-compiler.cpp
@@ -2471,6 +2471,18 @@ namespace Slang
         return nullptr;
     }
 
+    SLANG_NO_THROW SlangInt32 SLANG_MCALL Module::getDependencyFileCount()
+    {
+        return (SlangInt32)getFileDependencies().getCount();
+    }
+
+    SLANG_NO_THROW char const* SLANG_MCALL Module::getDependencyFilePath(
+        SlangInt32 index)
+    {
+        SourceFile* sourceFile = getFileDependencies()[index];
+        return sourceFile->getPathInfo().hasFoundPath() ? sourceFile->getPathInfo().foundPath.getBuffer() : nullptr;
+    }
+
     void validateEntryPoint(
         EntryPoint* entryPoint,
         DiagnosticSink* sink);
diff --git a/source/slang/slang-compiler.h b/source/slang/slang-compiler.h
index 056e6ea21..46724119b 100755
--- a/source/slang/slang-compiler.h
+++ b/source/slang/slang-compiler.h
@@ -1453,6 +1453,15 @@ namespace Slang
         /// Get the unique identity of the module.
         virtual SLANG_NO_THROW const char* SLANG_MCALL getUniqueIdentity() override;
 
+        /// Get the number of dependency files that this module depends on.
+        /// This includes both the explicit source files, as well as any
+        /// additional files that were transitively referenced (e.g., via
+        /// a `#include` directive).
+        virtual SLANG_NO_THROW SlangInt32 SLANG_MCALL getDependencyFileCount() override;
+
+        /// Get the path to a file this module depends on.
+        virtual SLANG_NO_THROW char const* SLANG_MCALL getDependencyFilePath(
+            SlangInt32 index) override;
 
         virtual void buildHash(DigestBuilder<SHA1>& builder) SLANG_OVERRIDE;