Merge pull request #471 from artemcm/NoVirtualSourceFilesHere

[Dependency Scanning] Do not decode `sourceFiles` fileds of the inter-module dependency graph into VirtualPaths

Author: artemcm

Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyGraph.swift

@@ -167,7 +167,7 @@ public struct ModuleInfo: Codable {
   public var modulePath: TextualVirtualPath
 
   /// The source files used to build this module.
-  public var sourceFiles: [TextualVirtualPath]?
+  public var sourceFiles: [String]?
 
   /// The set of direct module dependencies of this module.
   public var directDependencies: [ModuleDependencyId]?
@@ -193,7 +193,7 @@ public struct ModuleInfo: Codable {
   }
 
   public init(modulePath: TextualVirtualPath,
-              sourceFiles: [TextualVirtualPath]?,
+              sourceFiles: [String]?,
               directDependencies: [ModuleDependencyId]?,
               details: Details) {
     self.modulePath = modulePath

Sources/SwiftDriver/SwiftScan/DependencyGraphBuilder.swift

@@ -89,11 +89,9 @@ private extension SwiftScan {
     // Decode module path and source file locations
     let modulePathStr = try toSwiftString(api.swiftscan_module_info_get_module_path(moduleInfoRef))
     let modulePath = TextualVirtualPath(path: try VirtualPath(path: modulePathStr))
-    let sourceFiles: [TextualVirtualPath]?
+    let sourceFiles: [String]?
     if let sourceFilesSetRef = api.swiftscan_module_info_get_source_files(moduleInfoRef) {
-      sourceFiles = try toSwiftStringArray(sourceFilesSetRef.pointee).map {
-        TextualVirtualPath(path: try VirtualPath(path: $0))
-      }
+      sourceFiles = try toSwiftStringArray(sourceFilesSetRef.pointee)
     } else {
       sourceFiles = nil
     }