find buildSettingsFile, primaryFile for RefenceDocumentURL

Author: Wang Lun

Sources/SourceKitLSP/Swift/ReferenceDocumentURL.swift

@@ -122,14 +122,22 @@ package enum ReferenceDocumentURL {
   var buildSettingsFile: DocumentURI {
     switch self {
     case .macroExpansion(let data): return data.primaryFile
-    case .generatedInterface(let data): return data.buildSettingsFrom
+    case .generatedInterface(let data):
+      if let referenceDocumentURL = try? ReferenceDocumentURL(from: data.buildSettingsFrom) {
+        return referenceDocumentURL.buildSettingsFile
+      }
+      return data.buildSettingsFrom
     }
   }
 
   var primaryFile: DocumentURI? {
     switch self {
     case .macroExpansion(let data): return data.primaryFile
-    case .generatedInterface(let data): return data.buildSettingsFrom.primaryFile
+    case .generatedInterface(let data):
+      if let referenceDocumentURL = try? ReferenceDocumentURL(from: data.buildSettingsFrom) {
+        return referenceDocumentURL.primaryFile
+      }
+    return data.buildSettingsFrom.primaryFile
     }
   }
 }