[clang] [clang][DependencyScanning] Remove dependency on clangDriver from clangDependencyScanning (PR #169964)

[Jan Svoboda via cfe-commits]

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@@ -17,17 +17,53 @@ module transitive { header "transitive.h" }
 // This is here to verify that the "root" directory doesn't clash with name of
 // the "root" module.
 
+//--- main.cpp
+// empty
+
 //--- cdb.json.template
 [{
   "file": "",
   "directory": "DIR",
-  "command": "clang -fmodules -fmodules-cache-path=DIR/cache -I DIR -x c"
+  "command": "clang -fmodules -fmodules-cache-path=DIR/cache -I DIR -x c main.cpp"
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jansvoboda11 wrote:

I think the entire point of the by-module-name scan is that you don't need an input file. Why is this necessary?

https://github.com/llvm/llvm-project/pull/169964