[clang] [clang][deps] Add module map describing compiled module to file dependencies. (PR #160226)

[Ben Langmuir via cfe-commits]

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@@ -444,9 +444,11 @@ void ModuleDepCollector::applyDiscoveredDependencies(CompilerInvocation &CI) {
       if (OptionalFileEntryRef CurrentModuleMap =
               PP.getHeaderSearchInfo()
                   .getModuleMap()
-                  .getModuleMapFileForUniquing(CurrentModule))
+                  .getModuleMapFileForUniquing(CurrentModule)) {
         CI.getFrontendOpts().ModuleMapFiles.emplace_back(
             CurrentModuleMap->getNameAsRequested());
+        Consumer.handleFileDependency(CurrentModuleMap->getNameAsRequested());
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benlangmuir wrote:

All other file dependencies go through `addFileDep` which handles making the file path match the expected style (absolute, with native path separators).  That's why you're seeing a relative modulemap path.

https://github.com/llvm/llvm-project/pull/160226