[clang-tools-extra] [clangd] Introduce --skip-preamble-build command line option (PR #189284)

[Aleksandr Platonov via cfe-commits]

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@@ -1005,6 +1013,16 @@ clangd accepts flags on the commandline, and in the CLANGD_FLAGS environment var
   }
   Opts.UseDirtyHeaders = UseDirtyHeaders;
   Opts.PreambleParseForwardingFunctions = PreambleParseForwardingFunctions;
+  if (ExperimentalModulesSupport &&
+      SkipPreambleBuild.getNumOccurrences() == 0) {
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ArcsinX wrote:

Thanks, addressed.

P.S. As a side effect, your original concern has also been fixed for cases where the module code does not import other modules.

https://github.com/llvm/llvm-project/pull/189284