[PATCH] D104030: [clang][deps] Move invocation adjustments from `clang-scan-deps` to `DependencyScanning` library

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 created this revision.
jansvoboda11 added reviewers: Bigcheese, dexonsmith, arphaman.
jansvoboda11 requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

The `clang-scan-deps` tool has some logic that parses and modifies the original Clang command-line. The goal is to setup `DependencyOutputOptions` by injecting `-M -MT <target>` and prevent the creation of output files.

This patch moves the logic into the `DependencyScanning` library, and uses the parsed `CompilerInvocation` instead of the raw command-line. The code simpler and can be used from the C++ API as well.

The `-o /dev/null` arguments are not necessary, since the `DependencyScanning` library only runs a preprocessing action, so there's no way it'll produce an actual object file.

Some related tests were updated.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104030

Files:
  clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
  clang/test/ClangScanDeps/modules-pch.c
  clang/test/ClangScanDeps/modules.cpp
  clang/test/ClangScanDeps/regular_cdb.cpp
  clang/tools/clang-scan-deps/ClangScanDeps.cpp

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