[PATCH] D94699: [clangd] Set correct CWD when using compile_flags.txt

[Adam Czachorowski via Phabricator via cfe-commits]

adamcz created this revision.
Herald added subscribers: usaxena95, kadircet, arphaman.
adamcz requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay, ilya-biryukov.
Herald added a project: clang.

This fixes a bug where clangd would attempt to set CWD to the
compile_flags.txt file itself.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94699

Files:
  clang-tools-extra/clangd/GlobalCompilationDatabase.cpp
  clang-tools-extra/clangd/unittests/GlobalCompilationDatabaseTests.cpp


Index: clang-tools-extra/clangd/unittests/GlobalCompilationDatabaseTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/GlobalCompilationDatabaseTests.cpp
+++ clang-tools-extra/clangd/unittests/GlobalCompilationDatabaseTests.cpp
@@ -279,6 +279,17 @@
       << "x/build/compile_flags.json only applicable to x/";
 }
 
+TEST(GlobalCompilationDatabaseTest, CompileFlagsDirectory) {
+  MockFS FS;
+  FS.Files[testPath("x/compile_flags.txt")] = "-DFOO";
+  DirectoryBasedGlobalCompilationDatabase CDB(FS);
+  auto Commands = CDB.getCompileCommand(testPath("x/y.cpp"));
+  ASSERT_TRUE(Commands.hasValue());
+  EXPECT_THAT(Commands.getValue().CommandLine, Contains("-DFOO"));
+  // Make sure we pick the right working directory.
+  EXPECT_EQ(testPath("x"), Commands.getValue().Directory);
+}
+
 TEST(GlobalCompilationDatabaseTest, NonCanonicalFilenames) {
   OverlayCDB DB(nullptr);
   std::vector<std::string> DiscoveredFiles;
Index: clang-tools-extra/clangd/GlobalCompilationDatabase.cpp
===================================================================
--- clang-tools-extra/clangd/GlobalCompilationDatabase.cpp
+++ clang-tools-extra/clangd/GlobalCompilationDatabase.cpp
@@ -271,7 +271,8 @@
 }
 static std::unique_ptr<tooling::CompilationDatabase>
 parseFixed(PathRef Path, llvm::StringRef Data, std::string &Error) {
-  return tooling::FixedCompilationDatabase::loadFromBuffer(Path, Data, Error);
+  return tooling::FixedCompilationDatabase::loadFromBuffer(
+      llvm::sys::path::parent_path(Path), Data, Error);
 }
 
 bool DirectoryBasedGlobalCompilationDatabase::DirectoryCache::load(


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