1 files changed, 71 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Tooling/LocateToolCompilationDatabase.cpp b/contrib/llvm-project/clang/lib/Tooling/LocateToolCompilationDatabase.cpp
new file mode 100644
index 000000000000..033f69f3760c
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Tooling/LocateToolCompilationDatabase.cpp
@@ -0,0 +1,71 @@
+//===- GuessTargetAndModeCompilationDatabase.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Tooling/Tooling.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Program.h"
+#include <memory>
+
+namespace clang {
+namespace tooling {
+
+namespace {
+class LocationAdderDatabase : public CompilationDatabase {
+public:
+  LocationAdderDatabase(std::unique_ptr<CompilationDatabase> Base)
+      : Base(std::move(Base)) {
+    assert(this->Base != nullptr);
+  }
+
+  std::vector<std::string> getAllFiles() const override {
+    return Base->getAllFiles();
+  }
+
+  std::vector<CompileCommand> getAllCompileCommands() const override {
+    return addLocation(Base->getAllCompileCommands());
+  }
+
+  std::vector<CompileCommand>
+  getCompileCommands(StringRef FilePath) const override {
+    return addLocation(Base->getCompileCommands(FilePath));
+  }
+
+private:
+  std::vector<CompileCommand>
+  addLocation(std::vector<CompileCommand> Cmds) const {
+    for (auto &Cmd : Cmds) {
+      if (Cmd.CommandLine.empty())
+        continue;
+      std::string &Driver = Cmd.CommandLine.front();
+      // If the driver name already is absolute, we don't need to do anything.
+      if (llvm::sys::path::is_absolute(Driver))
+        continue;
+      // If the name is a relative path, like bin/clang, we assume it's
+      // possible to resolve it and don't do anything about it either.
+      if (llvm::any_of(Driver,
+                       [](char C) { return llvm::sys::path::is_separator(C); }))
+        continue;
+      auto Absolute = llvm::sys::findProgramByName(Driver);
+      // If we found it in path, update the entry in Cmd.CommandLine
+      if (Absolute && llvm::sys::path::is_absolute(*Absolute))
+        Driver = std::move(*Absolute);
+    }
+    return Cmds;
+  }
+  std::unique_ptr<CompilationDatabase> Base;
+};
+} // namespace
+
+std::unique_ptr<CompilationDatabase>
+inferToolLocation(std::unique_ptr<CompilationDatabase> Base) {
+  return std::make_unique<LocationAdderDatabase>(std::move(Base));
+}
+
+} // namespace tooling
+} // namespace clang