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//===--- GlobalCompilationDatabase.cpp ---------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "GlobalCompilationDatabase.h"
#include "Logger.h"
#include "clang/Tooling/CompilationDatabase.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
using namespace llvm;
namespace clang {
namespace clangd {
tooling::CompileCommand
GlobalCompilationDatabase::getFallbackCommand(PathRef File) const {
std::vector<std::string> Argv = {"clang"};
// Clang treats .h files as C by default, resulting in unhelpful diagnostics.
// Parsing as Objective C++ is friendly to more cases.
if (sys::path::extension(File) == ".h")
Argv.push_back("-xobjective-c++-header");
Argv.push_back(File);
return tooling::CompileCommand(sys::path::parent_path(File),
sys::path::filename(File), std::move(Argv),
/*Output=*/"");
}
DirectoryBasedGlobalCompilationDatabase::
DirectoryBasedGlobalCompilationDatabase(Optional<Path> CompileCommandsDir)
: CompileCommandsDir(std::move(CompileCommandsDir)) {}
DirectoryBasedGlobalCompilationDatabase::
~DirectoryBasedGlobalCompilationDatabase() = default;
Optional<tooling::CompileCommand>
DirectoryBasedGlobalCompilationDatabase::getCompileCommand(PathRef File) const {
if (auto CDB = getCDBForFile(File)) {
auto Candidates = CDB->getCompileCommands(File);
if (!Candidates.empty())
return std::move(Candidates.front());
} else {
log("Failed to find compilation database for {0}", File);
}
return None;
}
tooling::CompilationDatabase *
DirectoryBasedGlobalCompilationDatabase::getCDBInDirLocked(PathRef Dir) const {
// FIXME(ibiryukov): Invalidate cached compilation databases on changes
auto CachedIt = CompilationDatabases.find(Dir);
if (CachedIt != CompilationDatabases.end())
return CachedIt->second.get();
std::string Error = "";
auto CDB = tooling::CompilationDatabase::loadFromDirectory(Dir, Error);
auto Result = CDB.get();
CompilationDatabases.insert(std::make_pair(Dir, std::move(CDB)));
return Result;
}
tooling::CompilationDatabase *
DirectoryBasedGlobalCompilationDatabase::getCDBForFile(PathRef File) const {
namespace path = sys::path;
assert((path::is_absolute(File, path::Style::posix) ||
path::is_absolute(File, path::Style::windows)) &&
"path must be absolute");
std::lock_guard<std::mutex> Lock(Mutex);
if (CompileCommandsDir)
return getCDBInDirLocked(*CompileCommandsDir);
for (auto Path = path::parent_path(File); !Path.empty();
Path = path::parent_path(Path))
if (auto CDB = getCDBInDirLocked(Path))
return CDB;
return nullptr;
}
Optional<tooling::CompileCommand>
OverlayCDB::getCompileCommand(PathRef File) const {
{
std::lock_guard<std::mutex> Lock(Mutex);
auto It = Commands.find(File);
if (It != Commands.end())
return It->second;
}
return Base ? Base->getCompileCommand(File) : None;
}
tooling::CompileCommand OverlayCDB::getFallbackCommand(PathRef File) const {
auto Cmd = Base ? Base->getFallbackCommand(File)
: GlobalCompilationDatabase::getFallbackCommand(File);
std::lock_guard<std::mutex> Lock(Mutex);
Cmd.CommandLine.insert(Cmd.CommandLine.end(), FallbackFlags.begin(),
FallbackFlags.end());
return Cmd;
}
void OverlayCDB::setCompileCommand(
PathRef File, llvm::Optional<tooling::CompileCommand> Cmd) {
std::unique_lock<std::mutex> Lock(Mutex);
if (Cmd)
Commands[File] = std::move(*Cmd);
else
Commands.erase(File);
}
} // namespace clangd
} // namespace clang
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