forked from OSchip/llvm-project
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
//===--- GlobalCompilationDatabase.cpp --------------------------*- C++-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===---------------------------------------------------------------------===//
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#include "GlobalCompilationDatabase.h"
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#include "Logger.h"
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#include "clang/Tooling/CompilationDatabase.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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namespace clang {
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namespace clangd {
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tooling::CompileCommand
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GlobalCompilationDatabase::getFallbackCommand(PathRef File) const {
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return tooling::CompileCommand(llvm::sys::path::parent_path(File),
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llvm::sys::path::filename(File),
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{"clang", File.str()},
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/*Output=*/"");
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}
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DirectoryBasedGlobalCompilationDatabase::
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DirectoryBasedGlobalCompilationDatabase(
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llvm::Optional<Path> CompileCommandsDir)
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: CompileCommandsDir(std::move(CompileCommandsDir)) {}
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llvm::Optional<tooling::CompileCommand>
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DirectoryBasedGlobalCompilationDatabase::getCompileCommand(PathRef File) const {
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if (auto CDB = getCDBForFile(File)) {
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auto Candidates = CDB->getCompileCommands(File);
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if (!Candidates.empty()) {
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addExtraFlags(File, Candidates.front());
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return std::move(Candidates.front());
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}
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} else {
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log("Failed to find compilation database for " + Twine(File));
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}
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return llvm::None;
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}
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tooling::CompileCommand
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DirectoryBasedGlobalCompilationDatabase::getFallbackCommand(
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PathRef File) const {
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auto C = GlobalCompilationDatabase::getFallbackCommand(File);
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addExtraFlags(File, C);
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return C;
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}
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void DirectoryBasedGlobalCompilationDatabase::setCompileCommandsDir(Path P) {
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std::lock_guard<std::mutex> Lock(Mutex);
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CompileCommandsDir = P;
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CompilationDatabases.clear();
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}
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void DirectoryBasedGlobalCompilationDatabase::setExtraFlagsForFile(
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PathRef File, std::vector<std::string> ExtraFlags) {
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std::lock_guard<std::mutex> Lock(Mutex);
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ExtraFlagsForFile[File] = std::move(ExtraFlags);
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}
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void DirectoryBasedGlobalCompilationDatabase::addExtraFlags(
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PathRef File, tooling::CompileCommand &C) const {
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std::lock_guard<std::mutex> Lock(Mutex);
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auto It = ExtraFlagsForFile.find(File);
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if (It == ExtraFlagsForFile.end())
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return;
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auto &Args = C.CommandLine;
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assert(Args.size() >= 2 && "Expected at least [compiler, source file]");
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// The last argument of CommandLine is the name of the input file.
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// Add ExtraFlags before it.
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Args.insert(Args.end() - 1, It->second.begin(), It->second.end());
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}
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tooling::CompilationDatabase *
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DirectoryBasedGlobalCompilationDatabase::getCDBInDirLocked(PathRef Dir) const {
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// FIXME(ibiryukov): Invalidate cached compilation databases on changes
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auto CachedIt = CompilationDatabases.find(Dir);
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if (CachedIt != CompilationDatabases.end())
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return CachedIt->second.get();
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std::string Error = "";
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auto CDB = tooling::CompilationDatabase::loadFromDirectory(Dir, Error);
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if (CDB)
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CDB = tooling::inferMissingCompileCommands(std::move(CDB));
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auto Result = CDB.get();
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CompilationDatabases.insert(std::make_pair(Dir, std::move(CDB)));
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return Result;
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}
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tooling::CompilationDatabase *
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DirectoryBasedGlobalCompilationDatabase::getCDBForFile(PathRef File) const {
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namespace path = llvm::sys::path;
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assert((path::is_absolute(File, path::Style::posix) ||
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path::is_absolute(File, path::Style::windows)) &&
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"path must be absolute");
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std::lock_guard<std::mutex> Lock(Mutex);
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if (CompileCommandsDir)
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return getCDBInDirLocked(*CompileCommandsDir);
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for (auto Path = path::parent_path(File); !Path.empty();
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Path = path::parent_path(Path))
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if (auto CDB = getCDBInDirLocked(Path))
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return CDB;
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return nullptr;
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}
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} // namespace clangd
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} // namespace clang
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