1 //===- ExpandResponseFileCompilationDataBase.cpp --------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "clang/Tooling/CompilationDatabase.h" 10 #include "llvm/ADT/StringRef.h" 11 #include "llvm/ADT/Triple.h" 12 #include "llvm/Support/CommandLine.h" 13 #include "llvm/Support/ConvertUTF.h" 14 #include "llvm/Support/ErrorOr.h" 15 #include "llvm/Support/Host.h" 16 #include "llvm/Support/MemoryBuffer.h" 17 #include "llvm/Support/Path.h" 18 #include "llvm/Support/StringSaver.h" 19 20 namespace clang { 21 namespace tooling { 22 namespace { 23 24 class ExpandResponseFilesDatabase : public CompilationDatabase { 25 public: 26 ExpandResponseFilesDatabase( 27 std::unique_ptr<CompilationDatabase> Base, 28 llvm::cl::TokenizerCallback Tokenizer, 29 llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS) 30 : Base(std::move(Base)), Tokenizer(Tokenizer), FS(std::move(FS)) { 31 assert(this->Base != nullptr); 32 assert(this->Tokenizer != nullptr); 33 assert(this->FS != nullptr); 34 } 35 36 std::vector<std::string> getAllFiles() const override { 37 return Base->getAllFiles(); 38 } 39 40 std::vector<CompileCommand> 41 getCompileCommands(StringRef FilePath) const override { 42 return expand(Base->getCompileCommands(FilePath)); 43 } 44 45 std::vector<CompileCommand> getAllCompileCommands() const override { 46 return expand(Base->getAllCompileCommands()); 47 } 48 49 private: 50 std::vector<CompileCommand> expand(std::vector<CompileCommand> Cmds) const { 51 for (auto &Cmd : Cmds) { 52 bool SeenRSPFile = false; 53 llvm::SmallVector<const char *, 20> Argv; 54 Argv.reserve(Cmd.CommandLine.size()); 55 for (auto &Arg : Cmd.CommandLine) { 56 Argv.push_back(Arg.c_str()); 57 if (!Arg.empty()) 58 SeenRSPFile |= Arg.front() == '@'; 59 } 60 if (!SeenRSPFile) 61 continue; 62 llvm::BumpPtrAllocator Alloc; 63 llvm::cl::ExpansionContext ECtx(Alloc, Tokenizer); 64 ECtx.setVFS(FS.get()) 65 .setCurrentDir(Cmd.Directory) 66 .expandResponseFiles(Argv); 67 // Don't assign directly, Argv aliases CommandLine. 68 std::vector<std::string> ExpandedArgv(Argv.begin(), Argv.end()); 69 Cmd.CommandLine = std::move(ExpandedArgv); 70 } 71 return Cmds; 72 } 73 74 private: 75 std::unique_ptr<CompilationDatabase> Base; 76 llvm::cl::TokenizerCallback Tokenizer; 77 llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS; 78 }; 79 80 } // namespace 81 82 std::unique_ptr<CompilationDatabase> 83 expandResponseFiles(std::unique_ptr<CompilationDatabase> Base, 84 llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS) { 85 auto Tokenizer = llvm::Triple(llvm::sys::getProcessTriple()).isOSWindows() 86 ? llvm::cl::TokenizeWindowsCommandLine 87 : llvm::cl::TokenizeGNUCommandLine; 88 return std::make_unique<ExpandResponseFilesDatabase>( 89 std::move(Base), Tokenizer, std::move(FS)); 90 } 91 92 } // namespace tooling 93 } // namespace clang 94