ExpandResponseFilesCompilationDatabase.cpp revision 360784 
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/MemoryBuffer.h"
16#include "llvm/Support/Path.h"
17#include "llvm/Support/StringSaver.h"
18
19namespace clang {
20namespace tooling {
21namespace {
22
23class ExpandResponseFilesDatabase : public CompilationDatabase {
24public:
25  ExpandResponseFilesDatabase(
26      std::unique_ptr<CompilationDatabase> Base,
27      llvm::cl::TokenizerCallback Tokenizer,
28      llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS)
29      : Base(std::move(Base)), Tokenizer(Tokenizer), FS(std::move(FS)) {
30    assert(this->Base != nullptr);
31    assert(this->Tokenizer != nullptr);
32    assert(this->FS != nullptr);
33  }
34
35  std::vector<std::string> getAllFiles() const override {
36    return Base->getAllFiles();
37  }
38
39  std::vector<CompileCommand>
40  getCompileCommands(StringRef FilePath) const override {
41    return expand(Base->getCompileCommands(FilePath));
42  }
43
44  std::vector<CompileCommand> getAllCompileCommands() const override {
45    return expand(Base->getAllCompileCommands());
46  }
47
48private:
49  std::vector<CompileCommand> expand(std::vector<CompileCommand> Cmds) const {
50    for (auto &Cmd : Cmds) {
51      bool SeenRSPFile = false;
52      llvm::SmallVector<const char *, 20> Argv;
53      Argv.reserve(Cmd.CommandLine.size());
54      for (auto &Arg : Cmd.CommandLine) {
55        Argv.push_back(Arg.c_str());
56        SeenRSPFile |= Arg.front() == '@';
57      }
58      if (!SeenRSPFile)
59        continue;
60      llvm::BumpPtrAllocator Alloc;
61      llvm::StringSaver Saver(Alloc);
62      llvm::cl::ExpandResponseFiles(Saver, Tokenizer, Argv, false, false, *FS,
63                                    llvm::StringRef(Cmd.Directory));
64      // Don't assign directly, Argv aliases CommandLine.
65      std::vector<std::string> ExpandedArgv(Argv.begin(), Argv.end());
66      Cmd.CommandLine = std::move(ExpandedArgv);
67    }
68    return Cmds;
69  }
70
71private:
72  std::unique_ptr<CompilationDatabase> Base;
73  llvm::cl::TokenizerCallback Tokenizer;
74  llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS;
75};
76
77} // namespace
78
79std::unique_ptr<CompilationDatabase>
80expandResponseFiles(std::unique_ptr<CompilationDatabase> Base,
81                    llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS) {
82  auto Tokenizer = llvm::Triple(llvm::sys::getProcessTriple()).isOSWindows()
83                       ? llvm::cl::TokenizeWindowsCommandLine
84                       : llvm::cl::TokenizeGNUCommandLine;
85  return std::make_unique<ExpandResponseFilesDatabase>(
86      std::move(Base), Tokenizer, std::move(FS));
87}
88
89} // namespace tooling
90} // namespace clang
91