clang  10.0.0svn
DarwinSDKInfo.cpp
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1 //===--- DarwinSDKInfo.cpp - SDK Information parser for darwin - ----------===//
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 
10 #include "llvm/Support/ErrorOr.h"
11 #include "llvm/Support/JSON.h"
12 #include "llvm/Support/MemoryBuffer.h"
13 #include "llvm/Support/Path.h"
14 
15 using namespace clang::driver;
16 using namespace clang;
17 
19 driver::parseDarwinSDKInfo(llvm::vfs::FileSystem &VFS, StringRef SDKRootPath) {
20  llvm::SmallString<256> Filepath = SDKRootPath;
21  llvm::sys::path::append(Filepath, "SDKSettings.json");
22  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
23  VFS.getBufferForFile(Filepath);
24  if (!File) {
25  // If the file couldn't be read, assume it just doesn't exist.
26  return None;
27  }
29  llvm::json::parse(File.get()->getBuffer());
30  if (!Result)
31  return Result.takeError();
32 
33  if (const auto *Obj = Result->getAsObject()) {
34  auto VersionString = Obj->getString("Version");
35  if (VersionString) {
36  VersionTuple Version;
37  if (!Version.tryParse(*VersionString))
38  return DarwinSDKInfo(Version);
39  }
40  }
41  return llvm::make_error<llvm::StringError>("invalid SDKSettings.json",
42  llvm::inconvertibleErrorCode());
43 }
The information about the darwin SDK that was used during this compilation.
Definition: DarwinSDKInfo.h:21
Expected< Optional< DarwinSDKInfo > > parseDarwinSDKInfo(llvm::vfs::FileSystem &VFS, StringRef SDKRootPath)
Parse the SDK information from the SDKSettings.json file.
Dataflow Directional Tag Classes.