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1//===-- MockSymlinkFileSystem.h2//--------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#include "lldb/Utility/FileSpec.h"11#include "llvm/Support/VirtualFileSystem.h"12 13namespace lldb_private {14 15// A mock file system that realpath's a given symlink to a given realpath.16class MockSymlinkFileSystem : public llvm::vfs::FileSystem {17public:18 // Treat all files as non-symlinks.19 MockSymlinkFileSystem() = default;20 21 /// Treat \a symlink as a symlink to \a realpath. Treat all other files as22 /// non-symlinks.23 MockSymlinkFileSystem(FileSpec &&symlink, FileSpec &&realpath,24 FileSpec::Style style = FileSpec::Style::native)25 : m_symlink(std::move(symlink)), m_realpath(std::move(realpath)),26 m_style(style) {}27 28 /// If \a Path matches the symlink given in the ctor, put the realpath given29 /// in the ctor into \a Output.30 std::error_code getRealPath(const llvm::Twine &Path,31 llvm::SmallVectorImpl<char> &Output) override {32 if (FileSpec(Path.str(), m_style) == m_symlink) {33 std::string path = m_realpath.GetPath();34 Output.assign(path.begin(), path.end());35 } else {36 Path.toVector(Output);37 }38 return {};39 }40 41 // Implement the rest of the interface42 llvm::ErrorOr<llvm::vfs::Status> status(const llvm::Twine &Path) override {43 return llvm::errc::operation_not_permitted;44 }45 llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>>46 openFileForRead(const llvm::Twine &Path) override {47 return llvm::errc::operation_not_permitted;48 }49 llvm::vfs::directory_iterator dir_begin(const llvm::Twine &Dir,50 std::error_code &EC) override {51 return llvm::vfs::directory_iterator();52 }53 std::error_code setCurrentWorkingDirectory(const llvm::Twine &Path) override {54 return llvm::errc::operation_not_permitted;55 }56 llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override {57 return llvm::errc::operation_not_permitted;58 }59 60private:61 FileSpec m_symlink;62 FileSpec m_realpath;63 FileSpec::Style m_style;64};65 66} // namespace lldb_private67