| 1 | //===-- MockSymlinkFileSystem.h |
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| 2 | //--------------------------------------------------===// |
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| 3 | // |
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| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 5 | // See https://llvm.org/LICENSE.txt for license information. |
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| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 7 | // |
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| 8 | //===----------------------------------------------------------------------===// |
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| 9 | |
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| 10 | #include "lldb/Utility/FileSpec.h" |
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| 11 | #include "llvm/Support/VirtualFileSystem.h" |
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| 12 | |
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| 13 | namespace lldb_private { |
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| 14 | |
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| 15 | // A mock file system that realpath's a given symlink to a given realpath. |
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| 16 | class MockSymlinkFileSystem : public llvm::vfs::FileSystem { |
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| 17 | public: |
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| 18 | // Treat all files as non-symlinks. |
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| 19 | MockSymlinkFileSystem() = default; |
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| 20 | |
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| 21 | /// Treat \a symlink as a symlink to \a realpath. Treat all other files as |
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| 22 | /// non-symlinks. |
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| 23 | MockSymlinkFileSystem(FileSpec &&symlink, FileSpec &&realpath, |
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| 24 | FileSpec::Style style = FileSpec::Style::native) |
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| 25 | : m_symlink(std::move(symlink)), m_realpath(std::move(realpath)), |
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| 26 | m_style(style) {} |
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| 27 | |
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| 28 | /// If \a Path matches the symlink given in the ctor, put the realpath given |
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| 29 | /// in the ctor into \a Output. |
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| 30 | std::error_code getRealPath(const llvm::Twine &Path, |
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| 31 | llvm::SmallVectorImpl<char> &Output) override { |
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| 32 | if (FileSpec(Path.str(), m_style) == m_symlink) { |
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| 33 | std::string path = m_realpath.GetPath(); |
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| 34 | Output.assign(in_start: path.begin(), in_end: path.end()); |
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| 35 | } else { |
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| 36 | Path.toVector(Out&: Output); |
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| 37 | } |
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| 38 | return {}; |
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| 39 | } |
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| 40 | |
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| 41 | // Implement the rest of the interface |
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| 42 | llvm::ErrorOr<llvm::vfs::Status> status(const llvm::Twine &Path) override { |
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| 43 | return llvm::errc::operation_not_permitted; |
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| 44 | } |
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| 45 | llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>> |
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| 46 | openFileForRead(const llvm::Twine &Path) override { |
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| 47 | return llvm::errc::operation_not_permitted; |
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| 48 | } |
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| 49 | llvm::vfs::directory_iterator dir_begin(const llvm::Twine &Dir, |
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| 50 | std::error_code &EC) override { |
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| 51 | return llvm::vfs::directory_iterator(); |
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| 52 | } |
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| 53 | std::error_code setCurrentWorkingDirectory(const llvm::Twine &Path) override { |
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| 54 | return llvm::errc::operation_not_permitted; |
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| 55 | } |
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| 56 | llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override { |
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| 57 | return llvm::errc::operation_not_permitted; |
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| 58 | } |
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| 59 | |
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| 60 | private: |
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| 61 | FileSpec m_symlink; |
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| 62 | FileSpec m_realpath; |
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| 63 | FileSpec::Style m_style; |
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| 64 | }; |
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| 65 | |
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| 66 | } // namespace lldb_private |
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| 67 | |
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