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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#pragma once
#include <utils/filepath.h>
#include <utils/qtcassert.h>
#include <llvm/Support/VirtualFileSystem.h>
namespace ClangFormat::Internal {
using namespace llvm;
using namespace llvm::vfs;
using namespace llvm::sys::fs;
using namespace Utils;
class LlvmFileAdapter : public File
{
public:
LlvmFileAdapter(const Twine &Path)
{
Q_UNUSED(Path);
}
/// Destroy the file after closing it (if open).
/// Sub-classes should generally call close() inside their destructors. We
/// cannot do that from the base class, since close is virtual.
~LlvmFileAdapter() { close(); }
/// Get the status of the file.
ErrorOr<Status> status() override
{
Q_UNIMPLEMENTED();
return std::make_error_code(std::errc::not_supported);
}
/// Get the name of the file
ErrorOr<std::string> getName() override
{
Q_UNIMPLEMENTED();
return std::make_error_code(std::errc::not_supported);
}
/// Get the contents of the file as a \p MemoryBuffer.
ErrorOr<std::unique_ptr<MemoryBuffer>> getBuffer(const Twine &Name,
int64_t FileSize = -1,
bool RequiresNullTerminator = true,
bool IsVolatile = false) override
{
Q_UNUSED(RequiresNullTerminator);
Q_UNUSED(IsVolatile);
const FilePath path = FilePath::fromUserInput(QString::fromStdString(Name.str()));
const expected_str<QByteArray> contents = path.fileContents(FileSize, 0);
QTC_ASSERT_EXPECTED(contents, return std::error_code());
return MemoryBuffer::getMemBufferCopy(contents->data(), Name);
}
/// Closes the file.
std::error_code close() override { return {}; }
protected:
};
class LlvmFileSystemAdapter : public FileSystem
{
public:
LlvmFileSystemAdapter()
: m_workingDirectory(FilePath::currentWorkingPath())
{}
ErrorOr<Status> status(const Twine &Path) override
{
const FilePath path = FilePath::fromUserInput(QString::fromStdString(Path.str()));
QFileInfo fInfo(QString::fromStdString(Path.str()));
if (!fInfo.exists())
return std::error_code();
const std::chrono::seconds modInSeconds = std::chrono::seconds(
fInfo.lastModified().toSecsSinceEpoch());
const std::chrono::time_point<std::chrono::system_clock> modTime(modInSeconds);
file_type type = file_type::status_error;
if (fInfo.isDir())
type = file_type::directory_file;
else if (fInfo.isFile())
type = file_type::regular_file;
else
QTC_ASSERT(false, return std::error_code());
Status result(Path, {0, 0}, modTime, 0, 0, fInfo.size(), type, perms::all_perms);
return result;
};
virtual ErrorOr<std::unique_ptr<File>> openFileForRead(const Twine &Path) override
{
return std::make_unique<LlvmFileAdapter>(Path);
}
/// Get a directory_iterator for \p Dir.
/// \note The 'end' iterator is directory_iterator().
vfs::directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override
{
Q_UNUSED(Dir);
Q_UNUSED(EC);
Q_UNIMPLEMENTED();
return {};
}
/// Set the working directory. This will affect all following operations on
/// this file system and may propagate down for nested file systems.
std::error_code setCurrentWorkingDirectory(const Twine &Path) override
{
Q_UNUSED(Path);
Q_UNIMPLEMENTED();
return std::make_error_code(std::errc::not_supported);
}
/// Get the working directory of this file system.
ErrorOr<std::string> getCurrentWorkingDirectory() const override
{
Q_UNIMPLEMENTED();
return std::make_error_code(std::errc::not_supported);
}
/// Gets real path of \p Path e.g. collapse all . and .. patterns, resolve
/// symlinks. For real file system, this uses `llvm::sys::fs::real_path`.
/// This returns errc::operation_not_permitted if not implemented by subclass.
std::error_code getRealPath(const Twine &Path, SmallVectorImpl<char> &Output)
#if LLVM_VERSION_MAJOR < 19
const
#endif
override
{
Q_UNUSED(Path);
Q_UNUSED(Output);
Q_UNIMPLEMENTED();
return std::make_error_code(std::errc::not_supported);
}
/// Is the file mounted on a local filesystem?
std::error_code isLocal(const Twine &Path, bool &Result) override
{
const FilePath filePath = FilePath::fromString(QString::fromStdString(Path.str()));
Result = !filePath.needsDevice();
return {};
}
std::error_code makeAbsolute(SmallVectorImpl<char> &Path) const override
{
if (Path.empty()) {
const std::string asString = m_workingDirectory.toFSPathString().toStdString();
Path.assign(asString.begin(), asString.end());
return {};
}
const FilePath filePath = FilePath::fromString(QString::fromStdString(
std::string(Path.data(), Path.size())));
if (filePath.isRelativePath()) {
const std::string asString
= m_workingDirectory.resolvePath(filePath).toFSPathString().toStdString();
Path.assign(asString.begin(), asString.end());
}
return {};
}
private:
FilePath m_workingDirectory;
};
} // namespace ClangFormat::Internal
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