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0e58b7fd14
Adds the -vfsoverlay frontend option that enables the user to pass VFS overlay YAML files to Swift. These files define a (potentially many-layered) virtual mapping on which we predicate a VFS. Switch all input-based memory buffer reads in the Frontend to the new FileSystem-based approach.
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
//===--- FileSystem.h - Extra helpers for manipulating files ----*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_FILESYSTEM_H
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#define SWIFT_BASIC_FILESYSTEM_H
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <system_error>
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namespace clang {
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namespace vfs {
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class FileSystem;
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}
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}
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namespace swift {
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/// Moves a file from \p source to \p destination, unless there is already
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/// a file at \p destination that contains the same data as \p source.
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///
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/// In the latter case, the file at \p source is deleted. If an error occurs,
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/// the file at \p source will still be present at \p source.
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std::error_code moveFileIfDifferent(const llvm::Twine &source,
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const llvm::Twine &destination);
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namespace vfs {
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getFileOrSTDIN(clang::vfs::FileSystem &FS,
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const llvm::Twine &Name, int64_t FileSize = -1,
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bool RequiresNullTerminator = true, bool IsVolatile = false);
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} // end namespace vfs
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} // end namespace swift
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#endif // SWIFT_BASIC_FILESYSTEM_H
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