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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2023-2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Foundation
@preconcurrency package import SystemPackage
public actor OSFileSystem: AsyncFileSystem {
public static let defaultChunkSize = 512 * 1024
let readChunkSize: Int
private let ioQueue = DispatchQueue(label: "org.swift.sdk-generator-io")
package init(readChunkSize: Int = defaultChunkSize) {
self.readChunkSize = readChunkSize
}
package func withOpenReadableFile<T: Sendable>(
_ path: FilePath,
_ body: (OpenReadableFile) async throws -> T
) async throws -> T {
let fd = try FileDescriptor.open(path, .readOnly)
// Can't use ``FileDescriptor//closeAfter` here, as that doesn't support async closures.
do {
let result = try await body(.init(chunkSize: readChunkSize, fileHandle: .real(fd, self.ioQueue)))
try fd.close()
return result
} catch {
try fd.close()
throw error.attach(path)
}
}
package func withOpenWritableFile<T: Sendable>(
_ path: FilePath,
_ body: (OpenWritableFile) async throws -> T
) async throws -> T {
let fd = try FileDescriptor.open(
path,
.writeOnly,
options: [.create, .truncate],
permissions: [
.groupRead,
.otherRead,
.ownerReadWrite
]
)
do {
let result = try await body(.init(storage: .real(fd, self.ioQueue), path: path))
try fd.close()
return result
} catch {
try fd.close()
throw error.attach(path)
}
}
package func exists(_ path: SystemPackage.FilePath) async -> Bool {
FileManager.default.fileExists(atPath: path.string)
}
}
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