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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2014-2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import class Dispatch.DispatchQueue
import struct Dispatch.DispatchTime
import struct TSCBasic.FileSystemError
/// An `Archiver` that handles Tar archives using the command-line `tar` tool.
public struct TarArchiver: Archiver {
public let supportedExtensions: Set<String> = ["tar", "tar.gz"]
/// The file-system implementation used for various file-system operations and checks.
private let fileSystem: FileSystem
/// Helper for cancelling in-flight requests
private let cancellator: Cancellator
/// The underlying command
private let tarCommand: String
/// Creates a `TarArchiver`.
///
/// - Parameters:
/// - fileSystem: The file system to used by the `TarArchiver`.
/// - cancellator: Cancellation handler
public init(fileSystem: FileSystem, cancellator: Cancellator? = .none) {
self.fileSystem = fileSystem
self.cancellator = cancellator ?? Cancellator(observabilityScope: .none)
#if os(Windows)
self.tarCommand = "tar.exe"
#else
self.tarCommand = "tar"
#endif
}
public func extract(
from archivePath: AbsolutePath,
to destinationPath: AbsolutePath,
completion: @escaping @Sendable (Result<Void, Error>) -> Void
) {
do {
guard self.fileSystem.exists(archivePath) else {
throw FileSystemError(.noEntry, archivePath.underlying)
}
guard self.fileSystem.isDirectory(destinationPath) else {
throw FileSystemError(.notDirectory, destinationPath.underlying)
}
let process = AsyncProcess(
arguments: [self.tarCommand, "zxf", archivePath.pathString, "-C", destinationPath.pathString]
)
guard let registrationKey = self.cancellator.register(process) else {
throw CancellationError.failedToRegisterProcess(process)
}
DispatchQueue.sharedConcurrent.async {
defer { self.cancellator.deregister(registrationKey) }
completion(.init(catching: {
try process.launch()
let processResult = try process.waitUntilExit()
guard processResult.exitStatus == .terminated(code: 0) else {
throw try StringError(processResult.utf8stderrOutput())
}
}))
}
} catch {
return completion(.failure(error))
}
}
public func compress(
directory: AbsolutePath,
to destinationPath: AbsolutePath,
completion: @escaping @Sendable (Result<Void, Error>) -> Void
) {
do {
guard self.fileSystem.isDirectory(directory) else {
throw FileSystemError(.notDirectory, directory.underlying)
}
let process = AsyncProcess(
arguments: [self.tarCommand, "acf", destinationPath.pathString, directory.basename],
environment: .current,
workingDirectory: directory.parentDirectory
)
guard let registrationKey = self.cancellator.register(process) else {
throw CancellationError.failedToRegisterProcess(process)
}
DispatchQueue.sharedConcurrent.async {
defer { self.cancellator.deregister(registrationKey) }
completion(.init(catching: {
try process.launch()
let processResult = try process.waitUntilExit()
guard processResult.exitStatus == .terminated(code: 0) else {
throw try StringError(processResult.utf8stderrOutput())
}
}))
}
} catch {
return completion(.failure(error))
}
}
public func validate(path: AbsolutePath, completion: @escaping @Sendable (Result<Bool, Error>) -> Void) {
do {
guard self.fileSystem.exists(path) else {
throw FileSystemError(.noEntry, path.underlying)
}
let process = AsyncProcess(arguments: [self.tarCommand, "tf", path.pathString])
guard let registrationKey = self.cancellator.register(process) else {
throw CancellationError.failedToRegisterProcess(process)
}
DispatchQueue.sharedConcurrent.async {
defer { self.cancellator.deregister(registrationKey) }
completion(.init(catching: {
try process.launch()
let processResult = try process.waitUntilExit()
return processResult.exitStatus == .terminated(code: 0)
}))
}
} catch {
return completion(.failure(error))
}
}
public func cancel(deadline: DispatchTime) throws {
try self.cancellator.cancel(deadline: deadline)
}
}
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