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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org 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 https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Foundation
/// Executes body with a URL to a temporary directory that will be deleted after
/// the closure finishes executing.
func withTemporaryDirectory<T>(_ body: (URL) throws -> T) throws -> T {
let tempDirURL = FileManager.default.temporaryDirectory.appendingPathComponent(UUID().uuidString)
try FileManager.default.createDirectory(at: tempDirURL, withIntermediateDirectories: true)
defer {
try? FileManager.default.removeItem(at: tempDirURL)
}
return try body(tempDirURL)
}
/// Infer the default toolchain using `xcrun`.
///
/// Returns `nil` on all platforms except for macOS.
func defaultToolchain() -> URL? {
#if os(macOS)
do {
let swiftcPath = try ProcessRunner(executableURL: try Paths.xcrunExec, arguments: ["--find", "swiftc"])
.run(verbose: false)
.stdout
.trimmingCharacters(in: .whitespacesAndNewlines)
if swiftcPath.isEmpty {
return nil
}
return URL(fileURLWithPath: swiftcPath).deletingLastPathComponent().deletingLastPathComponent()
} catch {
return nil
}
#else
// Toolchain lookup not implemented without xcrun yet
return nil
#endif
}
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