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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
#if os(Windows)
import WinSDK
#endif
extension URL {
/// Returns a `Bool` to indicate if the given `URL` leads to the root of a filesystem.
/// A non-filesystem type `URL` will always return false.
@_spi(Testing) public var isRoot: Bool {
guard isFileURL else { return false }
#if compiler(>=6.1)
#if os(Windows)
let filePath = self.withUnsafeFileSystemRepresentation { pointer in
guard let pointer else {
return ""
}
return String(cString: pointer)
}
return filePath.withCString(encodedAs: UTF16.self, PathCchIsRoot)
#else // os(Windows)
return self.path == "/"
#endif // os(Windows)
#else // compiler(>=6.1)
#if os(Windows)
// This is needed as the fixes from #844 aren't in the Swift 6.0 toolchain.
// https://github.com/swiftlang/swift-format/issues/844
var pathComponents = self.pathComponents
if pathComponents.first == "/" {
// Canonicalize `/C:/` to `C:/`.
pathComponents = Array(pathComponents.dropFirst())
}
return pathComponents.count <= 1
#else // os(Windows)
// On Linux, we may end up with an string for the path due to https://github.com/swiftlang/swift-foundation/issues/980
// This is needed as the fixes from #980 aren't in the Swift 6.0 toolchain.
return self.path == "/" || self.path == ""
#endif // os(Windows)
#endif // compiler(>=6.1)
}
}
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